Application and development of inclusion control and removal technology in Ansteel
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 inclu-sions 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.
inclusion control and removalinclusion removal by blowing external powderultrafine CaO powderadding composite balls into molten steel at RH
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