摘要
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。
In order to confirm the utilization scheme of a highly oxidized siderite ore from Chongqing Province,the exper-imental 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 concen-trate with iron grade of 58. 94%,and iron recovery of 76. 38% were obtained. After SiO2 ,the high contents of MgO,MnO and Al2 O3 in the weak magnetic separation concentrate are the factors that affect the iron grade of concentrate.
出处
《金属矿山》
CAS
北大核心
2015年第11期66-69,共4页
Metal Mine
关键词
菱铁矿
磁化焙烧
弱磁选
Siderite
Magnetic roasting
Low intensity magnetic separation
