Hazard-free treatment technology for electrolytic manganese residues

A technology of harmless treatment and electrolysis of manganese slag, applied in the direction of improvement of process efficiency, etc., can solve the problems of large water consumption, impact on post-processing, high viscosity of electrolytic manganese slag and difficulty in pulping, etc., and achieve the effect of reducing waste

Active Publication Date: 2015-02-18
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that electrolytic manganese slag is highly viscous and difficult to be pulped in the harmless treatment process of electrolytic manganese slag in the prior art, which affects the subsequent post-treatment and consumes a lot of water for pulping, a kind of electrolytic manganese slag is provided. Harmless treatment process

Method used

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  • Hazard-free treatment technology for electrolytic manganese residues

Examples

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Embodiment 1

[0031] A harmless treatment process for electrolytic manganese slag, comprising the following steps,

[0032] (1) Utilize water high pressure to wash away the manganese slag, after making the manganese slag basically slurry, pour into the slurry tank and stir to obtain the manganese slag slurry, in terms of mass, the consumption of the water is 3 times of the manganese slag quality;

[0033] (2) Pressurize the manganese slag into the slurry into the filter chamber of the membrane filter press to filter to obtain a filter cake, and the filtrate returns to the step (1) to wash away the manganese slag under high pressure;

[0034] (3) Prepressing the filter cake, the precompression pressure is 0.3MPa;

[0035] (4) Under the pre-compressed state, inject the two-stage acid into the filter chamber to carry out the two-stage acid leaching of the filter cake, the pressure of the two-stage acid injection is 0.5MPa, and the injection rate of the two-stage acid is 30wt% of the filter ca...

Embodiment 2

[0043] A harmless treatment process for electrolytic manganese slag, comprising the following steps,

[0044] (1) Utilize water high pressure to wash away the manganese slag, after making the manganese slag basically slurry, pour into the slurry pool and stir to obtain the manganese slag slurry, in terms of mass, the consumption of the water is 4 times of the manganese slag quality;

[0045] (2) Pressurize the manganese slag into the slurry into the filter chamber of the membrane filter press to filter to obtain a filter cake, and the filtrate returns to the step (1) to wash away the manganese slag under high pressure;

[0046] (3) Prepressing the filter cake, the precompression pressure is 0.35MPa;

[0047] (4) Under the pre-compressed state, inject the two-stage acid into the filter chamber to carry out two-stage acid leaching to the filter cake, the pressure of the two-stage acid injection is 0.45MPa, and the injection rate of the two-stage acid is 40wt% of the filter cake...

Embodiment 3

[0055] A harmless treatment process for electrolytic manganese slag, comprising the following steps,

[0056] (1) Utilize water high pressure to wash away the manganese slag, after making the manganese slag basically slurry, pour into the slurry tank and stir to obtain the manganese slag slurry, in terms of mass, the consumption of the water is 3 times of the manganese slag quality;

[0057] (2) Pressurize the manganese slag into the slurry into the filter chamber of the membrane filter press to filter to obtain a filter cake, and the filtrate returns to the step (1) to wash away the manganese slag under high pressure;

[0058] (3) Pre-pressing the filter cake, the pre-pressing pressure is 0.4MPa;

[0059] (4) Under the pre-compressed state, inject the two-stage acid into the filter chamber to carry out the two-stage acid leaching of the filter cake, the pressure of the two-stage acid injection is 0.35MPa, and the injection rate of the two-stage acid is 60wt% of the filter ca...

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Abstract

The invention discloses a hazard-free treatment technology for electrolytic manganese residues. The technology comprises the following steps: washing the manganese residues in a high-pressure manner by using slurry water, and basically enabling the manganese residues to form slurry liquid; injecting the manganese residue slurry liquid into a filter chamber of a membrane press filter to be filtered to obtain a filter cake, and performing two-section acid leaching on the filter cake under a prepressing state; keeping the prepressing state, and injecting multi-stage washing liquid into the filter chamber to be washed in a multi-section manner; injecting alkali liquid of which the pH is 9 to 10.5 into the filter chamber to solidify manganese ions, and inflating the air into a filter liquid passage in a stage manner during the solidifying treatment; performing the high-pressure press filtering on substances in the filter chamber, and after the solidifying treatment is finished, discharging the residues. Through the adoption of the technology provided by the invention, the soluble manganese ions in the electrolytic manganese residues can be further extracted, and at the same time, the manganese ions in the filter cake are converted into the insoluble manganese to be deposited, so that the remained manganese ions in the waste residues cannot be permeated into the ground surface or the underground water to pollute the underground water resources in the stacking process.

Description

technical field [0001] The invention relates to a treatment process of metal slag, in particular to a harmless treatment process of electrolytic manganese slag. Background technique [0002] Electrolytic manganese slag is the manganese filter residue produced by adding sulfuric acid solution to manganese carbonate ore powder or manganese monoxide ore powder for electrolysis, that is, adding sulfuric acid solution in the reactor to react with manganese carbonate ore powder or manganese monoxide ore powder to generate manganese sulfate, and when the pH value is close to 4 When adding a small amount of reducing agent, the Fe in the solution 2+ Oxidize and hydrolyze the precipitate, then neutralize the excess acid with liquid ammonia, when the pH value is close to 7, add a vulcanizing agent to make the heavy metal ions in the solution generate corresponding sulfide precipitates, then filter with a filter press, and the filtrate enters the electrolytic cell Electrolysis, the dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B47/00
CPCY02P10/20
Inventor 潘涔轩刘闺华汝振广王雪婷朱克松赵博超窦广玉苑喜男
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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