Thermodynamic Properties of the MgO-BO1.5-SiO2 System at 1723 K

Xianming Huang; Kyoshi Asano; Toshiharu Fujisawa; Zhitong Sui; Chikabumi Yamauchi

doi:10.2355/isijinternational.36.1360

Thermodynamic Properties of the MgO-BO_1.5-SiO₂ System at 1723 K

Xianming Huang, Kyoshi Asano, Toshiharu Fujisawa, Zhitong Sui, Chikabumi Yamauchi

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Keywords: thermodynamics, phase diagram, activity, MgO-BO_1.5-SiO₂ system, Fe-B-Si-C alloy

JOURNAL FREE ACCESS

1996 Volume 36 Issue 11 Pages 1360-1365

DOI https://doi.org/10.2355/isijinternational.36.1360

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Abstract

In order to economically extract boron from a boric oxide bearing iron ore by blast furnace process, thermodynamic properties of the MgO-BO_1.5-SiO₂ system have been investigated. Phase diagram and the activities of the constituent oxides of the MgO-BO_1.5-SiO₂ ternary system were determined at 1723 K by chemical equilibrium method. Thermodynamic calculations for the equilibrium between MgO-BO_1.5-SiO₂ slag and carbon saturated Fe-B-Si-C alloy were performed and the suitable blast furnace slag composition for the recovery of boron was discussed.

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