摘要
铜冶炼烟灰浸出渣中铅主要以硫酸铅存在,向其浆化后的料浆中加入碳酸钠,其中硫酸铅转化成溶解度更低的碳酸铅,转化后的铜冶炼烟灰浸出渣进行还原熔炼,产生铅铋合金、冰铜、熔炼渣。本试验铜冶炼烟灰浸出渣碳酸盐转化的初步优化工艺条件为:反应温度60℃、反应时间4h、液固比4:1、反应终点pH=9,相应脱硫率可达90%以上。铜冶炼烟灰浸出渣转化前、后还原熔炼对比,后者较前者铅、铋元素的直收率分别提高了16.74%、3.85%。
Lead is most commonly present in the leaching slag from copper smelting dust as lead sulfate. Sodium carbonate is added into slurry of leaching slag, in which lead sulfate is converted into lead carbonate with lower solubility, and then reduction smelting for leaching slag converted into carbonate is carried out to produce lead bismuth alloy, matte and smelting slag. In this experiment, preliminary optimum process conditions of leaching slag from copper smelting dust converted into carbonate is summarized as below. Reaction temperature is 60℃, reaction time 4h, liquid-solid ratio 4:1, Ph=9 in reaction endpoint and the corresponding Sremoval rate can reach to above 90%. Comparison of reduction smelting before and after leaching slag converted into carbonate, direct recovery of Lead and bismuth of the latter is increased by 16.74% and 3.85% respectively than that of the former.
出处
《世界有色金属》
2017年第21期1-3,共3页
World Nonferrous Metals
关键词
铜冶炼烟灰
浸出渣
硫酸铅
转化
碳酸铅
还原熔炼
Copper smelting dust
Leaching slag
Lead sulfate
Conversion
lead Carbonate
Reduction smelting
