Recovering treatment method of electrolytic manganese metal anode slime

A technology for electrolytic manganese metal, recycling and processing, applied in the direction of instrument, optics, process efficiency improvement, etc., can solve the problems of resource waste, increase production cost, environmental pollution, etc., and achieve the goal of reducing pollution, saving production cost, and reducing ore consumption. Effect

Active Publication Date: 2013-12-11
NINGXIA TIANYUAN MANGANESE LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, due to the difficulty in utilizing anode slag and the high content of impurities, the anode slag produced has not been recycled, resulting in waste of resources and increased production costs. The storage and discharge of anode slag have polluted the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take the electrolytic metal manganese anode slag, pour the anode liquid into the leaching tank as the bottom liquid, the weight ratio of the anode slag, concentrated sulfuric acid and oxalic acid is: 1:0.2-0.3:0.5-0.8, turn on the stirring paddle, start it after normal Put in sulfuric acid according to the calculated amount, and then put in anode slag and oxalic acid; 45 minutes after feeding, take samples and analyze until the residual acid reaches 2.22g / l, and perform solid-liquid separation; pH to 6.7, then add H 2 O 2 Oxidation and iron removal are carried out to detect micro-iron; after micro-iron is reached, heavy metals are removed by sulfidation, and solid-liquid separation is carried out after nickel-free detection, and the filtrate from pressure filtration enters the electrolytic cell to produce electrolytic manganese.

Embodiment 2

[0020] The anolyte is poured into the leaching barrel as the bottom liquid. Anode slag analysis results are as follows:

[0021] project Mn% MnO2% Mn4+% acid ore ratio Extraction rate% analysis results 40 — — 0.25 92

[0022] According to the prefabricated manganese content, calculate the amount of anode slag, sulfuric acid and oxalic acid, turn on the stirring paddle, start to add sulfuric acid according to the calculated amount after starting normally, and then put in anode slag and oxalic acid.

[0023] Feeding amount = (prefabricated manganese content - anode manganese content) * effective volume / anode slag manganese content * leaching rate

[0024] Acid feeding amount = (feeding amount * acid ore ratio) - (anolyte acid content * effective volume)

[0025] Feed oxalic acid amount = Feed amount / 1.5

[0026] 45 minutes after the end of feeding, take a sample and analyze until the residual acid reaches 2.22g / l, then carry out solid-liquid...

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PUM

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Abstract

The invention discloses a recovering treatment method of electrolytic manganese metal anode slime, and relates to a treatment method of electrolytic manganese metal anode slime in processing manganese metal with a wet process. The recovering treatment method is characterized in that during the recovering treatment, oxalic acid is used as a reducing agent, concentrated sulfuric acid and oxalic acid are used for reducing and leaching manganese in the anode slime, filter pressing is performed, and then leachate is neutralized, oxidized and sulfidized to obtain a manganese electrolyte. According to the recovering treatment method of the electrolytic manganese metal anode slime, oxalic acid is used as a reducing agent and concentrated sulfuric acid and oxalic acid are used for reducing and leaching the manganese in the anode slime, so that the anode slime is utilized fully and prevented from being discharged outside, the aim of recycling the anode slime is achieved, the pollution caused to environment is reduced, the use amount of ore is lowered and the production cost is saved.

Description

technical field [0001] The invention relates to a method for recovering and treating electrolytic manganese anode slag, which relates to a treatment method for electrolytic manganese anode slag in the process of wet production of metal manganese. Background technique [0002] In the production process of electrolytic manganese metal, a large amount of anode slag will be produced, and the anode slag produced is mainly composed of tetravalent manganese, and the manganese content reaches more than 40%. For a long time, due to the difficulty in utilization of anode slag and the high content of impurities, the anode slag produced has not been recycled, resulting in waste of resources, increased production costs, and the accumulation and discharge of anode slag have polluted the environment. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to address the shortcomings of the above-mentioned prior art, and to provide an electrolytic metal manganese anode s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/10C22B7/04
CPCY02P10/20
Inventor 贾天将
Owner NINGXIA TIANYUAN MANGANESE LIMITED
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