Recycling method of zinc hypoxide

Abstract

The invention discloses a recycling method of zinc hypoxide, which comprises the following steps of a, conducting alkaline cleaning on zinc hypoxide with pure alkaline liquor to obtain zinc carbonate, b, leaching zinc carbonate in Step a, separating and obtaining leaching liquor and leaching slag, c, adding an oxidant to the leaching liquor to conduct deferrization treatment, separating and obtaining a purified solution, d, conducting three-stage purification treatment on the purified solution obtained in Step c, removing impurities, namely cadmium, copper, germanium and cobalt, in the solution, separating and obtaining a deep purified solution, e, conducting ion exchange treatment on the deep purified solution obtained in Step d, and removing fluorine and chlorine in the solution, and f, electrolyzing a solution obtained after ion exchange, and separating out zinc. The recycling method of zinc hypoxide can effectively remove fluorine, chlorine and other impurities contained in zinc hypoxide, and is low in operating cost.

Description

technical field [0001] The invention relates to the technical field of metallurgy and chemical industry, in particular to a method for recycling secondary zinc oxide. Background technique [0002] In the chemical smelting technology, the leaching slag produced by the wet zinc smelting plant and the lean zinc oxide ore are smoked in a rotary kiln to obtain sub-zinc oxide. The main component of sub-zinc oxide is ZnO, but the grade is generally 45%-65%. Secondary zinc oxide can be used as a waste secondary resource of zinc metal. At present, the recovery and utilization of zinc metal waste and its waste secondary resources in my country is in a self-flowing state, and no industry has formed. Secondary zinc oxide, as a secondary resource of zinc, has a very low recycling rate, which not only causes a serious waste of resources, but also brings serious pollution of the environment. [0003] The recycling method of secondary zinc oxide is mainly to leaching secondary zinc oxide b...

AI Technical Summary

Problems solved by technology

Dechlorination with silver salt, because silver sulfate is prepared and silver chloride is produced, the recovery rate of silver is only 85%, and silver is expensive, the process conditions are difficult to master, and the production is not easy to manage; dechlorination with copper slag, must be Add a large amount of Cu, the efficiency is not high, the process conditions are difficult to master, and the operating cost is high

The above two methods only remove chlorine but not fluorine, and an additional defluorination process is required, which complicates production and increases production costs.

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