Casting-rolling system for batch and continuous operation

A method for producing an ultra-thin strip of or less than 0.8 millimeter (mm) from cast steel in a batch mode or a continuous mode of operation with a casting-rolling system which includes at least one casting plant and at least seven final roll stands, the method comprising the steps of:

• casting a thin slab having a slab casting thickness of 90 mm to 150 mm and a casting width of at least 1200 mm at a casting speed of 7 m/min;
• heating and/or homogenizing the thin slab to a first temperature in a continuous furnace;
• and
• rolling the thin slab by the at least seven final roll stands, wherein the thin slab undergoes no inductive heating during production of the ultra-thin strip;
• wherein the step of rolling the thin slab includes:
• rough rolling the thin slab at the heated and/or homogenized first temperature by at least one roughing roll stand;
• heating and/or homogenizing the rough-rolled thin slab to a second temperature by a further continuous furnace, the first and second temperatures being greater than an austenite-to-ferrite transition temperature;
• and
• finally rolling the rough-rolled thin slab at the second temperature, to the ultra-thin strip with a thickness of or less than 0.8 mm by the at least seven final roll stands, which are arranged downstream of the further continuous furnace.