Extracting Ferroalloy from Metallized Pellets of Copper Slag Beneficiation Tailings Using 80 kVA AC Electric Furnace
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 1 530 ℃,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.
tailings from slagmetallized pelletsmelting separationferroalloy
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