Extraction of Nb and Ta from a coltan ore from South Kivu in the DRC by ...
The extraction of Ta and Nb from coltan reserves involves various processes, however frequently operated under highly aggressive conditions. The most common routes are based on the use of hydrofluoric acid (Htwe and Lwin, 2008) and alkaline agents (Zhou et al., 2005a, Zhou et al., 2005b, Wang et al., 2009, El Hazek et al., 2019), and ...
