5.4　Metallurgical Length

5.4.1　The metallurgical length of caster shall be determined according to the length of liquid core.The length of liquid core calculated as per maximum casting speed is the metallurgical length of caster.The length of liquid core can be calculated as per following formula:

Of which:L—liquid core length of strand，m；

D—strand thickness，mm；

Vmax—maximum casting speed of strand，m/min.

K—solidification factor，is related to the steel grade and the cooling conditions of caster，preferably is 24mm·min-0.5-32mm·min-0.5.

5.4.2　The length of caster shall be determined by the maximum liquid core length required by the steel grade to be cast and the strand section.Normally，the caster length shall be 1.0-1.1 times of maximum liquid core length.The length of slab caster shall be finally determined with combination of roll array design.