Dynamic subsection control method of tinned product annealing temperature

Abstract

The invention relates to a dynamic subsection control method of a tinned product annealing temperature. The dynamic subsection control method is characterized by comprising the following steps: 1, setting and calculating the temperature of a first heating section of strip steel in a furnace; and 2, setting and calculating the temperature of the nth heating section of strip steel in the furnace, wherein n is greater than 1. According to the technical scheme, the dynamic subsection type control thinking can be applied to the existing continuous annealing automatic control system, the strip steeltemperature and the heating temperature in the furnace are set in a dynamic subsection manner in the length direction of strip steel, the high-efficiency numerical computation method is adopted to apply the genetic factor of control of each section to the feedforward control of the strip steel, and the power of a radiant tube is subjected to dynamic fine adjustment through the feedforward calculation result to adjust the surface temperature of strip steel, so that the temperature control of the strip steel is more precise.

Description

technical field [0001] The invention relates to a control method, in particular to a dynamic segmental control method for the annealing temperature of tin-plated products, and belongs to the technical field of continuous annealing automatic control. Background technique [0002] In the operation control of the continuous annealing unit, the temperature control of the strip is the most critical and the most complicated. The strip heating process is a complex working condition system with large inertia hysteresis and multiple variables. Conventional, fixed, A single control method cannot achieve the control goal at all. Therefore, advanced enterprises have introduced automatic annealing control systems, using computer simulation technology, through functions such as feedforward, feedback, and self-learning, to conduct multivariate analysis of the temperature of the strip steel in the annealing furnace, and finally Realize the smooth transition of strip temperature and the smoo...

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Problems solved by technology

[0003] In the current "one-stage" temperature control system, the "genetic factor" of strip temperature control can only be applied to the feedback control of the next strip of the same specification, but cannot be applied to the feedforward control of the same strip. Moreover, generally tin-plated products are relatively thin, with an average thickness of less than 0.25mm, and the length of each coil of strip steel is more than 10,000 meters. The heating time in the furnace is relatively long, and the "one-stage" temperature control is likely to cause "stringing" of the strip steel in the furnace. ", "hot ladle song" and other quality accidents caused by broken belts in the furnace, the existing technology has not solved this technical problem

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