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×矿是一个稀有金属矿山,开采的矿石成分很复杂,含有共生的铀、镭、钍等天然放射性元素,这些放射性元素,经过选矿过程得到富集,尤其是精选钽铌之后,天然放射性元素的品位急剧提高,从而辐射强度增大,构成了对操作人员的危害。 在原矿中,由于地质成矿的原因,不同矿带中含有的天然放射性元素的量有很大差别。在七带的原矿中含铀量为0.007％,含镭量为1.033×10~(-6)克/公斤,含钍量为0.005％。经过选矿富集获得的钽铌精矿中含铀量高达3.96％,电磁选尾矿最高达3.87％,富集了1000倍。由五、六带矿石铀的品位0.002％所获得的钽铌精矿中,铀的品位最高达
× Ore is a rare metal mine. The composition of the ore mined is very complex and contains natural radioactive elements such as uranium, radium and thorium. These radioactive elements are enriched through the beneficiation process. Especially after the selection of tantalum and niobium, natural radioactive elements The sharp rise in the grade, which increased radiation intensity, constitutes a hazard to the operator. In the ore, due to geological mineralization, the amount of natural radioactive elements contained in different ore belts is quite different. In the seven belts, the ore contains 0.007% of uranium, 1.033 × 10 ~ (-6) g / kg of thorium and 0.005% of thorium. The enriched tantalum and niobium concentrates obtained after beneficiation are as high as 3.96% of uranium and electromagnetically selected tailings up to 3.87%, which is enriched 1000 times. Uranium grades up to 0.002% from tantalum-niobium concentrates obtained from five-and six-zone ore uranium