山西某赤、褐铁矿选矿试验研究

山西某铁矿主要铁矿物为褐铁矿和赤铁矿,脉石矿物主要为铝土矿、高岭石、云母、胶磷矿等。铁矿物嵌布粒度细,与脉石矿物呈胶结物状胶结在一起,单体解离困难,属极难选铁矿。针对山西该铁矿采用镜铁矿配矿,镜铁矿与赤、褐铁矿比例为2∶5时,采用摇床一次粗选、一次精选,精选尾矿返回粗选的闭路流程,可获得铁品位60.15%,回收率52.28%的良好技术指标。

Study on the Beneficiation Technology of a Hematite-Limonite Ore of Shanxi

Iron minerals in an iron ore of Shanxi are mainly limonite and hematite, and gangue minerals are mainly bauxite, kaolinite, mica, phosphate rock and so on. The ore is characterized by fine dissemination size of iron minerals, embedding with gangue minerals, being difficult to dissociate, so it belongs to refractory iron ores. Specular iron ores are mixed with this Shanxi iron ore. When the ratio of Specular iron and hematite-limonite was 2∶〖KG-*2〗5, an iron concentrate grading of 60.15% at a 52.28% recovery was obtained through a closed-circuit flow of one-roughing with shaking tables, one-cleaning, and tailing concentrate back to the rough beneficiation.