ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Thermodynamic Properties of the MgO-BO1.5-SiO2 System at 1723 K
Xianming HuangKyoshi AsanoToshiharu FujisawaZhitong SuiChikabumi Yamauchi
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1996 Volume 36 Issue 11 Pages 1360-1365

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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-BO1.5-SiO2 system have been investigated. Phase diagram and the activities of the constituent oxides of the MgO-BO1.5-SiO2 ternary system were determined at 1723 K by chemical equilibrium method. Thermodynamic calculations for the equilibrium between MgO-BO1.5-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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