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Technique for producing fine barium sulfate by barite sulfuric acid process

A barite and barium sulfate technology, applied in the direction of calcium/strontium/barium sulfate, etc., can solve the problems of high cost, low product grade, complex production process, etc., and achieve low product cost, white color and strong market competitiveness Effect

Inactive Publication Date: 2008-03-05
HONGXING XINHUANG EXACT CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing methods for producing barium sulfate with barite as raw material mainly include the barite mirabilite method and the barium chloride mirabilite method. Expansion of the application field of barium sulfate; some production processes are complex and costly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Grind and mix barite and anthracite at a weight ratio of 1:0.26, put them into a calcination converter for calcination, control the temperature at 1200°C, and calcine for 2 hours to produce crude barium sulfide containing about 60% barium sulfide, commonly known as "black ash" ;

[0030] Put the above crude barium sulfide (black ash) into the leaching tank and soak it in hot water at 80°C, the weight ratio of water to the black ash containing barium sulfide is 1:0.1, and prepare sulfide containing BaS110g / L-135g / L. Barium solution, commonly known as "sulfonate water";

[0031] According to the weight ratio of barium sulfide to concentrated sulfuric acid 1:0.65, under the stirring condition of 300 revolutions per minute, the continuous reaction is carried out in the reactor. The pH value of this process is controlled at about 5, and white precipitated barium sulfate slurry and hydrogen sulfide gas are generated. ;

[0032] Add alkali to adjust the pH value (generally 1...

Embodiment 2

[0038] Grind and mix barite and anthracite at a weight ratio of 1:0.26, put them into a calcination converter for calcination, control the temperature at 1100°C, and calcine for 2 hours to produce crude barium sulfide containing about 60% barium sulfide, commonly known as "black ash" ;

[0039] Put the above crude barium sulfide (black ash) into the leaching tank and soak it in hot water at 85°C, the weight ratio of water to the black ash containing barium sulfide is 1:0.1, and prepare sulfide containing BaS110g / L-135g / L Barium solution, commonly known as "sulfonate water";

[0040] According to the weight ratio of barium sulfide to concentrated sulfuric acid 1:0.60, under the stirring condition of 300 revolutions per minute, the continuous reaction is carried out in the reactor. The pH value of this process is controlled at about 5, and white precipitated barium sulfate slurry and hydrogen sulfide gas are generated. ;

[0041] Add alkali to adjust the pH value, dry and pulv...

Embodiment 3

[0044] Grind and mix barite and anthracite at a weight ratio of 1:0.26, put them into a calcination converter for calcination, control the temperature at 1150°C, and calcine for 2 hours to produce crude barium sulfide containing about 60% barium sulfide, commonly known as "black ash" ;

[0045] Put the above-mentioned crude barium sulfide (black ash) into a leaching tank and soak it in hot water at 75°C, the weight ratio of water to black ash containing barium sulfide is 1:0.1, and prepare sulfide containing BaS110g / L-135g / L Barium solution, commonly known as "sulfonate water";

[0046] According to the weight ratio of barium sulfide to concentrated sulfuric acid 1:0.55, under the stirring condition of 300 revolutions per minute, the continuous reaction is carried out in the reactor. The pH value of this process is controlled at about 5, and white precipitated barium sulfate slurry and hydrogen sulfide gas are generated. ;

[0047] Add alkali to adjust the pH value, dry and ...

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PUM

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Abstract

The present invention discloses sulfuric acid process of producing refined barium sulfate with barite, and belongs to the field of chemical technology. The process includes the following main technological steps: producing black ash containing barium sulfate with coal calcining barite; soaking black ash containing barium sulfate in water to obtain barium sulfate solution; adding sulfuric acid into the barium sulfate solution to obtain slurry with barium sulfate precipitant; and dewatering the slurry, stoving and crushing to obtain refined barium sulfate product. The refined barium sulfate product has low cost, and may be applied widely in high grade paint, etc. and the production process is harmless and has environment friendship and high marketability.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a production process for preparing fine barium sulfate by using barite as a raw material, that is, a barite sulfuric acid method for producing fine barium sulfate. Background technique [0002] The existing methods for producing barium sulfate with barite as raw material mainly include the barite mirabilite method and the barium chloride mirabilite method. Expansion of the application field of barium sulfate; some production processes are complex and costly. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a kind of barite as raw material to produce fine grains, which can control environmental pollution and achieve harmless production, high product grade, adjustable particle size, simple process and low cost. Barium sulfate production process, that is barite sulfuric acid ...

Claims

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Application Information

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IPC IPC(8): C01F11/46
Inventor 姜志光郑淑平詹川勇祁润岳吴飞吕冬冬华敬礼
Owner HONGXING XINHUANG EXACT CHEM
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