辉光放电等离子体辅助碱浸铜冶炼烟灰中铜砷分离
发布时间：2019-05-24 18:07
【摘要】：采用辉光放电等离子体辅助Na_2S-NaOH浸取体系对铜冶炼烟灰(简称"烟灰")进行研究,在放电时间10min、放电功率500 W、放电压强150 Pa、极板间距0.9 cm的条件下,砷的浸出率为92.52%,铜的浸出率为7.76%,实现了砷和铜的有效分离。采用该方法处理后烟灰中的砷从7.11%降到0.45%,铜从2.62%变为2.42%,为烟灰的进一步利用创造了条件。XPS、XRD和重金属形态分析的综合分析结果表明,辉光能将As(Ⅲ)氧化为As(Ⅴ)、Cu(Ⅰ)氧化为Cu(Ⅱ),且在碱性条件下As(Ⅴ)比As(Ⅲ)更易浸出。因此,辉光放电预氧化有利于砷和铜在碱浸体系中选择性分离。
[Abstract]:The copper smelting soot ("soot") was studied by glow discharge plasma assisted Na_2S-NaOH leaching system. Under the conditions of discharge time 10 min, discharge power 500 W, discharge pressure 150 Pa, plate spacing 0.9 cm, The leaching rate of arsenic is 92.52% and that of copper is 7.76%. The effective separation of arsenic and copper is realized. The arsenic and copper in soot decreased from 7.11% to 0.45% and 2.62% to 2.42%, respectively, which created conditions for the further utilization of soot. The comprehensive analysis results of XRD and heavy metal speciation analysis showed that the content of arsenic and copper in soot decreased from 7.11% to 0.45% and 2.42% respectively. As (III) was oxidized to As (V), Cu (鈪，
本文编号：2485071
[Abstract]:The copper smelting soot ("soot") was studied by glow discharge plasma assisted Na_2S-NaOH leaching system. Under the conditions of discharge time 10 min, discharge power 500 W, discharge pressure 150 Pa, plate spacing 0.9 cm, The leaching rate of arsenic is 92.52% and that of copper is 7.76%. The effective separation of arsenic and copper is realized. The arsenic and copper in soot decreased from 7.11% to 0.45% and 2.62% to 2.42%, respectively, which created conditions for the further utilization of soot. The comprehensive analysis results of XRD and heavy metal speciation analysis showed that the content of arsenic and copper in soot decreased from 7.11% to 0.45% and 2.42% respectively. As (III) was oxidized to As (V), Cu (鈪，
本文编号：2485071
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