High ferroalloy treatment process

Abstract

The invention discloses a high ferroalloy treatment process which comprises the following steps: (1) selecting dissolved iron, namely carrying out a reaction on high ferroalloy powder and a post-electrodeposition liquid returned by a copper electrodeposition system in a liquid-solid ratio of (5:1)-(30:1), wherein Cu<2+> in the post-electrodeposition liquid and Fe in the alloy react, so that almost Fe in the alloy powder enters into the solution in a form of Fe<2+> while Cu<2+> in the solution is converted into single substance Cu powder; (2) oxidizing and selecting leached copper, cobalt and nickel, namely supplementing a proper amount of sulfuric acid into the solution obtained by dissolved iron reaction, the copper powder and the alloy powder till the acid concentration of the solution is 0.5-4mol / L and adding an additive at the same time, and jointly conveying to a leaching reaction kettle to oxidize and leach, wherein the use level of the additive is 5-15g / L and the additive can be salts of ammonium salt, manganese salt and chlorides; (3) carrying out electrolytic deposition of copper and electrolytic decoppering, namely oxidizing and selecting to obtain sulfate of copper and cobalt without Fe and directly entering into the copper electrodeposition system to be electrodepositioned so as to obtain standard cathode copper; (4) extracting cobalt from a post-decoppering liquid.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and in particular relates to a new process for treating high-iron copper-cobalt alloys. Background technique [0002] High-iron alloy is an alloy or metal compound that contains not less than 3% iron and contains one or more valuable metals such as copper, nickel, cobalt, etc. through pyromelting. The purpose of processing such raw materials is to separate and purify valuable metals to obtain corresponding metal or salt products. [0003] The key problem of wet treatment of high iron alloy is to remove impurity metal Fe in the process of metal separation and purification. The existing process is to crush the alloy first to obtain finer alloy powder, and then leaching in the acidic medium solution, so that all the soluble metal components in the alloy enter the solution in the form of ions, especially the impurity iron also enters the leaching solution. After that, the leaching solution enters the...

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Problems solved by technology

The shortcoming of above-mentioned traditional treatment method is, the one, can not fully leach copper sulfide composition in the alloy, and the direct recovery rate of copper is low; It is enriched in the electrolyte and reduces the current efficiency of copper electrowinning; Fourth, removing iron from the raffinate requires a large amount of alkali, oxidant and energy, and the cost of iron removal is very high

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