Method for preparing manganese sulfate by using sulfur-containing carbonaceous manganese carbonate ore

A technology of manganese carbonate and manganese sulfate, which is applied in the field of metallurgy, can solve the problems of easy production, difficulty in development and utilization, and obstruction of CO2 escape, etc., and achieve ideal reduction effect, less impurities, and low cost of reduction roasting

Inactive Publication Date: 2013-04-03
DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its relatively low manganese content, and a layer of oily substance will cover the liquid surface during chemical leaching, which hinders CO 2 The escaping of manganese carbonate ore in Shaodong, Hunan and other places is difficult to develop and utilize sulfur-containing carbonaceous black shale manganese carbonate ore, which has become a "chicken rib" in the manganese industry.

Method used

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  • Method for preparing manganese sulfate by using sulfur-containing carbonaceous manganese carbonate ore
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  • Method for preparing manganese sulfate by using sulfur-containing carbonaceous manganese carbonate ore

Examples

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Effect test

Embodiment 1

[0015] Embodiment 1 (the percentages described in the following examples are all by weight %)

[0016] 240g 100 mesh sulfur-containing carbonaceous manganese carbonate ore powder (Mn 10.7%, Mn 2+ 10.01%, Mn 4+ 0.11%) and 360g100 mesh pyrolusite powder (Mn 22.83%, Mn 2+ 0.54%, Mn 4+ 21.01%), mixed evenly, put into a ceramic crucible, put into a muffle furnace for roasting, the roasting temperature is 1000°C, the time is 30min, take it out, cool down, put it into the cake, add 3500ml of anolyte (the content of sulfuric acid is 33.82g / L), add 130g of sulfuric acid to make the actual acid consumption 110% of the theoretical value, acid leaching at room temperature (about 25°C) for 120min with stirring, filter, add ammonia water to the filtrate to adjust the pH to 3, filter to remove iron, add 2g to the filtrate Sodium formam, 4g sodium sulfide, stir evenly, filter, the filtrate is pure manganese sulfate liquid.

Embodiment 2

[0018] 200g80 mesh sulfur-containing carbonaceous manganese carbonate ore powder (Mn 10.7%, Mn 2+ 10.01%, Mn 4+ 0.11%) and 360g120 mesh pyrolusite powder (Mn 22.83%, Mn 2+ 0.54%, Mn 4+ 21.01%), mixed evenly, put into a ceramic crucible, put into a muffle furnace for roasting, the roasting temperature is 750°C, the time is 120min, take it out, cool down, put it into a sesame cake, add 3500ml of anolyte (the content of sulfuric acid is 33.82g / L), add 76g of sulfuric acid to make the actual acid consumption 90% of the theoretical value, raise the temperature to 50°C, pickle for 100min under stirring, filter, add ammonia water to the filtrate to adjust the pH to 4.5, filter to remove iron, add 2g of sulfide to the filtrate Ammonium, 4g ferrous sulfide, stir evenly, filter, and the filtrate is pure manganese sulfate liquid.

Embodiment 3

[0020] 200g 100 mesh sulfur-containing carbonaceous manganese carbonate ore powder (Mn 10.7%, Mn 2+ 10.01%, Mn 4+ 0.11%) and 200g100 mesh pyrolusite powder (Mn 22.83%, Mn 2+ 0.54%, Mn 4+ 21.01%) mixed evenly, put into a ceramic crucible, put into a muffle furnace for roasting, the roasting temperature is 850°C, the time is 90min, take it out, cool down, put it into the sesame cake, add 2500ml of anolyte (the content of sulfuric acid is 33.82g / L), add 52g of sulfuric acid to make the actual acid consumption 100% of the theoretical value, acid leaching for 120min under normal temperature stirring, filter, add ammonia water to the filtrate to adjust the pH to 6, filter to remove iron, add 3g of sodium sulfame to the filtrate, stir evenly, Filtration, the filtrate is pure manganese sulfate liquid.

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Abstract

The invention provides a method for preparing manganese sulfate by using sulfur-containing carbonaceous manganese carbonate ore. The method comprises the following steps: 1, uniformly mixing manganese carbonate ore powder and pyrolusite powder in proportion and carrying out roasting; 2, immersing the roasted ore obtained in step 1 with anolyte, or industrial sulfuric acid or a composition thereof and carrying out filtering so as to obtain a filtrate which is a leachate containing manganese sulfate; and 3, adding ammonia water into the leachate, then adding a vulcanizing agent into the filtrate and carrying out filtering so as to obtain another filtrate which is a manganese sulfate solution meeting requirements for further processing indexes of a manganese salt. According to the invention, reduction roasting of the pyrolusite is carried out by using reductibility of the sulfur-containing carbonaceous manganese carbonate ore which looks like coal, has a low grade of manganese (with manganese content of about 10%) and can hardly be separated by using magnetism, the pyrolusite can be successfully reduced without usage of a reducing agent in the process of roasting, and the integral graded of manganese is improved; and economic benefit assessment results show that cost for reduction roasting of the manganese carbonate ore and the pyrolusite is lower than that for reduction roasting of the pyrolusite and reduction coal and a substantial effect is obtained through reduction roasting of the manganese carbonate ore and the pyrolusite.

Description

technical field [0001] The invention relates to a method for preparing manganese sulfate from sulfur-containing carbonaceous manganese carbonate ore, which belongs to the field of metallurgy. Background technique [0002] Sulfur-containing carbonaceous black shale manganese carbonate is gray-black, looks like coal, has low manganese grade, and the manganese content is generally about 10%, which is almost impossible for magnetic separation. The main representative mines are manganese carbonate ores in Shaodong, Loudi, Shaoyang and other places in Hunan. The reserves exceed 20 million tons. Due to its relatively low manganese content, and a layer of oily substance will cover the liquid surface during chemical leaching, which hinders CO 2 The escaping of manganese carbonate ore in Shaodong, Hunan and other places is difficult to develop and utilize sulfur-containing carbonaceous black shale manganese carbonate ore, which has become a "chicken rib" in the manganese industry. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/08C22B47/00
Inventor 陈南雄陈发明黎贵亮邓永光韦婷婷明宪权何溯结梁敏许金精刘春明李红华吴贤图黄冠汉
Owner DAXIN MANGANESE MINE BRANCH OF CITIC DAMENG MINING IND
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