白云鄂博磁选铁精矿提铁降氟试验  

Tests on Iron Improvement and Fluoride Removal in Flotation of Magnetic Iron Concentrate in Bayan Obo

作　　者：康德伟 李解[1] 李保卫[1] 张伟[1] 许晓乐 张超[1] 

机构地区：[1]内蒙古科技大学白云鄂博矿多金属资源综合利用重点实验室,内蒙古包头014010

出　　处：《金属矿山》2017年第9期78-81,共4页Metal Mine

基　　金：内蒙古自然科学基金项目(编号:2015MS0559;2014MS0521)

摘　　要：白云鄂博磁选铁精矿中的主要成分是磁铁矿,另有少量赤铁矿、菱铁矿和褐铁矿,主要脉石矿物是萤石、石英、黑云母、长石等,铁品位为54.50%,氟含量为2.40%,铁在-0.076 mm粒级有明显的富集,氟在+0.076 mm粒级有富集现象,其中的铁矿物和萤石矿物解离程度较好。针对该磁选铁精矿铁含量较低、氟含量较高的问题,进行了反浮选脱氟提铁试验。结果表明,以GE-28为萤石矿物浮选的捕收剂,在20℃下采用1粗1精、尾矿合并扫选后返回流程处理试样,获得了铁品位为62.42%、铁回收率为90.51%、氟含量为0.42%的铁精矿,较好地完成了对磁选铁精矿的提铁降氟。The main component of magnetic iron concentrates in Bayan Obo is magnetite,and also a small amount of hematite,siderite and limonite. And the main gangue minerals are fluorite,quartz,biotite,feldspar etc. For the feeding iron ore with the iron grade of 54. 50% and fluoride content of 2. 40%,iron has obviously enriched at-0. 076 mm particle size and fluorite has obvious enriched at ＋ 0. 076 mm particle size. The iron and fluoride minerals have a better dissolution degree. In view of lower iron and higher fluoride in magnetic iron concentrate,reverse flotation experiment for fluoride removal and iron improvement are carried out. The results showed that with GE-28 as a collector in flotation of fluoride minerals,iron concentrate with iron grade of 62. 42%,the iron recovery rate 90. 51% and fluoride content of 0. 42% was finally obtained by the closedcircuit process of one roughing,one cleaning and one scavenging with tailings at 20 ℃. By this process,the performance of iron improvement and Fluoride removal can be better realized for magnetic iron concentrate.

关 键 词：磁选铁精矿 反浮选 萤石 脱氟 

分 类 号：TD923.7[矿业工程—选矿]