Concept of EAF dust treatment using waste plastics containing brominated flame retardants

Mariusz Grzegorz Grabda, Sylwia Oleszek-Kudlak, Etsuro Shibata, Takashi Nakamura

Research output: Contribution to conferencePaper

Abstract

Tetrabromobisphenol A (TBBPA) is the largest volume brominated flame retardant (BFR) in production today, used in more than 70 % of the world's electronic and electric (E&E) appliances as well as in many plastics, textiles and so forth. There is constant growth in the production of such products and they become obsolete quickly, this generates huge amounts of BFR-containing wastes and causes significant problems for their safe disposal and recycling. Due to the presence of significant amounts of leachable heavy metals, EAF dusts (EAFD) are classified as hazardous wastes. On the other hand the EAF dust contains up to 35 % of Zn, and is considered to be a valuable secondary raw material in the production of zinc. Numerous zinc recovery processes have been developed, many of them, however, were not commercialized because of metallurgical and economical inefficiencies. Few pyrometallurgical processes like Waelz rotary kiln process have achieved commercial success. Its main disadvantage, however, is high energy consumption (Waelz process requires temperatures of 1200-1300 °C). We proposed another alternative method for pyrometallurgical recycling of EAF dust using plastic waste containing BFRs such as TBBPA. It easily decomposes during thermal processing generating large amounts of gaseous HBr that can acts as a brominating agent for the bromination-evaporation of zinc and lead present in the dust. A new concept of EAF dust treatment process is proposed using waste plastics containing BFRs and merits and demerits are discussed with a review of EAF dust treatments in the present paper.

Original languageEnglish
Pages293-302
Number of pages10
Publication statusPublished - 2013 Oct 8
Externally publishedYes
Event7th European Metallurgical Conference, EMC 2013 - Weimar
Duration: 2013 Jun 232013 Jun 26

Other

Other7th European Metallurgical Conference, EMC 2013
CityWeimar
Period13/6/2313/6/26

Keywords

  • Brominate flame retardants
  • Eaf dust m Zinc recycling
  • Pyrometallurgical process

ASJC Scopus subject areas

  • Metals and Alloys

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  • Cite this

    Grabda, M. G., Oleszek-Kudlak, S., Shibata, E., & Nakamura, T. (2013). Concept of EAF dust treatment using waste plastics containing brominated flame retardants. 293-302. Paper presented at 7th European Metallurgical Conference, EMC 2013, Weimar, .