从含铜颜料污泥浸出液中回收铜的工艺研究
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摘要
颜料污泥中重金属含量高,本研究以含铜颜料污泥为原料,采用浸出、萃取分离方法回收铜,并确定从含铜颜料污泥中回收铜的工艺参数。实验结果表明,采用硫酸浸出含铜污泥,铜的浸出率为93.2%;采用N902-磺化煤油—硫酸萃取分离体系来萃取分离浸出液中的铜,最佳工艺条件为:萃取剂浓度为15%,相比(O/A)为1︰1,萃取时间为5 min的条件下,Cu2+萃取率为92.4%;用3 mol/L硫酸溶液对铜负载有机相进行一级反萃取5 min,Cu2+反萃率为94.7%。
The pigmented sludge has a high content of heavy metals. In this study, copper-containing pigment sludge was used as raw material.and the process parameters of copper recovery in copper-containing pigment sludge were determined.The experimental results show that the leaching rate of copper is 93.2 % when copper sludge is leached by sulfuric acid.In addition the N902-sulfonated kerosene-sulfuric acid extraction separation system was applied to extract the copper and iron in the extracting solution. The best process conditions were: extracting agent's volume fraction is 15 %, phase ratio(O/A) is 1︰1,extraction time is 5 min,the Cu~(2+) extraction rate is 92.4 %.The loaded organic phase was subjected to one-stage back extraction with 3 mol/L sulfuric acid solution for 5 min,the Cu~(2+) stripping rate was 94.7 %.
The pigmented sludge has a high content of heavy metals. In this study, copper-containing pigment sludge was used as raw material.and the process parameters of copper recovery in copper-containing pigment sludge were determined.The experimental results show that the leaching rate of copper is 93.2 % when copper sludge is leached by sulfuric acid.In addition the N902-sulfonated kerosene-sulfuric acid extraction separation system was applied to extract the copper and iron in the extracting solution. The best process conditions were: extracting agent's volume fraction is 15 %, phase ratio(O/A) is 1︰1,extraction time is 5 min,the Cu~(2+) extraction rate is 92.4 %.The loaded organic phase was subjected to one-stage back extraction with 3 mol/L sulfuric acid solution for 5 min,the Cu~(2+) stripping rate was 94.7 %.
引文
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[2]周志明,吾石华.从含铜电镀污泥中回收铜和铁的工艺研究[J].无机盐工业,2007,39(12):42-44.
[3]季登会,罗文波,唐瑞祥,等.N902萃取分离铜锌混合液中铜的试验研究[J].中国有色冶金,2016(1):71-73.
[4]黎彬,严丽君,朱俊红,等.印刷线路板生产中含铜污泥的浸出研究[J].上海有色金属,2009,30(2):63-65.
[5]康立武,邹燕飞,王青云.用N902萃取废印刷线路板浸出液中的铜[J].有色金属(冶炼部分),2015(10):30-33.
[6]向延鸿,尹周澜,冉盈,等.高位阻β-二酮和LIX84混合萃取剂从氨性溶液中萃取铜[J].中国有色金属学报,2011,21(5):1171-1177.
[7]申君辉,刘妍君,朱延号,等.羟肟萃取剂LIX984N酸解和铜萃取分相性能[J].中国有色金属学报,2017,27(4):818-824.
[8]张彩霞,舒庆,刘若琳,等.新型铜萃取剂对十二烷基苯基羧基甲酮肟的合成及其萃铜性能[J].有色金属科学与工程,2017,8(6):36-42.
[9]李洪桂.湿法冶金学[M].中南大学出版社,2002:350-351.
[10]Liu B,Zhang S,Tian J,et al.New technology for recyclingmaterials from oily cold rollingmill sludge[J].International Journal of Minerals,Metallurgy,and Materials,2013,20(12):1141-1147.