In a slab casting process, a thin slab is cast in a form close to a final product and is cast to have smaller thickness, and a roughing rolling process can be omitted in hot rolling plants, and thus the thin slab process is mainly employed for omission and simplification.
Unlike a general continuous casting process, when such a thin slab continuous casting process is performed, a thin slab can be cast at a rapid rate, and also solidifying molten steel in a liquid phase into a thin slab is completely carried out in a mold and a strand, and thus fine crystalline grains can be obtained when compared to the typical slab.