A black mineral is an ore of niobium and tantalum.
一种黑色矿物是铌、钽矿石。
The machine is widely used in classification Tungsten, Tin, Tantalum, Niobium, Rare Metals, Noble Metals, Iron, Manganese Ore and Coal ore, it is the main equipment of gravity concentration.
广泛应用于钨、锡、钽铌、稀有金属、贵重金属、铁、锰矿石和煤矿石的选别，是重力选矿的主要设备。
The breakeven grade of tantalum for Yichun Tantalum-niobium mine is determined by the analysis of the profit and loss, and the strategy on the black-spot ore exploration is proposed.
通过盈亏平衡分析，确定宜春钽铌矿盈亏平衡品位，提出黑斑矿的处理方案。
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