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Extraction of niobium and tantalum from ferrocolumbite by hydrofluoric acid pressure leaching

Rodriguez, Mario Humberto; Rosales, Gustavo Daniel; Pinna, Eliana Guadalupe; Suarez, Daniela Silvana (Elsevier Science, 2015-07)

Abstract Pressure acid leaching was used to extract niobium and tantalum from a ferrocolumbite ore. The leaching was carried out in a pressure reactor using hydrofluoric acid as leachant. Various parameters, such as ...

Acid leaching and thermal treatments in the obtaining of mixed oxides of Nb and Ta from ferrocolumbite

Oliveira, Tiago Fernandes; Souza, Carlson Pereira de; Moriyama, André Luis Lopes (Elsevier, 2021)

MINERALOGY OF ILMENORUTILE AND STRÜVERTTE FROM NORTHEASTERN BRAZILMINERALOGIA DE ILMENORRUTILO E STRÜVERITA DO NORDESTE DO BRASIL

ADUSUMILLI, MARIA S. (Sociedade Brasileira de Geologia, 2017)