(1. 昆明理工大學(xué) 真空冶金國家工程實驗室昆明，昆明650093；
2. 昆明理工大學(xué) 云南省有色金屬真空冶金重點實驗室昆明，昆明650093；
3. 昆明理工大學(xué) 復(fù)雜有色金屬資源清潔利用國家重點實驗室，昆明650093)
摘 要: 采用正規(guī)溶液模型、亞正規(guī)溶液模型以及分子相互作用體積模型(MIVM)預(yù)測了Pb-Sb、Pb-Sn、Pb-Bi、Pb-Ag、Pb-Cu、合金組元的活度，并計算了模型的預(yù)測偏差。結(jié)果表明：MIVM的平均相對偏差均小于10.7550%，絕對偏差小于0.0481，采用MIVM預(yù)測鉛基合金組元的活度是可靠的。在此基礎(chǔ)上，采用MIVM，結(jié)合真空冶金及氣液平衡理論，建立了二元合金體系的氣-液平衡(Vapor-liquid equilibrium, VLE)預(yù)測模型。采用模型計算了上述鉛基合金的VLE數(shù)據(jù)，并繪制了VLE相圖(包括T-x(y)和p-x(y)相圖)，最后采用VLE實驗數(shù)據(jù)對其可靠性進行了檢驗，結(jié)果表明：VLE的模型預(yù)測值與實驗值吻合，本文建立的鉛基合金體系氣-液平衡預(yù)測模型是可靠的，為鉛基合金真空蒸餾設(shè)備的改進及過程控制、優(yōu)化提供了可靠的模型。
關(guān)鍵字: 真空蒸餾；鉛基合金；活度；VLE；熱力學(xué)模型
（1. National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China？
2. Key Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province, Kunming University of Science and Technology, Kunming 650093, China？
3. State Key Laboratory Breeding Base of Complex Nonferrous Metal Resources Clear Utilization in Yunnan Province, Kunming University of Science and Technology, Kunming 650093, China）
Abstract:the activity of Pb-Sb, Pb-Sn, Pb-Bi, Pb-Ag, Pb-Cu alloys was predicted by the regular solution model, the sub-regular solution model and the molecular interaction volume model (MIVM).The prediction deviation of the model was calculated. The results show that the average relative deviation of MIVM is less than 10.7550% and the absolute deviation is less than 0.0481. The activity of MIVM prediction of the lead based alloy components is reliable. On this basis, the vapor liquid equilibrium prediction model of binary alloy system was established using MIVM, vacuum metallurgy and theory of vapor liquid equilibrium. The VLE data of the lead based alloy were calculated by the model, and the VLE phase diagram (including T-X-y) and P-X-y) phase diagram) was drawn. Finally, the reliability was tested by the experimental data of VLE. The results show that the predicted value of the model is in agreement with the experimental value. The prediction model of the vapor liquid equilibrium of the lead based alloy system established in this paper is feasible. It provides a reliable model for improvement and process control and optimization of lead based alloy vacuum distillation equipment.
Key words: vacuum distillation; lead based alloy; activity; VLE; thermodynamic model
