Method for preparing manganese sulfate from sulfur-containing waste residue

A manganese sulfate and waste slag technology, which is applied to the removal of manganese sulfate and solid waste, can solve the problems of large environmental pollution, environmental pollution, and high utilization costs, and achieve outstanding environmental benefits, significant economic benefits, and reduced production costs.

Inactive Publication Date: 2010-08-25
XIANGXI AUTONOMOUS PREFECTURE MINERALS & NEW MATERIAL TECHNOLOGICAL INNOVATION SERVICE CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The discharge of these three kinds of slag is very large, causing serious environmental pollution and potential safety hazards
[0003] Due to the high sulfate content in the acid leaching electrolytic manganese slag and the acid leaching slag of vanadium extraction from stone coal, it is difficult to comprehensively utilize them under normal circumstances, and the utilization cost is high
These two kinds of slag can be calcined at high temperature to obtain cement clinker mixture or cement clinker, but the mixed gas of sulfur dioxide and sulfur trioxide produced by calcination is very polluting to the environment, and the cost of converting it into sulfuric acid is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Mix acid leaching electrolytic manganese slag and lead-zinc tailings at a ratio of 3.5:1, and add a small amount of diaspore and iron powder, so that the mass percentages of various oxides in the mixture are: CaO65%, SiO 2 20%, Al 2 o 3 5%, Fe 2 o 3 2.5%, after the mixture is ground to 120 mesh, it is calcined at 1320°C-1440°C to obtain cement clinker. The resulting mixed gas of sulfur dioxide and sulfur trioxide is dried with concentrated sulfuric acid, mixed with air and compressed, and then passed into the mixed slurry composed of pyrolusite and rhodochrosite. The mixed slurry of pyrolusite and rhodochrosite is prepared as follows: grind the mixed raw materials of pyrolusite and rhodochrosite to 100 mesh, then add water and stir to form a slurry with a solid-to-liquid ratio of 4:1. The quality of pyrolusite in the mixed slurry is its The mass of rhodochrosite is 92% of the theoretical reaction amount of sulfur dioxide in the gas mixture, and 95% of the theoret...

Embodiment 2

[0014] Mix vanadic acid leaching residue from stone coal extraction with lead-zinc tailings in a ratio of 4:1, and add a small amount of bauxite and iron powder, so that the mass percentage of various oxides in the mixture except sulfur is: CaO64.5 %, SiO 2 20.5%, Al 2 o 3 4.5%, Fe 2 o 3 2%, after the mixture is ground to 120 mesh, it is calcined at 1330°C-1450°C to obtain cement clinker. The mixed gas of sulfur dioxide and sulfur trioxide produced by calcination is dried with concentrated sulfuric acid, mixed with air and compressed, and then passed into the mixed slurry of pyrolusite and rhodochrosite. The mixed slurry of pyrolusite and rhodochrosite is prepared as follows: grind the mixed raw materials of pyrolusite and rhodochrosite to 100 mesh, add water and stir to form a slurry with a solid-to-liquid ratio of 5:1, and the quality of pyrolusite in the mixed slurry is equal to that of the mixed gas The mass of rhodochrosite is 92% of the theoretical reaction amoun...

Embodiment 3

[0016] Mix acid leaching electrolytic manganese slag and limestone in a ratio of 4.5:1, and add a small amount of diaspore and iron powder, so that the mass percentages of various oxides in the mixture are: CaO65%, SiO 2 20%, Al 2 o 3 5%, Fe 2 o 3 2.5%, after grinding the mixture to 120 mesh, calcining at 1360°C-1460°C to obtain cement clinker. The mixed gas of sulfur dioxide and sulfur trioxide produced by calcination is dried with concentrated sulfuric acid, mixed with air and compressed, and then passed into the mixed slurry of pyrolusite and rhodochrosite. The mixed slurry of pyrolusite and rhodochrosite is prepared as follows: grind the mixed raw materials of pyrolusite and rhodochrosite to 100 mesh, add water and stir to form a slurry with a solid-to-liquid ratio of 4:1, and the quality of pyrolusite in the mixed slurry is equal to that in the mixed gas. The theoretical reaction amount of sulfur dioxide is 92%, and the mass of rhodochrosite is 95% of the theoretic...

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PUM

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Abstract

The invention relates to a method for preparing manganese sulfate from sulfur-containing waste residue, i.e. acid-leaching electrolytic manganese slag and lead-zinc tailings or limestone are calcined at high temperature, stone coal vanadium-extraction acid-leaching slag and lead-zinc tailing or limestone are calcined at high temperature, or acid-leaching electrolytic manganese slag, stone coal vanadium-extraction acid-leaching slag and lead-zinc tailing or limestone are mixed to be calcined at high temperature. Sulfur dioxide and sulfur trioxide mixed gases which are produced in the calcining are dried by concentrated sulfuric acid and are mixed with air to be compressed and to be guided into a mixed solution consisting of the pyrolusite, rhodochrosite and water, the solution is mixed continuously in the whole process, the extraction time is 4 to 10 hours, the extraction temperature is 20 to 90 DEG C, and the manganese sulfate solution for electrolysis is obtained after the removal of foreign matters and filtering. The solution is evaporated, concentrated, crystallized and dried to obtain the manganese sulfate product under the temperature of 80 to 100 DEG C.

Description

technical field [0001] The invention relates to a method for preparing manganese sulfate from sulfur-containing waste residue. Background technique [0002] Acid leaching electrolytic manganese slag is the slag left after leaching rhodochrosite with sulfuric acid, in which the sulfate content is above 20%. The acid leaching electrolytic manganese slag produced by producing 1 ton of electrolytic manganese is about 9 tons. The acid leaching slag of vanadium extraction from stone coal is the slag left after leaching stone coal with sulfuric acid, which also contains a large amount of sulfate radicals, and produces 1 ton of V 2 o 5 The slag produced is about 150 tons. Lead-zinc tailings are the powdery or fine sandy wastes discharged from the lead-zinc mining plant after flotation beneficiation. The production of 1 ton of lead-zinc concentrate produces about 60 tons of lead-zinc tailings. The discharge of these three kinds of slag is very large, causing serious environmental ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/10B09B3/00
Inventor 吴显明陈上麻明友何则强刘建本陈良钢陈善文
Owner XIANGXI AUTONOMOUS PREFECTURE MINERALS & NEW MATERIAL TECHNOLOGICAL INNOVATION SERVICE CENT
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