碩士 / 國立成功大學 / 化學工程學系 / 104 / There are a lot of lead in waste lead-acid batteries. So, batteries should be recycled properly for recovery of lead. At present, All of waste lead-acid batteries plants in Taiwan use pyrometallurgical technique. But this technique will produce high lead content of byproducts and cause SO2 pollution. Consequently, this study tries to use hydrometallurgical technique to recover lead. This study uses HCl-NaCl system to dissolve lead paste and recover lead by electrolysis. Effectiveness of Pb extraction ratio by leaching lead paste was then evaluated by varying [Cl-], [HCl], S/L and temperature. Experimental results revealed that Pb extraction ratio was higher than 99 % at leaching time of 180 min, S/L of 0.02 kg/L, [Cl-] of 6.14 M, [HCl] of 1.0 M and temperature of 50 ℃ with dissolving 99.9 wt% of lead paste. After leaching, the solution cooled to room temperature, and electrolyzed with DSA anode and stainless steel tube cathode. Experimental results revealed that lead recovery was 96.5 % at electrolysis time of 180 min, [Cl-] of 3.32 M, [HCl] of 1.0 M and current intensity of 6.0 A. Lead was recovered on the cathode as metallic lead.
| Identifer | oai:union.ndltd.org:TW/104NCKU5063095 |
| Date | January 2016 |
| Creators | Chia-ChiHsu, 許家棋 |
| Contributors | Yao-Hui Huang, 黃耀輝 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 72 |
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