Characterization study of electric arc furnace dust phases

Abstract

Electric arc furnace dust (EAFD) is a solid waste generated in the collection of particulate material during steelmaking process in electric arc furnace. The aim of this work is to carry out a chemical and structural characterization of two EAFD samples with different Zn contents. Optical emission spectroscopy via inductively coupled plasma (ICP), X ray diffractometry (XRD) and Mössbauer spectroscopy analysis were carried out in such EAFD samples. From XRD measurements, the samples exhibits the following phases: ZnFe2 O4, Fe3,O4, MgFe2 O4, FeCr2 O4, Ca0.15 Fe2.85 O4, MgO, Mn3 O4.Si O2 and ZnO. The phases detected by Mössbauer spectroscopy were: ZnFe2 O4, Fe3 O4, CaO.15 Fe2.85 O4 and FeCr2 O4. Magnesium ferrite (MgFe2O4), observed in the XRD patterns as overlapped peaks, was not identified in the Mössbauer spectroscopy analysis.