Method for measuring slab pound difference

Abstract

The invention discloses a method for measuring the slab pound difference. The method specifically comprises the following steps that firstly, by utilization of the practical weighing pound differenceand furnace front measuring data, the correction coefficient m is calculated, specifically, the slab pound difference formula is B=mK-1, K=LB / L0B0, L is the measuring length, B is the measuring width,L0 is the theoretical length, B0 is the theoretical width, and through the practical weighing pound difference, the m value is calculated; and secondly, the pound difference measuring formula B=mK-1is compiled into a furnace front slab measuring system program, the furnace front measured length and measured width data are automatically converted into the pound difference, the system set pound difference is measured to be larger than or equal to -0.5%, passing is automatic, when the pound difference is smaller than -0.5%, slab checking is automatically stopped, and downward hanging treatmentis conducted. The method is simple and easy to conduct, a furnace front length measuring and width measuring system is mainly utilized, measured data are directly converted into the pound difference,pound difference overproof slabs are not charged, management and control are conducted in advance, the off-size occurrence rate is reduced, and the production efficiency and the contract demand rate are improved.

Description

technical field [0001] The invention relates to a measuring method, in particular to a method for measuring the pound difference of a slab. Background technique [0002] The weight of the slab directly affects the size of the rolled steel plate. At present, the rolling mill mainly constrains the weight of the slab through the pound difference. The pound difference is defined as B=(W-W0) / W0*100%, where W-the actual weight of the slab, W0-slab Billet theoretical weight. W=ρHLB, where ρ-density, H-slab thickness, L-slab length, B-slab width. The No. 3 continuous casting machine slab is used for the wide slab. The shape of the slab is irregular, and it is in the shape of an inverted trapezoid. A weighing device is added in front of the furnace, the operation is cumbersome, and the production efficiency of piece by piece measurement is low. In actual production, the billet weight varies widely, and the measurement accuracy is not high. Contents of the invention [0003] The...

AI Technical Summary

Problems solved by technology

The wide slab uses the No. 3 continuous casting machine slab. The shape of the slab is irregular, and it is in the shape of an inverted trapezoid. The corners of the crystallizer with large chamfers are not standardized, and the thickness is not easy to measure. It is difficult to calculate the pound difference through theoretical calculations.

A weighing device is added in front of the furnace, the operation is cumbersome, and the production efficiency is low for piece by piece measurement

In actual production, the billet weight varies widely, and the measurement accuracy is not high

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