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Method for previously removing copper from copper-containing solution

A copper solution and removal technology, which is applied to the pre-removal of copper from copper-containing solution and the separation of copper in non-ferrous metal smelting, which can solve the problems of increased copper cadmium slag, unfavorable production costs, copper loss, etc.

Active Publication Date: 2011-02-09
ZHUZHOU SMELTER GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the copper content in the zinc sulfate solution is higher than 350 mg / l, the amount of copper and cadmium slag increases during the primary purification process, resulting in intensified redissolution of cadmium, which ultimately affects the quality of the new solution. The consumption of zinc powder is also increased (3 to 5 times the content of copper and cadmium), which is not conducive to the control of production costs
At the same time, due to the influence of copper in the solution on the purification, the copper recovery rate is low, and nearly 60% of the copper is lost with the volatilization of kiln slag every year.

Method used

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  • Method for previously removing copper from copper-containing solution
  • Method for previously removing copper from copper-containing solution
  • Method for previously removing copper from copper-containing solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Chemical composition of zinc sulfate solution: Zn 140g / l, Cu 0.33g / l, Cd 0.92g / l, Fe 0.02g / l, specific production situation of copper removal by coagulator + primary purification process and traditional primary purification process for copper and cadmium removal See Table 1:

[0038] Table 1 The comparison between the present invention and the traditional primary purification process for removing copper and cadmium and the consumption of zinc powder

[0039]

[0040] Find out from Table 1: the present invention compares with traditional one-time purification process cadmium removal effect and zinc powder consumption, and the cadmium content of the outlet liquid of the two primary purification tanks is almost the same, and the liquid cadmium content after the pressure filtration is also similar, and the cadmium content of the pressure filtration process is similar. The redissolving multiples are more than 5 times, and the zinc powder consumption is the same when the q...

Embodiment 2

[0042] Chemical composition of zinc sulfate solution: Zn 152g / l, Cu 0.56g / l, Cd 0.83g / l, Fe0.015g / l, specific production situation of copper removal by coagulator + primary purification process and traditional primary purification process for copper and cadmium removal See Table 2:

[0043] Table 2 The comparison between the present invention and the traditional primary purification process for copper and cadmium removal effect and zinc powder consumption

[0044]

[0045]

[0046] Find out from Table 2: the present invention compares with traditional primary purification process cadmium removal effect and zinc powder consumption, and the cadmium content of the outlet liquid of both primary purification tanks is almost the same, but the liquid cadmium content latter is a part of the former after a pressure filtration The redissolution ratio of cadmium in the first filtration process of the coagulator pre-removal of copper + the primary purification process is 6.11 times,...

Embodiment 3

[0048] Chemical composition of zinc sulfate solution: Zn 130g / l, Cu 0.82g / l, Cd 1.02g / l, Fe0.025g / l, specific production situation of coagulator removal of copper + primary purification process and traditional primary purification process of copper and cadmium removal See Table 3:

[0049] Table 3 The comparison between the present invention and the traditional primary purification process for removing copper and cadmium and the consumption of zinc powder

[0050]

[0051] It can be seen from Table 3 that the coagulator pre-removal of copper + primary purification process is compared with the traditional primary purification process in terms of cadmium removal effect and zinc powder consumption. The latter is more than twice that of the former. The redissolution ratio of cadmium in the first filtration process of the coagulator pre-removal of copper + primary purification process is 6.44 times, while the redissolution ratio of cadmium in the first filtration process of the tr...

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Abstract

The invention discloses a method for pre-removing copper from a solution containing copper. The method includes the following steps: A, a zinc sulfate solution the copper content of which is equal or more than 350mg / l is induced into a puddler by a pump from the bottom part of the puddler; B, additive accounting for 0.8 to 1.1 times of the content of copper in the zinc sulfate solution is added and reacted with the zinc sulfate solution after the additive is pulpified; C, the copper content of a copper-removed overflow after the reaction is controlled between 100 and 200mg / l and the solid content is controlled between 8 and 16g / l; purifying and cadmium removing treatments are carried out on the copper-removed overflow after the reaction; and D, a deposit after the reaction is discharged from the bottom part of the puddler. The method can selectively pre-remove the copper in the zinc sulfate solution in the forms of generating pure copper or cuprous oxide deposit and can stably controlthe copper content of the copper-removed solution to be between 100 and 200mg / l for achieving the demand of one-time purification on the copper content of the solution. The method is especially suitable for large zinc metallurgy factories.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal smelting, in particular, the invention relates to a method for separating copper in non-ferrous metal smelting, more specifically, the present invention is a method for pre-removing copper from a copper-containing solution. Background technique [0002] The impurity copper in the zinc sulfate solution in the hydrometallurgy process mainly comes from the zinc concentrate, the copper grade of the zinc concentrate generally fluctuates between 0.2% and 1.6%, and the copper content of the zinc sulfate solution is correspondingly 100mg / l~1300mg / l l above fluctuations. When the copper content in the zinc sulfate solution is higher than 350 mg / l, the amount of copper and cadmium slag increases during the primary purification process, resulting in intensified redissolution of cadmium, which ultimately affects the quality of the new solution. The consumption of zinc powder is also increased (3 to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/46C22B19/00
CPCY02P10/20
Inventor 陈二云谷卫胜彭晓明李敦华唐宏文
Owner ZHUZHOU SMELTER GRP