摘要
The metabolism of copper and arsenic in a copper pyrometallurgy process was studied through substance flow analysis method.The mass balance accounts and substance flow charts of copper and arsenic were established,indicators including direct recovery,waste recycle ratio,and resource efficiency were used to evaluate the metabolism efficiency of the system.The results showed that,the resource efficiency of copper was 97.58%,the direct recovery of copper in smelting,converting,and refining processes was 91.96%,97.13%and 99.47%,respectively.Meanwhile,for producing 1 t of copper,10 kg of arsenic was carried into the system,with the generation of 1.07 kg of arsenic in flotation tailing,8.50 kg of arsenic in arsenic waste residue,and 0.05 kg of arsenic in waste water.The distribution and transformation behaviors of arsenic in the smelting,converting,and refining processes were also analyzed,and some recommendations for improving copper resource efficiency and pollution control were proposed based on substance flow analysis.
采用物质流分析方法对铜火法冶炼过程铜和砷的代谢进行分析,建立铜和砷的物质平衡表及物质流图。采用直接回收率、废物循环率和资源效率等指标评价流程代谢效率。结果表明,该流程铜资源效率为97.58%,在熔炼、吹炼和精炼单元过程铜的直接回收率分别为91.96%、97.13%和99.47%。同时,生产1 t金属铜有10 kg砷进入系统。其中,1.07 kg砷进入浮选尾矿,8.50 kg砷进入除砷废渣,0.05 kg砷进入生产废水。此外,分析生产过程中砷在熔炼、吹炼和精炼单元中的分配和转化行为,并在物质流分析基础上,提出提高铜资源效率及控制污染的建议。
基金
financial supports from the National Key R&D Program of China(No.2019YFC1907400)
the National Natural Science Foundation of China(Nos.51904351,51620105013)。
