Electrowinning is a process in which metals such as gold, silver and copper are recovered from solution through an electrolytic chemical reaction--MECRU

What is electrowinning?

Electrowinning is a process in which metals such as gold, silver and copper are recovered from solution through an electrolytic chemical reaction. This happens when an electric current is passed through a solution.

During this process, the electrons in the current chemically reduce the metal ions, forming a solid metal compound at the cathode (the negatively charged electrode).

The metal is deposited in a form that is easy to melt. Metals are usually extracted from ores through a leaching process and placed in solution.

Advantages of electrowinning

Electrowinning is considered as a smart solution to extract metals from any solution.

Extracting metals from any solution requires extremely low power consumption;
Widely applicable to the extraction of most metals, including gold, copper, nickel and zinc;
The electrowinning solution is simple and economical;
Production is easy to set up and run.

Copper cathodes electrowinning process

The copper electrowinning process is very mature, and the cell voltage, current density, copper in the electrowinning tail solution, and sulfuric acid acidity can be selected according to the properties of the stripping solution (ie, the electrowinning stock solution), the existing equipment and technical conditions of the factory to formulate procedures. The operation process is relatively simple. According to the preset solution flow rate, the electrowinning stock solution enters the electrowinning tank for electrowinning, and the copper ions in the solution are gradually deposited on the initial electrode (cathode).

To guarantee the quality of copper cathodes, the following items needs to pay attention to:

Electrowinning is considered as a smart solution to extract metals from any solution.

Before the electrowinning stock solution enters the electrowinning tank, it is necessary to add a set of coarse-grained device to remove the residual organic phase to avoid black copper.
The concentration of divalent copper ions in the electrowinning tail liquid should not be lower than 10g/L, too low will seriously affect the quality of cathode copper.
The concentration of iron ions in the electrowinning solution should not be higher than 5g/L, because ferric ions can promote the dissolution of copper deposited on the cathode under electrowinning conditions, reducing the current efficiency.
The current density should not be too high. If the current density increases, the deposition rate of divalent copper ions on the cathode is too fast, so that the cathode copper is rough and even has a powdery structure.
A small amount of additives should be added in the electrowinning process, such as casein, thiourea (CH4N2S), animal glue, etc. The addition of a small amount of additives can make copper deposition more uniform, dense crystallization, and smooth surface.

Why Mecru?

Henan Mecru Heavy Industry Technology Co., Ltd. is located in Zhengzhou City, Henan Province. It is a professional large-scale intelligent crushing, mineral processing, and hydrometallurgical process equipment manufacturer, integrating R&D, production and sales.

As a promoter of the mineral processing industry and hydrometallurgical process, Mecru Heavy Industry has always been committed to providing users with good technology, design, engineering and services.

MECRU with its products and services of high quality and differentiation to achieve immortality, and to promote the process of enterprise brand promotion. Staff to good conduct for development, the pursuit of better quality is our unremitting efforts to the goal.

MECRU has a perfect pre-sale, sale, after-sales service, is committed to providing excellent service for customers. From international trade marketing and promotion to international trade negotiations, and to technical service and after-sales support, MECRU has gradually established its own trade service system, serving many countries and regions at home and abroad.

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