炭素飽和フェロクロムと CaO-MgO-Al_2O_3-SiO_2 系スラグ間のクロムおよび硫黄分配(新プロセス技術)(<特集>製銑技術の拡大と高度化)

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Experiments have been made to measure the chromium and sulphur distributions between carbon-saturated Cr-Fe-C alloy and CaO-MgO-Al_2O_3-SiO_2 slag at 1550 and 1598℃. The reduction of SiO_2 proceeds very slowly, so that its equilibrium is not attained within the present duration of rum. However, the following reactions are so rast that the local equilibria corresponding to the propgress of the SiO_2 reduction are attained. [Cr]+1/2(SiO_2)=(CrO)+1/2[Si] [S]+(MO)+1/2[Si]=(MS)+1/2(SiO_2) Based on the above reactions, the chromium and sulphur distributions between metal and slag have been analyzed with respect to temperature, slag composition and optical basicity (Λ). The main equations obtained are as follows : log(%Cr)[%Si]^<1/2>/[%Cr]=-3.59(N_<CaO>+0.5N_<MgO>-0.1N_<Al_2O_3>-N_<SiO_2>)-4260/T-0.02 log(%S)[%Si]^<1/2>/(%S)=-3.69(N_<CaO>+0.6N_<MgO>-0.3N_<Al_2O_3>-N_<SiO_2>)-29840/T+14.62 log(%S)[%Si]^<1/2>/(%S)=14.9Λ-31270/T+24.96 The validity of these equations have been discussed in comparison with the data reported by the other invesigators.
社団法人日本鉄鋼協会の論文
1987-11-01