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A method for preparing high-purity manganese sulfate from electrolytic manganese sulfide slag

A technology of sulfide slag and electrolytic manganese, applied in the direction of improving process efficiency, etc., can solve the problems of cobalt soap pre-liquid waste and cumbersome process, etc., achieve the effects of reducing acid consumption, simple and feasible process, and improving leaching rate

Active Publication Date: 2021-08-24
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this invention is: after adopting the complex technological process, only the enriched slag containing cobalt and nickel is obtained, and the utilization of the enriched slag rich in cobalt and nickel needs further leaching-extraction process, resulting in cumbersome process
The disadvantage of this invention is that after the manganese-containing cobalt-nickel waste residue is leached, it is necessary to further use the oxidation precipitation method to remove impurities from iron and aluminum
The weak point of this invention is: extract copper, manganese with cobalt soap, first form sodium soap and then form cobalt soap, and the extraction ability of sodium soap is stronger than cobalt soap, causes the waste of unnecessary cobalt soap pre-liquid

Method used

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  • A method for preparing high-purity manganese sulfate from electrolytic manganese sulfide slag
  • A method for preparing high-purity manganese sulfate from electrolytic manganese sulfide slag

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preparation example Construction

[0038] (5) Preparation of high-purity manganese sulfate: get manganese sulfate solution to evaporate, concentrate, crystallize, and centrifuge to obtain high-purity manganese sulfate.

[0039] The composition detection of the electrolytic manganese sulfide slag adopted in the present invention is as shown in table 1:

[0040] Table 1

[0041]

[0042] According to the above method for preparing high-purity manganese sulfate, implement the following examples.

Embodiment 1

[0044] Crush and sieve 10g of electrolytic manganese sulfide slag and 17g of pyrolusite to 200 mesh, mix well, add 90g / L sulfuric acid solution according to the liquid-solid ratio of 10:1, feed oxygen 0.1Mpa, heat to 90°C, mechanically stir, and leaching 180min, the measured end point pH=3.0, filter, the leaching solution is adjusted to pH=0.5 with dilute sulfuric acid, and 30% P204+70% sulfonated kerosene is used to remove calcium according to the ratio O / A=1:1, wherein the saponification rate of the extractant is 20 %, extract for 10min, and then separate the liquid in a separating funnel to obtain a manganese-rich cobalt-nickel-magnesium solution after decalcification, then use sodium hydroxide to adjust the pH of the manganese-cobalt-nickel-magnesium solution to 3.5, and use 30% P204+70% sulfonation Kerosene is compared O / A=2:1 to the recovery of manganese-rich cobalt-nickel-magnesium solution manganese, wherein extractant saponification rate is 40%, extracts 10min, obtains...

Embodiment 2

[0046] Crush and sieve 10g of electrolytic manganese sulfide slag and 17g of pyrolusite to 200 mesh, mix well, add 90g / L sulfuric acid solution according to the liquid-solid ratio of 10:1, feed oxygen 0.2Mpa, heat to 90°C, mechanically stir, and leaching 180min, the measured end point pH=3.0, filtered, the leachate was adjusted to pH=1 with dilute sulfuric acid, and 20% P204+80% sulfonated kerosene was used to remove calcium according to the ratio O / A=1:1, wherein the saponification rate of the extractant was 30 %, extract 10min, and then separate liquids in a separating funnel to obtain a calcium-removing manganese-rich cobalt-nickel-magnesium solution, then use dilute sulfuric acid to adjust the pH of the water phase to 4.0, and use 30% P204+70% sulfonated kerosene according to O / A=2.5:1 reclaims manganese, wherein the extractant saponification rate is 30%, extracts for 10min, obtains the loaded manganese organic phase, and then uses 150g / L sulfuric acid to compare O / A=1:8 t...

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Abstract

The invention discloses a method for preparing high-purity manganese sulfate from electrolytic manganese sulfide slag, which is carried out according to the following steps: (1) crushing and sieving; (2) oxidation leaching; (3) decalcification: adding saponified P204 to the leaching solution Extraction with the first organic extractant formed by mixing with sulfonated kerosene to obtain a calcium-loaded organic phase and manganese-cobalt-rich nickel-magnesium solution; (4) Manganese recovery: take manganese-rich cobalt-nickel-magnesium solution, add saponified P204 and sulfonated kerosene Extraction with the second organic extractant formed by mixing to obtain a manganese-loaded organic phase and a cobalt-rich nickel-magnesium solution; take the manganese-loaded organic phase, add sulfuric acid for back extraction, and obtain a P204 organic phase and manganese sulfate solution; (5) High-purity manganese sulfate preparation. The invention has the advantages of being simple and feasible, capable of realizing the leaching of manganese sulfide, avoiding the generation of hydrogen sulfide gas, using the iron-precipitating process and using the fluoride ion precipitation method for removing calcium and magnesium ions.

Description

technical field [0001] The invention belongs to the fields of hydrometallurgy and clean metallurgy, and in particular relates to a method for preparing high-purity manganese sulfate from electrolytic manganese sulfide slag. Background technique [0002] Cobalt is an important industrial raw material. Electrolysis is a common method for producing manganese. The basic steps are: leaching manganese ore to obtain manganese-containing leachate, then neutralizing and removing iron, vulcanizing agent to remove heavy metals, and finally electrolyzing to obtain electrolytic manganese. In addition to heavy metals, a large amount of cobalt will also be precipitated in the form of cobalt sulfide, resulting in the loss of cobalt, so it is of great significance to recover the cobalt therein. At present, the treatment method of electrolytic manganese sulfide slag often adopts direct leaching with sulfuric acid, which is easy to generate toxic hydrogen sulfide gas. After leaching, the liqui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B47/00C22B7/00C22B3/08C22B3/38
CPCC22B3/08C22B7/007C22B47/00Y02P10/20
Inventor 陈进中曾军叶有明蔡井泉
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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