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Dry purification process for low grade bentonite

A technology of dry purification and bentonite, which is applied in chemical instruments and methods, solid separation, aluminum silicate, etc., can solve the problems of low recovery rate, limited purification effect, and small increase in montmorillonite content, and achieve an increase in recovery rate , Reduce use limitations, increase the effect of increasing the content of montmorillonite

Active Publication Date: 2018-08-17
苏州中材非金属矿工业设计研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional dry purification process is relatively simple, the production cost is low, but the purification effect is limited, the montmorillonite content in the product has a small increase, and the recovery rate is low. Generally, it is only suitable for ores with good raw ore grade and high montmorillonite content. , there are also relatively large limitations in the use of

Method used

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  • Dry purification process for low grade bentonite
  • Dry purification process for low grade bentonite
  • Dry purification process for low grade bentonite

Examples

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Effect test

Embodiment 1

[0049] The dry purification process of the low-grade bentonite of the present embodiment, its process flow chart is shown in figure 2 , including the following steps:

[0050] 1) crushing low-grade bentonite with a montmorillonite content of 55% and a sand content of 33% to a particle size of less than 1 cm to obtain a crushed product;

[0051] 2) The crushed product is subjected to coarse grinding and grinding, the mill speed of the coarse grinding and grinding is 2500r / min, the grinding time of the flash grinding is 20s, and the weight percentage of minerals with a grinding particle size of 10mm or less is 73.85% , to obtain the grinding product;

[0052] 3) Sieve the grinding product with a sieving particle size of 5 mm, directly discharge the coarse-grained product on the sieve, and obtain the under-sieve product after sieving;

[0053] 4) Break up the under-sieve product, the speed of the breaker is 3500r / min, the time for breaking up is 3min, and the break-up particle...

Embodiment 2

[0056] The dry purification process of the low-grade bentonite of the present embodiment, its process flow chart is shown in image 3 , including the following steps:

[0057] 1) crushing low-grade bentonite with a montmorillonite content of 48% and a sand content of 41% to a particle size of less than 1 cm to obtain a crushed product;

[0058] 2) The crushed product is subjected to coarse grinding and grinding, the mill speed of the coarse grinding and grinding is 2500r / min, the grinding time of the flash grinding is 40s, and the weight percentage of minerals with a grinding particle size of 10mm or less is 71.34% , to obtain the grinding product;

[0059] 3) Sieve the grinding product with a sieving particle size of 5 mm, directly discharge the coarse-grained product on the sieve, and obtain the under-sieve product after sieving;

[0060] 4) Break up the under-sieve product, the speed of the breaker is 3500r / min, the breakup time is 3min, the breakup particle size is D90=2...

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Abstract

The invention provides a dry purification process for low grade bentonite. The dry purification process for low grade bentonite provided by the invention comprises the following steps: 1) crushing thelow grade bentonite to obtain a crushed product; 2) carrying out rough ore grinding on the crushed product to obtain an ore-ground product; 3) screening the ore-ground product, directly discharging sand from a plus sieve coarse product, and screening the coarse product to obtain a minus sieve product; 4) scattering the minus sieve product to obtain a scattered product; and 5) grading the scattered product to obtain a dry purification concentrate product. The dry purification process for low grade bentonite provided by the invention adopting a dry purification novel process of raw ore crushing, rough grinding, screening, scattering and grading can improve the grade and the recovery rate of montmorillonite in the dry purification product, so that the dry purification effect is improved obviously and the using boundedness of the dry purification process is reduced.

Description

technical field [0001] The invention belongs to the technical field of bentonite purification, and relates to a dry purification process of low-grade bentonite. Background technique [0002] Bentonite is a non-metallic mineral with montmorillonite as the main mineral component. The main chemical components are silicon dioxide, aluminum oxide and water, and it also contains iron, magnesium, calcium, sodium, potassium and other elements. The content of sodium oxide and calcium oxide is It has a great influence on the physical and chemical properties and technological performance of bentonite. Bentonite hardness 1~2, density 2~3g / cm 3 . Bentonite has good adsorption, expansion, ion exchange, catalysis, thixotropy, suspension, etc. After processing, it can be used as purification and decolorization agent, binder, thixotropic agent, suspending agent, stabilizer, filling material, Feed, catalyst, etc., can be widely used in agriculture, light industry, cosmetics, pharmaceutical...

Claims

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Application Information

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IPC IPC(8): B02C21/00B02C23/08B02C23/14B02C23/16B02C23/20B07B9/00C01B33/26
CPCB02C21/00B02C23/08B02C23/14B02C23/16B02C23/20B07B9/00C01B33/26
Inventor 杨启帆安卫东于阳辉张韬程飞飞岑对对
Owner 苏州中材非金属矿工业设计研究院有限公司
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