What is copper removal in copper electrolysis?

I’m not quite sure what you mean; please explain in more detail!

It mainly aims to balance the amount of main metal in the system (under open circuit conditions), remove impurities accumulated in the system, and improve and stabilize the acid balance of the system. To learn more in detail, it is recommended that the original poster look for relevant information on copper smelting in the resource sharing section of this forum for further study. This post was last edited by yunzhongwu6753 on 2008-12-31 16:52.]

I would like to understand the entire process of copper removal, the purposes of copper removal, and the requirements for equipment in this process. The two forums recommended by lcylidong are great and meet my needs perfectly; thank you. Also, thanks to pc030319 for their attention.

There is a book in the forum titled \"Revised Handbook of Non-ferrous Metallurgy Design – Copper and Nickel Volume\", which contains information on the general design principles and technical parameters related to copper removal.

After the electrolyte has been in circulation for a long time, impurities in it accumulate to such an extent that they affect the quality of the cathode copper produced. It is necessary to remove these impurities. Currently, the common method used in electrolysis plants is to open the circuit of the electrolyte and allow copper sulfate to crystallize, thereby removing the impurities. Another approach is to directly remove both the impurities and the copper.

As electrolysis proceeds, the anode undergoes non-electrochemical dissolution, while the cathode experiences electrochemical reduction. As a result, there is an imbalance between copper ions and acidity in the solution; therefore, it is necessary to include an insoluble anode (usually lead plates) in the electrolytic cell to absorb some of the copper ions and maintain equilibrium in their concentration.

During the copper electrolysis process, the current efficiency at the anode and the cathode is not equal; usually, the electrical efficiency at the anode is higher than that at the cathode. As a result, there is an excess of copper ions, leading to an increase in their concentration in the electrolyte. It is necessary to remove some of this copper through other methods. The common method is to periodically remove some of the electrolyte and extract the copper from it using chemical or electrochemical methods. For example, Jiangxi Copper Company periodically extracts a portion of the electrolyte and sends it to the electrowinning cells for electrolytic deposition, allowing copper ions to be deposited in stages at the cathode, resulting in electrolytic copper and malleable copper (electrowon copper with high impurity levels). Evaporation crystallization can also be used to cause copper sulfate to crystallize out, thereby producing bluestone.

Floor 9 explains its basic principles; more detailed information is described in the \"Manual for Heavy Non-ferrous Metallurgy Design – Copper and Nickel Volume\".

However, when there are few impurities, the electrowinning cell is usually connected in series with a normal electrolytic cell, which can also produce qualified electrolytic copper

If it can adapt to harsh environments, copper can be removed directly within the electrolyzer, provided that there is no need for impurity removal.