某高硅铜硫矿石分选试验

Concentration Tests for a High Silicon Copper-sulfur Mine

广西某高硫铜矿石中滑石等易浮硅质矿物含量高,现场采用弱磁选—浮铜—浮硫工艺流程进行分选,除弱磁选能较好地回收磁黄铁矿外,黄铜矿浮选和黄铁矿浮选均因易浮硅质矿物的干扰而难以获得合格精矿。为此,在大量探索试验的基础上,采用弱磁选—黄铜矿和硅质矿物混合浮选—混浮精矿铜硅摇床分离—混浮尾矿浮黄铁矿的工艺流程处理该矿石,获得了磁选硫精矿硫品位和回收率分别为38.69%和64.48%,浮选硫精矿硫品位和回收率分别为44.57%和30.99%,铜精矿铜品位和回收率分别为13.87%和63.89%的良好试验指标,有效地综合回收了铜、硫矿物。

A certain high-suffur copper ore in Guangxi contains high content of easy floating siliceous mineral, such as talc. The process of low intensity magnetic separation-copper floating-sulfur floating is carried out on the field. There, except for pyrrhotite well recovered by weak magnetic separation,it is difficult to obtain the qualified concentrate from flotation of chalcopyrite and pyrite due to the interference of silica minerals. Based on a large number of tests, the process of low in- tensity magnetic separation-mixing flotation of chalcupyrite and siliceous minerals-shaking table separation for mixing flotation of silicon and copper concentrate - mixing flotation of pyrite from tailings is adopted to treat this ore. By this way, sulfur concentrate with S grade and recovery of 38.69% and 64. 48% by magnetic separation, and 44. 57% and 30.99% by flotation, and copper concentrate with Cu grade and recovery of 13.87% and 63.89% are realized respectively. So the copper and sulfur minerals can be effectively recovered.