CONTINUOUSLY CASTING STEEL STRIP

摘要

Thin cast strip (12) is produced in a twin roll caster by delivering molten steel between the rolls (22) to form a casting pool. The casting pool is confined between the rolls by a pair of side dams (35) adjacent the ends of the casting rolls (27). Molten steel is delivered downwardly to the nip through a metal delivery system (24) having a tundish (26) and core nozzles (27). The tundish (24), core nozzles (27) and side dams (35) are replaced by first preheating the refractory components to be replaced at a removed location, and transferred from the preheating position to the operating position by transfer device(s) (49, 51, 52, 53, 55, 56). The worn refractory component is removed and the preheated replacement refractory component replaced in the operating position rapidly to avoid thermal shock to the refractories that are not replaced. The replacement can be accomplished in less than 5 minutes or less than 2 minutes.