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

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...

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