Abstract
The phase compositions of high Ti bearing titanomagnetite sinter with different contents of B2O3 were studied at 1623 K under an oxygen partial pressure of 5×10−3 atm. The results showed that B2O3 mainly gathered in Ca2SiO4 phase and formed 2CaO.xSiO2.2/3(1−x)(B2O3) phase. The appearance of B2O3 can restrain the precipitation of CaTiO3 and 2CaO.xSiO2.2/3(1−x)(B2O3) and promote the amount of Fe bearing mineral phase in the current experimental condition. In addition, the shape of CaTiO3 changed from bulk to strip type with the increase in B2O3 content. The formula of silicoferrite of calcium and aluminium changed from 1·6CaO.4·9Fe2O3.Al2O3.1·8SiO2 to 2·5CaO.5·9Fe2O3.Al2O3.2·6SiO2, and the formula of dicalcium (boron) silicate changed from 2CaO.SiO2 to 2CaO.0·33SiO4.0·45B2O3 when B2O3 content was from 0 to 2·0 mass-% in the sinter. The change of phase compositions with the addition of B2O3 in the sinter will be beneficial for improving its metallurgical properties.
Published Version
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