某难选铁矿中性磁化焙烧-磁选试验研究

Test of Magnetizing Roast and Magnetic Concentration on Some Refractory Iron Mine Under Neutral Condition

在中性气氛中,对以菱铁矿为主的某复杂难选铁矿石进行了磁化焙烧-磁选工艺研究。试验结果表明,最优工艺条件为:焙烧温度700℃,焙烧时间60 min,磨矿细度95%-0.044 mm,粗选作业磁场强度均为151.24 kA/m,精选磁场强度39.80 kA/m。获得TFe品位55.55%,回收率72.01%的铁精矿。

Magnetizing roast and magnetic concentration was studied under neutral atmosphere on some refractory iron ore dominated by siderite .The test results show that the optimal technological conditions for calcination temperature are 700℃, 60 min magnetizing roast time ,grinding fineness 95%-0.044mm , magnetic field strength for roughing of 151.24 kA/m, magnetic field strength for selection of 39.80 kA/m.The iron concentrate TFe grade of 55.55%, and the recovery rate of 72. 01 %were gained under laboratory condition .