Kinetic of carbothermal reduction of zinc, tin and lead from electroplating sludge

XU Jiacong; YU Xiaoqiang; GONG Ao; WU Xuangao; CAO Caifang; LIU Mudan; CHEN Zhiqiang; TIAN Lei; XU Zhifeng; LIU Yong

doi:10.13264/j.cnki.ysjskx.2020.05.008

Volume 11 Issue 5

Oct. 2020

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Nonferrous Metals Science and Engineering > 2020 > 11(5): 52-58. > DOI: 10.13264/j.cnki.ysjskx.2020.05.008

XU Jiacong, YU Xiaoqiang, GONG Ao, WU Xuangao, CAO Caifang, LIU Mudan, CHEN Zhiqiang, TIAN Lei, XU Zhifeng, LIU Yong. Kinetic of carbothermal reduction of zinc, tin and lead from electroplating sludge[J]. Nonferrous Metals Science and Engineering, 2020, 11(5): 52-58. DOI: 10.13264/j.cnki.ysjskx.2020.05.008

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Kinetic of carbothermal reduction of zinc, tin and lead from electroplating sludge

XU Jiacong¹,
YU Xiaoqiang¹,
GONG Ao¹,
WU Xuangao¹,
CAO Caifang¹,
LIU Mudan^{2, 3},
CHEN Zhiqiang^{2, 3},
TIAN Lei^{1, 4, ,},
XU Zhifeng¹,
LIU Yong^{2, 3}

1.
Institute of Green Metallurgy and Process Intensification, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
2.
Guangdong Institute of Resources Comprehensive Utilization, Guangzhou 510000, China
3.
State Key Laboratory of Rare Metals Separation and Comprehensive Utilization, Guangzhou 510000, China
4.
Henan Yuguang Gold and Lead Group Co., Ltd., Jiyuan 454650, Henan, China

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Received Date: April 26, 2020
Published Date: October 30, 2020

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Abstract

Copper-containing sludge, the industrial waste after treatment of industrial waste water from metallurgical and chemical industries, has been added to the list of the national hazardous wastes. It includes such valuable metals as copper, zinc, nickel, tin, lead. In order to recover these metals, this paper studies the volatilization law and kinetics of carbothermal reduction of zinc, tin and lead by electroplating sludge. According to the experiment, when the carbothermal reduction temperature was raised to 1 523 K, the volatilization rate of Zn, Sn and Pb could reach 96.98%, 96.24% and 95.37% respectively under the condition of carbothermal reduction for 60 mins, and high temperature was favorable for volatilizing Zn, Sn and Pb. The results showed that the reaction system of carbothermal reduction of electroplating sludge could be described by Mckwan reaction equation effectively. The activation energies of Zn, Sn and Pb reduction volatilization were 149.50, 138.01 and 132.26 kJ/mol, respectively. The carbothermal reduction process of electroplating sludge was controlled by interface chemical reaction.
- electroplating sludge,
- carbothermal reduction,
- kinetic,
- activation energy,
- interface chemical reaction control

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