Removal of chloride from electric arc furnace dust

Wei Sheng Chen, Yun Hwei Shen, Min Shing Tsai, Fang Chih Chang

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Electric arc furnace (EAF) dust with high chloride content increases the threat of dioxin emissions and the high chloride content reduces the value of recycled zinc oxide produced by EAF dust recycling plants. This study conducts a number of laboratory experiments to determine the technical feasibility of a new dechlorination method. These methods consist of a series of roasting processes and water washing processes. In the roasting process, EAF dust was heated in a tube furnace to evaluate the parameters of atmospheric conditions, roasting temperature, and roasting time. Results indicate that sulfation roasting is more efficient in reducing chloride content than other roasting processes. The water washing process can totally remove water-soluble chloride at a solid to liquid ratio of 1:10. However, the remaining water-insoluble substance is difficult to dechlorinate. For example, lead chloride forms a hydroxyl-halide (PbOHCl) and lead chloride carbonate (Pb2CO3Cl2) agglutinative matrix that is hard to wash away.

Original languageEnglish
Pages (from-to)639-644
Number of pages6
JournalJournal of Hazardous Materials
Volume190
Issue number1-3
DOIs
Publication statusPublished - 2011 Jun 15

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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