Place of Origin : Heze,China

Coltan ore processing is a rare metal with a content of 0.0002% in the earth's crust, which is often co-existed with niobium in nature. Many minerala Contain tantalum mineral content, but seldom tantalum mineral mine(Ta/Nb = 1), with industrial value of the main minerals are: coltan[(Fe, Mn) (Ta, Nb) 2 o6], heavy tantalite (FeTa2O6), microlite [(Na, Ca) Ta2O6 (O, OH, F)] and black thin gold [(Y, Ca, Ce, U, Th) (Nb, Ta, Ti) 2 o6], etc.https://www.oremagnetic-mining.com/others-mining-machine/