这是一篇冶金工程领域的论文.某铜冶炼渣浮选尾渣中铁品位为37.42％,铜品位为1.86％,根据其矿石性质特点,采用烟煤作为还原剂,应用直接还原焙烧-磁选工艺回收铜尾渣中铜铁,实验结果表明:将铜冶炼渣、烟煤和生石灰(作为助还原剂)按100∶25∶20的质量比混合,在焙烧温度定1 200 ℃,时间为80 min,磨矿细度为-0.045 mm 80％,磁场强度为0.139 T条件下可获得铁品位为90.98％,铁回收率为90.13％,铜品位为5.82％、铜回收率为87.38％的含铜铁精矿,实现了冶炼渣铜中铜铁的综合回收.
Experimental Research on Recovery Copper and Iron from Copper Smelting Slags by Direct Reduction Roasting-magnetic Separation
This is an article in the field of metallurgical engineering.Torecover copper and iron from a copper smelting slag flotation tailingwith iron grade of 37.42％and copper grade of 1.86％,according to the characteristics of its ore properties,the bituminous coal was used as a reductant,the process of direct reduction roasting-magnetic separation was applied.The experimental results show that copper smelting slag,bitumite and quicklime(as a co-reducing agent)are mixed in the mass ratio of 100∶25∶20,and at the conditions of roasting temperature of 1 200 ℃,time of 80 min,the roasted ores gringding fineness of-0.045 mm 80％,and magnetic strength of 0.139 T,the copper-bearing iron ore concentrate can be obtained with an iron grade of 90.98％,iron recovery of 90.13％,copper grade of 5.82％and copper recovery of 87.38％,thus realizing the comprehensive recovery of copper and iron from copper smelting slags.
Metallurgical engineeringCopper smelting slagsRestore the roasting processMagnetic separationComprehensive recovery
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