PRODUCTION OF HOT-ROLLED STEEL STRIP FROM CONTINUOUSLY CAST SLABS

摘要

1. Method for the production of hot-rolled steel strip from starting material continuously cast already in strip shape, in which method partial pieces (4a or 4b) of equal length are initially severed from the cast strand (4) rigidified after the casting, these partial pieces (4a, 4b) are then transferred one after the other with stretched length into a furnace (5) and stored in this as well as brought to and maintained at rolling temperature, in which method a greater number of cast strand partial pieces (4a and 4b) is preliminarily produced and stored until the beginning of rolling and individual cast strand partial pieces (4a and 4b) are introduced one after the other at rolling temperature into a rolling mill for rolling-down and in which method the continuous casting (1) is continuously continued also during the rolling operation as well as the cast strand partial pieces (4a and 4b) then formed introduced into the furnace for storage until rolling, characterised thereby, that the cast strand partial pieces (4a and 4b) severed from the cast strand (4) are exclusively introduced directly into the furnace (5) and stored therein subject to transverse transport (6), that the furnace (5) is in that case operated substantially without additional energy supply and the cast strand partial pieces (4a and 4b) are stored therein over a period which corresponds to a multiple of, for example four times their casting time, that the rolling of each individual cast strand partial piece (4a and 4b) is however carried out in a time unit which corresponds to only a fraction, for example one fifth of its casting time and that the rolling is carried out discontinuously and the rolling operation is in that case each time interrupted by an interval time over a period which corresponds to the difference between a casting time and a rolling time.