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Process for producing barium sulfide

A technology of barium sulfide and a new method, applied in the direction of magnesium/calcium/strontium/barium sulfide/polysulfide, etc., can solve the problems of difficult close contact, large distance between each other, poor heat preservation effect of converter, etc., to achieve reduction The atmosphere is easy to control, the temperature is easy to control, and the heat preservation effect is good.

Inactive Publication Date: 2006-12-13
马武权
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 1. The conversion rate of barium sulfate into barium sulfide is low, generally only 60-70%. Due to the low conversion rate, the content of barium sulfide in black ash products is generally only about 60%, and it is difficult to reach more than 70%. High-quality (that is, high barium sulfide content) black ash products mainly waste barite resources, increase transportation costs, and generate a large amount of waste residue, polluting the environment
[0012] 2. High coal consumption
[0013] Above insufficient reason is that the production method of prior art is unreasonable to cause
In barium sulfate (BaSO 4 ) is reduced to barium sulfide (BaS) with BaSO 4 Solid-solid reaction with C and BaSO 4 Solid-gas reaction with CO, barium sulfate and carbon are constantly rotating in the converter, the dista...

Method used

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  • Process for producing barium sulfide
  • Process for producing barium sulfide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Implement raw material selection:

[0026] Barite: BaSO 4 The content is 98%, the loss on ignition is 0.1%, and the barite raw material collection point is Xifeng County, Guizhou Province.

[0027] Coal: The carbon (C) content is 62%, the ash content is 20%, and the raw coal collection point is Jinsha County, Guizhou Province.

Embodiment approach

[0029] First crush the barite to a particle size below _30mm, mix 120 tons of barite and 30 tons of coal in a weight ratio of 1:0.25, mix well, grind to 80 mesh with a ball mill, and the sieve residue is less than 2%. Add 14% water to make a block of 60×120×240mm, stack the block on the tunnel kiln car, push it into the tunnel kiln for calcination, the highest temperature in the high temperature zone is 950°C, and the retention time of the block in the high temperature zone is 2 Hour.

[0030] Implementation results:

[0031] The obtained crude barium sulfide (black ash) product was 92.37 tons, and the BaS content was 90.6% through analysis and testing. BaSO 4 The conversion rate is 98.3%, and the total coal consumption per ton of black ash (raw coal plus kiln coal) is 420kg.

Embodiment 2

[0033] Implement raw materials:

[0034] Barite: BaSO 4 The content is 90%, the loss on ignition is 2.5%, and the barite raw material collection point is Tianzhu County, Guizhou Province.

[0035] Coal: The carbon (C) content is 62%, the ash content is 20%, and the raw coal collection point is Jinsha County, Guizhou Province.

[0036] method of execution:

[0037] First crush the barite to a particle size below _30mm, mix 150 tons of barite and 30 tons of raw coal in a weight ratio of 1:0.20, mix well, grind to 80 mesh with a ball mill, and the sieve residue is less than 2%. Add 14% water to the material to make a 60×120×240mm material block, stack the material block on the tunnel kiln car, and push it into the tunnel kiln for calcination. The highest temperature in the high temperature zone of the tunnel kiln is 950°C, and the retention time for 2 hours.

[0038] Implementation results:

[0039] The obtained crude barium sulfide (black ash) product was 115 tons, and the ...

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Abstract

The invention relates the method for production of barium sulphide. The method comprises the following steps: mixing the barite powder and coal in proper proportion, bruising and grinding, putting water to get block, and then reduction roasting them with tunnel kiln, wheel kiln and down-draft kiln. The invention has the advantages of improving the conversion rate of barium sulphide and reducing the coal consumption.

Description

technical field [0001] The present invention relates to a kind of production method of producing barium sulfide, relate to barite (BaSO4) used in chemical industry 4 ) and coal (C) are a production process for producing barium sulfide (BaS) as raw materials. Background technique [0002] Document "Inorganic Salt Industry Handbook" (published in August, 1988 by Chemical Industry Press, edited by Tianjin Research Institute of Chemical Industry, etc.), the production method of barium sulfide disclosed in P.176-179 is a prior art. The production method is to crush the barite (BaSO 4 >85%) and coal (fixed carbon >75%) are mixed according to the ratio of 100:25-27 (by weight), and then continuously fed into the converter for reduction reaction at 1000-1300°C. [0003] Barite is reduced to BaS in the converter in the following ways: [0004] <chemistry num="001"> <chem file="200610050931_cml001.xml" / > < / chemistry> [0005] <chemistry num="002">...

Claims

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Application Information

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IPC IPC(8): C01B17/44
Inventor 马武权胡兆平朱云勤吴登权龚会琴郭淑琴包光富
Owner 马武权
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