Application and development of inclusion control and removal technology in Ansteel
KANG Wei1,2, LI Hong1,2, LIAO Xiangwei1,2, ZHU Xiaolei1,2, YANG Ji1,2
1. Key Laboratory of Metal Materials for Marine Equipment and Application, Anshan 114009, Liaoning, China; 2. Ansteel Group Iron and Steel Research Institute,Anshan 114009,Liaoning,China
Abstract：Inclusions have significant impact on the performance and surface quality of steel.Various attempts and studies have been made focus on inclusion control and removal. Such as injecting ultrafine CaO powder into molten steel,adding ultrafine powder composite balls into molten steel, as well as industrial trial on injecting ultrafine CaO powder into molten steel and adding composite balls into molten steel at RH.Circular composite inclusions are formed in the molten steel by injecting ultrafine CaO powder into molten steel or adding ultrafine powder composite balls,and most of them aggregating and floating out of steel.Most of inclusions in the slab are circular and size around 2 μm after injecting ultra-fine CaO powder, the numerical density and area percentage content of the inclusions decrease significantly of EH36 steel. T[O] significantly decrease after adding composite balls into automobile plate steel, the lowest T[O] reach 0.001 3% in tundish and 0.000 5% in the slab.
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KANG Wei, LI Hong, LIAO Xiangwei, ZHU Xiaolei, YANG Ji. Application and development of inclusion control and removal technology in Ansteel. CONTINUOUS CASTING, 2024, 43(1): 78-84.
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