青海某低品位微细浸染型易泥化难处理金矿选矿试验研究

Study on flotation test for low-grade fine-disseminated and easily argillous refractory gold ore from Qinghai

青海某低品位微细浸染型易泥化难处理金矿石金大多呈显微和超显微分散状态包裹于毒砂和黄铁矿中,且易泥化矿物含量高,为37.07%。针对其矿石性质,采用矿泥分散+强化浮选工艺流程,获得了较好的试验指标:闭路浮选金精矿金品位37.56 g/t,金回收率85.57%。同时,通过回水循环利用,可有效节约水资源,减少药剂用量,降低生产成本。

One low-grade fine-disseminated and easily argillous refractory gold ore from Qinghai is wrapped in arsenopyrite and pyrite taking the form of microscopic and ultra microscopic scattering,and contains a number of easily argillous minerals which occupies 37. 07 %. According to the ore property,the paper adopts a process of ore and mud separation and intensified flotation,which generates a good test index; closed circuit obtains gold concentrates with gold grade of 37. 56 g / t and gold recovery of 85. 57 %. At the same time,the process,taking advantage of recycled water utilization,can effectively save water,reduce reagent consumption and lower production cost.