Coltan processing technology developed for Africa . - Mining WeeklyNov 4, 2016 . The use of tantalum in manufacturing is currently limited, owing to the high cost of the metal, as a result of the expensive processing methods.tantalum mining methods,extraction and separation of tantalum and niobium from .niobium and tantalum by solvent extraction and preparation of pure niobium .. 2 Experimental methods: It describes the methods and materials used. 3 Results.
tantalum mining methods