铜渣-生物质复合球团微波还原回收铁试验研究  

Experimental Study on Microwave Reduction Recovery of Iron from Copper Slag-Biomass Composite Pellets

作　　者：李帅 康泽双 LI Shuai;KANG Ze-shuang(Zhengzhou Non-ferrous Metal ResearchInstitute Co.,Ltd.,CHALCO,Zhengzhou 450041,China;China National Engineering Research Centerfor Aluminum Metallurgy,Zhengzhou 450041,China)

机构地区：[1]中铝郑州有色金属研究院有限公司,郑州450041 [2]国家铝冶炼工程技术研究中心,郑州450041

出　　处：《有色金属（冶炼部分）》2021年第10期20-25,共6页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家重点研发计划项目(2020YFC1908800);中铝郑州研究院自主研发项目(ZYY-2020-KJ-05)。

摘　　要：铜渣中铁含量在30%~45%,高于工业可采铁矿石品位,但铜渣中的铁主要以橄榄石形式赋存,提取回收难度大。以铜渣为原料,生物质碳为还原剂,采用微波还原—磁选工艺回收铜渣中铁资源。研究表明:铜渣生物质复合球团的最佳还原工艺为:还原温度1 473K、还原时间90min、CaO添加量为铜渣质量的15%,磁选后铁精矿中铁的品位可达85.9%,铁回收率为89.1%。Iron content in copper slag is 30%—45%,which is higher than grade of industrial recoverable iron ore.However,iron in copper slag mainly exists in fayalite,making it difficult to extract and recycle.Iron resources in copper slag were recovered by microwave reduction and magnetic separation process with copper slag as raw material and biomass carbon as reducing agent.The results show that iron grade in iron concentrate after magnetic separation is 85.9% with iron recovery of 89.1% under the optimal reduction condition of copper slag-biomass composite pellets including reduction temperature of1 473 K,reduction time of 90 min,and CaO addition of 15% of mass of copper slag.

关 键 词：铜渣 微波还原 金属铁 球团 

分 类 号：TF803.12[冶金工程—有色金属冶金]