重庆某菱铁矿石磁化焙烧—磁选试验

为了确定重庆某高度氧化的菱铁矿资源的开发利用方案,采用磁化焙烧—磨矿—弱磁选工艺进行了选矿试验。结果表明:在磁化焙烧温度为800℃、焙烧时间为50 min、配碳量为10%、磁化焙烧产物的磨矿细度为-200目占88%、弱磁选磁场强度为119.43 k A/m的情况下,可获得铁品位为58.94%、铁回收率为76.38%的弱磁选精矿;弱磁选精矿中Al2O3、Mg O、Mn O的含量较高,是仅次于Si O2的影响精矿铁品位的因素,这些杂质有待后续反浮选试验脱除。

Magnetization Roasting-Magnetic Separation on a Siderite Ore from Chongqing

In order to confirm the utilization scheme of a highly oxidized siderite ore from Chongqing Province，the experimental study of the magnetic roasting-grinding-low intensity magnetic separation process was carried out.Under the conditions of roasting temperature at 800 ℃ for 50 min，the consumption of coal of 10%，the grind fineness of roasted product for 88% passing 200 mesh，low intensity magnetic separation of magnetic field intensity of 119.43 kA/m，low intensity magnetic concentrate with iron grade of 58.94%，and iron recovery of 76.38% were obtained.After SiO₂，the high contents of MgO，MnO and Al2O₃ in the weak magnetic separation concentrate are the factors that affect the iron grade of concentrate.