MANUFACTURE OF VERY LOW PHOSPHORUS STEEL

摘要

PURPOSE:To protect a molten iron transferring vessel and to obtain very low P steel at a low cost by dephosphorizing molten iron desiliconized and dephosphorized slightly by adding converter slag with a soda ash-base flux. CONSTITUTION:Molten iron transferred from a blast furnace with a molten iron transferring vessel is predesiliconized by adding an oxygen feeding source as required. The predesiliconized molten iron is desiliconized and dephosphorized slightly by adding converter slag. After discharging the slag, a soda ash-base flux is added to dephosphorize the molten iron, and the dephosphorized molten iron is transferred to a converter and discharged as steel.