A temperature control method in a heating furnace that quickly and automatically adapts to the rhythm of the rolling mill

Abstract

The invention relates to the technical field of control of heating furnace steel rolling, and discloses a heating furnace temperature control method capable of quickly and automatically adapting to the speed of a rolling mill. The heating furnace temperature control method comprises the steps as follows: (1) counting the relationship of production pace, steel output temperature and the temperature of each heating hearth section; (2) according to the rough regulation range of the given temperature of the each heating hearth section, subdividing the temperature regulation range by using the relationship between the production speed and the steel output temperature in the step (1); (3) according to the relationship in the step (1), counting the relationship between the each heating hearth section and the steel output temperature for unit time; (4) according to the relationship in the step (3), compensating the temperature of the each hearth furnace section according to the production cadence; (5) according to the steel output temperature, compensating the temperature of the each heating hearth section; (6) using the sum of the temperature compensation of the each heating hearth section and the basic control temperature of the each heating hearth section in the steps (4) and (5) as the input of a temperature controller within a temperate regulation range subdivided in the step (2), as a result, accurate and stable control of the temperature of the each heating hearth section is realized.

Description

technical field [0001] The invention relates to the technical field of steel rolling control in a heating furnace. More specifically, the invention is a temperature control method in a heating furnace that quickly and automatically adapts to the rhythm of a rolling mill. Background technique [0002] Heating furnace is a common equipment in iron and steel metallurgy. It is one of the key equipment in the steel rolling production line, and it is also the main energy-consuming equipment. It has nonlinear, time-varying, and distributed parameter characteristics. The quality of billet heating directly affects the quality, output, energy consumption and life of the rolling mill, and the setting of the furnace temperature directly affects the quality of the heated billet. The traditional control method of the heating furnace is to control the furnace temperature, which is automatically adjusted by the actuator, and is equipped with auxiliary control methods such as air-fuel ratio...

AI Technical Summary

Problems solved by technology

However, the current production site is basically a simplified one-dimensional model. The multi-dimensional model cannot be applied online because of the huge amount of calculation, which reduces the accuracy of the model to a certain extent.

[0004] In summary, the accuracy of the results obtained by predicting the billet temperature and the regression algorithm is poor, and the amount of calculation is large, so it is difficult to popularize and apply in actual production

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