Please use this identifier to cite or link to this item:
https://hdl.handle.net/10216/125177
Author(s): | Manuel Fonseca Almeida Joana Dias Cristiana Ribeiro Cátia Correia |
Title: | Development of a methodic process to recycle spent alkaline batteries |
Issue Date: | 2019-09-04 |
Abstract: | Selective dismantling of spent alkaline batteries was conducted, followed by neutral leaching of the black mass at room temperature and gravity concentration to recover KOH and metallic Zn, respectively. A counter current washing process at two different S/L ratios of 1:3 and 1:5 was evaluated and a Wilfley shaking table was employed aiming metallic Zn recovery. Neutral leaching could be effectively conducted at a 1:5 S/L ratio (17 rpm, 20 min, room temperature), using four cycles with fresh water, leading to less than 1% of the black mass K in the final water. Although less effective in terms of K recovery, the use of 1:5 S/L ratio or lower seems more technically feasible for future application of the methodic washing (34 g KOH/L in the washing water). Gravity concentration requires further optimization to effectively concentrate metallic Zn and Mn appears to be present in the fractions of higher caliber (>850 µm). (c) 2020 Taylor & Francis Group, London, UK. |
URI: | https://hdl.handle.net/10216/125177 |
Document Type: | Artigo em Livro de Atas de Conferência Internacional |
Rights: | restrictedAccess |
Appears in Collections: | FEUP - Artigo em Livro de Atas de Conferência Internacional |
Files in This Item:
File | Description | Size | Format | |
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358278.pdf Restricted Access | 4.16 MB | Adobe PDF | Request a copy from the Author(s) |
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