Method of purifying montmorillonite, purified montmorillonite and composition thereof

A technology of montmorillonite and slurry, which is applied in the field of separation and purification of inorganic minerals, can solve the problems of difficult control of product quality, high cost, and long purification cycle, and achieve the effects of compact structure, improved purity, and difficult concentration and dehydration

Inactive Publication Date: 2007-08-15
ZHEJIANG HAILISHENG PHARM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dry method is suitable for high-quality ore dressing with a purity of montmorillonite above 80%. The process is simple, but the product quality is difficult to control
The wet method is suitable for the purification of medium and low-quality bentonite with a montmorillonite purity of 30-80%. The product quality is stable, but the purification cycle is long and the cost is high. The purity of the obtained montmorillonite is about 90%.

Method used

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  • Method of purifying montmorillonite, purified montmorillonite and composition thereof
  • Method of purifying montmorillonite, purified montmorillonite and composition thereof
  • Method of purifying montmorillonite, purified montmorillonite and composition thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Example 1 Purification of Montmorillonite

[0064] Mineral composition of raw bentonite: montmorillonite 42.5%, α-quartz 33.9%, kaolin 12.0%, feldspar 7.4%, calcite 4.3%, see Figure 2.

[0065] The raw ore is dried, crushed, passed through a 50-mesh sieve, added water and 0.3% sodium hexametaphosphate of raw ore powder to form a slurry with a solid content of 20%, stirred for two hours, passed through a three-stage hydrocyclone, and separated The slurry is mixed with water to make a thin slurry with a solid content of 3%, which is separated in a disc centrifuge, and the separated thin slurry is concentrated in another disc centrifuge, and the concentrated slurry is passed through a plate and frame filter press After pressure filtration, a filter cake with a solid content of 40-50% is obtained. The filter cake is dried at 120° C. and crushed to a size above 500 mesh.

[0066] The mineral composition of the purified montmorillonite is 95.1% montmorillonite and 5.1% α-...

Embodiment 2

[0067] Example 2 Purification of Montmorillonite

[0068] Mineral composition of raw bentonite: montmorillonite 46.8%, α-quartz 53.2%, see Figure 4.

[0069] The raw ore is dried, crushed, passed through a 50-mesh sieve, added water and 0.5% sodium polyacrylate powder of the raw ore to make a slurry with a solid content of 15%, stirred for two hours, passed through a four-stage hydrocyclone, and separated Add water to the slurry to make a thin slurry with a solid content of 3%, enter the disc centrifuge for separation twice, and the separated thin slurry enters another disc centrifuge to concentrate, and the concentrated slurry is pressed through the plate and frame After pressing by the filter machine, a filter cake with a solid content of 40-50% is obtained. The filter cake is dried at 120° C. and crushed to a size above 500 mesh.

[0070] The mineral composition of the purified montmorillonite: 96.7% montmorillonite, 3.3% α-quartz, see Figure 5. The recovery rate is 6...

Embodiment 3

[0071] Example 3 Purification of Montmorillonite

[0072] Mineral composition of raw bentonite: 86.5% montmorillonite, 13.5% α-quartz, see Figure 6.

[0073] The raw ore is dried, crushed, passed through a 50-mesh sieve, added water and 0.8% sodium hexametaphosphate of raw ore powder, and made into a slurry with a solid content of 25%. After stirring for two hours, it passes through a three-stage hydrocyclone, The separated slurry is mixed with water to make a thin slurry with a solid content of 3%, and it is separated once in a disc centrifuge, and the separated thin slurry is concentrated in another disc centrifuge, and the concentrated slurry passes through the plate frame After pressing by a filter press, a filter cake with a solid content of 40-50% is obtained. The filter cake is dried at 120° C. and crushed to a size above 500 mesh.

[0074] Mineral composition of purified montmorillonite: 97.0% montmorillonite, 3.0% α-quartz, see Figure 7. The recovery rate is 75%...

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Abstract

The invention discloses a purifying method of pure montmorillonite from natural alta-mud, which is characterized by the following: making the separating and purifying technique of montmorillonite from alpha quartz and square quartz easier; improving the purity of montmorillonite not less than 95%.

Description

technical field [0001] The invention relates to a method for separating and purifying inorganic minerals, in particular to a method for separating and purifying montmorillonite from natural bentonite. Background technique [0002] Natural bentonite is a mixture of clay and skeletal silicate minerals, the main mineral component is montmorillonite which expands with water. In order to obtain montmorillonite with higher purity or higher quality, it is necessary to separate and remove other minerals in natural montmorillonite. [0003] Natural montmorillonite is associated with non-clay silicate minerals such as silica, opal, feldspar, gypsum, calcite, perlite, zeolite, etc., and also contains clay minerals such as kaolinite, illite, chlorite, and a small amount of Organic matter, the content of montmorillonite is usually 50%-70%, and the content of some rich ore can reach 80%-90%. Utilizing the expansion characteristics of montmorillonite in water, it can be separated from th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/20C01B33/40
CPCB03B5/32
Inventor 郑海辉吕光烈
Owner ZHEJIANG HAILISHENG PHARM CO LTD
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