Control method in the annealing furnace

Abstract

The invention discloses an annealing furnace interior control method. The technical problem of slip accumulation between a furnace roller and strip steel in the prior art is solved. The annealing furnace comprises a first furnace section and a second furnace section. The method comprises the steps that whether a furnace roller slips in the first furnace section and the second furnace section or not is detected; when it is determined that the furnace roller slips in the first furnace section, the running speed of first strip steel is controlled to be reduced by a first amplitude value; the first reading step is executed, wherein the running speed of the first strip steel is read after a first duration; whether the speed difference value between the running speed of the first strip steel read in the first reading step between a first preset speed value is smaller than a first threshold value or not is judged, and a first judgment result is obtained; if not, the running speed of the first strip steel is controlled to be reduced by a first amplitude value, and the first reading step is executed again. The furnace roller slip accumulation effect is eliminated, and therefore strip breakage accidents caused by tension deviation are reduced.

Description

technical field [0001] The invention relates to the technical field of annealing technology, in particular to a control method in an annealing furnace. Background technique [0002] The prerequisite for the stable operation of the continuous annealing furnace section is the stability of the tension, so the appropriate tension is an important condition for the effective high-speed operation of the furnace and the prevention of strip deviation and hot scooping. The fluctuation of tension will not only affect the quality of the strip, especially When the production line produces thin materials below 0.45mm, tension alarms occur many times, and because the instability of the tension exceeds the time allowed by the system, it will cause shutdown. The belt will affect the shutdown of the unit for dozens of hours, seriously affecting the function and output of the unit. [0003] In the prior art, the control method of the tension in the furnace is to generate a given speed deviati...

AI Technical Summary

Problems solved by technology

[0004] Due to the large number of roller systems in the furnace, especially in the hot state, the micro-tension control is adopted, and a series of unstable states such as thermal expansion and contraction of the furnace rollers, deformation and surface friction are very easy to occur. When the slippage accumulates to a certain extent, it will lead to tension fluctuations. When the tension fluctuations reach a certain level, the strip will deviate and eventually cause the strip to break.

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