Separation of halogens and recovery of heavy metals from secondary copper smelting dust  

再生铜烟灰中卤素的分离和重金属的回收

作　　者：Zhi-lou LIU Zhi-kang CHEN Fu-ze SUN Zhi-heng ZHANG Kang YAN Shui-ping ZHONG Hui LIU Rui-xiang WANG Jia-yuan LI Zhi-feng XU 刘志楼;陈志康;孙辅泽;张志恒;严康;衷水平;刘恢;王瑞祥;李家元;徐志峰(江西理工大学冶金工程学院,赣州341000;湘南学院化学与环境科学学院,郴州423000;赣州市绿色冶金与工艺强化工程技术研究中心,赣州341000;自然资源部离子稀土资源与环境重点实验室,赣州341000)

机构地区：[1]School of Metallurgy Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China [2]School of Chemistry and Environmental Science,Xiangnan University,Chenzhou 423000,China [3]Ganzhou Engineering Technology Research Centre of Green Metallurgy and Process Intensification,Ganzhou 341000,China [4]Key Laboratory of Ionic Rare Earth Resources and Environment,Ministry of Natural Resources,Ganzhou 341000,China

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第8期2686-2701,共16页中国有色金属学报（英文版）

基　　金：the National Key Research and Development Program of China(No.2019YFC1908400);the National Natural Science Foundation of China(Nos.52174334,52374413);the Jiangxi Provincial Cultivation Program for Academic and Technical Leaders of Major Subjects,China(Nos.20212BCJ23007,20212BCJL23052);the Jiangxi Provincial Natural Science Foundation,China(Nos.20224ACB214009,20224BAB214040);the Double Thousand Plan of Jiangxi Province,China(No.S2021GDQN2970);the Distinguished Professor Program of Jinggang Scholars in Institutions of Higher Learning of Jiangxi Province,China.

摘　　要：The separation of halogens and recovery of heavy metals from secondary copper smelting(SCS)dust using a sulfating roasting−water leaching process were investigated.The thermodynamic analysis results confirm the feasibility of the phase transformation to metal sulfates and to gaseous HF and HCl.Under the sulfating roasting conditions of the roasting temperature of 250℃ and the sulfuric acid excess coefficient of 1.8,over 74 wt.%of F and 98 wt.%of Cl were volatilized into flue gas.Approximately 98.6 wt.%of Zn and 96.5 wt.%of Cu in the roasting product were dissolved into the leaching solution after the water leaching process,while the leaching efficiencies of Pb and Sn were only 0.12%and 0.22%,respectively.The mechanism studies indicate the pivotal effect of roasting temperature on the sulphation reactions from various metal species to metal sulfates and the salting out reactions from various metal halides to gaseous hydrogen halides.采用硫酸化焙烧−水浸工艺对再生铜烟灰中卤素分离和重金属回收进行研究。热力学结果证实了物相向硫酸盐和气态HF和HCl转化的可行性。在硫酸化焙烧温度250℃和硫酸过量系数1.8的反应条件下,超过74%(质量分数)的F和98%(质量分数)的Cl挥发进入烟气。经过水浸后,焙烧产物中约98.6%(质量分数)的Zn和96.5%(质量分数)的Cu溶解到浸出液中,而Pb和Sn的浸出率分别仅为0.12%和0.22%。机制研究结果表明,焙烧温度对金属化合物向金属硫酸盐的硫酸化反应和金属卤化物向气态卤化氢的盐析反应起到重要作用。

关 键 词：secondary copper smelting dust sulfating roasting water leaching halogen volatilization heavy metal separation 

分 类 号：TF803[冶金工程—有色金属冶金]