by DONG Yuanchi; WEI Shoukun;PENG Yuqiang; ZHU Yuankai (Beijing University of Iron and Steel Technology)
Cite this article:
by DONG Yuanchi; WEI Shoukun;PENG Yuqiang; ZHU Yuankai (Beijing University of Iron and Steel Technology). ACTIVITY OF As IN Fe-As-C-j MELTS. Acta Metall Sin, 1986, 22(6): 89-91.
Abstract Equilibrium experiments of iron melts containing As and saturated C with CaC_2-CaF_2 slag, which was saturated with CaC_2, were carried out under highly purified Ar atmosphere at 1350, 1425 and 1500℃. The free energy of the reaction 3(CaC_2)+2[As]=(Ca_3As_2)+6[C] is found to be △G°=-88150+29.80T(J), both As and Ca_3As_2 based on the infinitely dilute or 1% by weight solution standard. A plot of 1g fCα_3As_2 νS (%Ca_3As_2) gives values of the activity coefficient of Cα_3As_2. From the experimental equilibrium data of the quarternary system Fe-As-C-j where j=Si, Mn, P, values of 1g f_(As)~j can thus be evaluated. The interaction coefficients of the activity of As in iron melts e_(As)~j, are thus obtained as follow: e_(As)~(Si) e_(As)~(Mn) e_(As)~P 1350℃ 0.064 -0.035 0 1600℃ 0.057 -0.031 0
