Development of a methodic process to recycle spent alkaline batteries

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2019-09-04

Autores

Manuel Fonseca Almeida (Autor) FEUP; Joana Dias (Autor) FEUP; Cristiana Ribeiro (Autor) FEUP; Cátia Correia (Autor) Outra

Indexação

ISI Web of Science

Scopus

Outras Informações

DOI: 10.1201/9780429289798

Abstract (EN): 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). © 2020 Taylor & Francis Group, London, UK.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Notas: C. Ribeiro, C. Correia, M. F. Almeida, J. M. Dias (2019), Development of a methodic process to recycle spent alkaline batteries, Wastes: Solutions, Treatments and Opportunities III, (pp. 353-359). Vilarinho, Castro, Gonçalves & Lopes (eds.). London: Taylor & Francis Group, ISBN: 978-0-367-25777-4

Nº de páginas: 7