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Preparation method for high-oil-factor ultra-fine kaolin

An ultra-fine kaolin, high oil absorption technology, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of low product grade, low viscosity, and low technical content.

Active Publication Date: 2014-01-08
广东科进应用技术研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a method for preparing superfine kaolin with high oil absorption value. Defects, reduce imports and exports, save and make full use of existing resources, and meet the refinement requirements of modern industry for kaolin powder as much as possible
During the preparation process of this method, the sieve residue of the product will not exceed the standard, and the obtained product is non-corrosive and has low viscosity and is easy to disperse in the solution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of preparation method of superfine kaolin with high oil absorption value described in the present embodiment 1, comprises the following steps:

[0020] (1) Put 1000g of kaolin raw ore into a drying oven, dry at 100°C for 1.5h, take it out and use a multi-functional pulverizer to pulverize it for 10min to below 200 mesh;

[0021] (2) Take 500g of pulverized kaolin and 500ml of water to make a slurry and pour it into the big sesame cake, add 1 g of sodium dithionite and sodium polyacrylate at a weight ratio of 0.001, and stir under electric power at room temperature for 1 hour at a speed of 500 r / min; Then add 4 ml of sulfuric acid with a concentration of 98% and 20 g of hydrogen peroxide into the beaker, and continue vigorous stirring for 2 h; the volume ratio of sulfuric acid is 0.004;

[0022] (3) Using the SW-3000 wet grinding machine, pump the slurry prepared in step (2) into the grinding machine for 1 hour, and add 2 g of sodium dodecylsulfonate at a weight r...

Embodiment 2

[0027] A kind of preparation method of superfine kaolin with high oil absorption value of this embodiment 2, its steps are:

[0028] (1) Put 1000g of kaolin raw ore into a drying oven, dry at 100°C for 1.5h, take it out and use a multi-functional pulverizer to pulverize it for 10min to below 200 mesh;

[0029] (2) Take 500g of pulverized kaolin and 500ml of water to make a slurry and pour it into a large sesame cake, add 1 g of sodium dithionite and sodium polyacrylate at a weight ratio of 0.0015, and stir electrically at room temperature for 1.5 hours at a speed of 500r / min; Then add 4 ml of hydrochloric acid with a concentration of 98% and 20 g of hydrogen peroxide into the beaker, and continue vigorous stirring for 2 h; the volume ratio of hydrochloric acid is 0.005;

[0030] (3) Using the SW-3000 wet grinding machine, pump the slurry prepared in step (2) into the grinding machine for 1.5 hours, and add 2g sodium dodecylsulfonate at a weight ratio of 0.001~0.002 during the ...

Embodiment 3

[0035] The preparation method of a kind of high oil absorption superfine kaolin of this embodiment 3, its steps are:

[0036] (1) Put 1000g of kaolin raw ore into a drying oven, dry at 100°C for 1.5h, take it out and use a multi-functional pulverizer to pulverize it for 10min to below 200 mesh;

[0037] (2) Take 500g of pulverized kaolin and 500ml of water to make a slurry and pour it into a large sesame cake, add 1 g of sodium dithionite and sodium polyacrylate at a weight ratio of 0.0015, and stir electrically at room temperature for 1.5 hours at a speed of 500r / min; Then add 4 ml of sulfuric acid with a concentration of 98% and 20 g of hydrogen peroxide into the beaker, and continue stirring vigorously for 2 h; the volume ratio of sulfuric acid is 0.005;

[0038] (3) Using the SW-3000 wet grinding machine, pump the slurry prepared in step (2) into the grinding machine for 1.5 hours, and add 2g sodium dodecylsulfonate at a weight ratio of 0.001~0.002 during the grinding proc...

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Abstract

The invention discloses a preparation method for high-oil-factor ultra-fine kaolin. The preparation method comprises the following steps of (1) drying kaolin raw ores in a drying box, and then smashing the kaolin raw ores; (2) mixing the smashed kaolin and water to obtain serous fluid, adding sodium dithionite and sodium polyacrylate in the serous fluid, electrically stirring the mixture at normal temperature, then adding sulfuric acids or hydrochloric acids and hydrogen peroxide in the mixture, and continuing stirring the mixture intensely; (3) pumping the serous fluid prepared from the step (2) in a grinding mill, grinding the serous fluid, and adding sodium dodecyl sulfate in the serous fluid in a grinding process; (4) performing solid and fluid separation on the serous fluid prepared from the step (3) by using a filter press to obtain filter cakes; (5) drying and distributing the filter cakes, and spraying the filter cakes by using a spraying machine to obtain kaolin raw powder; and (6) scattering and roasting the kaolin raw powder, annealing naturally, cooling the roasted kaolin powder at normal temperature, and scattering the kaolin powder to obtain the high-oil-factor ultra-fine kaolin products. In a preparation process, screen tailings of the products do not exceed standards, the obtained products is non-corrosive, is low in viscosity, and can be scattered in liquor easily.

Description

technical field [0001] The invention relates to a preparation method of superfine kaolin with high oil absorption value, in particular to a preparation method of superfine kaolin with high oil absorption value that is non-corrosive, low in viscosity and easy to disperse in a solution. Background technique [0002] As an industrial mineral with excellent performance, kaolin is widely used in dozens of industries such as papermaking, paint, ceramics, rubber, chemical industry, medicine, and national defense. In recent years, the beneficiation process of kaolin has been continuously improved, its application value has been further developed, and its application fields have become more extensive. The application market of kaolin is very scattered, and the more developed the economy, the greater the usage of kaolin. Kaolin in the international market is basically supplied by the United States, Brazil, the United Kingdom, and Australia, and only a small amount of kaolin raw mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
Inventor 尹荔松黄韶葵
Owner 广东科进应用技术研究有限公司
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