Production method comprehensively utilizing high-zinc cobalt raw materials

Abstract

The invention relates to a production method comprehensively utilizing high-zinc cobalt raw materials. The method comprises the following steps that firstly, the high-zinc cobalt raw materials are subjected to reduction leaching, soluble valuable metals such as zinc and cobalt enter a solution, and solid-liquid separation is conducted; secondly, after solid-liquid separation, the solution is subjected to deironing through a jarosite method, the PH value is adjusted to 4.7+ / -0.2 at the same time, aluminum in the solution is precipitated to be removed in an aluminum hydroxide mode, and solid-liquid separation is conducted; and thirdly, the solution enters a P507 extraction tank, 20%-30% of a P507 extraction agent is adopted, caustic soda liquid is added, the saponification rate is controlled to be 50-60%, Zn2+ in the solution is extracted into organic phases, the organic phases are washed through dilute sulfuric acid, other metal ions are co-extracted and washed down, then the organic phases are subjected to reverse extraction, the Zn2+ enters aqueous phases from the organic phases through reverse extraction by means of a dilute sulfuric acid solution, and a high-purity zinc sulfate solution is generated, concentrated and crystallized into zinc sulfate monohydrate crystals.

Description

technical field [0001] The invention relates to a production method for comprehensively utilizing high-zinc and cobalt raw materials. Background technique [0002] At present, the methods for separating zinc and cobalt in the solution mainly include oxidation precipitation and solvent extraction. Among them, the oxidation precipitation method has problems such as large consumption of chemicals, long oxidation time, and high impurity content in the product; while the solvent extraction method has the advantages of fast reaction speed and short production cycle. , high recovery rate, good selectivity and other advantages, such as the separation and recovery method of nickel, cobalt, copper, manganese and zinc in a kind of electroplating sludge of patent publication number CN104060097A, adopts P507 as extraction agent, can remove electroplating sludge Cobalt, copper, manganese, zinc and other metal elements are simultaneously extracted into the organic phase, and then the organ...

AI Technical Summary

Problems solved by technology

Although the method of direct extraction and recovery of cobalt elements using P507 has a high recovery rate, which can reach more than 95%, the extraction ability of the extraction agent P507 is relatively strong, and it will extract cobalt, zinc and most other metal elements in the raw materials into the organic phase. , making the composition of the organic phase complex, resulting in the difficulty of subsequent separation of each metal element

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