某大理岩型石墨矿选矿工艺研究

Study on Mineral Processing Technology of a Marble Graphite Ore

某大理岩型石墨矿中大鳞片石墨含量较高,可选性较好。为了高效利用该石墨矿资源,进行了石墨矿鳞片保护选矿工艺研究。试验结果表明,在粗磨磨矿细度为-0.075 mm占45%的条件下,粗精矿四次再磨四次精选后筛分分级出+0.15mm精矿,-0.15mm产品经4次再磨5次精选后获得-0.15mm精矿。+0.15mm精矿产品固定碳含量为91.39%,回收率27.37%,-0.15mm精矿产品固定碳含量为94.06%,回收率63.57%,精矿固定碳总回收率为90.94%,该工艺可以有效保护大鳞片石墨。

The content of large flake graphite in a marble graphite ore is high and its washability is good.In order to efficiently utilize the graphite ore resources,the flake protection beneficiation process of graphite ore was studied.The test results show that under the condition that the grinding fineness of the coarse grinding is-0.075 mm accounting for 45%,+0.15 mm concentrate can be obtained by screening and classifying after four times of regrinding and four times of cleaning of the rougher concentrate,and-0.15 mm concentrate can be obtained after four times of regrinding and five times of cleaning of-0.15 mm product.The fixed carbon content of+0.15 mm concentrate is 91.39%,the recovery is 27.37%and the fixed carbon content of-0.15 mm concentrate is 94.06%,the recovery is 63.57%.So the total recovery of fixed carbon is 90.94%.The process can effectively protect large flake graphite.