| 摘要 |
A tantalum and niobium bearing concentrate is produced from a tantalum and niobium bearing ferro-alloy, containing tantalum and niobium as carbide, by treating the ferro-alloy in molten state with a controlled amount of an oxidizing agent such as oxygen in order to slag tantalum and niobium, and by separating the so obtained slag phase from the metal phase. The ferro-alloy contains enough iron to have at least most of the tantalum carbide dissolved in the molten ferro-alloy. |
