80 kVA交流电炉熔分铜渣选尾料金属化球团 提取铁合金

Extracting Ferroalloy from Metallized Pellets of Copper Slag Beneficiation Tailings Using 80 kVA AC Electric Furnace

铜渣选尾料是铜冶炼炉渣经过选矿工艺处理后产出的尾料,其中赋存丰富的Fe、Ni、Cu、Cr等有价金属。以回转窑还原焙烧后得到的铜渣选尾料金属化球团为研究对象,采用80 kVA交流电炉进行熔分实验,研究了额定工况下还原剂、助熔剂、沉降时间等不同工艺条件对Fe、Ni、Cu等金属回收率的影响,以及金属化球团熔分过程主要元素的迁移规律。结果表明,经回转窑还原得到的铜渣选尾料金属化球团在1530℃、熔剂率18%、沉降时间30 min工艺条件下进行电炉熔分可有效回收铁、铜等有价金属,获得高品位铁合金产品,Fe回收率达95%以上,镍、铜回收率分别达到38%和71%。元素走向分析表明,S、Pb、As等杂质元素会不同程度进入合金。

Copper slag beneficiation tailings are the tailings produced after copper smelting slag is treated by beneficiation process,which is rich in Fe,Ni,Cu,Cr and other valuable metals.In this paper,the metallization pellet of copper slag beneficiation tailings obtained after reduction and roasting in rotary kiln is taken as the research object,and 80 kVA AC furnace is used to carry out the melting experiment,and the effects of different process conditions such as reductant,co-solvent and settling time on the recovery rate of Fe,Ni,Cu and other metals under the rated conditions are investigated,as well as the migration law of the main elements in the melting process of the metallization pellet.The results shown that the metallization pellet of the copper slag beneficiation tailings obtained by rotary kiln reduction can effectively recover the valuable metals such as Fe and Cu,and obtain high-grade ferroalloy products by melting in an electric furnace under the process conditions of 1530℃,18% of melting agent rate,and 30 min of settling time,and the recovery of Fe is more than 95%,and the recovery of Ni and Cu reaches 38% and 71%respectively.Elemental direction analysis shown that S,Pb,As and other impurity elements will enter the alloy to varying degrees.