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Method for leaching manganese from electrolytic manganese anode residues through sulfuric acid curing

A technology for anode slag and electrolytic manganese, which is applied in the field of manganese leaching by sulfuric acid aging of electrolytic manganese anode slag, can solve the problems of high manganese leaching cost and secondary pollution, and achieve the effects of improving the leaching rate, improving the utilization rate and widening the source.

Active Publication Date: 2020-02-28
JISHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the present invention provides a method for leaching manganese by sulfuric acid aging of electrolytic manganese anode slag, which has the advantages of wide source of reducing agent, low price, simple process, high manganese leaching rate, low operating cost, and no secondary waste residue pollution and exhaust gas pollution and other advantages, which can effectively solve the problems in the prior art such as high manganese leaching cost and secondary pollution during the leaching process.

Method used

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  • Method for leaching manganese from electrolytic manganese anode residues through sulfuric acid curing
  • Method for leaching manganese from electrolytic manganese anode residues through sulfuric acid curing
  • Method for leaching manganese from electrolytic manganese anode residues through sulfuric acid curing

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Embodiment 1

[0032] A method for leaching manganese from electrolytic manganese anode slag with sulfuric acid, specifically including the following steps:

[0033] (1) Weigh 1Kg electrolytic manganese anode slag, 0.16Kg sulfur powder and 1Kg concentrated sulfuric acid (mass concentration> 95%);

[0034] (2) Add sulfur powder and concentrated sulfuric acid to the electrolytic manganese anode slag, stir until the mixture is uniform; heat to 125°C and mature for 20 hours to obtain clinker;

[0035] (3) Adding water to the clinker to adjust the slurry to a liquid-solid ratio of 2:1, stirring and leaching for 1 hour at room temperature, and filtering to obtain manganese-containing leaching solution and leaching residue. The leaching rate of manganese is 92.0%.

Embodiment 2

[0037] A method for leaching manganese from electrolytic manganese anode slag with sulfuric acid, specifically including the following steps:

[0038] (1) Weigh 1Kg electrolytic manganese anode slag, 0.16Kg sulfur powder and 1Kg concentrated sulfuric acid (mass concentration> 95%);

[0039] (2) Add sulfur powder and concentrated sulfuric acid to the electrolytic manganese anode slag, stir until the mixture is uniform; heat to 150°C and mature for 20 hours to obtain clinker;

[0040] (3) Adding water to the clinker to adjust the slurry to a liquid-solid ratio of 2:1, stirring and leaching for 1 hour at room temperature, and filtering to obtain manganese-containing leaching solution and leaching residue. The manganese leaching rate was 95.6%.

Embodiment 3

[0042] A method for leaching manganese from electrolytic manganese anode slag with sulfuric acid, specifically including the following steps:

[0043] (1) Weigh 1Kg electrolytic manganese anode slag, 0.16Kg sulfur powder and 1Kg concentrated sulfuric acid (mass concentration> 95%);

[0044] (2) Add sulfur powder and concentrated sulfuric acid to the electrolytic manganese anode slag, stir until the mixture is uniform; heat to 150°C and mature for 24 hours to obtain clinker;

[0045] (3) Adding water to the clinker to adjust the slurry to a liquid-solid ratio of 2:1, stirring and leaching for 1 hour at room temperature, and filtering to obtain manganese-containing leaching solution and leaching residue. The leaching rate of manganese is 97.8%.

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Abstract

The invention discloses a method for leaching manganese from electrolytic manganese anode residues through sulfuric acid curing. The method specifically includes the following steps that the electrolytic manganese anode residues, sulfur powder and concentrated sulfuric acid are weighed according to requirements and used for standby application; the sulfur powder and the concentrated sulfuric acidare added in the electrolytic manganese anode residues and evenly mixed, and clinker is obtained through the curing reaction; and water is added in the clinker to conduct leaching, and a manganese-contained leaching solution and leaching residues are obtained after liquid-solid separation. The method has the advantages that the source of reducing agents is wide, the price is low, the process is simple, the manganese leaching rate is high, the operation cost is low and no secondary waste residue pollution or waste gas pollution is caused, and the problems that in the prior art, the manganese leaching cost is high and secondary pollution is generated in the leaching process can be effectively solved.

Description

Technical field [0001] The invention relates to the technical field of hydrometallurgical waste slag recovery, and more specifically to a method for leaching manganese from electrolytic manganese anode slag through sulfuric acid curing. Background technique [0002] The anode slag of electrolytic manganese is the waste slag produced in the electrolytic metal manganese production process. The main component is manganese. The manganese dioxide content accounts for about 40-50%, and the lead content is also high, accounting for about 4-6%. Use of valuable secondary resources. However, the mineral composition and structure of the electrolytic manganese anode slag are complex, and the symbiotic relationship between lead and manganese hydrated oxide is very close, and it is difficult to separate manganese and lead by mechanical separation. Therefore, in addition to a small amount of ferromanganese and silico-manganese alloy smelting, most of them are dumped and have not been well deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B3/08C22B47/00
CPCC22B7/007C22B7/04C22B47/00Y02P10/20
Inventor 颜文斌朱长菊杨朝霞李红湘伍永国
Owner JISHOU UNIVERSITY
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