|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||7th International Symposium on High Temperature Metallurgical Processing
||Origin and Evolution of Non-metallic Inclusions for Al-killed Steel during EAF-LF-VD-CC Process
||Haiyan Tang, Baojun Zhao
|On-Site Speaker (Planned)
The origin and evolution law of non-metallic inclusions for Al-killed casing steel during EAF-LF-VD-CC process were studied by industrial tracer experiments. The modification mechanism of Al2O3 and MgO•Al2O3 spinel and MnS after calcium treatment were analyzed by thermodynamics, and the system of Ca-Si wire fed in the factory was evaluated on the theoretical and experimental basis. The results show that most of the macroinclusions come from entrapped ladle and mold slags, and microinclusions from deoxidation and temperature decreasing in the process of casting. In addition, Al2O3 can be wholly modified into 12CaO•7Al2O3 和3CaO•Al2O3 inclusions which are liquid at steelmaking temperature, while MnS can not be wholly modified into pure CaS only wrapping outside the alumina or calcium aluminate in the form of (Ca,Mn)S under the present amount of Ca-Si wire fed.
||Planned: A print-only volume