Production of stainless steel of aisi 4xx grade ferritic steel in an aod converter

Abstract From the Canadian patent

For the production of stainless steel of the ferritic AISI 4xx group of steels, particularly the AISI 430 group of steels based on liquid pig iron , and, FeCr solids the invention proposes the use of the AOD (Argon Oxygen Decarburization) process in which oxygen and inert gas (inactive gas) together are blown into the bath through nozzles and top-blown onto the surface of the bath by a blowing lance. The aim of the treatment is to conclude a smelting charge within an optimal time period to achieve the, intended tapping temperature and composition and to minimize chromium, losses. This is achieved by a correspondingly applied technology and by means of a metallurgic process model which …