Thermodynamic analysis and process optimization of zinc and lead recovery from copper smelting slag with chlorination roasting

作     者：Bei-kai ZHANG Xue-yi GUO Qin-meng WANG Qing-hua TIAN 张倍恺;郭学益;王亲猛;田庆华

作者机构：School of Metallurgy and EnvironmentCentral South UniversityChangsha 410083China National&Regional Joint Engineering Research Center of Nonferrous Metal Resources RecyclingChangsha 410083China Hunan Key Laboratory of Nonferrous Metal Resources RecyclingChangsha 410083China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2021年第31卷第12期

页      面：3905-3917页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 080603[工学-有色金属冶金] 08[工学] 0806[工学-冶金工程] 

基　　金：The authors are grateful for the financial supports from the National Natural Science Foundation of China(Nos.51620105013,51904351) Innovation-Driven Project of Central South University,China(No.2020CX028) Natural Science Fund for Distinguished Young Scholar of Hunan Province,China(No.2019JJ20031) the National Key R&D Program of China(No.2019YFC1907400) 

主　　题：chlorination roasting copper smelting slags thermodynamic models optimization Zn and Pb recovery Box−Behnken design 

摘      要：An efficient chlorination roasting process for recovering zinc(Zn)and lead(Pb)from copper smelting slag was *** models were established,illustrating that Zn and Pb in copper smelting slag can be efficiently recycled during the chlorination roasting *** decreasing the partial pressure of the gaseous products,chlorination was *** Box−Behnken design was applied to assessing the interactive effects of the process variables and optimizing the chlorination roasting ***_(2) dosage and roasting temperature and time were used as variables,and metal recovery efficiencies were used as *** the roasting temperature was 1172℃ with a CaCl_(2) addition amount of 30 wt.%and a roasting time of 100 min,the predicted optimal recovery efficiencies of Zn and Pb were 87.85%and 99.26%,respectively,and the results were validated by experiments under the same *** residual Zn-and Pb-containing phases in the roasting slags were ZnFe_(2)O_(4),Zn_(2)SiO_(4),and PbS.