Thermodynamic optimization of the binary CaO-ZnO and ternary CaO-ZnO-SiO2 systems

被引：9

作者：

Shevchenko, M. ^{[1
]}

Jak, E. ^{[1
]}

机构：

[1] Univ Queensland, Pyromet Innovat Ctr PYROSEARCH, Brisbane, Qld 4072, Australia

来源：

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY | 2020年 / 70卷

基金：

澳大利亚研究理事会;

关键词：

Slags; Zinc; Calcium; Silica; Phase diagrams; Thermodynamic assessment; QUASI-CHEMICAL MODEL; PHASE-DIAGRAMS; PBO-ZNO; ZNO-SIO2; EQUILIBRIUM; PBO-SIO2;

D O I：

10.1016/j.calphad.2020.101800

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Liquidus phase equilibrium data of the present authors for the CaO-ZnO-SiO2 system (as a part of research program on the characterization of the multicomponent PbO-ZnO-FeO-Fe2O3-"Cu2O"-CaO-SiO2 system), combined with phase equilibrium and thermodynamic data from the literature, have been used to obtain a self consistent set of parameters of the thermodynamic models for all phases. The modified quasichemical model is used for the liquid slag phase; lime (Ca,Zn)O, zincite (Zn,Ca)O, alpha-and alpha'-dicalcium silicate (Ca,Zn)(2)SiO4 and tricalcium silicate (Ca,Zn)(3)SiO5 are described within Bragg-Williams formalism; tridymite, cristobalite SiO2, wollastonite, pseudowollastonite CaSiO3, rankinite Ca3Si2O7, willemite Zn2SiO4, melilite (hardystonite) Ca2ZnSi2O7 and Ca-Zn feldspar CaZnSi3O8 are treated as stoichiometric compounds. From these model parameters, the optimized ternary phase diagram is back calculated.

引用

页数：8

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