Improvements in or relating to the manufacture of steel, or iron or steel alloys

摘要

517,813. Steel; alloys. CAMPBELL, W. J., CHIVERTON, A. H., and GARDINER, H. N. Aug. 2, 1938, No. 22780. [Classes 72 and 82 (i)] In the manufacture of steel, alloy steels or irons, molten iron is introduced into a convertor and blown to remove the impurities by oxidation and combustion, the blast stopped and the slag removed, carbon or alloying elements added and the charge heated up to casting temperature by one or more electrodes inserted through openings in the walls of the converter. The carbon or alloying elements in granulated or powdered form are contained in a sealed container connected to the blast pipe of the converter so that the carbon &c. is introduced into the charge by the blast. When making alloy irons, carbon, silicon and manganese are introduced with the alloying elements, which may be in the form of ferroalloys. Examples of the alloying elements are nickel, chromium, copper, cobalt, titanium, molybdenium, manganese and silicon.