In the production of hydrometallurgy, when extracting rare metals, centrifugal extractor can be used for non-equilibrium extraction. The two-phase contact time in the centrifugal extractor is very short (a few seconds), so that one element with a fast mass transfer rate is extracted while the other element with a slow mass transfer rate is basically not extracted, thereby achieving the separation of the two elements. The centrifugal extractor has a much better separation effect than traditional mixer settler, extraction column and other equipment.
The CWL-M series centrifugal extractors launched by Zhengzhou Tiei Extraction are independently developed and have independent intellectual property rights. This centrifugal extractor is energy-saving and efficient, with a short residence time, rapid phase separation, high extraction efficiency, and saves investment costs and solvent recovery and regeneration costs.
Methods for Extracting Rare Metals
The currently used methods for rare metal extraction include precipitation, displacement, adsorption separation, extraction separation and other metal separation methods. Among them, extraction is one of the more effective methods, which uses the different distribution of solutes between immiscible liquid phases to achieve the purpose of extraction and separation. At the same time, liquid-liquid extraction separation can achieve rapid phase separation of two-phase feed liquid, high extraction efficiency, and save investment costs and solvent recovery and regeneration costs.
Taking the extraction of rare metal rhenium as an example, the traditional extraction method is difficult to handle. It is not only complicated to operate and costly, but also has low separation efficiency, causing huge waste of ore. Solvent extraction technology is a new and efficient method. Not only is the equipment simple and fast to operate, but it is also efficient, has a high recovery rate, good purity, and good selectivity. At present, it has become one of the mainstream methods for extracting rare metal rhenium. To extract rhenium from dirty acid, the sulfuric acid medium (containing 10-20% sulfuric acid, containing a small amount of chloride ions and fluoride ions), humidity 40-50℃, and the extractant is N235-sec-octanol-sulfonated kerosene system. In response to this highly corrosive extraction system, Zhengzhou Tiei Extraction has developed a new PVDF composite centrifugal extractor to solve the corrosion problem that may exist in traditional equipment.
In order to verify the effectiveness of this method, experiments are generally conducted before application. The experimental results show that the liquid-liquid extraction separation method has a good effect on the separation of rare metals. The CWL-M series centrifugal extractor launched by Zhengzhou Tiei Extraction is a liquid-liquid extraction and separation process. It has been widely used in the extraction of copper, uranium, rare earth metals, separation of nickel, cobalt, zinc, cadmium, zinc, iron, molybdenum, tin, platinum, palladium, tungsten, vanadium, manganese, antimony, lithium, rhenium, mercury and other rare metals and non-metallic elements.
Hydrometallurgy usually chooses multi-stage countercurrent or multi-stage cross-current extraction to achieve the ideal effect. For complete sets of rare metal extraction equipment CWL-M centrifugal extractor, welcome contact Tiei Extraction.
Email: sales@tieiextraction.com
Whatsapp: +86 19069612820
