Patent ID: 6010658
Filing Date: 2000-01-04
Classification: C21C

Abstract:
Desulfurization apparatus for treating molten iron comprising:a ladle which receives the molten iron to be treated;feed vessels for the materials to be introduced into the molten iron for desulfurization, the materials including a magnesium reagent powder mixture;first and second lances, each lance having a single conduit through which the desulfurization materials may flow from the feed vessels into the molten iron in the ladle, the desulfurization materials creating a reaction zone when introduced into the molten iron; andfirst and second independently operable raising and lowering means capable of moving the first and second lances into and out of the ladle, the first raising and lowering means being connected to the first lance, and the second raising and lowering means being connected to the second lance, each of the first and second raising and lowering being capable of moving the associated lance from between a raised position where the lower end of the associated lance is spaced above the surface of the molten iron in the ladle and a lowered position where the lower end of the associated lance is spaced within the ladle at a proper location for desulfurization of the molten iron, the first and second raising and lowering means being spaced apart sufficiently so the reaction zones do not overlap even at maximum flow rate of desulfurization materials.