四川某铁精矿回收超纯铁精矿的选矿实验研究

Experimental Study on Recovery of Super Pure Iron Concentrate from an Iron Concentrate in Sichuan

摘要: 四川某铁精矿中TFe品位为64.56%，杂质成分SiO₂、Al₂O₃含量分别为5.50%和2.01%。物质组分研究表明，铁矿物主要以磁性铁形式存在，采用“阶段磨矿（再磨过程添加分散剂H01）-阶段磁选”工艺对该铁精矿进行提质降杂实验，实验可获得TFe品位为72.11%的超纯铁精矿产品，精矿中杂质成分SiO₂含量为0.20%，Al₂O₃的含量为0.16%，酸不溶物的含量为0.28%，TFe的回收率为92.72%。

Abstract: The iron grade of a iron concentrate in Sichuan is 64.56%, and the content of SiO₂ and Al₂O₃ is 5.50% and 2.01% respectively. Material composition research shows that iron minerals are mainly in the form of magnetic iron. The process of stage grinding and magnetic separation which added dispersant H01 in regrinding is carried out to increase iron grade and reduce silicon content. Finally, the super iron concentrate with iron grade 72.11%, SiO₂ content 0.20%, Al₂O₃ content 0.16%, acid insoluble content 0.28%, and the iron recovery is 92.72%.