A New Pyrometallurgical Recycling Technique for Lead Battery Paste without SO2 Generation: A Thermodynamic and Experimental Investigation

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Research units

  • Central South University


An innovative lead recycling process from scrap lead-acid battery paste is presented. The novelty in the process is avoiding SO2 generation and emission by using reductive sulfur-fixing technique. Iron-bearing secondary wastes produced from metallurgical industry were utilized as sulfur-fixing agent to capture sulfur in the form of FeS (s) instead of generation of SO2 (g). Molten Na2CO3 salt was added to the smelting system to speed the reactions and improve valuable metals’ recovery and sulfur-fixation efficiency. Furthermore, this process can simultaneously co-treat various lead and iron-bearing wastes. At the same time, some precious metals, such as Au and Ag, contained in iron-bearing wastes can be recovered. The feasibility and reliability of this process was investigated thermodynamically and experimentally with the help of HSC 9.0 database and XRD and SEM-EDS analysis. A possible reaction mechanism and path in PbSO4-Fe2O3-Na2CO3-C smelting system was also clarified.


Original languageEnglish
Title of host publicationExtraction 2018
Subtitle of host publicationProceedings of the First Global Conference on Extractive Metallurgy
Publication statusPublished - 2018
MoE publication typeA4 Article in a conference publication
EventGlobal Conference on Extractive Metallurgy - Ottawa, Canada
Duration: 26 Aug 201829 Aug 2018
Conference number: 1

Publication series

NameThe Minerals, Metals & Materials Series


ConferenceGlobal Conference on Extractive Metallurgy
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ID: 40682906