Molten iron dephosphorizing agent, refining agent and dephosphorizing method

摘要

A molten iron dephosphorizing agent containing 2-20 mass% Al2O3, the balance being calcium ferrite and impurities and the (Al2O3 mass%)/(CaO mass%) ratio being 0.04-0.5. Dephosphorization of molten iron is performed by adding a refining agent comprising said dephosphorizing agent into a converter furnace.