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Method for separating copper, cobalt and manganese from cupric chloride manganese-cobalt-calcium-zinc impurity removal solution

A technology of copper, manganese, cobalt, calcium, zinc and copper, cobalt, and manganese chloride, which is applied in crucible furnaces, electric furnaces, drum furnaces, etc., to achieve the effects of low cost, short process and high metal yield

Active Publication Date: 2016-02-03
长沙百汇新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbonate precipitation—fire treatment is to first precipitate all the valuable metals in the solution with sodium carbonate, and then send them to the furnace for fire treatment. This treatment method has a low metal recovery rate, and the recovery rate of cobalt is less than 50%. , while all manganese is discarded by slagging
Although the N235 extraction method can separate manganese from zinc, cobalt, copper and other metals, the phase separation speed is relatively slow, the process is long, and it is not economically cost-effective, and N235 is highly volatile and has an unpleasant smell
The disadvantage of the pressurized crystallization method is that it requires high equipment and a long process.
The cost of sulfide removal process is high, only manganese can be extracted, and the sulfide formed by copper, zinc and cobalt is more difficult to handle
The electrolysis method has a large investment and low current efficiency

Method used

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  • Method for separating copper, cobalt and manganese from cupric chloride manganese-cobalt-calcium-zinc impurity removal solution

Examples

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Effect test

Embodiment 1

[0025] A method for separating copper-cobalt-manganese from the copper-manganese-cobalt-calcium-zinc impurity removal solution produced by the cobalt production system is operated according to the following steps:

[0026] Take 200mL of copper, manganese, cobalt, calcium and zinc chloride solution, its composition is copper 35.1g / L, manganese 122g / L, zinc 7.5g / L, calcium 12.2g / l, cobalt 13.8g / L. Add 18g of anhydrous sodium sulfate, stir and react for 30min, and remove calcium sulfate precipitate by suction filtration. Heat the solution to 70°C, add 21% sodium carbonate solution dropwise to pH 4.7, filter, wash the filter cake with a small amount of pure water, add 20mL of pure water to make slurry, add 98% concentrated sulfuric acid to dissolve, After evaporation and crystallization, 20.6 g of copper sulfate crystals were obtained. The direct yield of primary crystallized copper is 74.9%. The overall copper recovery was 97.5%.

[0027] Heat the solution after copper removal...

Embodiment 2

[0030] Take 200mL of copper, manganese, cobalt, calcium and zinc chloride solution, its composition is copper 43.8g / L, manganese 79.6g / L, zinc 3.9g / L, calcium 9.1g / l, cobalt 2.3g / L. Add 11 g of anhydrous sodium sulfate, stir the reaction for 30 minutes, and remove calcium sulfate precipitate by suction filtration. Heat the solution to 70°C, add 21% sodium carbonate solution dropwise to pH 5.1, filter, wash the filter cake with a small amount of pure water, add 20mL pure water to make slurry, add 98% concentrated sulfuric acid to dissolve, After evaporation and crystallization, 27.8 g of copper sulfate crystals were obtained. The direct recovery rate of primary crystallized copper is 81%. The overall copper recovery was 98.6%.

[0031] Heat the solution after copper removal to 70°C, add 0.9g of manganese powder, the cobalt ions are reduced to cobalt powder, filter and separate the cobalt powder, dissolve the cobalt powder with sulfuric acid to obtain a cobalt sulfate solution...

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Abstract

The invention relates to a method for separating copper, cobalt and manganese from a cupric chloride manganese-cobalt-calcium-zinc impurity removal solution. The method comprises the steps that sodium sulfate is added to the cupric chloride manganese-cobalt-calcium-zinc solution, and calcium sulfate is removed by filtration; then sodium carbonate is added to a solution obtained in step one, a pH value is adjusted to 4.0-6.0 to allow copper ions in the solution to be precipitated, and copper precipitates are obtained by filtration separation; the copper precipitates are dissolved with sulfuric acid and are subjected to evaporation crystallization to form copper sulfate crystals; manganese powder is added to a solution after copper removal to allow cobalt ions to be reduced to cobalt powder to be precipitated, and cobalt powder is obtained after the filtration separation and is dissolved with acid to form a cobalt solution; and a solution after cobalt removal contains manganese and a little zinc and calcium, manganese is precipitated through the evaporation crystallization or by adding sodium carbonate, and manganese salts such as rough manganese carbonate are obtained. With the adoption of the method, three main valuable metals, namely copper, cobalt and manganese, can be separated and extracted economically and conveniently.

Description

Technical field: [0001] The invention belongs to the field of three wastes treatment and circular economy, and specifically relates to a method for separating copper, cobalt, manganese from copper, manganese, cobalt, calcium and zinc impurity removal solutions Background technique: [0002] In the hydrometallurgical production of cobalt, the impurity metals in the cobalt raw material are removed in the P204 extraction process to form an acidic chloride solution containing a large amount of impurity metals such as copper, manganese, zinc, calcium and a small amount of cobalt. Copper and manganese are the most abundant metal ions in this copper-manganese chloride-cobalt-calcium-zinc solution. Although the content of cobalt is not high, the price of cobalt is very high. Therefore, the three metals with the highest value in the solution are copper, manganese and cobalt. A large-scale cobalt smelter produces this copper, manganese, cobalt, calcium and zinc chloride solution ev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/20C22B15/00C22B23/00C22B47/00
Inventor 朱远志
Owner 长沙百汇新材料科技有限公司
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