铁液脱磷的热力学关系含磷铁液的脱磷,只有在氧化性条件下才有可能。脱磷的最简单模型为5(?)+2(?)=P_2O_5(渣) (1)这个反应的标准自由能变化为ΔG_1~0=-168,600+133.0T氧和磷浓度都不大时,可假定其活度等于浓度。那时反应(1)的平衡常数可写作K_1=(a_(P_2O_5))/([O]~5·[P]~2) (2)因为ΔG~0=-RTlnK,从上面的ΔG_1~0得出logK_1=36,850/T-29.07 (3)假定渣中饱和了 P_2O_5,即 a_(P_2O_5)=1,则 The thermodynamic relationship of molten iron dephosphorization dephosphorization of iron-containing liquid iron, only under oxidative conditions is possible. The simplest model of dephosphorization is 5 (?) + 2 (?) = P 2 O 5 (slag) (1) The standard free energy of this reaction changes as ΔG_1-0 = -168,600 + 133.0T, It can be assumed that its activity is equal to the concentration. At that time, the equilibrium constant of the reaction (1) can be written as K_1 = (a_ (P_2O_5)) / ([O] ~5 · [P] ~ 2). Since ΔG ~ 0 = -RTlnK, We get logK_1 = 36,850 / T-29.07 (3) Suppose the slag saturated P_2O_5, that is, a_ (P_2O_5) = 1, then