国内某铁精矿脱硫试验研究  

Experimental Study on Desulfurization of a Domestic Iron Concentrate

作　　者：姜志学 JIANG Zhixue

机构地区：[1]中国恩菲工程技术有限公司,北京100038

出　　处：《中国矿山工程》2024年第5期52-56,70,共6页China Mine Engineering

摘　　要：根据该磁铁矿型铜矿石中磁黄铁矿的原矿赋存特性及该矿铜铁回收过程中采用的“半优先半混合浮选铜+选铜尾矿再磨+磁选选铁+铁精矿浮选脱硫”的工艺流程特点,分析磁黄铁矿被石灰抑制的根本原因,通过试验研究优化磁黄铁矿浮选过程中的药剂制度。最终试验得出利用2 400 g/t的硫酸调浆,将脱硫浮选矿浆pH值调整到5.2,采用200 g/t的硫酸铜做磁黄铁矿活化剂,可有效活化被石灰抑制的磁黄铁矿;利用B-45做捕收剂、2^(#)油做起泡剂,经过五段开路浮选,可获得硫品位0.23%,铁品位65.34%,铁金属回收为83.22%的脱硫铁精矿。The research focuses on the inherent haracteristics of yrrhotite within magnetite-type copper ore and examines the unique eneficiation process applied for copper and iron recovery,comprising“semi-priority semi-mixed flotation for copper,regrinding of copper flotation tailings,magnetic separation for iron,and desulfurization flotation of iron concentrate.”It analyzes the fundamental reasons for the inhibition of pyrrhotite by lime.Through experimental investigations,an optimized reagent scheme for pyrrhotite flotation was developed.The experiments conclude that adjusting the flotation pulp to a pH of 5.2 with 2400 g/t sulfuric acid and employing 200 g/t copper sulfate as an activator for pyrrhotite effectively counteracts the inhibition by lime.By using B-45 as the collector and No.2 oil as the frother,a five-stage open-circuit flotation yields a desulfurized iron concentrate with a sulfur grade of 0.23%,an iron grade of 65.34%,and an iron recovery rate of 83.22%.

关 键 词：磁黄铁矿 活化剂 铁精矿含硫 

分 类 号：TD951[矿业工程—选矿]