CHARACTERIZATION OF SINTERING DUST, BLAST FURNACE DUST AND CARBON STEEL ELECTRIC ARC FURNACE DUST

摘要

In order to make a complete understanding of steel plant metallurgical dusts and to realize the goal of zero-waste, a study of their properties was undertaken. For these purposes, samples of two sintering dusts (SD), two blast furnace dusts (BFD), and one electric arc furnace dust (EAFD) taken from the regular production process were subjected to a series of tests. The tests were carried out by using granulometry analysis, chemical analysis, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy via SEM (EDS), and Fourier transform infrared spectroscopy (FTIR). The dominant elements having an advantage of reuse are Fe, K, Cl, Zn, C. The dominant mineralogical phases identified in sintering dust are KC1, Fe_2O_3, CaCO_3, CaMg(CO_3)_2, NaCl, SiO_2. Mineralogical phases exist in blast furnace dust are Fe_2O_3, Fe_3O_4, with small amount of KC1 and kaolinite coexist. While in electric arc furnace dust, Fe_3O_4, ZnFe_2O_4, CaCO_3, CaO, Ca(OH)_2 are detected.