Comprehensive recycling method of zinc oxide powder

Abstract

The invention belongs to the field of zinc hydrometallurgy, and particularly relates to a comprehensive recycling method for zinc oxide powder. In order to solve the problems of low zinc and germanium recovery rate, relatively high production cost, complicated and tedious technology, high investment, low incoming and the like in zinc oxide powder recycling in the prior art, the invention provides a comprehensive recycling method for high-germanium zinc oxide powder. The method comprises the steps of one-stage aid leaching, two-stage acid leaching, tannin germanium deposition, neutralizing impurity removal, neutralizing filter residue washing, neutralizing filter liquor iron removal, filter liquor purification after iron removal and the like. The method provided by the invention is used for recycling the zinc oxide powder, so that the zinc and germanium recovery rate is greatly improved, the energy consumption of an electrolytic system is greatly decreased, and the method is environmentally-friendly.

Description

technical field [0001] The invention belongs to the field of zinc hydrometallurgy, and in particular relates to a method for comprehensive recovery and utilization of zinc oxide powder. Background technique [0002] Zinc concentrate is a limited resource. With the impact of the economic situation on the entire electrolytic zinc industry, the comprehensive recovery and utilization of valuable metals in zinc concentrate is particularly important in the entire industry. After the zinc concentrate is roasted, calcined sand is obtained, and the calcined sand enters the electrolytic zinc system to produce zinc ingots; the electrolytic zinc waste slag is volatilized in a rotary kiln to obtain zinc oxide powder. The process of wet electrolytic zinc determines that zinc oxide powder contains a large amount of Scattered, rare precious metals. The comprehensive recycling and utilization of various valuable metals in zinc oxide powder is the interest point of all electric zinc producti...

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problems of zinc oxide powder recovery and treatment process in the prior art, such as low recovery rate of zinc and germanium, high production cost, complicated and lengthy process, high investment and low return, the purpose of the present invention is to provide a comprehensive recovery process for zinc oxide powder Using the method, the recovery rate of zinc and germanium is greatly improved, the energy consumption of the electrolysis system is greatly reduced, and the method is friendly to the environment

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