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| Study on Preparation of Lead Oxide Powder from Waste Lead Paste by Desulfurization Conversion, Oxalic Acid Reduction and Calcination |
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Received:August 05, 2020
Revised:August 10, 2020
Accepted:August 14, 2020
Published Online:October 31, 2020
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| DOI：doi：10.3969/j.issn.1007-7545.2020.11.017 |
| KeyWord:waste lead paste; lead oxide fine powder; lead-acid battery; oxalic acid reduction; low temperature calcination |
| Author | Institution |
| HE Shan-ming |
江西理工大学 材料冶金化学学部 |
| CHEN Wen-jie |
江西理工大学 材料冶金化学学部 |
| YANG Ming |
江西理工大学 材料冶金化学学部 |
| WANG Shi-qi |
江西理工大学 材料冶金化学学部 |
| LIAO Chun-fa |
江西理工大学 材料冶金化学学部 |
| TONG Zhi-fang |
江西理工大学 材料冶金化学学部 |
| DENG Geng-feng |
江西理工大学 材料冶金化学学部 |
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| Abstract: |
| Simulated waste lead paste was treated by ammonium carbonate desulfurization conversion, oxalic acid reduction, and low temperature calcination. Effects of molar ratio of (NH4)2SO4/PbSO4, reaction time and reaction temperature on desulfurization reduction and conversion of lead paste were systematically investigated, and lead oxide powder was prepared by low temperature calcination. The results show that desulfurization rate of lead paste is as high as 97.6% under the optimal process conditions. All desulfurization products of lead paste can be converted into lead oxalate when mole ratio of (NH4)2SO4/PbSO4 is 2︰1 and reaction time is 3 h. Fine lead oxide powder with uniform shape and fine particle size can be prepared by calcining lead oxalate at 500 ℃ for 5 hours. |
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