Introduction of bentonite processing plant and crushing process

At present, bentonite processing technology is mainly purification, modification, activation, modification (organic soil preparation).

(1) purified bentonite ore purification methods is often broken into three types, namely, hand picking, winnowing (dry) and water selection (wet). milling machine for sale

Hand-selected mainly for high montmorillonite content of bentonite ore. Hand-selected in the mining field in general, artificial ore waste rock during the selected can also be applied in line with technical requirements of sub-areas in the lot, hierarchical position mining, were stacked, separate processing. Nowadays, more hand-selected, processing flow can be as follows:

Ore milling → → drying → packing → winnowing grading

Drying usually takes Sec carried out over the first ore most likely to pitch for natural drying, to ensure ore moisture from 40% to 25% or less, then coarse crushing, broken product dimension is 30 ~ 40mm. Will further drying the item of broken , the normal air drying and fluidized dry drying equipment utilised in the leading fluidized dryer, rotary dryer shutters, Tornado dryer, rotary dryer etc. drying temperature below 250 ℃, the item water control in under 6% to 12% drying time, drying temperature is too high or long will affect product quality, and in many cases reduction in colloid. Raymond mill is by and large used, the item fineness in accordance with user request, generally 100 - 325. After grinding the goods using a cyclone-type classifier for classification Sand (mixed) was following final product. mixed barrel for beneficiation plant

For high-purity bentonite or montmorillonite, or montmorillonite content processing and consumption of 30% to 80% within the low-grade bentonite, selected for usage wet or wet purification process.

Purification strategy of wet bentonite, bentonite ore crushed to not as much as 5mm, mixing with water content of 25% is manufactured out of pulp, then spiral classifier or some other hydraulic classifier granularity than isolated coarse sand and carbonate minerals, the rest of the suspension in to the high-speed rotation from the centrifugal separator, which include horizontal spiral centrifuge discharge settlement, fine-grained carbonate and additional separation of feldspar and various impurities, for being a lot less than 5um particle size , the development multiple of 20 or higher high purity montmorillonite or bentonite slurry or suspension of such slurry filtration, dried and cracked after depolymerization for getting high-purity bentonite products fallout after centrifugation Besides containing few fine-grained carbonate and feldspar and also other things, contain more impurities in order to satisfy the fabrication requirements with the bentonite activated clay, therefore, whether it is by using a specific amount of acid response to produce activated clay.

Another method to wet weight metaphosphate purification way of the Act is included with the bentonite slurry containing industrial dilute solution of sodium hexametaphosphate, allowing the rapid precipitation of mineral impurities, and then separated. Specific work process the following: first bentonite slurry made out of liquid to solid ratio of just one.5 to 2, then your slurry mixture in to the meter measurement, while adding sodium hexametaphosphate solution, the dosage of bentonite mass about 0.5% of the bentonite rapid settlement, partial sodium concentration should not be too thick, mix well within the settler slurry sedimentation, grit may be the impurities, suspended solids further separation, purification, drying, depolymerization, swelling can obtain high-purity soil. is usually repeated a couple of times with precipitation, and ultimately receive greater than 99% montmorillonite content of bentonite concentrate of high purity.

(2) modified bentonite modified by changing the ion exchange between your exchangeable cations of montmorillonite type, to raise or improve physical and chemical properties of bentonite, calcium bentonite, specially the function of physical and chemical properties.

The physical properties of sodium bentonite is superior to calcium bentonite, sodium bentonite so than calcium bentonite includes a higher application value and economic value, however, anyway or calcium bentonite deposits Bentonite dominant, hence the sodium bentonite bentonite of hair became one in the main processing technology.

Sodium calcium bentonite treatment for the overall approach will be to add sodium calcium bentonite (usually Na2CO3), ion exchange reaction to occur, Na + exchanged montmorillonite of Ca2 + to transform the sodium bentonite. retrofit means of dry and wet two.

Bentonite dry process is crushed into a certain size, adding plenty of Na2CO3 mixing and extrusion, and after that drying and grinding; in Na2CO3 and bentonite can certainly be placed after a certain time of mixing to full response, and then drying and grinding. bentonite while using the wet process is combined in plenty of Na2CO3 timely in the water for making mixture more uniform, more filled with sodium.

Process of sodium bentonite, for you to help effect of sodium, is often added hardly any additives, like tannic acid.

Lithium-bentonite to gelation in organic solvents, as opposed to organic bentonite, a larger application value, although the reserves of natural lithium-bentonite little, in final summary is the preparation of artificial lithium lithium-bentonite One of the primary methods.

Impact indicators within the quality of organic bentonite main factors of quality bentonite (type, purity, exchange capacity, etc.), the dwelling of organic covering agent, dosage, usage, preparation conditions (pulp density, reaction temperature, reaction time, etc. ).

Organic bentonite raw material requirements of a bit of sand, cation exchange capacity, cation exchange capacity and purity will likely be proportional addition, the type of exchangeable cations of organic bentonite has also great relation to the quality of general, needs to be utilised in high purity, exchange capacity, exchangeable sodium level of high-quality organic bentonite sodium bentonite as raw material, but the natural manufacturing of bentonite to varying examples of impurities, therefore, purification process about the The products organic bentonite have got a major impact. What's more, before over the same material inside bentonite with assorted agents or modified activator treatment also cation exchange capacity of bentonite along with an important effect on activity, thus affecting the organic swelling soil quality. grinding mill plant

Covering the dwelling on the organic agent, dosage, usage have an effect on the grade of organic bentonite organic type and since the structure of agents of several length of carbon chain, a major difference in lipophilicity, thereby directly affecting the performance of organic bentonite application and apply of organic ammonium salt of montmorillonite and it is molecular weight on the affinity, the higher the excess weight, greater easily adsorbed to montmorillonite, which can be resulting from high ammonium and montmorillonite along with the exchangeable cation exchange reaction, but additionally both molecular adsorption role, therefore, usage of quaternary ammonium salt made by organic bentonite, the long-chain alkyl carbon atoms generally be over 12 research indicates that, while in the preparation of organic bentonite, the blending of a couple of with the covering agent, using some features and uses in comparison to the effect of merely one dose coverage is much better.