Coltan Coltan (short for columbitetantalites and known industrially as tantalite) is a dull black metallic ore, from which the elements niobium and tantalum are extracted. The niobium dominan
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process flow for mining tantalite perkinspreschoolJun 18, 2018The columbite tantalite mineral group (Figure 1) is the most common group of processes, are also known (see Table 3 and Figure 3
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