Influence of B2O3 on Viscosity of High Ti-bearing Blast Furnace Slag

The influence of B2O3 on the viscosity of high Ti-bearing BF slag is studied under Ar atmosphere from 1773 K (1500°C) to about 1593 K (1320°C). The results show that the addition of B2O3 can decrease the viscosity of high Ti-bearing BF Slag containing UPC, consequently improve its fluidity. With the...

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Veröffentlicht in:ISIJ International 2012, Vol.52(6), pp.984-991
Hauptverfasser: Ren, Shan, Zhang, Jianliang, Wu, Liushun, Liu, Weijian, Bai, Yanan, Xing, Xiangdong, Su, Buxin, Kong, Dewen
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Sprache:eng
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Zusammenfassung:The influence of B2O3 on the viscosity of high Ti-bearing BF slag is studied under Ar atmosphere from 1773 K (1500°C) to about 1593 K (1320°C). The results show that the addition of B2O3 can decrease the viscosity of high Ti-bearing BF Slag containing UPC, consequently improve its fluidity. With the existence of 1.5% UPC, when the content of B2O3 increased from 0 to 4.1%, the volume fraction of perovskite decreased from 7.7% to 1.6% at 1610 K. Meanwhile, the liquidus temperatures decreased from 1619 K to 1613 K. At a lower temperature, B2O3 was easy to form a eutectic and decreased the viscosity of molten slag. At a higher temperature, some tetrahedron [BO4]5– changed into triangle [BO3]3– which would disintegrate the chains/molecules of molten matrix and decreased its viscosity.
ISSN:0915-1559
1347-5460
1347-5460
DOI:10.2355/isijinternational.52.984