Development of a methodic process to recycle spent alkaline batteries

• Type: Article in International Conference Proceedings Book
• Date: 2020

Authors

Ribeiro, C (Author) Other; Correia, C (Author) Other; Manuel Fonseca Almeida (Author) FEUP; Joana Dias (Author) FEUP

Conference proceedings International

Title: Wastes: Solutions, Treatments and Opportunities III - Selected papers from the 5th International Conference Wastes: Solutions, Treatments and Opportunities, 2019

Pages: 353-359

5th International Conference Wastes: Solutions, Treatments and Opportunities, 2019

4 September 2019 through 6 September 2019

Indexing

Scopus - 0 Citations

Other information

Authenticus ID: P-00R-RXW

DOI: 10.1201/9780429289798-56

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.

Language: English

Type (Professor's evaluation): Scientific