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Purification method for medium-low grade bentonite

A purification method and technology of bentonite, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as increased cost and short cycle, and achieve the effects of convenient operation, simple steps and simple process steps.

Inactive Publication Date: 2019-04-23
63653 FORCES PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Centrifugal purification process has a short period and high efficiency, but it also increases the cost of purification

Method used

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  • Purification method for medium-low grade bentonite
  • Purification method for medium-low grade bentonite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] S1: Grind bentonite raw ore (montmorillonite content is 33%) and pass through a 200-mesh sieve to obtain bentonite powder with a particle size of 0.075 mm; mix bentonite powder and deionized water at a solid-to-liquid ratio of 1:12 to make bentonite slurry , stirred with an electric stirrer for 30 min, then stood still for 24 h, adjusted the system to 0.001 mol / L HCl system, stirred until there was no obvious foaming, and removed the carbonate in the raw ore;

[0031] S2: Let it stand until the supernatant is clear, then discard the supernatant; add water to the original scale, add 1 mLH 2 o 2 , placed in a constant temperature oscillator, and shaken at a constant temperature at 40 °C for 1 h to make it fully react and remove the organic matter in the components; let the bentonite slurry stand for 8 h to settle naturally, and extract more than 10 cm by siphon method Suspension, repeated addition of deionized water and extraction;

[0032] S3: Centrifuge the extracted ...

Embodiment 2

[0035] S1: Grind bentonite raw ore (57% montmorillonite content) and pass through a 200-mesh sieve to obtain bentonite powder with a particle size of 0.075 mm; mix bentonite powder and deionized water at a solid-to-liquid ratio of 1:12 to make bentonite slurry , stirred with an electric stirrer for 30 min, then stood still for 24 h, adjusted the system to 0.001 mol / L HCl system, stirred until there was no obvious foaming, and stood until the supernatant was clear, then poured off the supernatant;

[0036] S2: Refill water to the original scale, add 1 mLH 2 o 2 , placed in a constant temperature shaker, and shaken at a constant temperature at 40 °C for 1 h to make it fully react and remove the reducing groups in the components. After the bentonite slurry was allowed to settle naturally for 8 hours, the suspension above 10 cm was extracted by siphon method, and deionized water was added and extracted repeatedly;

[0037] S3: centrifuge the extracted upper layer suspension to r...

Embodiment 3

[0040] S1: Grind bentonite raw ore (57% montmorillonite content) and pass through a 200-mesh sieve to obtain bentonite powder with a particle size of 0.075 mm; mix bentonite powder and deionized water at a solid-to-liquid ratio of 1:8 to make bentonite slurry , stirred with an electric stirrer for 30 minutes, then stood still for 24 hours, adjusted the system to 0.001 mol / L HCl system, stirred to make the reaction without obvious foaming, stood until the supernatant was clear, and poured off the supernatant;

[0041] S2: Refill water to the original scale, add 1 mLH 2 o 2 , placed in a constant temperature shaker, and shaken at a constant temperature at 40 °C for 1 h to make it fully react and remove the reducing groups in the components. After the bentonite slurry was allowed to settle naturally for 8 hours, the suspension above 10 cm was extracted by siphon method, and deionized water was added and extracted repeatedly;

[0042] S3: centrifuge the extracted upper layer sus...

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Abstract

The invention discloses a purification method for medium-low grade bentonite. The method includes crushing and grinding medium-low grade bentonite mineral powder, sieving with a 200-mesh sieve, mixingthe obtained bentonite powder with deionized water, fully dispersing mineral particles bonded together in the bentonite under the action of mechanical force to prepare a bentonite slurry material, and adding a chemical agent into the dispersed bentonite slurry liquid to remove part of impurities and fully suspending mineral particles in the bentonite; physically purifying the fully-suspended slurry liquid and repeatedly extracting the upper slurry liquid; and then dewatering the upper slurry liquid of the extracted bentonite by a centrifugal method, drying and grinding to obtain bentonite concentrate with higher purity. In the method, HCl and H2O2 are used to remove carbonate and organic matters in the bentonite slurry liquid, and constant-temperature oscillation is assisted to fully react, so that the slurry liquid can be fully suspended, the subsequent physical method has a better purification effect, and the purification efficiency is improved.

Description

technical field [0001] The invention belongs to the field of non-metallic mineral materials, and in particular relates to a purification method for middle and low-grade bentonite. Background technique [0002] Bentonite, also known as bentonite and bentonite, is a clay resource with excellent performance, high economic value and wide application range. Its main mineral composition is montmorillonite, mixed with a certain amount of dense impurities such as quartz and feldspar. Bentonite has excellent physical and chemical properties, such as water swelling, adsorption, dispersion and suspension, cation exchange, thixotropy, cohesiveness, lubricity, etc., making it play an important role in more than 100 sectors in 24 fields of the national economy , enjoying the reputation of "universal clay". In particular, bentonite with high montmorillonite content shows excellent performance in industries such as food and medicine. [0003] my country is rich in bentonite resources, ra...

Claims

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Application Information

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IPC IPC(8): C01B33/40
CPCC01B33/40C01P2002/72C01P2002/82C01P2006/80
Inventor 不公告发明人
Owner 63653 FORCES PLA
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