The mineral industry of India

The ball mill is an indispensable part in the beneficiation equipment and plays an important role in the crush techniques. The main types of ball mill are: cone energy-saving ball mill, Overflow Ball Mill, grid ball mill, tube ball mill, intermittent ball mill/ Ceramic ball mill, roller bearing ball mill, etc. In this text, Henan BEBON machinery mainly introduces the operation, maintenance, and examination of the overflow ball mill, offering convenience to the ball mill customers for references.

1. Operating Instruction:

Ball Grinder Mill

(1). Check every section of the machine and the electric appliance to make sure the connecting bolt is tight before running. Make sure the lubricating point is smooth, the transmission device is reliable, the protective device is perfect, the electric appliance instrument is delicate, and the motor carbon is well contacted.

(2). Walk around the mill to make sure no barrier is around or in the moving parts of the equipment. When running, there shouldn’t be anyone around.

(3). Turn on the starter motor by press activate button and notice the change of the electric after all is checked normal. The continuous start of the ball mill can’t be over two times and the interval can’t be over 5 minutes. If you start the third time, you should first check it with electrician and locksmith. It can’t be start with other equipment and must start alternately to avoid tripping operation.

(4). Strictly keep to the rule on water supply, ore feeding, and steel ball adding when in normal operation. The overloaded operation is forbidden. The idle running time can’t be over 15 minutes to avoid breaking up lining plate.

(5). Check the barrel to avoid leakage and make sure the electric current, the voltage , the feedstock and the feedwater are normal when in operation. Check the temperature of the electric motor and principal axis once per half an hour to keep it lower than 60 centigrade degree. Once a problem is found, try to solve it in time.

(6). Check the rotation situations of the hollow shaft and the oil ring and the temperature of the hollow shaft when in operation. Once the hollow shaft is hot, the forced cooling measure should be taken immediately when near the burning tile. You can’t stop the mill right away to avoid the clasping axle. Meanwhile check the oil mass, temperature on lubricant housings. Add the oil at regular time.

(7). Stop the ore feeding before stopping the ball mill. Stop the water supply after the concentrate ore in the mill is processed. Press the stop button and pull down the electric break.

(8). Pull down the disconnecting link and press the stop button to stop ore feeding and water supply when the power fails without giving notice.

(9). Clean the equipment and keep the environmental sanitation after stopping the car. Make sure the civilized production.

2. Attendance Instruction:

(1).The operation and maintenance personnel of the ball mill should master the structural behavior of the equipment and the name, specification, function of every section.

(2). The operator should keep to the “four set” principle. Lubricate according to the notes on the lubrication chart. The use of the raw waste oil is forbidden. Keep the lubricating point clean.

(3). Keep the bearing temperature lower than 60 centigrade degree. Check the bolts and make sure they are tight and there is no abnormal sound. Check and make sure the ore feed and the water supply both are constant, the barrel doesn’t leak, the electric motor current and voltage are in normal condition, and the shield in the transmission part is in good order.

(4). Keep the facility environment clean. Other parts need to be disposed anytime apart from the operation part.

3. Maintenance Instruction:

(1). Repair cycle:

A. a month for fine repair

B. one to three months for minor repair

C. twelve to twenty four months for medium repair

D. sixty to one hundred and twenty months for heavy repair

(2). Repair content:

A. fine repair: mainly check the oil mass, adjust the gap between sections, enhance the bolts, change individual lining plate or check the wear pattern of the lining plate, and repair the feeder.

B. minor repair: check the wear pattern of the cleaning & measurement tooth surface and the lining plate, and change it when necessary.

C. medium repair: change the feeding parts, the transmission pinion and the bearing; disassemble and check the speed reducer; adjust the gear after its operation of 3-5 years and measure the hollow shaft after its operation of 3-5 years.

D. heavy repair: disassemble, check, clean, and measure all parts of the ball mill; repair or change the gear, hollow shaft, sphere tile, transmission shaft, pinion, and barrel according to the wear pattern; repair and change the electric appliance, and after the heavy repair to the electric appliance, the experimental operation and the acceptance check must be done.

The ideal jaw crusher to suit your needs

The Meaning and Significance of Material Crushing

Material crushing is a process to make the particle size of the material become smaller and smaller, it is the combination of crushing and grinding. Mechanical equipments used in breaking process mainly are gyratory crusher, cone crusher, jaw crusher . grinding equipment mainly are the ball mill, the rod mill, cement ball mill and energy saving ball mill. Generally speaking, material crushing in the universe is a common phenomenon, from the Big Bang, the mountains falling and the earth splitting, rock weathering, to atomic splitting, none of them are not material crushing process.

The status of material crushing in the national economy

The technology of material crushing has a history of at least hundreds of thousand years. In ancient times, people invented pestle, roller, rubber, mill and many other crushing tools which are still in use sometimes in modern life. It is not until 1858 Blake invented the pendulum jaw crusher that material crushing becomes an important industrial producing process.

The status of material crushing in the national economy

In fact, people is with material crushing everywhere no matter in production or in daily life. According to reports,the total materials crushed by us in one year is 10 to the power of ten tons. Material crushing technology is widely used in metallurgy, coal, building materials, chemical, energy, transportation, ceramics, medicine, food processing,national defense construction, agriculture, forestry and many other industries and sectors.

Stone crushing plant

Material crushing is a process of high energy consumption, high iron consumption and low efficiency. According to statistics,in many countries around the world, the consumption of electrical energy by crushing process takes up about 4% ~ 5% of the total power. In grinding mills, energy consumpt by crushing accounted for about 40%~70% of the entire energy consumption, with a high a rate, we can see that their status is so important.

The task of material crushing is to meet the urgent requirements of national economy in many aspects, like material quantity, size, particle size distribution, dissociation degrees, material structure, surface chemical and physical properties and others. In the 1970s, in order to satisfy the growing quantity demand for crushing products, the size of a crusher is larger and larger,nowadays,Bebon’s largest crushing equipments are 2283*2000 jaw crusher , 4600*3300 cone crusher.

The first Lokotrack with Barmac VSI on board

Overview of ball mill:

Ball mill grinds material by rotating a cylinder with steel grinding balls, causing the balls to fall back into the cylinder and onto the material to be ground. The rotation is usually between 4 to 20 revolutions per minute, depending upon the diameter of the mill .The larger the diameter, the slower the rotation. If the peripheral speed of the mill is too great, it begins to act like a centrifuge and the balls do not fall back, but stay on the perimeter of the mill. The point where the mill becomes a centrifuge is called the “Critical Speed”, and ball mills usually operate at 65% to 75% of the critical speed.

Ball Mill Application:

Ball mill are generally used to grind material 1/4 inch and finer, down to the particle size of 20 to 75 microns. To achieve a reasonable efficiency with ball mills, they must be operated in a closed system, with oversize material continuously being recirculated back into the mill to be reduced.

Various classifiers, such as screens, spiral classifiers, cyclones and air classifiers are used for classifying the discharge from ball mills. Ball mill is an efficient tool for grinding many materials into fine powder. The ball mill is used to grind many kinds of mine and other materials, or to select the mine. It is widely used in building material, chemical industry, etc. There are two ways of grinding: the dry process and the wet process. It can be divided into tabular type and flowing type according to different forms of discharging material.

Ball Mill Features:

1) It is an efficient tool for grinding many materials into fine powder.

2) The ball mill is used to grind many kinds of mine and other materials, or to select the mine

3) Ball mill is widely used in building material, and chemical industry gold washing equipment for sale.

4) There are two ways of grinding: the dry way and the wet way.

5) Ball mill can be divided into tabular type and flowing type according to different expelling mine

6) To use the ball mill, the material to be ground is loaded into the neoprene barrel that contains grinding media.

7) As the barrel rotates, the material is crushed between the individual pieces of grinding media that mix and crush the product into fine powder over a period of several hours.

The longer the ball mill runs, the finer the powder will be.

9) Ultimate particle size depends entirely on how hard the material you’re grinding is, and the time how long the ball mill runs.

10) Our ball mills have been used to grind glass, powder food products, create custom varnishes, make ceramic glaze, powder various chemicals.

11) Completely enclosed welded design in high-grade steel.

- Direct drive via bearing journal with top-mounted gearbox.

Motor connected to gearbox via a V-belt drive.

- Product discharge via slots located around the periphery of the drum.

Ball mill Working Principle:

The ball millis a horizontal rotating device transmitted by the outer gear. The materials are transferred to the grinding chamber through the quill shaft uniformly. There are ladder liner and ripple liner and different specifications of steel balls in the chamber. The centrifugal force caused by rotation of barrel brings the steel balls to a certain height and impact and grind the materials. The ground materials are discharged through the discharging board thus the grinding process is finished.

The development and characterization of a ball mill for mechanical alloying

Ball Milling equipment Abstract

Ball milling has been used to produce fine particles from a coarse feed for an extended period of time. Traditional powder metallurgy uses various types of ball mills to produce fine material powders by the pulverization of the starting materials. However, in a traditional ball mill, the energy exchange between the tumbling balls themselves and the powder particles tends to be chaotic.

Chaotic ball motion and insufficient and uncontrolled grinding of the powders characterize this process. In order to obtain a homogeneous and reproducible product, good control of the milling process, in particular control of the ball movement, is essential. For this goal, we report on the development and the characterization of a ball mill for use in mechanical alloying. In this design, a magnetic field is introduced to the ball mill. Various modes of a controllable and reproducible operation may be obtained through the adjustment of the applied magnetic field. The improved ball mill used here has a cylindrical chamber 12.5 cm in diameter and 8.75 cm wide. It is shown that the control of the ball motion during the milling of limestone leads to a reduction in grinding energy of 40% and a more homogeneous product.

BALL MILL INTRODUCTION

The mechanical alloying process was developed over thirty years ago for the production of Oxide Dispersion Superalloys [2]. Many types of milling devices are used for mechanical alloying [3]. Each type has limitations in terms of the specific needs of the mechanical alloying process. These limitations became more obvious when it was found that the product quality depends on the type of the milling device and the energy consumed in the grinding process [3,4].

In the size reduction process of hard rock, a specific design of liner and lifter is used to control the grinding media movement and improve the comminution performance. In the mechanical alloying process, the liner and lifter are not commonly applied. This paper describes the design and characterization of an improved ball mill in which the ball movement can be controlled by using external gold washing plants for sale

magnets. This improved ball mill provides the impact energy of the attritor mill and the powder mixing of the rotating mill [3] and has been tested in terms of particle size reduction and energy consumed in the grinding of limestone.

DESCRIPTION OF THE IMPROVED BALL MILL

The improved ball mill shown in the exploded view of Figure 1 has a cylindrical chamber 12.5 cm in diameter and 8.75 cm wide made from paramagnetic austenitic stainless steel and is connected to a motor through a bearing block, pulley and a belt. The motor speed is variable. A number of hardened ferromagnetic stainless steel balls, 1.25 cm in diameter, are used as grinding media. An adjustable magnet holder is connected to the base plate. Standoff adjusting screws are fixed on the magnet holder to permit the adjustment

of the distance between the outer periphery of the mill and the magnet positions. The face of the mill is made of Plexiglas® to permit the monitoring of the ball movement while adjusting the magnetic field for each mode of operation of the improved ball mill. The critical speed of the mill was found to be 126 RPM.

Ball mills overview

BALL MILL MODES OF OPERATION

The above picture shows the possible modes of operation of the improved ball mill. For each mode of operation, the ball movements during the milling process are confined to the vertical plane by the mill chamber walls and by the applied external magnetic field. The strength and direction of the magnetic field are adjusted externally by repositioning the magnets. The trajectories of the balls are controllable and  reproducible for each mode of operation in this design. The general patterns of the ball movement are a function of the magnet positions and the rotational speed of the mill. In Case A (Figure 2) the mill operates in the conventional mode of operation; no magnetic field is introduced to the mill. After a number of revolutions, the trajectories of the individual balls are quite chaotic. In Case B (Figure 2) the introduction of a magnetic field to the ball mill now controls the trajectories of the balls.

By moving the magnet away from or nearer to the mill, different attractive forces can be generated. This dramatically affects the ball movement

pattern. In Case B (Figure 2) the two magnets positioned at the bottom of the mill result in a characteristic change in ball movement and split the balls into two groups with the ball rotation in each group being in opposite directions. Case C (Figure 2) can be obtained by reducing the mill rotational speed or by reducing the strength of the magnetic field; the balls both rotate and oscillate around the

equilibrium position at the bottom.

Further reduction of the magnetic field strength creates the ball movement characteristic of Case D (Figure 2). The cluster-like assembly creates a sliding movement that rotates and oscillates up and down the arc of the cylindrical chamber and generates a shearing action between the balls and the inner mill wall. Case E (Figure 2) shows an arrangement of three magnets configured to produce a closed geometry magnetic field. It causes the ball trajectories to be more uniform and makes the balls fall as projectiles. The falling balls hit the balls rotating in the opposite direction at the bottom; consequently, strong impact collisions occur and a shearing action is created between the colliding balls. The unique feature of this design of ball mill is that the specific ball movement pattern in every case of operation is well defined and highly reproducible. This contrasts with the chaotic and unpredictable ball movement characteristic of other ball milling devices.

The Australian Coal Industry – Coal Preparation

Test process of gravity separation in ore beneficiation

In the study for the washability of gravity separation, the main task is to select and decide the process flow and the corresponding separation equipment.

Normally  the test process is  decided according to ore properties and practice that referenced to similar ore production,it should be more flexible than production process  because there are so many specific issues will be determined after test ,examination and contrast,such as selected granularity,Lost tail granularity and middlings processing method.The following are raw data needed for drawing up test process:

(1) Argillization and crushability of rock,which determines the necessity for washedore and sands sorting.

(2)Ore dilution rate

Ore dilution rate,which determines whether it is necessary for preselection by using heavy medium ore dressing, photoelectric dressing or hand dressing methods and discarding barren rock.

(3)Ore granularity crushing equipment south africa composition and metal distribution  rate in each granulometric level, which is especially important for placers,because in most washedores, useful minerals are mainly concentrated in the level of each intermediate  granularity.

(4)Ore embedded character, it determines the dressing method and the choice for process structure,including selected granularity, lost tail granularity, select sections, middlings processing methods, equipment combination and a series of basic problems.

5) In ore,properties and content of symbiotic heavy minerals and the mosaic relations with the main useful minerals,all of these decide the orientation of symbiotic heavy mineral in the gravity separation and processing method between rough concentrate and middling ore.

Terex Jaques SG1200 Gyratory Crushers

Terex is focused on its mission of delivering products that are reliable and cost effective and producing equipment that improves its customers’ return on invested capital. Terex has expanded dramatically in recent years, primarily through a series of acquisitions and divestures designed to expand the product offering, improve geographic coverage and deliver value for Terex customers.

Terex is building a franchise under the Terex brand name. As part of that effort, Terex is migrating the historic brand names for many of its products to the Terex brand, including in some cases using the historic brand name in conjunction with the Terex brand for a transitional period of time. Terex products are currently marketed principally under the Terex brand name and the following historic brand names, including in some cases the use of the Terex name in conjunction with these historic brand names: Advance, American, American Truck Company, Amida, ATC, Atlas, Bartell, Bendini, Benford, Bid-Well, Canica, Cedarapids, CMI, CMI-Cifali, CMI Johnson-Ross, Comedil, Demag, ELJay, Fermec, Finlay, Franna, Fuchs, Genie, Hi-Ranger, Jaques, Load King, Morrison, O&K, Pegson, Peiner, Powerscreen, PPM, Reedrill, Schaeff, Simplicity, Standard Havens, Tatra, Telelect, TerexLift and Unit Rig.

Terex mining machinery

1995: Terex acquires PPM Cranes.

1996: Terex divests Clark Material Handling used rock crushing for sale in south africa.

1997: Terex acquires Simon-RO and Telelect. BPI Handlers in Baraga, Michigan is also acquired this year.

1998: Terex grows their mining business with the acquisitions of Payhauler and O&K Mining. The crane offering also grows dramatically with the acquisitions of American Crane, TerexLift, Peiner and Gru Comedil.

1999: Terex builds a Light Construction business through the acquisitions of Amida, Benford and Bartell; and becomes a leader in the crushing and screening industry with the acquisitions of Cedarapids, Re-Tech, Powerscreen, BL Pegson and Finlay. Crane manufacturers added to Terex this year included Franna, Princeton and Kooi.

2000: Terex moves into the Compact Equipment category with the acquisitions of Fermec, a manufacturer of tractor loader backhoes. Coleman Engineering is also acquired, adding to the Light Construction business. The company divests Moffett, Princeton and Kooi.

2001: Terex continues to build the Roadbuilding business with the acquisitions of Jaques, CMI, Bid-Well and Load King. The Atlas acquisition is also completed this year.

2002: Several acquisitions help to position Terex as a leader in their respective categories. Demag fills out the Terex Cranes product offering and makes Terex a leading crane company. Genie is a leading manufacturer of Aerial Work Platforms. The acquisitions of German manufacturers Schaeff and Fuchs make Terex a powerhouse in the Compact Equipment category. Advance Mixer puts Terex in the concrete mixer business. Finally, the acquisitions of Pacific Utility and EPAC provide company-owned distribution for Terex Utilities.

2003: Terex acquires controlling interest in TATRA, manufacturer of on/off-road heavy-duty vehicles for commercial and military applications. The Company continued to expand its company-owned Terex Utilities distribution with the acquisition of Commercial Body and Combatel.

2004: Terex acquires Noble CE, now known as Terex Mexico, which manufactures high capacity surface mining trucks and fabricates components for other Terex businesses. Terex also acquires Reedrill, a manufacturer of surface drilling equipment for use in the mining, construction and utility industries.

Terex CobraTrack Track Mounted Jaw Crusher

JAW CRUSHER

High strength, proven durability and easy maintenance means more uptime and increased production. Full-sized jaw crusher. TEREX | Cedarapids doesn’t shorten the jaw for plant mounting which is done by some in the industry.

Innovative new jaw crusher technology

Full 30″ x 42″ (762 x 1067 mm) feed opening (peak-to-peak)

High strength castings for strong but lightweight design

Durable heavy-duty base frame

Aggressive crushing chamber action

Operator friendly and easy to maintain

Hydraulic adjust for easy closed side setting changes

Patented stationary jaw die wedge system

Terex CUMMINS DIESEL ENGINE

The CobraTrack 1100 is powered by a Cummins QSL9 diesel engine. Rated at 299 hp, it has the power to handle any job second hand stone crushing for sale in SA.

Rated 299 horsepower (223 kW)

Fluid coupling for increased V-belt and engine life

Reliable cog belt design for pump drive

Lockable enclosure with access doors

Ground access 200 gallon fuel tank (757 L)

Federal EPA Tier 2 compliant

Easy access to all pumps and pump drives

Terex VIBRATING GRIZZLY FEEDER

This durable 4214-9 VGF provides optimum feed regulation, superior material separation and high production efficiency.

Aggressive 7/16″ (11.1 mm) stroke

Adjustable stroke angle

Deep formed steel side sheets

Durable high strength steel panable enclosure with access doors

Inverted tubular pan support weldment

ARS pan and side liners

Adjustable 60″ (1524 mm) long grizzly section

Self-relieving tapered grizzly bar prevents plugging

Double deck grizzly for fines/dirt removal

Hinged screen deck for easy access & cloth change

Terex DISCHARGE CONVEYOR

This removable 42″ (1067 mm) undercrusher discharge conveyor is built to last and is easily serviced and maintained.

All grease zerks at ground level

Direct drive hydraulic motor

Conveyor easily removes for servicing

Easily deployed ground supports

18″ (457 mm) clearance to jaw pitman

Full skirting to head pulley

Terex JAW CRUSHER DRIVE

The CobraTrack jaw crusher drive system incorporates advanced technology to automatically avoid damage.

Fluid coupling with operator controlled engage and disconnect

No friction clutch

Crusher can start at any engine speed

Soft start for crusher protects engine and drive from shock

Releases load automatically in overload condition

Thermal and pressure auto shutdown

Large oil cooler with bypass valve

10-groove 5V-belt design

Power band belts

Terex CobraTrack Track Mounted Jaw Crusher

The CobraTrack track mounted jaw crusher brings the industry’s best technology into one rugged, flexible, mobile plant. Greater flexibility, quicker setup and easier maintenance are huge CobraTrack advantages. TEREX | Cedarapids crushers are known for rugged construction, high productivity and a greater value for investment. Our customers know that they can depend on their equipment and the strongest distributor network in the industry.

Telsmith impact crushers

Jaw crushers

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Technologically advanced and innovative hydraulic hammers and breakers

It is reported that Talvivaara mine, located in Northern Finland, is today the biggest sulfide nickel ore mine in Europe. In close cooperation with Metso, and with crusher cavity optimization, Talvivaara recently boosted its primary crushing capacity annually by up to 3.5 million tonnes.

An open pit nickel deposit with 0.22% average content, Talvivaara is a mine of many superlatives. Today, about 22 million tonnes of nickel ore is excavated at the mine annually. Using Bioheapleaching, the mine currently produces 30,000 tonnes of metallic nickel per year.

After huge, up to 300,000 tonnes blasts, the feed material is dumped into the primary gyratory crusher and then transported along a more than two kilometer long conveyor to the secondary and tertiary crushing stages. After activating the ore, Bioheapleaching of the ≤8mm ore takes place in four piles, each 400 x 1200 meters in size. The natural bacteria are used to extract the nickel out of the ore.

The nickel ore in Talvivaara is hidden inside black schist, which is extremely slippery material to crush. Already the first crushing test indicated that normal capacities would not be easily achievable.

After installing the huge 60 x 89 inch primary gyratory crusher, it immediately became apparent that the capacity would fall far behind the planned capacities. For the total mine economy, this presented a real challenge.

Mr Erkki Kärkkäinen manager of materials handling at Talvivaara mine said that “Our main problem was caused by the profile of the original crusher wear mantle. Its cavity was not the right one for processing slippery ore, and it caused the feed material to jump up from the cavity, thus decreasing the capacity. Throughout the entire development process, our cooperation has been very open and honest.”

In order to quickly find a solution to the primary crusher cavity issue, Talvivaara contacted Metso’s crusher wear parts specialists at the Tampere office in Finland. The task presented was to find a cavity that can better process the slippery ore and guarantee the capacities required for the mine economy.

Mr Jyrki Lahenius department engineer ore processing at Talvivaara said that “Actually, we studied all of our crushing related parameters with Metso in order to find the right solution. Throughout the entire development process, our cooperation has been very open and honest.”

After several meetings, using Metso’s crusher cavity optimization process know how, including 3D mantle design tools, the right angle for the mantle cavity was found, and the suitable manganese type selected. Metso’s Tampere foundry casted the huge, two piece wear mantles in the spring of 2010.

Bioheapleaching extracts the nickel ore from the ore, resulting in a bright green liquid, several million liters of which is pumped daily during the leaching process. In May of 2010, the Metso mantles and outer wear parts were installed into the primary gyratory. After crushing for 8 months, the results are quite positive. The primary crushing capacity has increased by an average of 15%.

Given as a percentage, the increase sounds quite modest. However, when calculating the annual capacity increase, Erkki Kärkkäinen ends up with a figure of 3.5 million tons of extra capacity. In terms of hourly capacities, the primary gyratory’s original capacity during test drive was under 3,000 tonnes and, after installing the Metso wear parts, it is about 3,500 tonnes per hour.

Mr Kärkkäinen said that “I believe that with more efficient feeding, we can achieve a continuous production that exceeds 3,000 tons per hour. We currently feed the crusher using big Hitachi dump trucks, dumping 150 tons of ore into the crusher every 2.5 minutes.”

Surface Mining and Bulk Handling Equipment

The xc4R780 2414 series super tight Raymond mill, is this year’s new products, this series equipment technological features and principle were introduced, on stage jointly with the personage inside course of study of ultra-fine powder processing new method, new technology.

Raymond mill problems

Raymond Mill

Raymond mill

is a non-metallic mineral processing – one important preparation, because of its stable performance, strong adaptability, cost-effective, since the traditional Raymond mill was introduced to China by 20a, has been popularized and applied to non-metallic minerals processing, by the majority of mineral processing enterprises are familiar with, in the domestic non-metallic

Processing industry has a considerable quantity, is the ideal mineral processing equipment. But, as in recent years of non-metallic mineral products development, downstream enterprises of non metallic mineral products of the increasingly high demand, especially for the product fineness higher requirements.

Xc4R780 2414 type superfine Raymond mill process characteristics

According to our many years of the ultra-fine powder processing technology, the above problems take ‘ wide sweeping technological innovation, transformation, through repeated actual use, now Our designs form new Raymond xc4R9 series models.

To conform to the current development needs, to adapt to the production of ultrafine powder products. Low energy consumption, high efficiency, no pollution, stable mechanical performance, more durable, simple operation, convenient. Products in low, high economic benefit, ultra-fine powder processing equipment towel is a leader, more modern powder processing enterprises dream and realize one’s ambition lay a good helper, she will accelerate the pace of non metallic minerals used.

Superfine Raymond mill structure design features

Traditional Raymond mill product fineness in general 325 head to head between 400, we use the traditional Raymond mill the discovery in the process, Raymond Mill in processing calcite powder is 325 mesh, coarse powder containing a large amount of 10 um ultra-fine products, such as the separation of utilization and increase its production capacity, economic benefits is o values.

Raymond mill working problems

As the factory make its product grades, we in the actual use of 4R3216, 3R2114 traditional Raymond mill process, repeated the study, analysis and improvement, in its structure to do a larger change, such as: the host drive method is improved.

On the spindle and Ning ten frame cantilever was beneficial for the stability of the structure transformation, make its smooth running, center swing; the analysis of machine transmission part comprises a cavity supporting type, instead of hanging outside the cavity transmission rotary two isolation, enhances its working stability, durability.

In the crush zone to be partial, grinding material always gathered in the research are crushed bandit effectively processing, improving the grinding efficiency; latch roller structure to thoroughly transform, the grinding roller and the grinding roller shaft can be complementary operation in rotation. At the same time, also in the revolution.

Streamlined Rules and Reduced Fees for Rock Crushing Plants

Stone primary crushing operation

This module describes basic job steps, potential hazards and accidents, and recommended safe job procedures for primary crushing operations.

This job is normally done by the crusher operator, but may be done by other occupations. Crusher operators must protect themselves, and other people in the area, from accidents and injuries resulting from operation of the crusher and associated equipment. There are several different types of primary crushers, however, there are many similarities in the job procedures followed by crusher operators. Crushing is the first step in converting shot rock into usable products. Essentially, crushing is no more than taking large rocks and reducing them to small pieces. Crushing is sometimes continued until only fines remain.

At some operations, all the crushing is accomplished in one step, by a primary crusher. At other operations, crushing is done in two or three steps, with a primary crusher that is followed by a secondary crusher, and sometimes a tertiary crusher. Raw material, of various sizes, is brought to the primary crusher by rear-dump haul units, or carried by a wheel front-end loader. Primary crushing reduces this run-of-mine rock to a more manageable size. The different types of primary crushers are: jaw crusher s, gyratory crushers, impact crushers, and autogenous crushers.

jaw crusher

JAW CRUSHER

The jaw crusher squeezes rock between two surfaces, one of which opens and closes like a jaw. Rock enters the jaw crusher from the top. Pieces of rock, that are larger than the opening at the bottom of the jaw, lodge between the two metal plates of the jaw. The opening and closing action of the movable jaw against the fixed jaw continues to reduce the size of lodged pieces of rock until the pieces are small enough to fall through the opening at the bottom of the jaw.

gyratory crusher

A gyratory crusher breaks rock by squeezing the rock between an eccentrically gyrating spindle, which is covered by a wear resistant mantle, and the enclosing concave hopper. As run-of-mine rock enters the top of the gyratory crusher, it becomes wedged and squeezed between the mantle and hopper. Large pieces of ore are broken once, and then fall to a lower position (because they are now smaller) where they are broken again. This process continues until the pieces are small enough to fall through the narrow opening at the bottom of the crusher.

impact crusher

Impact crushers, which are also called hammer mills, break rock by impacting the rock with hammers that swing on a rotating shaft. The practical use of impact crushers is limited to soft materials, such as phosphate, gypsum, weathered shales, etc. Impact crushers cannot handle as large a top sized material as jaw, or gyratory, crushers can; however, impact crushers can make a finer sized product.

AUTOGENOUS CRUSHER

In recent years, autogenous crushers have been adapted for crushing run-of-mine rock in primary crushing circuits. Consequently, autogenous mills have increased in importance as a means of crushing and grinding. In autogenous crushers, the rock to be crushed also provides the crushing force. Crushing is accomplished by the tumbling action of the rock. Flexible crushing circuits can be constructed so that hard ores, as well as soft ores, can be processed. Wet, sticky ores can be processed in autogenous mills, while the same ore would present difficulties for other types of crushers.

TRAINING RECOMMENDATIONS

Primary crushers

On-the-job training is usually best done by the employee’s immediate supervisor. If the supervisor relies on another employee to do certain parts of the training, the supervisor should be present to monitor the training. OJT is conducted at the actual job site, where the work will be done.

The supervisor/trainer should use the training materials (this module, or other materials) while the training is being done, to help ensure that all job steps are covered, and that no important safety precautions are omitted. Effective OJT should begin with an explanation (lecture and/or discussion) of the safe job procedure. The explanation should be followed by a hands-on demonstration of the proper job procedure. A good demonstration is, perhaps, the most important part of OJT. The demonstration is followed by supervised practice, during which the supervisor/trainer coaches (corrects and encourages) the employee, and evaluates when the employee is ready to do the job without direct supervision.

The first step -explaining the job to the employee -can be done in different ways. The supervisor/trainer and the employee can sit down and go through the training materials together. It may be advantageous to provide the employee with a copy of the training modules that are applicable to his/her job. The fact that most of the training is conducted at the job site does not preclude the use of a classroom, or a quiet office, for the first part of the training. Any general theory, or knowledge training, as well as the initial explanation of the job procedure, may be best done in an office/classroom setting; especially when noise levels, or other conditions at the job site, make communication difficult. A complete series of job steps could be presented through the use of slides developed at the mining operation.

Stone crushing operations

Mongolia is a landlocked country and it’s located in the north of Mongolian Plateau (Average elevation 1600 meters).

In the west and north, it’s mountainous region which comprise Altai Mountains, Khangai Range, Tangnu Urals, the East Sayan Ridge, Gobi Altai Mountains, Kent mountains.

The main peaks of the mountain ranges are generally more than 3,000 meters above sea level. Mountain graben formed the water system, lakes and basins between mountains. Selenge River and Orkhon River and its tributaries are the main rivers in Mongolia. South-east is plateau which is relatively flat. There are lots of low hills and shallow basins there, and the surface is mainly coarse sand, gravel, “Gobi. ” Gobi region share about 1/3 of the country’s total areas.

The discoverd mineral reserves are more than 80 kinds, such as copper, molybdenum, gold, silver, uranium, lead ,zinc, rare earth, iron, fluorite, phosphate, coal, oil etc. Among them, the coal minerals reserves are about 50 to 152 billions tons, iron ores 2 billion tons, phosphate 200 million tons and fluorite more than 8 million tons. And other minerals and ores are abundant too. The copper and molybdenum minerals in Erdenet are one of the ten biggest copper and molybdenum minerals in the world, rank first in Asia. Since 1995, the Mongolian gold mining industry has become the fastest growing industry.

Though the mineral reserves in Mongolia are very plentful, the mining and processing industry is underdeveloped. And mining is one of the key industry in Mongolia. Mining industry is various. Extracting minerals for industry, quarrying stones and rocks for construction are all mining. The transport in Mongolia are mainly railyway and highway.

Shanghai crusher mining and construction machinery company is one of the best mining machienry manufacturers and exporters in the world. These years, Mongolia has been one of the our biggest clients. We produce kinds of crusher and grinders and export to Mongolia. The crushing and mining tools are extensively applied in mining and construction of highway and railway. Highway is very important to Mongolia and the crushing plants can help with the highway constrution. The stone crushing plant and sand making plant is for construction aggregate, sand, and gravel. These aggregates are important building material.

Among the minerals crushing plant, copper crushing plant, and gold crushing plant are very popular in Mongolia. The coal crushing plant produce the mainly energy resource of Mongolia. And iron crushing plants, fluorite crushing plants, rare earth grinding plants have made a significant achivement for the industry and export departments. Ulan Bator is the captain of Mongolia, the industrial, political, economic and cultural center. It’s industry leads the one of the country, and crusher grinding mills such as ball mill, roller mill, do help a lot.

These years, the tradement between crusher and Mongolia develop steadily. Now days, the volume of trade can reach 1 million dollars. With the development of society, we will help with building a developed Mongolia. The best quality, the best service for you.

Stone crusher running and installation

Perturbed with frequent monetary demands and intimidation from various pressure groups the stone crushers from Mantripukhri to Kanglatombi staged a sit in protest demonstration at Khonghampat today.

The protest was organized by the Northern valley stone crusher owner`™s Welfare Association, Pheidinga an apex body of 47 stone crushers functioning from Mantripukhri to Kanglatombi. 3000 plus laborers, men and women, from the 47 stone crushing units along the National Highway 39 between Mantripukhri to Sekmai stretch came out in the open to protest against the unbearable extortion and subsequent kidnapping or intimidation from underground outfits.

A member of the association stated that the monetary demands from various groups have made their lifes miserable.

Further it has been reported that a huge amount of monetary demand have been imposed by 14 splinter groups of a militant organizations.

The labourers recalled that in 2009 four person including a driver was kidnapped for monetary demands by some pressure groups and asserted that recently on April 11 two persons of the stone crusher community was released after being held captive for several days for a similar issue.

The protestors during the demonstration displayed various placards which read, `We oppose monetary demand` `one faction one demand, fourteen factions fourteen demands` `Don`™t imposed unbearable demand` `Many faction, more confusion` etc.

In the meantime, a memorandum was also submitted to the Chief Minister of Manipur drawing his intervention.

In the memorandum the association asked to Chief Minister to provide protection for the labourers from various anti social elements and activities like monetary demands, threat/arrest from both the non state and state actors.

The stone crushers further demanded for exercising ROP from Sekmai Quarry to Keithelmanbi Quary on regular basis and at the same time to stop irrelevant money demand by the state forces from the Tata truck who supplies the raw material to the unit.

The tax collection from non state actors and also from state machineries if persist the stone crushers will become bankrupt.

Stone crusher dust as a fine aggregate in concrete for paving blocks

Abstract of stone crusher dust

Concrete paving blocks are ideal materials on the footpaths for easy laying, better look and finish. In this paper, a parametric experimental study for producing paving blocks using crusher dust is presented. Some of the physical and mechanical properties of paving blocks with fine aggregate (sand) replaced by various percentages of crusher dust are investigated.

Stone Crusher Dust Plant

The test results shows that the replacement fine aggregate by crusher dust up to 50% by weight has a negligible effect on the reduction of any physical and mechanical properties while there is a saving of 56% of money. The percentage of saving was less but highly beneficial for mass production of paving blocks. The shaving would be more if the sand availability is at a greater distance. This also reduces the burden of dumping crusher dust on earth which reduces environmental pollution.

Concrete introduction

A lot of facelift is being is given to roads, footpaths along with roadside. Concrete paving blocks are ideal materials on the footpaths for easy laying, better look and finish. Cement concrete paving blocks are precast solid products made out of cement concrete. The product is made in various sizes and shapes viz. rectangular, square, and round blocks of different dimensions with designs for interlocking of adjacent paving blocks.

The raw materials require for manufactures of the product are Portland cement and aggregates which are available locally in every part of the country. Market potential cement concretes paving blocks find applications in pavements, footpaths, gardens, passengers waiting sheds, busstops, industry and other public places. The product is commonly used in urban areas for the above applications. Hence, the unit may be set up in urban and semiurban areas, near the market.

A concrete mix of 1:2:4 (cement: sand: stone chips) by volume may be used for cement concrete paving blocks with water to cement ratio of 0.60. The concrete mix should not be richer than 1:6 by volume of cement to combined aggregates before mixing. Fineness modules of combined aggregates should be in the range of 3.6 to 4.0. All the raw materials are placed in a concrete mixer is rotated for 15 minutes.

Till now Indian standard has not given any specification on cement concrete paving blocks. However, the specification laid down in IS 2185 (Part1) specification for concrete masonry units: Part 1 for Hollow and solid concrete blocks, may be used as general guidelines for meeting the quality parameters. Quality parameters like actual proportion of the individual raw materials, ratio of coarse aggregates to fine aggregates, water to cement ratio, good finish, accuracy in size and shape, and compression strength after curing are the some of the important parameters that should be checked periodically to ensure good quality of the product.

Raman et al., 2005 studied the effect of quarry dust and found that the partial replacement of river sand with quarry dust without the inclusion of fly ash resulted in a reduction in the compressive strength of concrete specimen. It has also been reported that the reduction in the compressive strength of quarry dust concrete was compensated by the inclusion of fly as into the concrete mix. Reddy and Reddy, 2007 reported an increasing compressive strength by use of rock flour as fine aggregate instead of river sand. Ilangovana et al., 2008 reported strength of quarry rock dust concrete was comparably 1012 % more than that of similar mix of conventional concrete.

Hameed and Sekar, 2009 studied effect of crushed stone dust as fine sand and found the flexural strength increases than the concrete with natural sand but the values decreases as percentage of crusher dust increases. It has been reported by Reddy and Reddy, 2007 from their experimental study on use of rock flow and insulator ceramic scrap in concrete that the rock flow when used as fine aggregate increases the modulus of rapture thus the flexural strength. From the study of green concrete posses containing quarry dust and marble sludge powder it has been reported that the split tensile strength of green concrete was 14.62% higher at 7days and 8.66 %higher at 28 days. But split tensile strength was found to be lesser by 10.41% at 3 days than controlled concrete.

Hameed and Sekar, 2009 also reported the resistance of Green concrete containing crusher dust against sulfate attack (Mg SO4 and Na2SO4 ) is higher than the conventional concrete. Also they have reported acid resistance ( H2SO4 ) is higher than the conventional concrete. The durability of quarry rock dust concrete under sulphate and acid action is higher than the conventional concret.

Similarly water Absorption found to be more in the concrete containing crusher dust 2 . The overall workability value of quarry rock dust concrete in terms of slump as well as compaction factor was less in comparison to conventional concrete(Ilangovana et al., 2008). As reported by (Hameed and Sekar, 2009) the slump value increases (Workability increases), if concrete is mixed with quarry dust as well as marble sludge due to presence of marble sludge powder

Conclusion

Replacement fine aggregate by crusher dust up to 50% by weight has a negligible effect on the reduction of any physical and mechanical properties like compressive strength, flexural strength, split tensile strength etc. Water absorption is well below the limit as per Indian codes. Durability test shows no variation for different replacements of crusher dust. There is a shaving of 56% of money if sand is replaced by crusher dust. The percentage of saving was less but highly beneficial for mass production of paving blocks. The shaving would be more if the sand availability is at greater distance like hilly area. This also reduces the burden of dumping crusher dust on earth and hence environmental pollution.

Spain marble process, Spain mining equipment

A complete gravel processing and loading plant with a processing and loading capacity of 9000 tph at Hülskens Liebersee GmbH Y Co. KG in Germany. Two of the largest screens with double out-of-balance drives for gravel (screen are 3,300 x 6,000 mm) are installed in the gravel and sand separation plant. The plant also has a double-toggle jaw crusher as primary crusher and two Kubria® cone crushers in the gravel sector. The whole plant is electronically controlled right down to the print-out of individual weighbridge tickets for the trucks.

Stationary Plants

ThyssenKrupp builds and installs turnkey processing plants form stationary primary crusher plants, complete gravel preparation plants right up to hardrock processing plants with all components.

The planning of a completely new plant for aggregate, cement, lime and gypsum industries is taken care of by teams of long-time specialists. They lay down the required process techniques, design and manufacture the machinery and components and then install, erect and commission the complete plant. That’s the reason why ThyssenKrupp plants bring a maximum of performance and return with a minimum of maintenance and operating costs.

Stationary crusher of jaw, cone, impact, VSI type is designed to optimize the performance-quality-price relationship for even the hardest job. The fleet is from large primary jaws and impactors to cones and VSIs for tertiary and quaternary finishing.

Stationary crusher of jaw, cone, impact, VSI type is designed to optimize the performance-quality-price relationship for even the hardest job. The fleet is from large primary jaws and impactors to cones and VSIs for tertiary and quaternary finishing.

crusher Machinery manufactures a full line of crushing equipment for use in processing quarried stone, rocks, aggregate, raw mining minerals, recycled broken concrete etc. Stationary, portable, mobile crushing plant is available to meet your material reduction requirements. We also supply the turnkey crushing plant of different capacities for the clients.

South Africa Mining

SOLUTIONS FOR THE CEMENT INDUSTRY

Castolin Eutectic is your resource for protection, wear and joining solutions. We believe in working with our customers to find the best answers to their problems. Expert in wear problems we can provide solutions for:

• Manufacture of new finished and semi-finished wear parts.

• Repair of broken parts

• Rebuilding of worn parts

• Protection against wear and corrosion

• Fusion technology

For protection against high-temperature corrosion, Castolin Eutectic typically recommends very high-chromium content nickel-based alloys, usually supplied in the form of a Eutalloy® powder and deposited by flame spraying. These alloys are then fused to increase the bond strength of the coating to the substrate to remove all «open» porosity. This creates a very dense, homogeneous coating which provides maximum resistance to corrosion. The discrete «closed» pores block any penetration of corrosion through to the substrate.

ROLLER PRESS

Compared with traditional jaw, conical or ball mill crushers, roller crushers provide up to 30 % energy savings, reduced working noise levels and 30 % to 100 % increased production output. Roller Presses crush various materials such as clinker, limestone, minerals, clays etc. by compression between two rollers but they are subject to high stress abrasion and wear. Consequently, the roller surface is often weld hardfaced to increase the lifetime. In France, a cement plant operating a Roller Press experienced 3-4 months roller lifetime using the traditional 4-6 layer weld overlay approach due to premature spalling of the brittle weld deposit (see photo).

New Castolin Eutectic Plasma Technology solution

Plasma Transferred Arc is a Modern Hybrid welding wearfacing process using powder and a plasma source. To improve the wear life, the extremely wear resistant tungsten carbides material in powder form was used in a special matrix, EuTroLoy PG 6503. Two layers of powder alloy resulting in a total uniform coating thickness of 6 mm (see photos) applied by a specialised Castolin Eutectic subcontractor.

Result : After 16 months, wear was limited to 1mm with no sign of spalling and the cost of the job was lower than the former solution. In addition, productivity savings were generated by the increased service life of the PTA and EuTroLoy protected press rollers.

cement industry

CASTOLAB

We believe in making our extensive know-how fully available to our customers, but for situations where technology transfer is complex or requires a rapid turn-around, we have our own maintenance service workshops; CastoLabs.

These fully resourced skill centers develop advanced procedures for transfer to end-users. Castolin Eutectic CastoLabs are located in Germany, Belgium, Holland, Spain, Austria, Poland, Czech Republic and the United Kingdom, and are best contacted through Castolin Eutectic via our website (www.castolin.com). In countries without CastoLabs, Castolin Eutectic collaborates with approved workshops which are in close contact with Castolin Eutectic’s specialists and technologies.

Small Gravel Crusher

The fields of application of Sinter crusher

Specially-designed single roll crushers are used as sinter crushers for primary crushing in the iron and steel industry. Double roll crushers are particularly suited for secondary crushing. Furthermore they ensure a closely defined final grain size with only a small proportion of fine grain.

The feed materials of Sinter crusher

Lumps of hot and cold sinter or primary-crushed sinter in sintering plants.

The mode of operation: Sinter crusher

Sinter Crusher

The sinter cake of various sizes that are dependent on the sinter belt’s width, is fed into the crusher via

a feeding table while it is either still hot or already cooled. It is then primary crushed by the crushing teeth on the grizzly bar. For secondary crushing the cooled sinter is fed into the double roll crusher via vibrating feeder. While feeding the material is spread over the roll’s width. The roll’s diameter, the tooth form and the circumferential speed are adjusted to the type and the size of the sinter in relation to the required final grain size. One of the two crushing rolls is designed as a loose roll in order to influence the final grain size by adjusting the gap width and to compensate wear and tear.

The special characteristics

The primary sinter crusher is fitted with a directlydriven crushing roll with strong crushing teeth, a movable grizzly bar carrier and a housing with an integral mobile frame to facilitate maintenance. The feeding table, the crushing tools and the bars are protected against wear by hard-facing. The crushing roll is arranged onto the machine’s base frame. The crusher shaft made of high-grade steel is arranged on amply dimensioned spherical roller bearings, with the bearing housings protected against dust and dirt by lubricated labyrinths. The crushing roll is electro-mechanically driven via electric motor, couplings and gears or it is electrohydraulically driven.

The double roll crusher’s individually-driven crushing rolls consist of roller bodies, equipped with crushing rings or crushing shells made out of highly wear-resistant special cast. The crushing rolls shafts are located in strong steel cast housings with lubricated, amply dimensioned spherical roller bearings with low maintenance requirements. The crushing rolls are driven by electric motors with coupling and gears via V-belt. The base frame is equipped with a positioning device to facilitate maintenance.

The advantages of Sinter crusher

– Consistently high capacity

– Low susceptibility to operational problems

– Long life time of parts

– Simple replacement of wear and spare parts

– Low proportion of fine grain

– Gentle crushing method

Single Toggle Grease Type Jaw Crusher

Broomall, PA (February 6, 2007): Pennsylvania Crusher offers three models of single roll crushers: the Hercules, the Atlas, and the Type K. All have a roll assembly consisting of a roll shaft and a fabricated roll shell with integral fixed teeth which operates against a breaker plate. This produces three different methods of reduction: impact, shear and compression.

Applications for the these models include petroleum coke, gypsum, coal with rock,  aggregate, limestone, chemicals, phosphate rock, shale and many other minerals. These are crushed at low speeds and therefore tend to facture along natural cleavage lines, resulting in minimal fines.

Single roll crusher

Single roll crushers

have a low profile and are relatively compact, allowing them to easily fit into tight places such as beneath dump hoppers.

The Type K is best suited for the size reduction of coal, petroleum coke, and similar materials. The Hercules and Atlas models are for materials with higher compressive strengths. All three models may be choke-fed from hoppers or may be fed at continuous, controlled rates from vibratory screens, apron feeders or conveyor belts.

All three models have very large feed openings, enabling them to accept large slabs. The curvature of their breaker plates ensures that no large slabs of material can simply fall through the chamber without being crushed; all will be retained within the crushing chamber until crushed to the proper output size.

Their breaker plate assembly is formed by attaching curved, wear-resistant, steel breaker plates to a rugged frame formed of structural steel shapes. The roll assembly is fabricated as a single piece, with welded-on teeth. This eliminates any chance of the teeth coming loose from the roll and causing damage within the crushing chamber.

Foundation requirements for all models are minimal. Since all operate at low speeds, dynamic loads transmitted to the foundation are relatively low, making them relatively easy to mount at any level, on suitable concrete or steel structures. It also means that a massive supporting structure is not necessary.

Silica sand crushing plant equipment

Sand Crushing Introduction

Since the hydroelectric plant construction is very important, you should take consideration of the silica sand crushing machine quality including its performance reliability, technical advancement, and processing capacity. crusher silica sand crushers are adapted to silica stone properties, sand producing process requirements about output and product quality. We provide you with different style of sand crushing machines for each production phase while paying attention to sand crushers’ adaptability.

Silica sand crushing machine

jaw crusher for coarse silica sand crushing

Jaw crusher is a very common coarse silica sand crusher in most sand plants. crusher silica sand jaw crusher is the best choice for sand processing plant of small or medium scale as a result of its advantages such as low operation costs, simple installation and operation, and reliable operation. crusher silica sand jaw crusher can process raw materials whose compressive strength is under 320 Mpa. Its input size varies from 150 x 250 mm to 1200×1500 mm, and the output from 1 t/h to 1000 t/h.

crusher JC jaw crusher — the latest style has become the most popular products in the world for its better processing capacity. Please contact our online service for more details.

impact crusher used as coarse silica sand crusher or medium silica sand crusher

silica sand impact crusher can be used after jaw crusher for raw material further crushing, which can decrease crushing load of the following crushing phase and increase silica sand processing capacity.

crusher silica sand impact crusher is widely applied in silica sand production line for its high reduction ratio and crushing efficiency, good final product shape, easy maintenance and reliable operation. It can process materials whose compressive strength is under 360 Mpa. PFW series of silica sand impact crusher of European version is our company’s new hot product. The three-crush crusher has got worldwide favor and been exported to more than 120 countries.

cone crusher for medium silica sand crushing

Silica sand cone crusher is your good choice for hard materials crushing. Cone crusher is divided into single cylinder cone crusher and multiple cylinder cone crusher. Both two kinds of cone crusher are featured with good shaped product, low powder content, reliable operation and high crushing ratio.

silica sand crusher provides you with a large range of silica cone crushers to meet your sand plant requirements, such as PY series spring cone crusher, CS series spring cone crusher, and HCS cone crusher with high efficiency.

Vertical shaft crusher used as fine silica sand crusher and sand shaping machine

There are two kinds of silica sand crusher for common sand processing plant—vertical shaft crusher and roller crusher.

crusher vertical shaft crusher (sand making machine) is widely used in sand plant for its high efficiency, low cost, reliable operation and good shaped product. projects who requires high quality manufactured sand like hydroelectric central construction adopts usually vertical shaft crusher as its main silica sand fine crusher, and controls the sand fineness and powder content with roller crusher. The crusher vertical shaft crusher’s maximum feeding size ranges from 26 mm to 60 mm, and the processing capacity varies from 8 t/h to 360 t/h.

Sepro Mineral Systems – Mills, Scrubbers and Gravity Concentrators

The SEPOR Mini-jaw crusher is suitable for crushing small quantities of rock and other friable material, ranging in hardness from hard quartz to relatively soft claystone. It is available with a variety of wear surfaces:

Hardened steel alloy plates for users not concerned with iron contamination and 85% Alumina (Ceramic) for those who can not tolerate iron contamination.

A tungsten carbide model is also available, which is the hardest material of the three. The tungsten carbide contains 6% cobalt as a binder.

All jaw plates are interchangeable.

The feed opening is 2″ x 2″ with a maximum feed partical size of -1″ material. About 1/3 lb. per minute (20 pounds per hour) can be crushed to -1/8″ depending on the nature of the feed material. The size of the crushed product is adjustable by turning the handwheel, which adjusts the gap at the bottom of the jaws. The jaw opening range is from 1/4″ to 1/16″. However, the finer the crushed product, the lower the throughput.

A stainless steel tray collects the crushed sample. If cross sample contamination is of paramount importance, each sample may be caught on separate trays.



FEATURES

Motor: 1/4Hp 110/60Hz or 220/50Hz Bearings: Heavy-duty needle bear ings,sealed

Eccentric shaft: Case hardened alloy steel

Frame: Heavy welded steel frame provides rigid support necessary for crushing a wide variety of materials and for excellent wear characteristics Mini Jaw crushers are normally in stock for immediate shipment