河北某铁尾矿选磷试验

Beneficiation of Phosphorus Ore from an Iron Tailing in Hebei

河北某选铁厂弱磁选尾矿中的含磷矿物主要为磷灰石,磷灰石矿物在细粒级和微细粒级中有明显的富集现象,且单体解离情况较好,具有综合回收价值。为了提高资源的综合利用率,降低磷矿物外排对环境造成的潜在威胁,对现场铁尾矿试样进行了浮选选磷试验。结果表明,试样磨至-0.074 mm占48%后,经1粗2扫4精、中矿顺序返回流程处理,最终获得了P2O5品位为34.65%,回收率为88.83%的磷精矿。

The main phosphorus-bearing mineral in low intensity magnetic separation tailings of an Iron Dressing Plant of Hebei is apatite. Since apatite minerals are enriched obviously in fine or mlcro-fine particles, and its degree of liberation are well, it has a comprehensive recovery value. In order to improve the comprehensive utilization of resources, and reduce the potential threats of phosphate ore efflux to the environment, flotation tests of phosphorus concentration for on-site iron tailings samples are carried out. The results show that under grinding fineness of -0.074 mm 48%, phosphorus concen- trate with P2O5 grade of 34.65% , and recovery of 88.83% is achieved by adopting the process of one-roughing, two-scav- enging, four-cleaning and middles back to the flow-sheet in turn.