CWL-M new centrifugal extractor in the extraction and separation of nickel and cobalt

Cobalt and nickel are widely used in the electronic field. With the development of industry, the market prospect of cobalt and nickel is huge. Because the physical and chemical properties of cobalt and nickel are very similar, it is difficult to directly recover them by classical methods such as chemical precipitation or oxidation, and they need to be separated in advance.

In the field of nickel-cobalt separation, solvent extraction is widely used. Nickel-cobalt solvent extraction equipment is currently used more centrifugal extractors and mixing and settling tanks. Among them, the extraction tank has relatively mature technology and is currently in use. However, due to the poor phase separation effect, long clarification time, and entrainment of traditional equipment, many manufacturers are now considering replacing the original extraction tank with a new centrifugal extractor.

The CWL-M new centrifugal extractor launched by TIEI Extraction can reduce the stock of material and liquid in the equipment and improve the separation efficiency during the process of extracting nickel and cobalt. Moreover, when the Liquid Liquid Centrifugal Extractor device is used to extract nickel and cobalt from the solution, due to the high mixing intensity, the material can reach an equilibrium state in a very short residence time, the energy consumption is greatly reduced compared with the traditional mixing and settling tank, and the processing capacity is increased. At the same time, the centrifugal extraction device has a small amount of internal material, fast phase separation, good effect, and avoids emulsification. At present, the models of centrifugal extractors used in the field of hydrometallurgy are: CWL150-M, CWL250-M, CWL350-M, CWL450-M, CWL550-M, CWL650-M, CWL900-M.

TIEI Extraction CWL-M new centrifugal extraction nickel-cobalt process system mainly includes extraction and back-extraction sections, the specific process flow is as follows:

At present, the nickel sulfate extraction project of Jinchuan Group is using Zhengzhou TIEI CWL-M series new Liquid Liquid Centrifugal Extractor. The entire technological process in this project is divided into five sections: extraction, pickling, stripping, and regeneration. The washing and high stripping flow ratio (o/A) can enrich the cobalt chloride solution to >1209l/, Co/iN>100000. The extracted nickel sulfate product has high purity, the solvent can be fully recycled, and the environment of the production workshop is also greatly improved, which is in line with the national call for energy conservation and environmental protection.