CASTING CONTROL METHOD IN BILLET CONTINUOUS CASTING EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To obtain a control technique for distributing cast slabs suitably conforming to the product standard to obtain the min. quantity of the cast slabs having out of the product standard and the max. yield at the completing time of the casting, in a billet continuous caster having multi-strands. ;SOLUTION: In the multi-strand system billet continuous casting equipment, the decision of the whole casting length from the starting to the completing of the casting in each strand is executed as the following calculations. A definite casting length is calculated by accumulating the standard length of the products from the cutting completing position of the cast slab in each strand to the nearest time of the molten steel surface in a mold. Successively, the molten steel quantity in a tundish is distributed into each strand as the multiple numbers of the standard length of the product and calculated by adding to the definite casting length. The distribution into each strand is executed by adding the standard length of the product in order from the preceding strand at the point of calculating time until the remaining molten steel quantity in the tundish becomes zero. Then, in the case of stopping the casting at out of the schedule or at the completing time of the casting, the definite casting length and the distribution are recalculated.;COPYRIGHT: (C)2000,JPO