Notable niobium - The Araxá niobium mine

Materials World magazine
,
1 Jan 2008

Michael Forrest visited the Araxá niobium mine in Brazil to learn about the metal's production. Current production capacity is around 80,000t. Of this, 70,000t is of standard grade ferro-niobium, 4,000t is of high purity oxide, 3,000t of vacuum grade ferro-niobium or nickel niobium, 300t of optical grade oxide and 210t of pure niobium.

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