Method for Improving Cleanliness and Desulfurization Efficiency of Molten Steel

摘要

The invention converter tapping 1-2 as high on the reservoir of molten steel production method of the Clean in secondary refining process, put the proper amount of the aluminum during converter tapping, and properly controlling the injection amount of argon gas in the bubbling process, burrs bullying when by the removal of aluminum and flux of scattered quicklime and fluorite, etc. natang site generated continuously and to put a small amount to provide a method capable of producing a reservoir of molten steel cleanliness, and with that purpose. ; The present invention is directed to a method by blowing argon gas to the molten steel in the tapping the refined molten steel in a converter to a ladle, and ray for producing a reservoir of molten steel, including the step of the molten steel bubbling, ladle dissolved aluminum in the molten steel the content of the de-commitment of aluminum interspersed among the converter to be tapped and 0.01 to 0.03 wt.%; Injection flow rate of the argon gas is set to 1.5 ~ and 10.0Nl / min; And natang sites generated during the bubble, for the removal of aluminum scattered the 0.06 ~ 0.12kg continuous commitment and division, and the flux of calcium oxide and calcium fluoride with respect to the molten steel in 1 tons 1 tons, respectively, and 0.2 ~ 0.6 1 ~ 8kg the method of producing a reservoir of molten steel of high purity characterized in that the continuous division input kg as a base.; Clean, storage, steel, refining, aluminum, flux, bubbling