某含金铁矿石选矿试验研究

要：某含金铁矿石属于变质沉积型铁矿石，主要金属矿物为赤铁矿和磁铁矿，还含有品位为1.09×10-6的金。金矿物嵌布粒度极细且赋存在赤铁矿物中，使得金与铁很难分离。经过“（粗磨）弱磁选+（细磨）浮选+中强磁选”的联合选矿工艺试验流程，得到含金品位53.37×10-6、金选矿回收率60.47%的金精矿，得到含铁品位64.41%、铁选矿回收率75.51%、产率62.06%的铁精矿，选矿技术指标较好。磨矿细度对金矿物的回收和弱磁性铁矿物都至关重要，为了降低磨矿成本，采用阶段磨矿和阶段选别较为有利。

An Experimental Study on Auriferrous Iron Ores

The auriferous iron ores belong to metamorphism deposit iron ores,with major metallic minerals of hematite and magnetite inside,and gold grade of 1.09×10-6.The mesh size of gold mineral is very fine and embed in hematite ,bringing more difficulty for mineral separation of gold and iron ores.In order to composite recovering the gold and iron minerals,the unite test circuit of ore dressing technology have been used,a good technique target of ore dressing have obtained,with gold concentrate contained gold grade of 53.37×10-6,recovery rate of 60.47% for gold;and iron concentrate contained iron grade of 64.41%,recovery rate of 75.51% for iron,productivity rate of 62.06% .The finer grinding for ore is very important for recovery of gold and weaker-magnetic iron-minerals. Milling and concentrate by stage are good methods for reducing cost of grinding.