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Treatment method of wet method zinc smelting by-products

A technology of hydrometallurgy and treatment method, which is applied in the field of comprehensive utilization of non-ferrous metal resources and environmental protection, which can solve the problems of many secondary materials, long treatment cycle, complex treatment process, etc., which is beneficial to electrical conductivity and simplifies subsequent treatment process, the effect of increasing the contact area

Inactive Publication Date: 2010-09-08
河池市津泰资源再生有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the zinc oxide dust is leached, the cadmium is re-dissolved, and the cadmium is not recovered in the process, but only circulates in the system, repeatedly consuming acid and zinc powder, which increases the cost of producing zinc per ton
Generally speaking, the existing treatment process of zinc-copper-cadmium slag or copper slag is complicated, the treatment period is long, the types of chemical raw materials and equipment required are many, the intermediate by-products are many secondary materials, the consumption of zinc powder is large, and the production process There is a lot of metal zinc accumulated in the medium, and only coarse-grade products such as copper, zinc, and cadmium can be produced

Method used

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  • Treatment method of wet method zinc smelting by-products
  • Treatment method of wet method zinc smelting by-products
  • Treatment method of wet method zinc smelting by-products

Examples

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Effect test

Embodiment 1

[0026] This example provides a treatment method for the by-products of zinc hydrometallurgy. Sulfuric acid solution is used to leach heat-treated copper and cadmium slag, and then extract copper and cadmium from the leaching solution with an organic solvent extraction method to obtain an organic phase rich in copper and cadmium. and raffinate containing zinc sulfate. The organic phase rich in copper and cadmium is back-extracted with sulfuric acid to obtain a mixed solution of copper sulfate and cadmium sulfate, and then an appropriate amount of organic precipitant is added to the mixed solution to obtain a mixture of organic precipitation of copper and cadmium. After the copper and cadmium precipitates are separated and washed, a reducing agent solution is added to carry out a reduction reaction to obtain flake copper powder and organic cadmium products respectively. The raffinate containing zinc sulfate is added with an organic precipitant to obtain organic zinc.

[0027] S...

Embodiment 2

[0029]This embodiment provides a treatment method for the by-products of zinc hydrosmelting. First, copper slag, one of the by-products of hydrosmelting, is heat-treated in a rotary kiln, and then copper and cadmium are simultaneously extracted from the leachate by organic solvent extraction. A copper-rich, cadmium-rich organic phase and a raffinate containing zinc sulfate are obtained. The organic phase rich in copper and cadmium is back-extracted with sulfuric acid to obtain a mixed solution of copper sulfate and cadmium sulfate, and then an appropriate amount of organic precipitant is added to the mixed solution to obtain a mixture of organic precipitation of copper and cadmium. After the copper and cadmium precipitates are separated and washed, a reducing agent solution is added to carry out a reduction reaction to obtain flake copper powder and organic cadmium products respectively. The raffinate containing zinc sulfate is added with an organic precipitant to obtain organ...

Embodiment 3

[0032] This example provides a treatment method for the by-products of zinc hydrosmelting. First, heat-treat the copper cadmium slag, one of the by-products of hydrosmelting, in a rotary kiln, and then extract copper and cadmium from the leachate simultaneously by using an organic solvent extraction method. , to obtain a copper-rich, cadmium-rich organic phase and a raffinate containing zinc sulfate. The organic phase rich in copper and cadmium is back-extracted with sulfuric acid to obtain a mixed solution of copper sulfate and cadmium sulfate, and then an appropriate amount of organic precipitant is added to the mixed solution to obtain a mixture of organic precipitation of copper and cadmium. After the copper and cadmium precipitates are separated and washed, a reducing agent solution is added to carry out a reduction reaction to obtain flake copper powder and organic cadmium products respectively. The raffinate containing zinc sulfate is added with an organic precipitant t...

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Abstract

The invention discloses a treatment method of wet method zinc smelting by-products, which comprises the following steps: firstly, using a sulfuric acid solution for leaching heat treated copper-cadmium slag or copper-rich slag; then, using an organic solvent extraction method for extracting copper and cadmium at the same time from leach liquor to obtain copper-cadmium-rich organic phase zinc-sulfate-containing faffinate; using sulphuric acid for carrying out back extraction on the copper-cadmium-rich organic phase to obtain a mixed solution of copper sulfate and cadmium sulfate; then, adding a proper amount of organic precipitant into the mixed solution to obtain a mixture of organic precipitates of the copper and the cadmium; separating and washing the copper and cadmium precipitates; and adding a reducing agent solution for carrying out reduction reaction to respectively obtain sheet type copper powder and organic cadmium products. The invention realizes the value adding utilization of wet method zinc smelting by-products, reduces the treatment cost of the zinc smelting by-products, and reaches the goals of discharge reduction and yield improvement.

Description

technical field [0001] The invention relates to a treatment method for by-products of zinc hydrometallurgy, and belongs to the technical fields of comprehensive utilization of nonferrous metal resources and environmental protection. In particular, it relates to a method for value-added utilization of copper cadmium slag or copper slag produced in a zinc hydrometallurgy process. technical background [0002] In recent years, my country's zinc smelting industry has developed rapidly, and its output has ranked first in the world for many years. Among them, the output of hydro-smelting zinc accounts for more than 70% of the total zinc output. In the zinc hydrometallurgy process, in order to obtain high-quality metal zinc, and in order to improve current efficiency and reduce power consumption, it is necessary to purify and remove impurity ions Cu, Cd, Ni, Co, etc. in the electrolyte before electrolysis. In industrial production, the two-stage replacement method of zinc powder i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/08C22B3/38C22B15/00C22B17/00C22B19/00
CPCY02P10/20
Inventor 伍永田杨建广王继峰史文革阮靖远荣宝臻
Owner 河池市津泰资源再生有限公司
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