顶吹炉处理废旧印刷电路板的试验研究
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摘要
采用自主研发的顶吹炉处理含Cu 6.54%、Au 3.2g/t、Ag 32.7g/t的废旧印刷电路板,探索了渣型、温度、风量和燃料量对产品粗铜含铜量和铜回收率的影响。结果表明,控制渣中SiO_2/FeO≈1.35、SiO_2/CaO≈2、炉温1 250℃、每100kg电路板喷枪工艺风量450m~3(标态)和柴油100L的工艺条件下,产品粗铜含Cu 90.25%、Au 45.5g/t、Ag 445.6g/t,废旧印刷电路板中Cu、Au、Ag总回收率均大于95%,烟气达标排放。通过顶吹炉处理废旧印刷电路板,有价金属回收率高,工艺可行,具有产业化前景。
Waste printed circuit boards(WPCBs)bearing Cu 6.54%,Au 3.2 g/t and Ag 32.7 g/t were treated in self-developed top blowing furnace.Effects of slag type,temperature,air volume and fuel quantity on copper content and copper recovery rate in blister copper were explored.The results show that content of Cu,Au and Ag in blister copper is 90.25%,45.5 g/t and 445.6 g/t respectively,and total recovery rate of Cu,Au and Ag is 95%above under the conditions including SiO_2/FeO≈1.35,SiO_2/CaO≈2,temperature of 1 250℃,and process air volume of spray gun of 450 m~3(standard status)and diesel oil of 100 Lfor 100 kg WPCBs.Furthermore,flue gas can be discharged up to standard.Treatment of WPCBs by top blowing furnace has the advantages of high recovery rate of valuable metals,feasibility and good industrialization prospects.
Waste printed circuit boards(WPCBs)bearing Cu 6.54%,Au 3.2 g/t and Ag 32.7 g/t were treated in self-developed top blowing furnace.Effects of slag type,temperature,air volume and fuel quantity on copper content and copper recovery rate in blister copper were explored.The results show that content of Cu,Au and Ag in blister copper is 90.25%,45.5 g/t and 445.6 g/t respectively,and total recovery rate of Cu,Au and Ag is 95%above under the conditions including SiO_2/FeO≈1.35,SiO_2/CaO≈2,temperature of 1 250℃,and process air volume of spray gun of 450 m~3(standard status)and diesel oil of 100 Lfor 100 kg WPCBs.Furthermore,flue gas can be discharged up to standard.Treatment of WPCBs by top blowing furnace has the advantages of high recovery rate of valuable metals,feasibility and good industrialization prospects.
引文
[1]刘旸,刘静欣,郭学益.电子废弃物处理技术研究进展[J].金属材料与冶金工程,2014,42(2):44-49.
[2]XIU F R,QI Y Y,ZHANG F S.Recovery of metals from waste printed circuit boards by supercritical water pretreatment combined with acid leaching process[J].Waste Management,2013,33(5):1251-1257.
[3]张航,王佐仑,丁洁,等.不同废旧电路板的热解行为[J].广东化工,2014,41(19):37-38.
[4]刘小军,卢燕妮,崔花莉.废弃印刷线路板回收处理技术的研究进展[J].广州化工,2011,39(14):42-44.
[5]郭键柄,张琪,陈正,等.废旧印刷电路板回收利用的研究进展[J].有色金属(冶炼部分),2015(7):66-69.
[6]陈国发,李运刚.相图原理与冶金相图[M].北京:冶金工业出版社,2002:176-182.
[2]XIU F R,QI Y Y,ZHANG F S.Recovery of metals from waste printed circuit boards by supercritical water pretreatment combined with acid leaching process[J].Waste Management,2013,33(5):1251-1257.
[3]张航,王佐仑,丁洁,等.不同废旧电路板的热解行为[J].广东化工,2014,41(19):37-38.
[4]刘小军,卢燕妮,崔花莉.废弃印刷线路板回收处理技术的研究进展[J].广州化工,2011,39(14):42-44.
[5]郭键柄,张琪,陈正,等.废旧印刷电路板回收利用的研究进展[J].有色金属(冶炼部分),2015(7):66-69.
[6]陈国发,李运刚.相图原理与冶金相图[M].北京:冶金工业出版社,2002:176-182.