Rare earth purification method and electric heating furnace

Abstract

The invention discloses a rare earth purification method and an electric heating furnace. A rare earth raw material is heated in the electric heating furnace for purification, and the purification process comprises the following three heating phases: moderate-temperature heating at 480-520 DEG C for 35-45 minutes, high-temperature heating at 950-1000 DEG C for 35-45 minutes and low-temperature heating at 180-220 DEG C for 35-45 minutes. The rare earth purification method disclosed by the invention adopts electric heating, and can accurately control the heating temperature and thoroughly remove impurities; the product has high rare earth purity, and the purity can be up to 82%; and the production process is green and environment-friendly.

Description

[technical field]

[0001] The invention relates to rare earth purification, in particular to a rare earth purification method and an electric furnace. [Background technique]

[0002] The traditional rare earth purification method uses kiln production, and uses wood, mountain grass or coal as fuel to heat the raw materials, so that the impurities in the rare earth raw materials are melted and sublimated, and finally the rare earth products are left. The method of removing impurities in rare earth raw materials by heating in a kiln is difficult to control the temperature and the removal of impurities is not thorough, the purity of the rare earth products obtained is not high, and the quality of the products is poor; in addition, the recovery rate of rare earths is low, which can only reach 20-25%, which is a serious waste of resources , and the environmental pollution is very serious. [Content of the invention]

[0003] The technical problem to be solved by the invention is ...

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