Decarburizing molten metal Patent #: 4260415
ApplicationNo. 06/729002 filed on 04/30/1985
US Classes:420/71, Processes75/543, Elemental metal or elemental Silicon(Si)75/546, Noble gas or inert gas not otherwise identified75/554, Including other gas from above75/557Including other gas from below
ExaminersPrimary: Rosenberg, Peter D.
Attorney, Agent or Firm
International ClassesC21C 5/00 (20060101)
C21C 7/068 (20060101)
AbstractA method for refining a molten metal bath is provided including introducing a refining gas containing substantially a combination of oxygen and nitrogen to the molten bath to reduce the carbon content of the bath to a selected level; thereafter an inert gas, such as argon, is introduced to the molten bath from a lance adapted to direct the inert gas onto or beneath the bath surface, whereby the inert gas serves to efficiently remove nitrogen from the bath.