• Đorđievski, Stefan
• Trifunović, Vanja
• Gardic, Vojka
• Dimitrijevic, Silvana
• Avramovic, Ljiljana
• Jonovic, Radojka
• Milic, Snezana

Abstract

<jats:p>Dust from an electric arc furnace is formed as the main by-product of thesteel production process from the secondary iron-based raw materials. Thisdust has significant contents of Zn and Fe, as well as Pb, Cd, Ca, Mg, Cr,Mn, Si, Ni, Cu, F, Cl and other elements and is considered hazardousindustrial solid waste since it contains heavy metals. In order to protectthe environment and public health from the negative impact of this type ofhazardous waste, it is necessary, even mandatory, to carry out its treatmentin accordance with the legislation of the country where it is located.Before applying any treatment of the electric arc furnace (EAF) dust, it isnecessary to perform its detailed characterization. In this paper, thefollowing characterization of EAF dust originating in the Republic ofSerbia was performed: physical-mechanical and chemical characterization,determination of granulometric composition, and mineralogicalcharacterization. Also, the EAF dust impact on the environment and humanhealth was assessed (Leachability and Toxicity Characteristic LeachingProcedure (TCLP) tests). The results have shown that the Zn content is inthe range 32 to 35 % and that the main mineralogical phases of the dust arezincite, franklinite, magnetite, and magnesioferrite. Granulometric analysishas shown that 80 % of the sample consists of particles less than 26 ?m insize. According to the leaching test results, the EAF dust is characterizedas a hazardous waste due to the increased chloride content, while the TCLPtest indicated dust toxicity due to the increased contents of Zn, Cd, andPb.</jats:p>

Topics

• impedance spectroscopy
• phase
• laser emission spectroscopy
• leaching
• iron
• toxicity
• chloride content