Process and apparatus for the continuous casting of a slab
AssigneeSMS Siemag Aktiengesellschaft
InventorsChristian Klinkenberg, Christian Bilgen, Tilmann Böcher, Luc Neumann
Life of this patent
Estimating the term…
Abstract
The invention relates to a process for the continuous casting of a slab (1), in particular of steel, wherein the cast slab (1) is conveyed through a furnace (2) and the slab (1) is subjected to a descaling operation. To increase the quality of the slab by reducing scale, the invention provides for the slab surface to undergo reduction in at least one section (3) of the furnace (2) as a result of an atmosphere consisting of an inert gas and hydrogen (H2) or of pure hydrogen being maintained in said section (3) of the furnace (2). The invention further relates to an apparatus for the continuous casting of a slab.
Claims18
1-17. (canceled)
A method for continuous casting of a slab, comprising the steps of:
- conveying a cast slab through a furnace in a conveying direction;
- subjecting the slab to a descaling operation;
- subjecting a surface of the slab to a reduction in at least in one section of the furnace by maintaining in the section of the furnace an atmosphere which consists of an inert gas and hydrogen (H2) or of pure hydrogen (H2);
- and, subjecting the slab surface to oxidation in a section of the furnace in front of and/or behind, in the conveying direction, the at least one section of the furnace with reducing atmosphere.
An apparatus for continuously casting a slab, comprising:
- a furnace through which the slab can be conveyed;
- descaling means for descaling the slab surface, wherein the furnace has at least two sections;
- means provided in at least one of the sections of the furnace for maintaining a reducing atmosphere;
- and means provided in at least another of the sections of the furnace for maintaining an oxidizing atmosphere.
Dependencies are inferred from the claim text.