Refining device and method for high-purity rare earth metal

Abstract

The invention discloses a refining device and method for high-purity rare earth metal. The device comprises an electron beam generation device, a cavity, a box-type water cooling copper die, an insulation board, high-purity tantalum joints, an oxygen-free copper electrode base and a voltage-stabilized power source. The electron beam generation device is arranged above the cavity. A working platform for refinement is placed at the bottom of the cavity. The box-type water cooling copper die is placed on the working platform. The insulation board is laid on the inner side wall and the bottom of the box-type water cooling copper die. The rare earth metal is placed on the insulation board. The high-purity tantalum joints making tight contact with the left end and the right end of the rare earth metal are embedded in the insulation board. The oxygen-free copper electrode base is connected with a wire outside the cavity. The other end of the wire is connected with the voltage-stabilized power source. Electron beams released by the electron beam generation device punch the rare earth metal at the lower portion. The device is adopted in the method for refining rare earth. The device fully integrates the beneficial effects of three refining methods, so that smelting time is greatly shortened, and the purity of a target product is high.

Description

technical field [0001] The invention relates to a metal purification device and method, more specifically to a high-purity rare earth metal purification device and method. Background technique [0002] Together with scandium and yttrium of the same group, lanthanides are called rare earth elements and play a pivotal role in the development of the national economy. High-purity rare earths usually refer to rare earth metals or compounds with a purity higher than 99.99%, and are mainly used in optical, electrical, magnetic and other functional materials. With the development of cutting-edge science and technology such as electronics, optics and optoelectronics, the demand for high-purity rare earth metal materials is increasing day by day. In order to develop new properties of rare earth metals and their compounds, people put forward higher purity requirements for raw materials, requiring the content of impurities to be at the μg / g level or even lower. One of the key factors ...

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Problems solved by technology

[0010] In order to solve the problems existing in the prior art that the purity is difficult to reach the standard, other impurities are easily introduced in the purification process, and the purification time is too long, the present invention provides a zone melting-electromigration-electron beam-rare earth purification device and method, making full use of three The advantages of the purification method, so that the smelting time is greatly reduced, the target product obtained is high in purity, and it is more convenient to be popularized and applied in production practice

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