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Efficient modifying method for wollastonite powder

A wollastonite powder and modification technology are applied in chemical instruments and methods, inorganic pigment treatment, dyed low molecular organic compound treatment and other directions, which can solve the problems of long time and cumbersome process, and achieve simple process, simple process and convenient use. Effect

Inactive Publication Date: 2008-03-19
SHANXI TAIHUA TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the traditional method, the surface coating of natural wollastonite mineral powder mostly adopts a wet process. After coating, it needs to go through processes such as filtering, washing, drying, and breaking up. The modified mineral powder, as a filler, still needs to add water to prepare a certain concentration of slurry after it enters the paper mill, and it can be added to the wood pulp fiber after being gradually diluted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 (theoretical coating rate of calcium carbonate is 10%)

[0022] Prepare dry powder compound A first: take 500g and process it into Jilin Lishu county wollastonite powder A of 400 meshes, add 107.07g of industrial sodium carbonate E with a content of 99%, and then add 8g of dry powder compound C composed of cationic flocculant and bentonite , the cationic flocculant in the dry powder compound C is polyaluminum chloride, the addition amount is 0.8g, and the swelling is 7.2g, all of which are put into the mixer, and the material is discharged after stirring for 3 minutes;

[0023] Then prepare dry powder compound B: get 500g and process it into 400 mesh Jilin Lishu county wollastonite powder B, add 112.12g of calcium chloride anhydrous F with a content of 99%, then add 2.45g of ethylenediaminetetraacetic acid disodium and The dry powder compound D composed of aluminum chloride, the ratio of the amount of disodium edetate and aluminum chloride is 3:10, all of w...

Embodiment 2

[0026] Embodiment 2 (theoretical coating rate of calcium carbonate is 20%)

[0027] Prepare dry powder compound A first: take 500g and process it into 600 mesh Qinghai Dulan county wollastonite powder A, add 214.14g of industrial sodium carbonate E with a content of 99%, and then add 12g of dry powder compound C composed of cationic flocculant and bentonite , wherein the cationic flocculant is polyamine-type cationic flocculant CFAM-30, its addition amount is 1.2g, bentonite is 10.8g, and then add 4.90g of dry powder compound D composed of disodium edetate and aluminum chloride , the ratio of the amount of disodium edetate to aluminum chloride is 3:10, all of which are put into the mixer, and the material is discharged after stirring for 3 minutes;

[0028] Then prepare dry powder compound B: take 500g and process it into 600 mesh Qinghai Dulan county wollastonite powder B, add 331.31g of anhydrous calcium nitrate F with a content of 99%, put it all into a mixer, and discharge...

Embodiment 3

[0031] Embodiment 3 (theoretical coating rate of magnesium carbonate is 30%)

[0032] Prepare dry powder compound A first: take 500g and process it into 800 mesh Jiangxi Xinyu wollastonite powder A, add 321.21g of industrial sodium carbonate E with a content of 99%, add 16g of dry powder compound C composed of cationic flocculant and bentonite, in which cationic The flocculant is quaternary ammonium cationic flocculant ST-50, its addition amount is 1.6g, bentonite is 14.4g, then add 8.75g of dry powder compound D composed of disodium edetate and aluminum chloride, ethylenediaminetetraacetic acid disodium and aluminum chloride The ratio of the amount of disodium amine tetraacetate and aluminum chloride is 3: 10, all of which are put into the mixer, and the material is discharged after stirring for 3 minutes;

[0033] Then prepare dry powder compound B: take 500g and process it into 800 mesh Jiangxi Xinyu wollastonite powder B, add 342.71g of anhydrous magnesium chloride F with ...

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PUM

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Abstract

A high-efficient silica grey powder modification method concretely relates to a high-efficient natural silica grey powder modification method using dry powder proportioning. The modified silica grey powder is especially applicable to be used as filler in plastic and paper making industry and the problem to be solved is providing a natural silica grey powder modification method with dry powder proportioning, simple process, high modifying efficiency, convenient operation and low cost. The adopted scheme includes that dry-powder composite A containing silica grey powder and dry-powder composite B containing silica grey powder are respectively prepared, appropriate amount of water is added into a pulp preparation tank, followed by addition and stirring of dry-powder composite A (or dry-powder composite B). After complete dissolution, the prepared dry-powder composite B (or dry-powder composite A) is added in turn with stirring until the slurry is neutral. The invention can be widely used in plastic, rubber, paper-making, coating and paint etc., and has good market application prospect.

Description

technical field [0001] The invention relates to an efficient method for modifying wollastonite powder, in particular to a method for modifying dry powder ingredients and high-efficiency natural wollastonite powder. The modified wollastonite powder is particularly suitable for use as a filler in the plastic and papermaking industries . Background technique [0002] Mineral powders are widely used in industries such as plastics, rubber, paper, coating and coatings due to their low price and the ability to improve the properties of matrix materials. However, due to the strong tendency of cleavage fracture along the cleavage plane during the crushing process of the mineral crystal, the surface of the mineral powder has a flat cleavage plane and sharp edges and corners. The flat cleavage surface makes the bonding force between the mineral powder and the matrix poor, and the sharp edges and corners are the stress concentration points during the material failure process, which can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/06C09C3/08
Inventor 王兆华
Owner SHANXI TAIHUA TRADE
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