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A thermochemical model description of CaO-SiO2-Al2O3 silicate system

China Foundry 2023年第6期20卷 480-490页

作者： Qiu-lin Wen Feng-man Shen Hai-yan Zheng Yun-bao Gao Yu Wang Yan-chun Lou National Key Laboratory of Advanced Casting Technologies Liaoning Academy of Materials 3. School of Metallurgy Northeastern University

A thermochemical model based on the ion and molecule coexistence theory(IMCT) was developed to calculate thermodynamic data in the CaO-SiO2-Al2O3slag system, considering the influential role of oxide activities on the thermodynamic properties of slags. Using this model, iso-activity contours were obtained for oxide components CaO, SiO2and Al2O3in this system at temperatures of 1,873 K and 1,773 K. When compared with the IMCT model, it is found that the predicted activities of oxide components in the CaO-SiO2-Al2O3system using the model developed in this study better matches experimental data from literature in terms of both trend and numerical value. Therefore, the model developed in this study can serve as a robust modeling tool for metallurgical processes, and the thermodynamic data predicted by this new model can be used to improve the metallurgical technology.

关键词： thermochemical model CaO-SiO 2 -Al 2 O 3 slag system thermodynamic properties molecule coexistence theory TG223 A

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A thermochemical model description of CaO_(2)-SiO2-Al_(2)O_(3) silicate system

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China Foundry 2023年第6期20卷 480-490页

作者： Qiu-lin Wen Feng-man Shen Hai-yan Zheng Yun-bao Gao Yu Wang Yan-chun Lou National Key Laboratory of Advanced Casting Technologies Shenyang 110022China Liaoning Academy of Materials Shenyang 110004China School of Metallurgy Northeastern UniversityShenyang 110819China

A thermochemical model based on the ion and molecule coexistence theory(IMCT)was developed to calculate thermodynamic data in the CaO-SiO_(2)-Al_(2)O_(3) slag system,considering the influential role of oxide activities on the thermodynamic properties of slags.Using this model,iso-activity contours were obtained for oxide components CaO,SiO_(2) and Al2O3 in this system at temperatures of 1,873 K and 1,773 K.When compared with the IMCT model,it is found that the predicted activities of oxide components in the CaO-SiO_(2)-Al_(2)O_(3) system using the model developed in this study better matches experimental data from literature in terms of both trend and numerical value.Therefore,the model developed in this study can serve as a robust modeling tool for metallurgical processes,and the thermodynamic data predicted by this new model can be used to improve the metallurgical technology.

关键词： thermochemical model CaO-SiO_(2)-Al_(2)O_(3)slag system thermodynamic properties molecule coexistence theory

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