菱铁矿与赤铁矿和石英间相互作用能

摘要

Hematite,siderite,and quartz are the main ores existed in the stepped flotation system of Donganshan carbonate-containing iron ore.The microgranular siderite was adhered in coarse grained hematite and coarse quartz surface because of the different kinds of interaction between mineral grains,which determined its attribution in concentrate and tailings.Flotation practice showed that a large amount of 0.010 mm microgranular siderite adsorbed in coarse grained hematite and coarse quartz surface,changed the surface properties of ore grain,and deteriorated the reverse flotation of the hematite sorting indicators seriously.The interaction energy between the fine grain siderite and coarse quartz,hematite were calculated on the basis of the ternary mixed ore flotation of hematite,quartz,and 0.010 mm siderite with different quality score.Therefore,the attribution of concentrate and tailings in the flotation process were analyzed from the aspect of mechanics,which provided theoretical basis for the effective dispersion of fine grained siderite,coarse hematite,and coarse quartz.%鞍山式含碳酸盐铁矿石“分步浮选”体系中存在的主要矿粒有赤铁矿、菱铁矿、石英,各种矿物颗粒间的相互作用力导致微细粒菱铁矿粘附在粗粒赤铁矿和粗粒石英表面,这些矿粒间的相互作用决定了其在精矿和尾矿中的归属.浮选试验表明,大量-0.010 mm微细粒的菱铁矿吸附在粗粒赤铁矿和粗粒石英表面,改变了矿粒的表面性质,严重恶化了赤铁矿反浮选的选别指标.在不同质量分数-0.010 mm菱铁矿与赤铁矿和石英的三元混合矿浮选试验基础上,进行了微细粒菱铁矿和粗粒赤铁矿、粗粒石英间的相互作用能计算,从力学层面对浮选过程中精矿与尾矿的归属问题进行分析,为微细粒菱铁矿和粗粒赤铁矿、粗粒石英的有效分散提供理论依据.