The carbonaceous materials in blast furnace dusts extracted by acid-washing treatment and pyrolytic coke were examined by Raman spectroscope. The first-order spectra were suited best with a combination of four Lorentzian bands (G, Dl, D2, D4) at about 1580,1350, 1620, 1200 cm"1, respectively and a Gaussian band(D3) at about 1500cm~(-1). A curve fitting method was employed to determine the spectroscopic parameters of those bands. Furthermore, the combustion reactivity of dusts was found to have good relations with the relative intensity ratios. The carbon in bag dust had more active sites than that in gravitational dust, thus it has a higher combustion activity. Compared to the carbon in dusts, that in coke fines had a higher combustibility before the carbon conversion of about 0.8, mainly attributed to its more active sites with sp~2 bond form whose activity were inferred they were superior to that mixed sp~2-sp~3 bond form.
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