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Method for producing electrolytic manganese metal by using hydrogen peroxide to remove iron

A technology for the electrolysis of manganese metal and hydrogen peroxide, which is applied in the electrolysis process, electrolysis components, photography process, etc., can solve the problems of waste of resources, high cost, and low iron removal efficiency of manganese dioxide ore, and achieves saving in usage, convenient operation, and removal of iron. Iron efficient effect

Inactive Publication Date: 2011-09-07
CITIC JINZHOU METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of low iron removal efficiency, serious waste of resources and high cost of manganese dioxide ore, and provides a method for producing electrolytic manganese metal by removing iron with hydrogen peroxide

Method used

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  • Method for producing electrolytic manganese metal by using hydrogen peroxide to remove iron
  • Method for producing electrolytic manganese metal by using hydrogen peroxide to remove iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) First inject 200m into the compound tank 3 Anolyte, after stirring for 10 minutes, analyze the anolyte component Mn 2+ : 13.2g / L,H + :34g / L,(NH 4 ) 2 SO 4 : 108g / L.

[0021] (2) According to the analysis results, calculate 34 tons of silicomanganese slag with a percentage of 14% of total manganese and 10.2 tons of sulfuric acid to be added according to formulas (1), (2) and (3).

[0022] (3) Add the calculated required sulfuric acid into the compounding tank, and put the silicomanganese slag powder required for leaching into the compounding tank through a large bag.

[0023] (4) During the feeding process, the steam inlet valve can be opened to heat the material liquid in the compound tank through steam, and the reaction temperature of the material liquid is controlled at 85°C.

[0024] (5) Continue to stir for 3 hours, then take a sample and send it to a rapid laboratory analysis: Mn 2+ : 35.6g / L,H + :5.3g / L,Fe 2+ : 1.9g / L. Put the filtrate into the purif...

Embodiment 2

[0027] (1) First inject 200m into the compound tank 3 Anolyte, after stirring for 15 minutes, analyze the anolyte component Mn 2+ : 12.6g / L,H + :33.2g / L, (NH 4 ) 2 SO 4 : 103g / L.

[0028] (2) According to the analysis results, calculate 45 tons of silicomanganese slag and 20.4 tons of sulfuric acid with a percentage of total manganese of 10% to be added according to formulas (1), (2) and (3).

[0029] (3) Add the calculated required sulfuric acid into the compound tank, and put the silico-manganese slag powder required for leaching into the tank through the big bag.

[0030] (4) During the feeding process, the steam inlet valve can be opened to heat the material liquid in the tank through steam, and the reaction temperature of the material liquid is controlled at 80°C.

[0031] (5) Continue to stir for 3.5 hours, then take a sample and send it to a rapid laboratory analysis: Mn 2+ : 32.8g / L,H + :5.0g / L,Fe 2+ : 1.7g / L. Put the filtrate into the purification tank, then...

Embodiment 3

[0034] (1) First inject 200m into the compound tank 3 Anolyte, after stirring for 12 minutes, analyze the anolyte component Mn 2+ : 12.2g / L,H + :32g / L,(NH 4 ) 2 SO 4 : 104g / L.

[0035] (2) According to the analysis results, according to formulas (1), (2) and (3), it is calculated that 42 tons of silicomanganese slag with a percentage of total manganese of 12% and 16.7 tons of sulfuric acid should be added.

[0036] (3) Add the calculated required sulfuric acid into the compound tank, and put the silico-manganese slag powder required for leaching into the tank through the big bag.

[0037] (4) During the feeding process, the steam inlet valve can be opened to heat the material liquid in the tank through steam, and the reaction temperature of the material liquid is controlled at 83°C.

[0038] (5) Continue to stir for 3.2 hours, then take a sample and send it to a rapid laboratory analysis: Mn 2+ : 33.6g / L,H + :6.0g / L, Fe 2+ : 1.4g / L. Put the filtrate into the purifica...

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Abstract

The invention relates to a method for producing electrolytic manganese metal by using hydrogen peroxide to remove iron. The method comprises the following specific steps: an electrolytic manganese anode solution is added into a chemical combination tank and stirred, and then the contents of Mn2<+>, H<+>and (NH4)2SO4 are tested and analyzed; concentrated sulfuric acid and silicomanganese slag are added, and steam is introduced for heating during the feeding process; when the residual acid of sulfuric acid is 5-6 g / L, the filter pressing is carried out, the filtrate is pressed into a purification tank, and the content of ferrous iron in the filtrate is measured; hydrogen peroxide is added, and the added amount is the ferrous iron concentration multiplied by the feed liquid volume, therefore, the Fe2+ concentration in the feed liquid is lower than or equal to 0.001 g / l; then ammonia water is used for neutralization, and a purifying agent is diluted by water and then added into the feed liquid for purification; after stirring treatment, a sample is taken and sent to an express laboratory for analysis: if contents of Co, Ni and Zn are lower than or equal to 0.001 g / l, the filter pressing is carried out, and the filtrate is fed into a high-level liquid pool for standing; and electrolysis is performed by an electrolysis workshop, and the qualified electrolytic manganese metal can be obtained. The method has the advantages that the reaction time is short, the consumption of the purifying agent is saved, no influence on the subsequent electrolysis is caused, the cost is saved, the neutralization is performed, and the consumption of ammonia water is reduced.

Description

technical field [0001] The invention relates to a method for producing electrolytic metal manganese by using hydrogen peroxide to remove iron. Background technique [0002] Manganese dioxide ore is widely used in the electrolytic manganese industry to remove ferrous iron by oxidation. This method has the following disadvantages: [0003] (1) The utilization rate of manganese dioxide ore resources is low, the waste is serious, and the leaching yield is affected. According to the production practice, nearly 70-75% of manganese dioxide ore powder directly enters the filter residue and is wasted. [0004] (2) Due to the low utilization rate of manganese dioxide ore, the unused manganese dioxide ore directly enters the leaching slag. At present, domestic electrolytic manganese plants generally adopt the method of landfill for the treatment of leaching slag. As the amount of waste residue increases, it will intensify the pollution of soil and groundwater, and cause adverse effect...

Claims

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Application Information

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IPC IPC(8): C25C1/10C25C7/06
Inventor 齐牧崔传海于晓玲王云来李杰
Owner CITIC JINZHOU METAL