Recycling of lead from spent lead-acid battery by vacuum reduction-separation of Pb-Sb alloy coupling technology

被引:25
作者
Liu, Tiantian [1 ]
Bao, Zhiqun [2 ]
Qiu, Keqiang [1 ]
机构
[1] Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China
[2] Kunming Met Res Inst, Kunming 650031, Yunnan, Peoples R China
关键词
Spent lead storage batteries; Desulfurized lead paste; Pb-Sb alloy; Vacuum reduction reaction; Direct recovery ratio of lead; RECOVERING LEAD; PASTE; ANTIMONY; CARBONATE; SULFATE; CONVERSION; CITRATE;
D O I
10.1016/j.wasman.2019.12.007
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Until today, there are still many problems that must be solved through innovative research to make the recycling of spent lead-acid batteries and the separation of Pb-Sb alloy more environmentally friendly and energy-saving. In this paper, a novel method for regenerating lead paste, by vacuum reduction reaction coupling with separation of Pb-Sb alloy, was developed. In this process, antimony from Pb-Sb alloy is used to reduce desulfurized lead paste into lead under vacuum, while it is oxidized into volatile Sb2O3 as by-product. The results showed that direct recovery ratio of Pb from desulfurized lead paste reached 99.29% and Sb-content in Pb-Sb alloy decreased from 46% to 0.98% under following conditions: the mass ratio of desulfurized lead paste to Pb-Sb alloy of 1.50, residual gas pressure of 30 Pa, reduction temperature of 810 degrees C for 50 min. By this method, not only the lead paste can be recovered with high atom economy, but also the Pb-Sb alloy can be separated efficiently at zero cost and without "three wastes" generation. Therefore, this method is very useful for the recycling of spent lead-acid battery and the separation of Pb-Sb alloy. (C) 2019 Published by Elsevier Ltd.
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页码:45 / 51
页数:7
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