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 . Obtenção de didímio metálico a partir dos óxidos de terras raras produzidos em Araxá, Brasil. In: CONGRESSO ANUAL DA ABM, 72., 2017, São Paulo. Anais… Rio de Janeiro: ABM WEEK 2017. p. 2282-2294.
Document is password protected, ask Customer Service/Library-DAIT/IPT. Log into BiblioInfo Biblioteca-DAIT/IPT to access the text in PDF:
https://escriba.ipt.br/pdf_restrito/174928.pdf
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 . Obtenção de didímio metálico a partir dos óxidos de terras raras produzidos em Araxá, Brasil. In: CONGRESSO ANUAL DA ABM, 72., 2017, São Paulo. Anais… Rio de Janeiro: ABM WEEK 2017. p. 2282-2294.
Document is password protected, ask Customer Service/Library-DAIT/IPT. Log into BiblioInfo Biblioteca-DAIT/IPT to access the text in PDF:
https://escriba.ipt.br/pdf_restrito/174928.pdf
