Advanced Solution for Environmental Issues in EAF Meltshop

Posted on 09 June 2014
 

Advanced Solution for Environmental Issues in EAF Meltshop
Steel scrap, which is used as raw material for electric arc furnaces (EAF), is an essential industrial waste. However, as scrap includes heavy metals and organic matter such as oils, plastics, and paints, EAF operation can cause environmental problems. When scrap is melted in the EAF, dirty gas and particles may be released through gaps in the EAF, and noxious odors and dioxin may be emitted from the baghouse when combustion in the EAF is incomplete. In addition, clinker from EAF dust treatment plants may not satisfy leaching criteria. Technologies to eliminate these forms of contamination are common to municipal waste incinerators. However, the emission regulations applied to EAFs are less stringent than those applied to incinerators. Part of the reason is that incinerators handle greater amounts of contaminated and odor-producing materials, and are also simple waste disposal operations and not an intermediate process with a useful product, as is the case with EAFs. Moreover, imposition of stricter regulations on the steel industry in one country raises a question of fairness, as it may reduce international competitiveness. This paper discusses the following three environmental issues common to the EAF meltshop and the technologies to solve them when environmental improvement is required. 2012 SEAISI Seminar

 

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