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基于高温下CaO与CaS的互不溶性,应用自制的CaO-CaS坩埚在钙蒸气下进行了Cao(S)=[Ca]+[O]与CaS(S)=[Ca]+[S]同时平衡的实验。在密封的Mo反应室中,将盛有钙液的钼坩埚悬挂于低温带(1200—1400℃)中,盛有铁液的CaO-CaS坩埚置于高温带。当Ca-O,Ca-S平衡达到后,取出Mo反应室,水淬。用红外法及质谱法定硫,用原子吸收法定钙,用惰性气体载气熔化法定氧。本实验方法的特点是通过一组实验可同时测定两个平衡常数Kcas及Kcas及两个活度相互作用系数。在1600℃ Kcas=5.9×10~(-8) Kcao=5.5×10~(-9) E_S~(cα)=-104,E_O~(cα)=-475
Based on the mutual insolubility of CaO and CaS at high temperature, Ca (subscript S) = [Ca] + [O] and CaS (S) = [Ca] + [S] experiment of. In a sealed Mo reaction chamber, the molybdenum crucible containing calcium solution is suspended in a low temperature zone (1200-1400 ° C) and the CaO-CaS crucible containing molten iron is placed in a high temperature zone. When Ca-O, Ca-S balance reached, remove the Mo reaction chamber, water quenching. Determination of sulfur by infrared and mass spectrometry, calcium determination by atomic absorption, inert gas carrier gas melting method of determining oxygen. The experimental method is characterized by a set of experiments can simultaneously determine the two equilibrium constants Kcas and Kcas and the two activity interaction coefficient. Kcas = 5.9 × 10 -8 Kcao = 5.5 × 10 -9 E_S ~ (cα) = - 104 at 1600 ℃, E_O ~ (cα) = -475