安徽某镜铁矿石选矿试验

Beneficiation Test of Certain Specular Iron Ore in Anhui

安徽某镜铁矿含铁34.21%,铁主要以三氧化二铁形式存在,属弱磁性矿物。在开采过程中难免混入10%~15%围岩,造成矿物含SiO 240.28%。为适应市场需求,不断追求创新,LHGC型立环高梯度强磁选机不断在粗粒选矿应用方面寻求尝试,通过探索性试验确定了适宜-3 mm镜铁矿石的分选介质棒间隙为10 mm。镜铁矿石在粒度-3 mm的情况下入立环高梯度磁选机分选,通过直接入选试验和原矿分级后入选试验,获得了尾矿品位5.60%、8.72%和产率分别为20.70%、20.38%的良好分选指标。通过直径1 m立环半工业试验,获得了品位9.17%,产率为13.58%的合格抛除尾矿,为选厂降本增效奠定了良好基础。

The iron content of certain specular iron ore in Anhui is 34.21%,and iron mainly exists in the form of ferric oxide,which is a weakly magnetic mineral.In the mining process,it is inevitable to mix the surrounding rock of 10%~15%,resulting in SiO 2 content of 40.28%in minerals.In order to adapt to the market demand and continuously pursue the innovation,model LHGC vertical ring high-gradient high-intensity magnetic separator continuously seeks the attempt in the application of coarse-grain ore beneficiation.Through the exploratory experiments,it is determined that the suitable separation medium rod gap for-3 mm specular iron ore is 10 mm.Spectral iron ore with the size of-3 mm was sorted by the vertical ring high-gradient magnetic separator.Through the direct selection test and the selection test after the crude ore classification,obtain good separation index of the tailings grade of 5.60%and 8.72%and the yield was 20.70%and 20.38%respectively.Through the vertical ring semi-industrial test with the diameter of 1 m,the qualified discarded tailings with the grade of 9.17%and the yield of 13.58%are obtained,which lays a good foundation for reducing costs and increasing efficiency of the mineral plant.