METHOD AND PLANT FOR THE ENERGY-EFFICIENT PRODUCTION OF HOT STEEL STRIP

摘要

The invention relates to a method for continuously or semi-continuously producing hot steel strip which, starting from a slab (3) guided through a slab-guiding device (6), is rolled in a preferably at least four-stand roughing train (4), the method comprising the following steps: casting of a slab (3) in a die (2), the slab (3) being reduced to a thickness of between 60 and 95 mm, preferably a thickness of between 70 and 85 mm, in the liquid core reduction process by means of the adjoining slab-guiding device, a slab support length (L) measured between the meniscus, i.e., the bath level, of the die and an end of the slab-guiding device (6) facing the roughing train (4) being between 12 m and 15.5 m, and a casting speed (vc) ranging from 3.8 to 7 m/min. As a result of a combination of the casting parameters according to the invention, it is ensured that the crater tip of the slab always extends to the vicinity of the end of the slab-guiding device (6) independently of the respective maximum casting speeds which are dependent on the particular grade of material.