VOD METHOD FOR VOD REFINING FERRITIC STAINLESS STEEL

摘要

A VOD refining method of a ferritic stainless steel is disclosed. An embodiment of the present invention is a method for producing a ferritic stainless steel comprising the steps of: blowing oxygen to decarburize molten steel; deoxidizing the molten steel by inputting a deoxidizer; and adjusting the components of molten steel subjected to decarburization and deoxidization. In the refining method, the deacidifying agent input amount is obtained by the following equation (1), the additional deacidifying agent input amount for correcting the actual water amount ratio is calculated by the following equation (7), the deoxidizing agent is added to the molten steel in the amount of the deacidifying agent input amount The present invention also provides a VOD refining method of a ferritic stainless steel. [Formula 1] (Amount of deoxidizing agent (kg) required for chromium oxide reduction (kg)) + (deoxidant content (kg) required for dissolved oxygen removal) + (deoxidant content (kg) [Equation 7] (The amount of additional deoxidizer input (kg)) = -0.408 占 (temperature of VOD arrival molten steel (占 폚)) + 6.53 占 ((temperature of molten steel after oxygen blowing) - 0.00549 × (molten steel amount (kg)) - 0.873 × (amount of oxygen used for decarburization in kg) + 19.7 × (decarburization efficiency (%)) + 30 ×