The centrifugal extractor uses tributyl phosphate to extract zirconium and hafnium from the nitric acid system. Zirconium and hafnium are important strategic materials. Zirconium and hafnium and their compounds are widely used in many fields such as national economy and national defense construction, especially in the nuclear industry and modern ceramics. Zirconium and hafnium always coexist in nature, and the two must be separated to obtain atomic-level zirconium and atomic-level hafnium.
The zirconium and hafnium extraction equipment is CWL-M centrifugal extractor. As for the extraction method, the solvent extraction method is currently used for the separation of zirconium and hafnium. In the wet extraction, tributyl phosphate is mainly used as the extractant. Its advantages are high separation factor, low reagent input and large extraction capacity.
During the operation, the zirconium (hafnium) chloride industrial product is dissolved in water to obtain a solution, alkali is added to precipitate, and then washed with water to remove chloride ions, and then dissolved with nitric acid to obtain a zirconium (hafnium) nitrate solution, and then tributyl phosphate is diluted with sulfonated kerosene to obtain an extractant. The two-phase solution is injected into the centrifugal extractor in a certain proportion, and the two phases are quickly mixed and dispersed through the impeller with the help of the rotation of the drum to complete the mixed mass transfer process. The mixed liquid enters the drum under the action of the vortex disk. Under the action of centrifugal force, the two-phase liquid is quickly separated and discharged from the body through different outlets to complete the two-phase separation process.
After repeated extraction experiments, it was found that the process of extracting and separating zirconium and hafnium from the nitric acid system using tributyl phosphate as the extractant is stable, without emulsification and three-phase product generation, and atomic-level zirconium and atomic-level hafnium can be obtained. In actual operation, after 10-level countercurrent extraction, 3-level countercurrent washing, 3-level countercurrent stripping and other processes, an organic product with a fairly high purity can be obtained.
Adding appropriate concentrations of sodium nitrate to the extraction system is conducive to the extraction of zirconium, and the residual water phase can be directly returned to prepare the extraction solution for recycling. The extraction process parameters are reliable, suitable for the purification of hafnium in the residual water phase in industrial applications, meeting the requirements of atomic-level hafnium for impurity zirconium, and can be used to prepare atomic-level hafnium.
Zirconium And Hafnium Extraction Equipment
Zirconium and hafnium extraction equipment recommends the use of the new CWL-M centrifugal extractor developed and produced by Zhengzhou Tiei Extraction. This equipment is developed to address the shortcomings of traditional centrifugal extractors, and its power consumption is only 10% to 30% of that of traditional annular gap machines. At the same time, the centrifugal extractor has a short stage retention time, rapid phase separation, high extraction efficiency, and saves investment costs and solvent recovery and regeneration costs.
There is no doubt that centrifugal extractors are effective in extracting zirconium and hafnium with tributyl phosphate. However, there are many models of CWL-M series centrifugal extractors, including small-scale laboratory centrifugal extractors, pilot-scale centrifugal extractors, and large-scale industrial centrifugal extractors. Customers can select equipment based on the processing volume. If you have any requirements, welcome contact us.
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