基于分子相互作用体积模型(MIVM),使用牛顿迭代方法结合无限稀活度系数实验数据γ∞计算对势能相互作用参数Bij和Bji;然后使用参数Bij和Bji计算Pb-Sb、Pb-Ag及Sb-Cu二元合金体系的活度α和活度系数γ,并与实验值进行比较分析;最后计算Pb-Sb、Pb-Ag及Sb-Cu二元合金体系的气液相平衡组成.气液相平衡组成计算结果表明:活度计算值和实验值吻合较好; Pb-Ag和Sb-Cu体系中的组元均能通过真空蒸馏实现良好分离,而Pb-Sb体系中的组元不能通过一次真空蒸馏实现完全分离.分子相互作用体积模型用于预测二元合金体系的活度及真空蒸馏分离效果具有很高的可靠性,为真空蒸馏分离二元合金提供良好的理论依据.
@@@@Based on the molecular interaction volume model (MIVM), the pair-potential energy interaction parameters Bij and Bji were calculated by using the Newton–Raphson methodology with the aid of experimental data of infinite dilution activity coefficientγ∞. Then, the activities and activity coefficients of the components of Pb-Sb, Pb-Ag and Sb-Cu alloys can be obtained from Bij and Bji, a comparison between the calculated and experimentally determined values of activities was also executed. Finally, the vapor-liquid phase equilibrium compositions of components of Pb-Sb, Pb-Ag and Sb-Cu alloys were calculated. The results show that the agreement between the calculated and experimentally determined values of activities is excellent. The vapor-liquid phase equilibrium composition indicates that the components of Pb-Ag and Sb-Cu alloys can be separated from each other thoroughly by vacuum distillation, the components of Pb-Sb alloy cannot be separated by vacuum distillation one time. The above analysis results indicate that the validity and reliability of the MIVM in the activities calculation of the components of these alloys and the prediction of the separating effect in vacuum distillation are good. This research provides a good theoretical principle for the separation of binary alloys by vacuum distillation.
参考文献
| [1] | 戴永年 .铅?锡合金(焊锡)真空蒸馏[J].有色金属:冶炼部分,1977,9:24-30. |
| [2] | 戴永年;赵忠.真空冶金[M].北京:冶金工业出版社,1988:20-24. |
| [3] | 何德文,刘蕾,肖羽堂,周欢年.真空冶金回收废旧锌锰电池的汞和镉试验研究[J].中南大学学报（自然科学版）,2011(04):893-896. |
| [4] | Han Long,韩龙,杨斌,杨部正,戴永年,刘大春,徐宝强.热镀锌渣真空蒸馏回收金属锌的研究[J].真空科学与技术学报,2009(z1):101-104. |
| [5] | 陈为亮,杨斌,柴立元,闵小波,戴永年,于霞,张传福.Vacuum distillation refining of crude lithium (Ⅰ)——Thermodynamics on separating impurities from lithium[J].中国有色金属学会会刊(英文版),2001(06):937-941. |
| [6] | 徐宝强,裴红彬,杨斌,刘大春,曲涛,戴永年.真空碳热还原脱除红土镍矿中镁的研究[J].真空科学与技术学报,2011(03):341-347. |
| [7] | 李亮,刘大春,杨斌,徐宝强,唐万启.真空蒸馏铅阳极泥制备粗锑的研究[J].真空科学与技术学报,2012(04):301-305. |
| [8] | Yang, H.;Xu, B.;Yang, B.;Ma, W.;Tao, D..Calculation of phase equilibrium in vacuum distillation by molecular interaction volume model[J].Fluid Phase Equilibria,2012:78-81. |
| [9] | TAO Dong-ping;LI Deng-fang;YANG Bin .Prediction of the thermodynamic properties of quaternary liquid alloy by modified coordination equation[J].Thermochimica Acta,2002,383:45-51. |
| [10] | Dong Ping Tao .Prediction of thermodynamic properties of the C-Fe-Co-Ni solid solutions by binary infinite dilute activity coefficients[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):70-75. |
| [11] | HILDEBRAND J H .The activities of molten alloys of thallium with tin and lead[J].Journal of the American Chemical Society,1929,51(01):66. |
| [12] | HARFY H K .A"sub-regular”solution model and its application to some binary system[J].ACTA METALLURGICA,1953,1(02):202-209. |
| [13] | LUPIS C H P;ELLIOTT J F .Prediction of enthalpy and entropy interaction coefficients by the "central atoms” theory[J].ACTA METALLURGICA,1967,15(02):265-276. |
| [14] | WILSON G M .Vapor-liquid equilibrium.Ⅺ. A new expression for the excess free energy of mixing[J].Journal of the American Chemical Society,1964,86(02):127-130. |
| [15] | ZHOU Guo-zhi;WEI Shou-kun .A new generation solution model for predicting thermodynamic properties of a multi-component system from binaries[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,1997,28:439-445. |
| [16] | 乐启炽,张新建,崔建忠,路贵民.金属合金溶液热力学模型研究进展[J].金属学报,2003(01):35-42. |
| [17] | Tao DP. .A new model of thermodynamics of liquid mixtures and its application to liquid alloys[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,2000(1/2):105-113. |
| [18] | PREDEL B;BORNSTEIN LANDOLT.Group Ⅳ:Physical chemistry[M].Berlin,Heidelberg,New York:Springer,2006 |
| [19] | LIDA T;GUTHRIE R I L.The physical properties of liquid metals[M].Oxford:Clarendon Press,1988 |
| [20] | FERRO R;SACCONE A.Structure of solids[M].Weinheim:VCH Verlagasgesellschaft,1993:704-713. |
| [21] | 戴永年.有色金属真空冶金[M].北京:冶金工业出版社,1998:110-116. |
| [22] | HULTGREN R;DESAI P D;HAWKINS D T;GEISER M, KELLEY K K.Selected values of the thermodynamic properties of binary alloys[M].Metals Park,OH:American Society of Metals,1973 |
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