Method for pretreating lead base inert anode for electro-deposit copper

Abstract

The invention relates to a method for pretreating a lead base inert anode for electro-deposit copper. A pretreatment solution comprises cobaltous sulfate, sulfuric acid and distilled water, wherein the temperature of the pretreatment solution is 30-70 DEG C; the anode is to be pretreated, a cathode is a stainless steel plate, space between the anode and the cathode is 3-6cm, the circulating quantity of the pretreatment solution is 0.05-0.5V groove/h, V groove represents the volume of a pretreatment groove; and the pretreatment process is as follows: the current density of the anode is 50-400A/m<2>, and the pretreatment time is 8-24h. By adopting the pretreatment solution containing the cobaltous sulfate, parameters of the pretreatment process are optimized. The pretreatment process is simple, is convenient for operation, is beneficial to industrial application, and can be used for controlling oxygen evolution overpotential of the lead or lead alloy inert anode for the electro-deposit copper to be within 550mV. The lead or lead base anode treated by adopting the method is used as an anode for the electro-deposit copper, and remarkable effects are obtained on the aspects of reducing the content of lead as impurity of the cathode copper and reducing electricity consumption per ton of copper.

Description

technical field [0001] The invention relates to a pretreatment method of lead or lead alloy inert anode for electrolytic copper, which is used for reducing the oxygen evolution overpotential of lead or lead alloy inert anode for electrolytic copper. The invention belongs to the technical field of inert anode matching for electrochemical metallurgy, and is an inert anode supporting technology with simple process and convenient operation, which can significantly reduce power consumption per ton of copper. Background technique [0002] Copper is an important pillar material in the development of national economy. In the past ten years, the average annual increase rate of my country's copper output has been above 10%. In 2009, the output of copper products was 8.884 million tons, ranking first in the world. According to the characteristics of copper resources, copper smelting methods can generally be divided into two types: fire method and wet method. The advantages of copper ...

AI Technical Summary

Problems solved by technology

At present, in the production process of copper electrowinning, almost all factories use Pb-Ca-Sn anodes, but the disadvantage of Pb-Ca-Sn anodes is that the oxygen evolution overpotential exceeds 700mV, resulting in the power consumption of copper electrowinning as high as 2000kWh / ton copper

Due to the high power consumption of copper electrowinning, the cost of the entire hydrometallurgy will increase, which is not conducive to the further promotion of copper hydrometallurgy technology in my country and the implementation of the national energy conservation and emission reduction strategy

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