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International Journal of Minerals,Metallurgy and Materials 2017年第1期24卷 25-36页

作者： Xin Lu Takahiro Miki Tetsuya Nagasaka Graduate School of Engineering Tohoku University

To design optimal pyrometallurgical processes for nickel and cobalt recycling, and more particularly for the end-of-life process of Ni-Co-Fe-based end-of-life（EoL） superalloys, knowledge of their activity coefficients in slags is essential. In this study, the activity coefficients of NiO and CoO in CaO-Al_2O_3-SiO_2 slag, a candidate slag used for the EoL superalloy remelting process, were measured using gas/slag/metal equilibrium experiments. These activity coefficients were then used to consider the recycling efficiency of nickel and cobalt by remelting EoL superalloys using CaO-Al_2O_3-SiO_2 slag. The activity coefficients of NiO and CoO in CaO-Al_2O_3-SiO_2 slag both show a positive deviation from Raoult＇s law, with values that vary from 1 to 5 depending on the change in basicity. The activity coefficients of NiO and CoO peak in the slag with a composition near B =（%CaO）/（%SiO_2） = 1, where B is the basicity. We observed that controlling the slag composition at approximately B = 1 effectively reduces the cobalt and nickel oxidation losses and promotes the oxidation removal of iron during the remelting process of EoL superalloys.

关键词： recycling nickel cobalt end-of-life superalloys activity coefficients remelting slag

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Studies oh activity coefficients of ο -, m -, P- Xylene in Aqueous Salt Solutions(IV)

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Chemical Journal of Chinese Universities 1988年第3期 90-94页

作者： Xie Ximing Xie Wenhui(Department of Chemistry, Peking University, Beijing)

Introduction Salt effect studies are of both practical and theoretical *** 1889,Setschenow gave an empirical formula of salt effect

关键词： Salt effect activity coefficients

Component Evaporation of Ti-15-3 Melt during ISM Processing

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Journal of Materials Science & Technology 2001年第1期17卷 83-84页

作者： Yanqing SU Jingjie GUO HongSheng DING Songqing LIU Yuan LIU GuiZhong LIU and Jun JIA National Key Laboratory of Precision Hot Processing of Metals, Harbin institute of Technology, Harbin 150001, China Harbin Inst. of Technol. Harbin 150001 China

How to control melt composition is the key for getting high quality alloy melt. The paper made the following efforts: (1) The activity coefficients in Ti-15-3 melt have been calculated. (2) Taking advantage of the activity coefficients, the evaporation losses of components in Ti-15-3 melt during ISM process have been studied. The calculated results show that there is a critical vacuum degree (about 1.33 Pa) during melting process.

关键词： activity coefficients evaporation losses melting process vacuum degree high quality ISM process alloy melt

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Local Structure and Dynamics Procedure of Impurities Fe,Al and Mn in Melt Beryllium

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稀有金属材料与工程 2024年第11期53卷 3046-3052页

作者： Zhang Jiqiang Jin Lei Luo Jiangshan Luo Bingchi Wu Weidong Research Center of Laser Fusion China Academy of Engineering PhysicsMianyang 621900China

The local structure and dynamics of impurities Fe,Al and Mn in beryllium were investigated on an atomic scale using ab initio molecular dynamics and statistical physics *** analysis of the radial distribution function centered on impurity atoms shows that the density of beryllium atoms around Fe and Mn is 8.4%and 8.6%higher than that around Al,*** statistics of the measure square displacement of impurity atoms show that the diffusion coefficients of Al atoms are 114%and 133%larger than that of Fe and Mn atoms in the melt beryllium,*** analysis of velocity autocorrelation function of impurity atom shows that Fe and Mn atoms collide strongly with beryllium atoms in the first coordination layer,indicating that they are tightly surrounded and bound by the surrounding beryllium atoms in the central position,while the beryllium atoms around Al are loosely arranged and have weak binding forces with *** analysis of the activity coefficients of the impurities shows that when Fe or Mn enters the melt beryllium,it reduces the free energy of the system,whereas when Al enters,it increases the system *** summary,the interatomic force of BeAl is weak,so they do not form intermetallic compounds,and Al diffuses quickly in *** BeFe and BeMn have strong interatomic forces,and tend to form more BeFe and BeMn bonds to reduce the free energy of the system,so Fe and Mn diffuse slowly in *** initio molecular dynamics can be used to forecast the best experimental temperature for the vacuum distillation of beryllium.

关键词： beryllium purification ab initio molecular dynamics local structure activity coefficients

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Calculating the activity Coefficient of Phosphate in Various Diluent by the UNIFAC Method

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Chemical Journal of Chinese Universities 1988年第3期 34-39页

作者： Wang Liya Zhong Yunxiao(Department of Technical Physics, Peking University, Beijing)

This paper extends the UNIFAC method to calculate tne pnospnate-_ diluents systems. The parameters of interaction between (-O)3 P-O and CH2, CCl4 , CHCl3, ACH, ACCl, CH-O, H2O etc. are determined with the experimental data of Tri-iso-butylphosphate(TiBp)-diluents and Tri-(2-ethyl)hexylphosphate(TEHP)-diluents systems. These parameters were applied to calculate the activity coefficient of TBP-diluents and TEHP-diluents systems. The result agrees excellently with experimental data.

关键词： UNIFAC method Phosphate activity coefficients

Thermodynamic study of CsCl + NH4Cl + H2O ternary systems by potentiometric method at 298.2 K

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Thermodynamic study of CsCl + NH4Cl + H2O ternary systems by...

Glycerol—A Viable Solvent for Absorption of Highly Polar Solutes I: Behaviour of Molecular Interactions

中国化学会第六届全国热分析动力学与热动力学学术会议

作者：李爽 Shuni Li Quanguo Zhai Yucheng Jiang Mancheng Hu 陕西师范大学化学化工学院 Key Laboratory of Macromolecular Science of Shaanxi Province School of Chemistry and Chemical Engineering Shaanxi Normal University

Thermodynamic properties of CsCl + NH

关键词： Potentiometric CsCl NH4Cl Pitzer model activity coefficients

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Glycerol—A Viable Solvent for Absorption of Highly Polar So...