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研究测定了镍液中钇和铈的脱硫氧常数(K=a_(RE)~2·a_o~2·a_s)和硫氧化物Y_2O_2S和Ce_2O_2S的标准生成自由能(J/mol)与温度的关系式: Y_2O_2S:lgK=—33146/T+3.85,△G°=—634460+73.69T, Ce_2O_2S:lgK=—51450/T+12.46,△G°=—984850+238.50T 1600℃的Ni-Y-S-O和Ni-Ce-S—O体系的平衡相图提供了预测镍液中钇和铈的平衡相生成的先后次序和类型的依据。并给出了镍液中加钇、铈控制夹杂物形态的公式以及钇、铈的加入量与氧、硫含量之间的函数关系。
The relationship between the standard formation free energy (J / mol) of desulfurization oxygen species (K = a RE (RE) ~ 2 · a_o ~ 2 · a_s) and the sulfur oxides Y_2O_2S and Ce_2O_2S The formula: Y_2O_2S: lgK = -33146 / T + 3.85, ΔG ° = -634460 + 73.69T, Ce_2O_2S: lgK = -51450 / T + 12.46, ΔG ° = -984850 + 238.50T The Ni-YSO and The equilibrium phase diagram of the Ni-Ce-S-O system provides a basis for predicting the order and type of equilibrium phase formation of yttrium and cerium in the nickel solution. The formula of yttrium and cerium controlling inclusions in nickel solution as well as the functional relationship between the added amount of yttrium and cerium and oxygen and sulfur contents are given.