Process for producing cathode copper by low-grade anode plates

Abstract

The invention relates to a process for producing cathode copper by low-grade anode plates. Low-grade high-nickel tin black copper is used as raw materials for direct electrolysis refining to prepare qualified cathode copper; through such modes as adjustment of process conditions, selection of reasonable current density, flow and temperature, adjustment of the additive ratio and adding of modifiedpolyacrylamide, the obtained cathode copper is higher in grade, smooth in surface, clear and compact in grain, uniform in thickness and beautiful; meanwhile, the purification and replacement period ofelectrolyte is prolonged, so that the production cost is greatly reduced when the recovery rate is increased; anode mud is treated by adopting ethyl acetate and phenolic resins, so that the problem of difficult gold and silver separation of the anode mud due to adding of polyacrylamide is solved, and the daily treatment quantity of the anode mud is increased; and copper sulfate crystal seeds areintroduced to accelerate separation of copper sulfate crystals, so that the recycling rate of metal copper and nickel is improved.

Description

technical field [0001] The invention provides a process for producing cathode copper from a low-grade anode plate, specifically a production process for producing cathode copper by using low-grade, high-nickel, and tin-black copper as raw materials, and involves recycling and comprehensive recycling of copper-containing solid waste materials technology. Background technique [0002] my country is short of copper resources, but the role of copper is inseparable from daily life and industrial production. Therefore, how to make the best use of limited copper resources is particularly important. In order to make up for the shortage of copper resources, my country has been devoting itself to the research on the redevelopment and utilization of copper-containing wastes for many years. There are a lot of copper-containing scraps produced in people's consumption process and industrial production process, and these copper-containing scraps can be used as secondary resources of copp...

AI Technical Summary

Problems solved by technology

[0003] The traditional process is to refine and purify the black copper anode furnace into sub-crude copper, then put the sub-crude copper into the anode furnace to smelt into the anode plate, and then electrolytically refine it into electrolytic copper. The production process is long, and copper, nickel, The utilization rate of tin is low, the loss is large, and the production cost is high, and the environmental pollution is large

[0004] However, due to the high impurities in low-grade copper, the amount of anode slime will also increase during the electrolysis process, which will easily cause uneven dissolution of the anode, thickening of the anode slime layer, increase the cell voltage, increase production energy consumption, and increase the anode slime It will cause poor settlement effect, and may cause a small amount of anode slime to adhere to the cathode plate, affecting the surface quality of cathode copper.

Therefore, it is essential to add additives to the electrolyte. Studies have shown that adding polyacrylamide to the electrolyte will improve the surface quality of cathode copper and increase the recovery rate of copper and nickel, but adding polyacrylamide will seriously affect Subsequent treatment of anode slime, especially the gold and silver separation process, greatly reduces the amount of anode slime processed daily

[0005] After long-term reaction, the electrolyte needs to be purified. Traditional purification is to directly evaporate the electrolyte to crystallize copper sulfate. The crystallization speed is slow, it takes a long time, the recovery of copper is low, and it will affect the recovery of nickel sulfate.