某冶炼铜渣综合回收铜铁的实验研究

Experimental Research on Recovery Copper and Iron from Copper Smelting Slags by Direct Reduction Roasting-magnetic Separation

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。

This is an article in the field of metallurgical engineering.Torecover copper and iron from acopper smelting slag flotation tailingwith iron grade of 37.42%and copper grade of 1.86%,according to thecharacteristics of its ore properties,the bituminous coal was used as a reductant,the process of directreduction roasting-magnetic separation was applied.The experimental results show that copper smeltingslag,bitumite and quicklime(as a co-reducing agent)are mixed in the mass ratio of 100∶25∶20,and at theconditions of roasting temperature of 1200℃,time of 80 min,the roasted ores gringding fineness of-0.045mm 80%,and magnetic strength of 0.139 T,the copper-bearing iron ore concentrate can be obtained with aniron grade of 90.98%,iron recovery of 90.13%,copper grade of 5.82%and copper recovery of 87.38%,thusrealizing the comprehensive recovery of copper and iron from copper smelting slags.