Effect of microsilica in MgO based castables on oxygen content of interstitial free steel

被引：16
作者：
Li, N [1 ]
Li, HL [1 ]
Wei, YW [1 ]
机构：
[1] Wuhan Univ Sci & Technol, Hubei Prov Key Lab Refractories & Ceram, Wuhan 430081, Hubei, Peoples R China
来源：
BRITISH CERAMIC TRANSACTIONS | 2003年 / 102卷 / 04期
关键词：
Castable - Interstitial free steel - Microsilica - Molten steel - Total oxygen content;
D O I：
10.1179/096797803225004963
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Samples of interstitial,free (IF) steel were heated at 1600 degreesC for 90 min in graphite crucibles lined with MgO based custables bonded with microsilica. The total oxygen content (TOC) of the IF steel was determined for castables with various microsilica contents, and inclusions in the steel and refractory were characterised by SEM and EDS. As the microsilica content in the MgO castable increased from 3 to 7 wt-%, the TOC of the IF steel decreased. It is proposed that this is due to the,formation of a viscous liquid layer between the molten steel and the refractory. This liquid layer prevents dissolution of oxides from the refractory into the molten steel and so decreases the TOC of IF steel. In addition, the liquid layer may act as an absorber for oxide inclusions in the molten steel.
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页码：175 / 179
页数：5
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