Rare earth metallurgical methods

ere are two general methods of rare earth metallurgy, namely hydrometallurgy and pyrometallurgy.

Hydrometallurgy belongs to the chemical metallurgy method, and the entire process is mostly in solution and solvent. For example, the decomposition of rare earth concentrates, separation and extraction of rare earth oxides, compounds, and single rare earth metals use chemical separation processes such as precipitation, crystallization, oxidation-reduction, solvent extraction, and ion exchange. The most commonly used method is organic solvent extraction, which is a universal process for industrial separation of high-purity single rare earth elements. The hydrometallurgical process is complex, and the product purity is high. This method has a wide range of applications in producing finished products.

The pyrometallurgical process is simple and has high productivity. Rare earth pyrometallurgy mainly includes the preparation of rare earth alloys by silicothermic reduction, rare earth metals or alloys by molten salt electrolysis, and rare earth alloys by metal thermal reduction. The common characteristic of pyrometallurgy is production under high temperature conditions.

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Post time: Apr-27-2023