Recovery of Zinc and Lead from Electric Arc Furnace Dust by Using Selective Chlorination and Evaporation Reaction
Selective chlorination and evaporation reactions could become one of the applicable methods for the treatment of electric arc furnace dust containing considerable amount of zinc and lead.In this study,the selective chlorination and evaporation rate of the Fe2O3–ZnFe2O4–ZnO–PbO mixture or practical electric arc furnace dust with Ar–Cl2–O2 gas was measured at 1073 K by gravimetry and the effects of partial pressures of chlorine and oxygen on the Zn and Pb removal rates were investigated.Zinc oxide and lead oxide contained in the oxide mixture were selectively chlorinated and zinc and lead chlorides evaporated to gas phase,while iron oxide remained as oxide in a residue.By chlorinating with Ar–Cl2 gas,over 99%of zinc and lead was removed from oxide mixture as well as about 3%of iron was lost by the chlorination and evaporation reactions.Selective chlorination using Ar–Cl2–O2 gas was conducted to decrease the loss of iron and improve the efficiency of the selective chlorination and evaporation reactions.The selectivity of zinc and lead was improved by using O2 gas mixture.In the case of practical electric arc furnace dust,over 99%of zinc was removed while about 17%of iron was also lost by the chlorination and evaporation reactionswith Cl2–O2 gas.
electric arc furnace dust zinc lead selective chlorination and evaporation recycling
Kitao Hiroki Matsuura Hiroyuki Tsukihashi Fumitaka
Department of Advanced Materials Science,Graduate School of Frontier Sciences,The University of Tokyo,5-1-5 Kashiwanoha,Kashiwa,Chiba 277-8561,Japan
国内会议
上海
英文
1-4
2015-10-21（万方平台首次上网日期，不代表论文的发表时间）