Didymium obtainment from rare earth oxides produced in Araxá, Brazil

Abstract:

Metallic Didymium was obtained at the São Paulo Institute for Technological Research (IPT), from didymium oxide, which was produced by solvent extraction of rare earth oxides processed from a rare earth concentrate produced by Companhia Brasileira de Metalurgia e Mineração – CBMM – from its niobium mine. Two routes were investigated, metallothermic and electrochemical reduction, both in molten salts. Both routes allowed didymium obtainment with 99% minimum purity, but the metallothermic route needs an additional processing step to remove the excess of reducing agent.


Reference:
FERREIRA NETO, João Batista; LANDGRAF, Fernando José Gomes; ETT, Gerhard; SANTOS, Célia Aparecida Lino dos; SILVA, André Luiz Nunis da; SILVEIRA, João Ricardo Filipini da; VIEIRA, Fabiana Yamasaki Martins; LUZ, Maciel Santos. Didymium obtainment from rare earth oxides produced in Araxá, Brazil. In: INTERNATIONAL WORKSHOP ON RARE-EARTH AND FUTURE, 24., 2016, Munique – Alemanha. Proceedings… 7 p.

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