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Method for preparing electronic-grade manganese sulfate by utilizing ferro-manganese alloy furnace slag

A ferromanganese alloy, electronic-grade technology, applied in the direction of manganese sulfate, etc., can solve the problems of high cost and long impurity removal process, and achieve the effects of efficient recycling, simplified impurity removal process, and abundant raw material sources

Inactive Publication Date: 2013-09-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The preparation process of the above-mentioned high-purity manganese sulfate or high-purity manganese compound requires external agents to remove silicon impurities, and the impurity removal process is long and costly.

Method used

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  • Method for preparing electronic-grade manganese sulfate by utilizing ferro-manganese alloy furnace slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Grind ferromanganese alloy slag to a particle size of 250 Next, take 200g, put it into the leaching tank, slowly add 415g of sulfuric acid with a concentration of 50% by mass, turn on the stirrer, react and leaching at 80°C for 3 hours, and then filter. Heat the filtrate to 80°C, add sodium carbonate to adjust the pH of the solution to 6, hydrolyze the iron and aluminum ions in the solution to generate corresponding hydroxide colloids, cool the solution to 30°C, stir for 1 hour, and make the hydroxide colloids absorb the solution Impurities such as silicon and scandium in the filter are left to stand and filtered. The filtrate was heated to 95°C, the pH value was controlled to be 5, 36g of manganese fluoride was added, and the reaction was stirred for 2.5h to make the Ca in the solution 2+ , Mg 2+ Wait for the impurity ions to form insoluble fluoride precipitates, then add 15g of sodium sulfide, stir and react for 0.5h, make the heavy metal impurity ions in the solut...

Embodiment 2

[0028] Grind ferromanganese alloy slag to a particle size of 150 Next, take 200g, put it into the leaching tank, slowly add 350g of sulfuric acid with a mass percentage concentration of 60%, turn on the stirrer, react and leaching at 70°C for 2.5h, and then filter. Heat the filtrate to 90°C, add a certain amount of sodium carbonate, adjust the pH value to 6.5, and hydrolyze the iron and aluminum ions in the solution to generate corresponding hydroxide colloids, cool the solution to 40°C, stir for 2 hours, and make the hydroxide colloids Fully absorb silicon, scandium and other impurities in the solution, and then let it stand and filter. The filtrate was heated to 90°C, the pH was controlled to be 6, 33g of manganese fluoride was added, and the reaction was stirred for 2 hours to make the Ca in the solution 2+ , Mg 2+ Wait for impurity ions to form insoluble fluoride precipitates, then add 16.3g of sodium sulfide, stir and react for 1 hour, make heavy metals and other impuri...

Embodiment 3

[0031] Grind ferromanganese alloy slag to a particle size of 150 Next, take 200g, put it into the leaching tank, slowly add 430g of sulfuric acid with a mass percentage concentration of 50%, turn on the stirrer, react and leaching at 90°C for 2 hours, and then filter. Heat the filtrate to 80°C, add sodium carbonate to adjust the pH value of the solution to 6, so that the iron and aluminum ions in the solution are hydrolyzed to generate corresponding hydroxide colloids, the solution is cooled to 50°C, and stirred for 1.5h to make the hydroxide colloids fully Adsorb impurities such as silicon and scandium in the solution, and let it stand and filter. The filtrate was heated to 85°C, the pH value was controlled to 6.5, 39g of manganese fluoride was added, and the reaction was stirred for 1.5h to make the Ca in the solution 2+ , Mg 2+ Wait for impurity ions to form insoluble fluoride precipitates, then add 13.8g of sodium sulfide, stir and react for 1.5h, make heavy metals and ...

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Abstract

A method for preparing electronic-grade manganese sulfate by utilizing ferro-manganese alloy furnace slag comprises steps as follows: the ferro-manganese alloy furnace slag is ground to particles with particle sizes smaller than 250 mu m, sulfuric acid with the concentration of 30%-60% is added, and a solution is controlled to react for 1-3 hours at the temperature of 60 DEG C-90 DEG C and then filtered; the temperature of filtrate is controlled to be 60 DEG C-90 DEG C, sodium carbonate is added, and the pH value of the solution is adjusted to 4-6.5, so that iron ions and aluminum ions in the solution are hydrolyzed and generate corresponding hydroxide colloids; the solution is cooled to 30 DEG C-50 DEG C and stirred for 0.5-3 hours, so that the hydroxide colloids fully absorb silicon and scandium impurities in the solution, and still standing and filtration are performed; manganese fluoride is added to the filtrate to remove calcium and magnesium impurity ions, sodium sulphide is added to remove heavy metal impurity ions, and still standing and filtration are performed; the filtrate is concentrated, crystallized, washed, recrystallized, filtered and dried, so that an electronic-grade manganese sulfate product is obtained. According to the method, the ferro-manganese alloy furnace slag is taken as a raw material and used for preparing the electronic-grade manganese sulfate, so that the ferro-manganese alloy furnace slag can be recycled, pollution to the environment is reduced, and economic benefits can be obtained.

Description

[0001] Technical field: [0002] The invention relates to the recovery and utilization of ferromanganese alloy slag, in particular to a method for preparing electronic-grade manganese sulfate by using ferromanganese alloy slag. Background technique [0003] As an important basic raw material of manganese-based materials, electronic-grade manganese sulfate is of great significance to the development of my country's new generation of environmental protection and high-energy battery industry. With the rapid development of some high-quality and high-purity electronic chemicals such as electrolytic manganese, chemical manganese dioxide, and magnetic manganese tetraoxide, especially the rapid development of lithium-ion batteries, the demand for electronic-grade manganese sulfate is increasing. Manganese ore is the main raw material of manganese sulfate products. Although my country has abundant reserves, the manganese ore resources in my country are poor, miscellaneous and fine, an...

Claims

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Application Information

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IPC IPC(8): C01G45/10
Inventor 邱运仁闫升翟梦琪
Owner CENT SOUTH UNIV
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