Abstract
A LD steelmaking slag (S1) has been successively treated by salicylic acid in methanol and nitric acid, leaving two residues respectively called R1 and R2. Samples S1, R1 and R2, and two samples of dicalcium ferrite (C 2F) and mangano-wustite (MW), used as references, are investigated by Mössbauer spectroscopy. The presence in S1 and R1 of an impure C 2F phase is confirmed. The MW phase of the slag has different hyperfine parameters from the synthetic MW, although both samples are very similar from X-ray diffraction data and electron microprobe analysis. Fe 3+ and Fe 2+ percentages in the different phases are determined by Mössbauer spectroscopy.
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