A Method of Measuring Slab Pound Difference

Abstract

The invention discloses a method for measuring the weight difference of a slab, which specifically includes the following steps: (1) calculating the correction coefficient m by using the actual weight difference of weighing and the measurement data before the furnace, specifically: the formula of the weight difference of the slab is B=mK- 1, K=LB / L0B0, L-measured length, B-measured width, L0-theoretical length, B0-theoretical width; the value of m is calculated by the actual weight difference; (2) the slab measurement system program in front of the furnace Program the pound difference measurement formula B=mK‑1, automatically convert the length and width measurement data in front of the furnace into the pound difference; the measurement system sets the pound difference ≥‑0.5%, and automatically passes; the pound difference <‑0.5% slab check Automatically stop and hang down for processing; this method is simple and easy, mainly using the length and width measurement system in front of the furnace to directly convert the measurement data into the pound difference, and the slabs that exceed the pound difference will not be loaded into the furnace, and the control will be carried out in advance to reduce the occurrence of short lengths rate, improve production efficiency and contract fulfillment rate.

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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