反射炉炼铜渣回收铜技术探索  

An Investigation on Cu Recovery from Copper Reverberatory Slag

作　　者：秦庆伟[1] 张丽琴[1] 黄自力[1] 李密[1] 李光强[1] 廖广东 

机构地区：[1]武汉科技大学钢铁冶金及资源利用教育部重点实验室,湖北武汉430081 [2]黄石大江集团有限公司,湖北黄石435005

出　　处：《过程工程学报》2009年第S1期13-18,共6页The Chinese Journal of Process Engineering

基　　金：湖北省教育厅科研计划项目(编号:B20081101);武汉科技大学钢铁冶金及资源利用教育部重点实验室开放基金资助项目(编号:FMRU2007K05);武汉科技大学基金项目(编号:2005XY3)

摘　　要：在铜熔炼反射炉渣中铜铁赋存状态分析基础上,采用常规选矿和火法贫化工艺对反射炉水淬渣进行回收铜技术探索.研究结果表明,水淬渣含1.06%铜和36.41%铁,铜、铁、硅矿物紧密共生,相互交织,铜矿物的结晶粒度多数低于5μm,在Na2S用量800g/t、混合捕收剂用量240g/t、浮选时间6min、磨矿细度95%为-0.074mm、矿浆浓度30%的浮选条件下,渣精矿品位4.54%,回收率达64.65%,常规选矿工艺难奏效.吹炼转炉渣返回贫化作业会导致反射炉渣含铜较高,添加一定量黄铁矿精矿,采用热渣排放方式能有效降低渣含铜.Based on the analysis of copper and iron occurrence states in copper reverberatory smelting slag,copper extraction from the slag was investigated with a process of flotation and pyrometallurgical cleaning technology. Slag from reverberatory furnace contains 1.06% Cu and 36.41% Fe. The slag consists of an intergrowth of copper,iron,and silicon minerals. The particle size of most copper containing minerals below 5 μm is incompatible with a flotation process. The optimum conditions for flotation of the water-quenched slag are as follows: natural pH,Na2S 800 g/t,mixed collecting agent 240 g/t,flotation time 6 min,percent of 74 μm particles 95% and solid content 30%. For the water-quenched slag at optimized conditions,64.65% of copper was recovered in one stage flotation and a 4.54% copper concentrate was achieved. Flotation technology is not suitable for copper recovery from water quenched reverberatory furnace slag. When molten converter slag is recycled for cleaning,excessive magnetite will lead to increase the amount of copper lost in reverberatory slag. At high temperature,pyrite concentrate may be added to decrease copper loss in slag.

关 键 词：反射炉 水淬渣 浮选 贫化 

分 类 号：X756[环境科学与工程—环境工程]