Novel recycling process for lead-acid battery paste without SO2 generation - Reaction mechanism and industrial pilot campaign

Release time:2021-03-04

Impact Factor:7.246

DOI number:10.1016/j.jclepro.2019.01.197

Journal:Journal of Cleaner Production

Key Words:Reductive sulfur-fixing smelting Efficient lead extraction Reaction mechanism SO2emission Industrial application evaluation

Abstract:This study proposes an innovative and environment-friendly method for recycling spent lead-acid batteries without SO2generation. Iron-containing waste was employed as a sulfur-fixing agent to retain sulfur as ferrous matte, which eliminated the generation and emissions of gaseous SO2. This work investigated the thermodynamic and experimental feasibility and conversion mechanism of the method, and evaluated its industrial applicability. A bench-scale test showed direct recoveries of 93.5% and 97.7% in crude lead and ferrous matte for lead and sulfur, respectively. The phase transformation mechanism study indicated that metallic lead from the lead paste was extracted mainly through the sequence of PbSO4
!C=COPbS









! Fe3O4PbO
!C=CO Pb. Sulfur in PbSO4was thusfirst transferred to PbS andfinallyfixed as FeS. An industrial-scale pilot campaign was also conducted to confirm the feasibility and reliability of the new process.

Indexed by:Journal paper

Discipline:Engineering

First-Level Discipline:Metallurgical Engineering

Document Type:J

Volume:217

Page Number:1620-171

ISSN No.:0959-6526

Translation or Not:no

Date of Publication:2019-04-20

Included Journals:SCI