微细粒铁尾矿浮选回收萤石工艺试验研究

Experimental Study on Flotation of Fluorite from Fine Particle Iron Tailings

某选铁尾矿细泥中含少量萤石矿物资源。基于工艺矿物学分析,本试验提出萤石磁浮联合工艺,实现了微细粒选铁尾矿中低品位萤石的高效回收。结果表明,铁尾矿-0.038 mm占比76.97%,经磁场强度636.8 kA/m强磁选可抛除42.89%磁性脉石矿物,CaF_(2)品位由13.91%提至21.04%;采用碳酸钠作为调整剂,酸化水玻璃为抑制剂,改性脂肪酸作为捕收剂进行浮选,最终获得产率为7.81%、CaF_(2)品位为90.72%、CaF_(2)回收率为50.94%的萤石精矿产品。

A small amount of fluorite is contained in the fine mud of a certain iron tailings.Based on process mineralogy analysis,this paper proposes a fluorite magnetic separation combined flotation process,which effectively recovers low-grade fluorite from fine-grained iron tailings.The results show that the iron tailings contain-0.038 mm proportion of 76.97%,can be removed 42.89%of magnetic gangue minerals through magnetic separation with magnetic field of 636.8 kA/m,increasing the CaF_(2) grade from 13.91%to 21.04%.Using sodium carbonate as adjusting agent,acidified water glass as inhibitor,and modified oleic acid as collector,fluorite concentrate product with a yield of 7.81%,CaF_(2) grade of 90.72%,and CaF_(2) recovery of 50.94%is finally obtained.