輝光放電等離子體輔助堿浸銅冶煉煙灰中銅砷分離
發(fā)布時間：2019-05-24 18:07
【摘要】：采用輝光放電等離子體輔助Na_2S-NaOH浸取體系對銅冶煉煙灰(簡稱"煙灰")進行研究,在放電時間10min、放電功率500 W、放電壓強150 Pa、極板間距0.9 cm的條件下,砷的浸出率為92.52%,銅的浸出率為7.76%,實現(xiàn)了砷和銅的有效分離。采用該方法處理后煙灰中的砷從7.11%降到0.45%,銅從2.62%變?yōu)?.42%,為煙灰的進一步利用創(chuàng)造了條件。XPS、XRD和重金屬形態(tài)分析的綜合分析結(jié)果表明,輝光能將As(Ⅲ)氧化為As(Ⅴ)、Cu(Ⅰ)氧化為Cu(Ⅱ),且在堿性條件下As(Ⅴ)比As(Ⅲ)更易浸出。因此,輝光放電預氧化有利于砷和銅在堿浸體系中選擇性分離。
[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，
本文編號：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，
本文編號：2485071
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