四川某微细嵌布铁矿石选矿试验

四川某铁矿床为沉积矿床,原矿含铁39.93%,铁矿物主要为磁赤铁矿,有少量磁铁矿,它们嵌布粒度微细,并以群体状与绿泥石等黏土矿物混杂,完全解离困难,而且其单矿物含铁量不高。为了给开发该铁矿资源提供依据,在多方案比较的基础上,采用在-0.074 mm占55.37%粗磨条件下1粗1扫磁选抛尾—粗选精矿再磨至-0.074mm占95.02%后精选—扫选精矿和精选尾矿合并再磨至-0.045 mm占95.27%后再选的工艺流程进行选矿试验,最终获得了产率为54.22%、铁品位为61.02%、铁回收率为82.86%的综合铁精矿。

Mineral Processing Test on a Fine Disseminated Iron Ore from Sichuan

A iron ore from Sichuan in China is sedimentary deposit containing 39.93% of iron.The major occurrence of iron ore is maghemite, accompanied with a small amount of magnetite.The disseminated grain size of iron minerals is ultra-fine, and iron minerals are associated closely with clay minerals such as chlorite in group.The full liberation of maghemite is extremely hard to be obtained and iron content in single minerals is lower.In order to provide the basis for the development of the iron ore resources, and on the basis of multi-program comparison, with the grinding fineness of -0.074 mm 55.37%, iron concentrate with the yield of 54.22%, Fe grade of 61.02%, and Fe recovery of 82.86% was obtained through the process of tailing discarding by one rounding and one scavenging, regrinding of rough concentrate to -0.074 mm 95.02% and then cleaning, regrinding of joint of scavenging concentrate and cleaning tailings to -0.045 mm 95.27% and then re-concentration.