METHOD FOR CONTROLLING CARBON IN MOLTEN STEEL IN CONVERTER

摘要

PURPOSE:To improve the yield and to shorten steelmaking time by continuously estimating oxygen efficiency for decarbonization in molten steel, etc., using measured values for quantity and components in blowing waste gas from a converter, correcting decarbonizing presuming curve on this and executing calculation for blowing out. CONSTITUTION:The quantity and components in the blowing waste gas generated from the converter during refining are continuously measured. Further, a decarbonizing model, which expresses unifiedly the oxygen efficiency for decarbonization in the ordinary blowing over the whole carbon range is obtd. The above measured value is introduced into this model, and carbon concn. in the molten steel and oxygen efficiency for decarbonization in the molted steel are continuously estimated. Successively, based on this estimated value, preset decarbonizing presuming curve is corrected and the calculation for blowing out is executed.