甘肃肃北某铁矿可选性试验  

Experimental Study on an Iron Ore in Subei Gansu

作　　者：王晓慧[1] 张丽军[1] 梁友伟[1] 

机构地区：[1]中国地质科学院矿产综合利用研究所,中国地质调查局金属矿产资源综合利用技术研究中心,国土资源部钒钛磁铁矿综合利用重点实验室,四川成都610041

出　　处：《矿产综合利用》2016年第3期58-62,共5页Multipurpose Utilization of Mineral Resources

摘　　要：甘肃肃北某铁矿嵌布粒度细,铁矿物分布粒度小于70μm;矿石中磁性铁矿物占64.29%,弱磁性铁矿物占30.68%,这给铁矿物的有效分选带来难度。针对该矿石特点,创新性的采用"三段磨矿-弱磁选-中矿强磁抛尾后焙烧-再磨弱磁选"的工艺流程进行选铁试验,结果为:铁精矿品位63.50%、回收率52.73%,铁富集物品位41.85%、回收率28.87%。尾矿品位降至8.25%。Thedissemination size of an iron ore in Subei Gansu was fine and the particle-size distribution was under 70urn. In the ore the magnetic ore was 64. 29% ,low-intensity magnetic ore was up to 30. 68%, so it was hard to effectively separate this iron. According to ore properties, the process of three-stage grinding-low intensity magnetic separation-roasting after high intensity magnetic separation for discarding tailings of middling-low intensity magnetic separation after regrinding was adopted. The iron ore concentrate with the grade of 63.50% and the recovery of 52. 73%was obtained and the iron concentration with the grade of and the recovery of 28. 87%. The grade of the tailings was decreased to 8.25 %.

关 键 词：磁铁矿 赤褐铁矿 磁选 焙烧 

分 类 号：TD923[矿业工程—选矿]