Purification and dehydration device for anhydrous rare earth halides

Abstract

The invention provides a purification and dehydration device for anhydrous rare earth halides. The purification and dehydration device comprises a quartz tube and a mechanical vacuum pump, wherein a cover plate is arranged at the top of the quartz tube, a quartz material boat and a quartz collector are arranged in the quartz tube, one end of the quartz material boat is arranged in the quartz collector, and the mechanical vacuum pump penetrates through the cover plate and is connected with the quartz tube. According to the purification and dehydration device for anhydrous rare earth halides, heating outside resistance wire furnaces is adopted, the volume of a vacuum cavity is small, the high vacuum degree can be obtained in the production process, the production requirement can be met, and the product quality is improved.

Description

technical field [0001] The invention belongs to the field of rare earths, in particular to an anhydrous rare earth halide purification and dehydration equipment. Background technique [0002] High-purity anhydrous rare-earth halides are important chemical raw materials and the core raw materials for the preparation of high-purity rare-earth metals and a new generation of high-performance rare-earth scintillation crystals, and have extremely broad application prospects. However, during the preparation process, the rare earth halides are easily hydrolyzed to produce oxyhalides, which adversely affects the properties of the rare earth materials prepared by using the rare earth halides. For example, the absolute purity of rare earth halide raw materials in scintillation crystals cannot be lower than 99.95%, and the water and oxygen content must be less than 100ppm, so as to avoid harmful impurities such as oxides and oxygen ions during crystal growth, which will affect the optic...

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Problems solved by technology

Traditional equipment is used for production. Because the furnace body includes a heating element and has a large volume, the required vacuum degree cannot be reached during the operation process, the product is not dehydrated completely, and the product quality cannot meet the requirements.

In addition, in order to avoid mutual pollution of products, special furnaces must be used. If a variety of rare earth halides are to be produced, the investment in equipment is relatively large, and the production cost is relatively high.

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