METHOD FOR INTRODUCING DEOXYDIZING-DESULPHURIZING SUBSTANCES INTO A MASS OF LIQUID METALS WITHOUT THE USE OF GASEOUS CARRIERS, AND CORED SPIRAL TUBE THEREFOR

摘要

Solid substances are introduced into a bath of molten metal by pushing a hollow metal tube filled with the solid substance, through a tubular former that imparts a spiral shape to the carrier tube. The spiral rotates about a vertical axis as it descends into the bath of molten metal.