CASTING DELIVERY NOZZLE

摘要

In a twin roll continuous caster, the casting nozzle in the continuous casting apparatus is arranged such that the outlet passages and/or tapered walls in the main portion within the casting nozzle provide flow of molten metal downwardly converging toward the nip between the casting rolls of a twin roll caster. The casting nozzle having a reservoir portion for directing molten metal converging toward the triple point region to inhibit the washing of shells forming on the casting surfaces of the casting rolls.

主权项

1. A method of continuously casting metal strip comprising:
(a) assembling a pair of casting rolls laterally disposed to form a nip between them and adapted to maintain a casting pool of molten metal supported by the casting rolls adjacent side dams, (b) assembling an elongated metal delivery nozzle extending along and above the nip, the delivery nozzle having:
at least one segment having a main portion, the main portion having one or more outlets adapted to deliver molten metal in the casting pool longitudinally along the metal delivery nozzle directed downwardly toward the nip; and,a restrictive baffle positioned above the outlets adapted to alter the velocity of the molten metal flowing through the main portion of the delivery nozzle and tapered sidewalls and/or passages below the baffle enabling molten metal to flow below the baffle to converge toward the nip, (c) introducing molten metal from a metal delivery system through the elongated metal delivery nozzle downwardly toward the nip forming a casting pool of molten metal supported on the casting rolls above the nip, and (d) counter-rotating the casting rolls so as to form shells on the casting surfaces of the casting rolls brought together at the nip to cast metal strip downwardly from the nip.