Purification device for ultrapure rare earth metals and method for purifying rare earth by utilizing same

Abstract

The invention discloses a purification device for ultrapure rare earth metals. The purification device comprises a furnace body, wherein a heating device is arranged at the bottom of the furnace body,and the furnace body also comprises a cooling plate, a gas outlet, a bottom feeding hole and a temperature control device. The invention also provides a method for purifying ultrapure rare earth by utilizing the purification device, comprising smashing, heating and cooling processes. The device disclosed by the invention is simple in structure and easy to disassemble and maintain, temperature control is accurate and controllable, and temperature control on different heating zones can be carried out according to different rare earth oxides, so that the aim of separating and purifying the rareearth metals is achieved; and the method provided by the invention is simple, process is easy to control, the whole process is short in period, environment-friendly and pollution-free, the prepared rare earth is high in purity, and 1-3 different rare earth oxides can be separated and purified at the same time. The device and method which are provided by the invention are applicable to preparationof the ultrapure rare earth metals.

Description

technical field [0001] The invention belongs to the field of new energy materials, and relates to a purification device for ultra-pure rare earth metals and a method for purifying rare earths using the device. Background technique [0002] Rare earth metals have become indispensable and important elements in modern new material systems due to their active chemical properties and good atomic co-solubility. At present, the fields that use rare earth metals as the main raw materials are mainly concentrated in the new energy material system, such as: rare earth hydrogen storage materials, rare earth permanent magnet materials and rare earth catalytic materials. Rare earth metals, especially ultra-pure rare earth metals, have attracted much attention as a "panacea" to improve the properties of metal materials, and have great development potential. [0003] At present, the production process of ultra-pure rare earth metals is mainly based on electrolysis. This process inevitably ...

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Problems solved by technology

[0003] At present, the production process of ultra-pure rare earth metals is mainly based on electrolysis. This process inevitably produces a large amount of dust and toxic and harmful gases, and is affected by the electrolysis environment and equipment. The produced elemental rare earth metals usually contain a large amount of transition metal impurities and Other rare earth element impurities make it very easy to cause unstable product performance when used as an additive, and this method cannot be mass-produced industrially

In addition, the rare earth oxides are heated by coal and mountain grass in the kiln to melt the impurities and finally leave the rare earth products. However, this method is difficult to control the temperature, and the kiln cannot accurately control the temperature and different rare earth oxides. The resulting rare earth purity is not high, the product quality is poor, the rare earth recovery rate is low, resources are wasted, and environmental pollution is serious

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