西北某高磷磁铁矿选矿试验研究  

Study on Beneficiation Test of a High Phosphorus Magnetite in Northwest China

作　　者：朱显帮[1] 黄新[1] 

机构地区：[1]中钢集团马鞍山矿山研究院有限公司

出　　处：《金属矿山》2012年第3期66-69,共4页Metal Mine

摘　　要：西北某高磷磁铁矿矿石铁品位为35.72%、磷含量为0.77%,铁矿物中磁铁矿占有率为86.62%,嵌布粒度微细。对该矿石进行了湿式预选抛废粒度研究、阶段磨矿—阶段弱磁选和弱磁精反浮选脱硅试验研究。结果表明:湿式预选抛废可以显著提高入磨矿石品位、减少入磨量,采用2段磨矿、2段弱磁选不能获得铁品位和磷含量合格的铁精矿,弱磁精经1粗1精3扫反浮选脱磷,最终可获得铁品位为64.78%,铁回收率为68.01%,磷含量为0.139%的铁精矿。An iron ore in northwest China contains TFe grade of 35.72% and P 0. 77%, and magnetite constitutes 86. 62% of the iron ores that disseminates in the form of micro-fine particles. The experiments were carried out by feeding particle of wet pre-eoncentration for discarding the tailings, stage grinding-low intensity magnetic separation and reverse flotation for degrading phosphorus in concentrations of low intensity magnetic separation. The results show that wet pre-concentration for discarding the tailings can increase the grade of feed and decrease the dosage for grinding remarkably. The eligible iron concentrates with reasonable grade of Fe and P can not obtained by the process of two-stage grinding-low intensity magnetic separation. Through the dephosphofization reverse flotation process of one-stage roughing, one-stage cleaning and three-stage scavenging for iron concentrate of the low intensity magnetic separation, the finally iron concentrate of Fe grading at 64.78% and P at O. 139% with Fe recovery of 68.01% was achieved.

关 键 词：高磷磁铁矿 细磨 弱磁选 反浮选 

分 类 号：TD952[矿业工程—选矿]