经改性的电炉贫化铜渣的酸浸—弱磁选试验

某铜冶炼厂的电炉贫化渣铜、铁含量分别为1.24%和31.80%,主要可见铁橄榄石相和磁铁矿相。为了确定该电炉贫化渣的开发利用工艺,进行了工艺条件研究。结果表明,铜渣在磨矿细度为D90=52.6μm,硫酸的浓度为150 g/L,过氧化氢添加量为150 m L/kg,液固比为5 m L/g,浸出温度为60℃,浸出时间为60 min,弱磁选磁场强度为160 k A/m情况下,可获得铜浸出率为67.15%,铁精矿铁品位为56.01%、铁回收率为62.38%的试验指标,可较好地实现该资源中铜、铁的回收。

Experiments on Acid Leaching-Low Intensity Magnetic Separation of Modified Electric Furnace Copper Slag

The electric furnace copper slag from a copper smelting plant contain copper content of 1.24% and iron content 31.80%,and the main iron ore exists in fayalite and magnetite phase.In order to determine the recycling and utilizing process for electric furnace copper smelting slag,the process conditions were studied.The results showed that under conditions of grinding fineness of 52.6 μm accounting for 90%,sulfuric acid concentration of 150 g/L,hydrogen peroxide dosage of 150 mL/kg,L/S ratio of 5 mL/g，leaching temperature of 60 ℃ for 60 min,low magnetic field intensity of 160 kA/m，such indexes as copper leaching rate of 67.15%,iron concentrate with iron grade of 56.01% and iron recovery rate of 62.38% were realized from copper slag with copper and iron well recovered.