Steelmaking
AssigneeBritish Steel Corporation
InventorsIan K. MacGregor, Robert Scholey, Gene D. Spenceley
Life of this patent
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Abstract
The invention provides an arrangement for steelmaking comprising a steel melt and initial reaction chamber arranged to receive source material in the form of scrap and/or pre-reduced iron, an overhead lance for the introduction of an oxidizing gas to the initial reaction chamber, means for introducing, below the level of the surface of the melt in the reaction chamber, a melt stirring fluid medium, means for introducing carbonaceous material into the melt; a secondary refining chamber connecting with the initial reaction chamber at the surface level of the melt and through which the metal is arranged to pass from the initial reaction chamber; and a melt holding vessel into which the metal is passed from the secondary refining chamber.
Claims31
Apparatus for steelmaking comprising an initial reaction chamber for containing a steel melt arranged to receive source material in the form of scrap, pre-reduced iron or combinations of scrap and pre-reduced iron, an overhead lance for the introduction of an oxidising gas to the initial reaction chamber, means for introducing, below the level of the surface of the melt in the reaction chamber, a melt stirring fluid medium, means for introducing carbonaceous material into the melt;
- a secondary refining chamber connecting with the initial reaction chamber at the surface level of the melt and through which the metal is arranged to pass from the initial reaction chamber;
- and a melt holding vessel into which the metal is passed from the secondary refining chamber.
A method of steelmaking comprising subjecting source material in the form of scrap, pre-reduced iron or combinations of scrap and pre-reduced iron to melting and initial reaction in an initial chamber by the introduction from overhead of an oxidising gas, by the introduction below the level of the surface of the melt of a stirring fluid medium, and by the introduction of carbonaceous material;
- subjecting the melt to secondary refining in a secondary chamber connecting with the initial chamber at the surface level of the melt.
Dependencies are inferred from the claim text.