侧吹熔炼铜渣的直流电贫化研究

使用小型交直流矿热电炉对富氧侧吹熔炼工艺产出的水淬铜渣进行贫化研究。结果表明,采用下负直流电贫化60min后渣含铜从0.73%降至0.28%,铜回收率约65%,比交流电提高约10个百分点。在1 160～1 350℃时熔渣温度对铜回收率影响不明显。黄铁矿精矿添加量为渣重10%时,渣含铜可降至0.24%,铜回收率约70%。渣含铜随冰铜品位的增高稍有增大的趋势。

Study on Dilution of Copper Side Blowing Smelting Slag with Direct Current

The water quenching copper slag from oxygen enrichment side blowing smelting process was diluted in laboratory through alternating current(AC) and direct current(DC) ore-smelting electric furnace.The results show that copper content in slag is reduced from 0.73% to 0.28% after 60 minutes dilution with bottom-cathode DC.The copper recovery is about 65%,increasing 10 percentage compared with that with AC.A variety of slag temperature between 1 160~1 350 ℃ has no obvious effect on copper recovery.With the dosage of pyrite concentrate of 10% of slag quantity,the copper content in slag will decrease to 0.24%,and the copper recovery is about 70%.The copper content in slag increases slowly with the increase of matte grade.