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Method used for purification copper removal of zinc sulfate leaching solution

A technology of leachate and zinc sulfate, applied in the direction of improving process efficiency, can solve the problems of long process route, high energy consumption and high production cost, and achieve the effect of simple process flow and low consumption

Active Publication Date: 2019-11-22
湖南仁发材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned method has high energy consumption, high production cost, and long process route. Due to the addition of other reagents, it will also cause certain losses to copper. The method process is relatively isolated, and it cannot produce synergistic benefits.

Method used

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  • Method used for purification copper removal of zinc sulfate leaching solution
  • Method used for purification copper removal of zinc sulfate leaching solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Pass the zinc sulfate leaching solution with chemical composition Zn150.70g / L, Cu0.95g / L, Fe0.15g / L, As0.25g / L, Sb0.71g / L with excess tinned copper scrap figure 1 After the process flow is purified, the copper-removing zinc sulfate leaching solution (Cu0.32g / L, As0.05 g / L, Sb0.03g / L, Fe0.04g / L) is obtained. There is no residual tin on the surface of the detinned copper scrap, the sponge copper contains less than 0.3% tin, the purification slag contains Sn18.72%, As1.57%, Fe1.4%, and the Cu content in the purification slag is less than 0.2%;

[0041] Wherein, each percentage represents the mass percentage content.

Embodiment 2

[0043]Take the zinc sulfate leaching solution whose chemical composition is Zn140.57g / L, Cu1.17g / L, As1.8g / L, Sb1.27g / L, Fe1.3g / L, use excessive tin-plated waste copper electronic feet, pass figure 1 After the process flow is purified, the copper-removing zinc sulfate leaching solution (Cu0.08 g / L, As0.07g / L, Sb0.03g / L, Fe0.01g / L) is obtained. Detinning waste copper electronic feet are completely detinned, the sponge copper contains tin <0.3%, the purification slag contains Sn13.77%, As1.0%, Sb0.83%, and the purification slag Cu content is less than 0.2%;

[0044] Wherein, each percentage represents the mass percentage content.

Embodiment 3

[0046] Get the zinc sulfate leaching solution that the chemical composition is Zn137.07g / L, Cu1.03g / L, Sb0.97g / L, As1.12g / L, Fe1.12 g / L, use excessive tinning waste copper wire, pass through Fig. 1 After purification of the technological process, the copper-removing zinc sulfate leaching solution (Cu0.11g / L, As0.009 g / L, Sb0.27g / L, Fe0.51g / L) is obtained, and the detinning waste copper wire has no apparent residual tin, and the sponge Copper contains tin<0.3%, purification slag contains Sn17.78%, As0.98%, Sb0.57%, Fe1.7%, and purification slag Cu content is less than 0.3%;

[0047] Wherein, each percentage represents the mass percentage content.

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Abstract

A method used for purification copper removal of a zinc sulfate leaching solution includes the steps that tinned copper waste and scrap are added in the zinc sulfate leaching solution, solid-liquid separation is conducted after reaction is finished, and leaching residues, a leaching solution and replacement residues are obtained; air or oxygen is blown into the leaching solution so that Sn2+ can be oxidized into Sn4+; and the pH value of the leaching solution is regulated to 4.5 to 5 so that the Sn4+ in the leaching solution can be converted into precipitate, solid-liquid separation is then conducted, and copper-removed liquid and tin-contained filter residues are obtained. The tinned copper waste and scrap are taken from solid waste such as urban mineral products or electronic waste and are directly used for purification copper, antimony, iron and arsenic removal of the zinc sulfate leaching solution, one of obtained products (the filter residues) is spongy copper capable of being directly used for copper electrolysis liquid preparation or thermometallurgy of copper, and resource, environment and economic benefits are obvious.

Description

technical field [0001] The invention relates to a method for purifying and removing copper from a zinc sulfate leaching solution, in particular to a method for purifying and removing copper from a zinc sulfate leaching solution in nonferrous metal hydrometallurgy and recycling tinned copper waste and debris. Background technique [0002] In non-ferrous metal extraction metallurgy, zinc calcine or other zinc-containing materials (such as zinc oxide-containing smoke) undergo intermediate leaching to produce a neutral leachate, which contains many impurities, such as Cu, As, Fe, Sb, Cd, Co , Ni, etc. These impurities are extremely harmful to the production of zinc sulfate or the zinc electrolytic deposition process. All harmful impurities must be removed through solution purification, and the qualified purified solution can be sent to the zinc electrolytic cell or used for the production of zinc sulfate. Chemical Products. [0003] At present, the method for purifying zinc sul...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B15/00C22B19/20C22B19/32
CPCC22B7/006C22B15/0091C22B19/20C22B19/32Y02P10/20
Inventor 肖驰名肖之晔
Owner 湖南仁发材料科技有限公司
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