Most commercial extraction and refining processes for the preparation of niobium consist of a series of progressive operations which involves production of ferroniobium and reduced to niobium metal at last. Canada is known to be the second largest producer of this rare metal, contributing 9% to the world's iron production.
Jul 15, 2014· These minerals generate 185 million a year from the Congolese mines. Fluorspar. Also known as fluorite, this mineral is primarily mined in South Africa. Uses: This mineral is used in a variety of ways, including: In production of hydrofluoric acid, which is used in the pottery, ceramics, optical, electroplating and plastics industries