A method for optimal setting of heating curve of dual-dimensional walking heating furnace based on time and furnace length

Abstract

The invention discloses a time-and-furnace-length-based double-dimensional stepping type heating curve optimizing setting method of a heating furnace. According to the method, according to the heating technique requirement of a plurality of steel blank sequences inside the furnace and the steel blank state, the temperature set value inside the furnace is subjected to optimization of the two dimensions including the time and the furnace length; compared with traditional optimization of the single set value in the length direction of a heating furnace based on a single steel blank, the different heating requirements and the front-back rank of a plurality of to-be-heated steel blanks are considered, and the time sequence value of each furnace temperature set point is further optimized, namely, through dynamic optimization of the furnace temperature setting time sequence, accurate control over differentiation heating technique requirements of the front and back steel blanks is achieved, the furnace temperature dynamic adjusting ability of the heating furnace is sufficiently used, differentiation heating of the steel blanks is achieved, and the effects that the heating quality of the steel blanks is improved, energy consumption and the oxidation burning loss are lowered, and the service life of the heating furnace is prolonged are achieved.

Description

technical field [0001] The invention relates to the technical field of optimal control of heating furnaces in iron and steel production, in particular to a method for optimally setting the heating curve of a two-dimensional walking heating furnace based on time and furnace length. Background technique [0002] At present, with the intensification of market competition, the steel heating and rolling process has changed from the traditional large-scale production according to plan to the small-batch and multi-steel flexible production mode of small batches. The traditional heating furnace control mode based on the mass production mode cannot Adapt to flexible and changeable flexible manufacturing production requirements. [0003] The billet heating furnace is a production equipment used to heat the blooming billet or continuous casting billet to a certain temperature distribution for rolling by the roughing mill. The iron and steel industry is a large energy consumer, and the ...

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Problems solved by technology

[0021] In view of the fact that the existing method for optimizing the furnace temperature of the heating furnace in the iron and steel industry mostly adopts steady-state conditions for optimization, it fails to meet the rolling process requirements of billets of different specifications and uses, resulting in low heating quality of billets, energy consumption and oxidation burning. Due to defects such as large damage, a two-dimensional step-by-step heating curve optimization setting method based on time and furnace length is proposed. The billet state (billet specification, type, furnace charging temperature), and the simultaneous optimization of the furnace temperature setting value in two dimensions of time and furnace length, compared with the traditional single billet-based optimization of the single set value in the length direction of the heating furnace, The method proposed by the present invention takes into account the different heating requirements and the sequence of multiple steel billets to be heated, and optimizes the time series value of each furnace temperature set point, that is, through the dynamic optimization of the time series of furnace temperature settings, Realize the precise control required by the differential heating process of the front and rear billets, make full use of the furnace temperature dynamic adjustment capability of the heating furnace, realize the differential heating of the billet, improve the heating quality of the billet, reduce energy consumption, reduce oxidation burning loss, and extend the heating furnace The effect of longevity

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