Slab caster online fan-shaped section roll gap suspension calibration method

The invention provides a slab caster online fan-shaped section roll gap suspension calibration method. The slab caster online fan-shaped section roll gap suspension calibration method comprises the following steps that step A, a gap value S of each opening of a slab caster fan-shaped section is measured in an offline mode, and the unit of the gap value S is mm; step B, a roll gap value R when arccenters of an inner arc and an outer arc coincide during casting machine theoretical designing is obtained, the unit is mm, the gap value S of each opening of the fan-shaped section is subtracted fromthe roll gap value R to obtain a comparison value L corresponding to each opening of the fan-shaped section, the unit is mm, and L=R-S; and step C, the fan-shaped section subjected to gap value S measurement is put on line, and a roll gap of the fan-shaped section on line without adding a standard cushion block is calibrated. The working efficiency of the method is 67%-75% higher than the workingefficiency of an original