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Preparation method of superfine high-purity kaolin

A kaolin and purity technology, which is applied in the field of preparation of ultra-fine high-purity kaolin, can solve the problems of low product grade and low technical content, and achieve obvious economic and social benefits

Inactive Publication Date: 2017-01-04
梁慧娴
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to overcome the defects of low technical content and low product grade in the existing kaolin preparation methods in our country, reduce import and export, save and make full use of existing resources, and meet the refinement requirements of modern industry for kaolin ultrafine powder as much as possible

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of preparation method of superfine high-purity kaolin described in present embodiment 1, comprises the following steps:

[0019] (1) Impurity removal treatment: Take 1000g of kaolin raw ore and 1000ml of water to make a slurry, add 1 g of sodium dithionite and 4 ml of sulfuric acid or hydrochloric acid with a concentration of 98%, and stir at room temperature for 1 hour;

[0020] (2) Grinding treatment: use the SW-3000 wet grinder to pump the above slurry into the grinder for grinding for 1 hour, and add 1 g of sodium dodecylsulfonate during the grinding process;

[0021] (3) Press cake filtration treatment: use X-800 automatic pull plate filter press to separate solid and liquid;

[0022] (4) Drying treatment: Use XQ-4 powerful drying equipment to dry the filter cake. The inlet temperature of the equipment is controlled at 270 degrees, and the outlet temperature is controlled at 160-180 degrees. The water content of the processed powder is less than 1 %;

[00...

Embodiment 2

[0026] A kind of preparation method of superfine high-purity kaolin described in present embodiment 2, comprises the following steps:

[0027] (1) Impurity removal treatment: Take 1000g of kaolin raw ore and 1000ml of water to make a slurry, add 1 g of sodium dithionite and 4 ml of sulfuric acid or hydrochloric acid with a concentration of 98%, and stir at room temperature for 1.2 hours;

[0028] (2) Grinding treatment: use the SW-3000 wet grinder to pump the above slurry into the grinder for 1.2 hours and add 1 g of sodium dodecylsulfonate during the grinding process;

[0029] (3) Press cake filtration treatment: use X-800 automatic pull plate filter press to separate solid and liquid;

[0030] (4) Drying treatment: Use XQ-4 powerful drying equipment to dry the filter cake. The inlet temperature of the equipment is controlled at 270 degrees, and the outlet temperature is controlled at 160-180 degrees. The water content of the processed powder is less than 1 %;

[0031] (5) ...

Embodiment 3

[0034] A kind of preparation method of superfine high-purity kaolin described in present embodiment 3, comprises the following steps:

[0035] (1) Impurity removal treatment: take 1000g of kaolin raw ore and 1000ml of water to make a slurry, add 1 g of sodium dithionite and 4 ml of sulfuric acid or hydrochloric acid with a concentration of 98%, and stir at room temperature for 1.5 hours;

[0036] (2) Grinding treatment: use the SW-3000 wet grinder to pump the above slurry into the grinder for 1.5 hours and add 1 g of sodium dodecylsulfonate during the grinding process;

[0037] (3) Press cake filtration treatment: use X-800 automatic pull plate filter press to separate solid and liquid;

[0038] (4) Drying treatment: Use XQ-4 powerful drying equipment to dry the filter cake. The inlet temperature of the equipment is controlled at 270 degrees, and the outlet temperature is controlled at 160-180 degrees. The water content of the processed powder is less than 1 %;

[0039] (5) ...

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PUM

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Abstract

The invention discloses a preparation method of superfine high-purity kaolin. The preparation method comprises the following steps: (1) impurity removal treatment: preparing slurry from 1,000g of kaolin raw ore and 1,000ml of water; adding 1g of sodium hydrosulfite and 4ml of 98% sulfuric acid or hydrochloric acid; and stirring for 1-1.5 hours at normal temperature; (2) grinding treatment: pumping the slurry into a SW-3000 type wet grinder and grinding for 1-1.5 hours, wherein in the grinding process, 1g of sodium dodecyl sulfonate is added; (3) cake pressing and filtering treatment: performing solid-liquid separation with a X-800 automatic pull-plate filter press; (4) drying treatment: performing component drying treatment on the filter cake by using XQ-4 type powerful drying equipment, wherein the entrance temperature of the equipment is controlled to 270 DEG C, the exit temperature is controlled to 160-180 DEG C, and the water content of the treated powder is less than 1%; (5) calcination treatment: putting the powder into a rotary kiln, controlling the kiln temperature at 1,200-1,250 DEG C and calcining for 1-1.5 hours; and (6) naturally annealing and cooling at normal temperature to obtain the product.

Description

technical field [0001] The invention relates to a preparation method of kaolin, in particular to a preparation method of ultrafine high-purity kaolin. Background technique [0002] my country's kaolin mineral resources and reserves are very rich. Kaolin is an important industrial mineral in non-metallic minerals. It is widely used in many industries such as papermaking, coatings, rubber, ceramics, plastics, chemicals, and medicine. Modern industry has higher and higher requirements for kaolin ultrafine powder, and all require micron, submicron and even nanometer products. In terms of color and whiteness, the requirements are the same as those of high-quality Chin white powder. The existing kaolin preparation methods in my country mainly include wet impurity removal and water washing separation method, ball milling method, and Raymond milling method. These methods all have a common defect, that is, the technical content is not high and the product grade is low, which leads t...

Claims

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Application Information

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IPC IPC(8): C01B33/40
CPCC01B33/40C01P2004/60C01P2006/60
Inventor 梁慧娴
Owner 梁慧娴