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再生铜烟灰中卤素的分离和重金属的回收

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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HC1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C1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.
Separation of halogens and recovery of heavy metals from secondary copper smelting dust
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 HC1.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.

secondary copper smelting dustsulfating roastingwater leachinghalogen volatilizationheavy metal separation

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

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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

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再生铜烟灰 硫酸化焙烧 水浸 卤素挥发 重金属分离

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaJiangxi Provincial Cultivation Program for Academic and Technical Leaders of Major Subjects,ChinaJiangxi Provincial Cultivation Program for Academic and Technical Leaders of Major Subjects,ChinaJiangxi Provincial Natural Science Foundation,ChinaJiangxi Provincial Natural Science Foundation,ChinaDouble Thousand Plan of Jiangxi Province,ChinaDistinguished Professor Program of Jinggang Scholars in Institutions of Higher Learning of Jiangxi Province,China

2019YFC1908400521743345237441320212BCJ2300720212BCJL2305220224ACB21400920224BAB214040S2021GDQN2970

2024

10.1016/S1003-6326(24)66569-6

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(8)