黑龙江萝北某石墨矿石选矿试验

黑龙江萝北某鳞片状低品位石墨矿石矿物嵌布关系复杂,矿石硬度较大。为确定该资源的节能、高效开发利用方案,对有代表性矿石进行了选矿试验。结果表明,在粗磨磨矿细度为-0.074 mm占90.06%的情况下,以石灰(1 000 g/t)为黄铁矿抑制剂、煤油(460 g/t)为石墨捕收剂、2#油(70 g/t)为起泡剂进行1次粗选,粗精矿经5阶段再磨再选(最后一次再磨产品为2次连续精选),中矿1直接抛尾,中矿2、中矿3合并返回粗选,中矿4~中矿6返回与精矿1合并入再磨2的闭路流程处理该固定碳含量为13.12%的石墨矿石,可获得固定碳含量为97.50%、回收率为90.63%、-0.074 mm占76.70%的优质石墨精矿,达到GB/T3518-1995中石墨精矿最高质量等级标准。

Beneficiation Experiment of a Graphite in Luobei of Heilongjiang Province

Minerals in a low-grade flake graphite ore from Luobei County，Heilongjiang Province，owns complicated dissemination and great hardness.Beneficiation experiments on the representative samples were carried out，in order to high efficiently developing the ore with less costs.The results showed that with the primary grinding fineness of 90.06% passing 0.074 mm，lime (1 000 g/t) as depressor for pyrite，kerosene (460 g/t) as collector for graphite，2^# oil (70 g/t) as frother，the graphite with 13.12% of fixed carbon was treated.High quality graphite concentrate with fixed carbon content of 97.50%，recovery of 90.63% at fineness of 76.70% 0.074 mm was achieved through the closed circuit process of one roughing，five-stage regrinding and reconcentration (the last regrinding product was treated by two consecutive cleanings)，middlings1 discarding，middlings 2 and 3 mixed and then back to the roughing，middlings 4~6 combined with concentrate 1 and then into regrinding 2.The product can reach the standards of GB/T3518-1995.