再生铜烟灰中卤素的分离和重金属的回收

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

刘志楼 ¹陈志康 ¹孙辅泽 ¹张志恒 ¹严康 ¹衷水平 ¹刘恢 ¹王瑞祥 ¹李家元 ²徐志峰³

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作者信息

1. 江西理工大学冶金工程学院,赣州 341000
2. 湘南学院化学与环境科学学院,郴州 423000
3. 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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摘要

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.

Abstract

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.

关键词

再生铜烟灰/硫酸化焙烧/水浸/卤素挥发/重金属分离

Key words

secondary copper smelting dust/sulfating roasting/water leaching/halogen volatilization/heavy metal separation

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基金项目

National Key Research and Development Program of China(2019YFC1908400)

National Natural Science Foundation of China(52174334)

National Natural Science Foundation of China(52374413)

Jiangxi Provincial Cultivation Program for Academic and Technical Leaders of Major Subjects,China(20212BCJ23007)

Jiangxi Provincial Cultivation Program for Academic and Technical Leaders of Major Subjects,China(20212BCJL23052)

Jiangxi Provincial Natural Science Foundation,China(20224ACB214009)

Jiangxi Provincial Natural Science Foundation,China(20224BAB214040)

Double Thousand Plan of Jiangxi Province,China(S2021GDQN2970)

Distinguished Professor Program of Jinggang Scholars in Institutions of Higher Learning of Jiangxi Province,China()

出版年

2024

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)

CSTPCDCSCD

影响因子：1.183

ISSN：1003-6326

参考文献量45

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