Decomposition behaviour of PbSO4 during lead acid battery paste recycling process

Yun Li, Chaobo Tang, Pekka Taskinen, Shenghai Yang, Yongming Chen , Ari Jokilaakso

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


This work summarizes shortly the current lead-acid battery (LAB) recycling technologies, and proposes a cleaner and environmentally friendly LABs recycling process: a reductive sulphur-fixing recycling method. The dissociation behaviour of PbSO4, the main component in lead paste, during this new recycling process was investigated in detail. The phase transformation mechanisms during PbSO4 dissociation at Ar and air atmosphere were detected, respectively, with the help of thermogravimetric analysis (TG-DTA) and X-ray diffraction analysis techniques. Moreover, the gaseous dissociation products were separated, collected and analyzed. The investigation revealed that PbSO4 decomposition degree and partial pressures of gaseous products (SO3and SO2) in Ar were higher than in air atmosphere. Furthermore, partial pressure of SO2, (Pso2) was, generally, higher than (Pso3). In other words, increase of temperature promoted the dissociation of PbSO4.
Original languageEnglish
Title of host publicationProceedings of the 10th European Metallurgical Conference, EMC 2019
Place of PublicationClausthal-Zellerfeld
PublisherGDMB Verlag GmbH
Number of pages12
ISBN (Print)978-3-940276-89-6
Publication statusPublished - 2019
MoE publication typeA4 Article in a conference publication
EventEuropean Metallurgical Conference - Congress Center Düsseldorf Süd , Düsseldorf, Germany
Duration: 23 Jun 201926 Jun 2019
Conference number: 10


ConferenceEuropean Metallurgical Conference
Abbreviated titleEMC
Internet address


  • Lead paste recycling
  • Reductive sulphur-fixing recycling process
  • PbSO4 dissociation behaviour
  • Sulphur immobilization
  • Recycling

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