Control method to reduce the risk of bending material operation in the annealing furnace

Abstract

The invention provides a control method of reducing buckled material operation risk in an annealing furnace. The control method includes the following steps: (1) shut down and temperature reduction: when strip steel in the annealing furnace is found buckled, switching the annealing furnace into a temperature reduction mode and meanwhile shutting down the machine set in a sectionalized temperature reducing manner, when the machine set is shut down, releasing tension of each part in the machine set, powering-off fans in a quick-cooling section and a final-cooling section, powering-on a stabilizing roller and an air bellow in the quick-cooling section and a squeeze-drying roller in the final-cooling section, and relieving pressure of a buffer roller at inlet of the annealing furnace timely to ensure the strip steel at the inlet to be in a loosen status; (2) tension set: according to a tension formula, calculating the total tension of the process zones to obtain a total tension set value of the process zones; (3) operation of the machine set; and (4) abnormal situation treatment. The control method is high-effective and safe, is easy to carry out, is low in cost, and can reduce breaking risk of a buckled material in an in-furnace operation process effectively.

Description

[0001] Technical field: [0002] The invention relates to a control method for reducing the risk of bending material operation in an annealing furnace, and belongs to the technical field of annealing furnace control. [0003] Background technique: [0004] In the modern cold rolling continuous annealing unit, the annealing furnace is the main process section of the unit. During the production process, it is often affected by various reasons such as the environment, equipment and human operation, which leads to the buckling of the steel strip in the furnace and the strip steel in the furnace. The occurrence of warp generally includes: warp during operation, warp after quick stop, and warp after a large speed reduction of the unit. When the steel strip in the furnace is warped, if the production personnel adjust the production process unreasonably, the degree of warping of the steel strip in the furnace will show a tendency to expand, and in severe cases, the strip steel in the f...

AI Technical Summary

Problems solved by technology

When the strip steel in the furnace is warped, if the production personnel adjust the production process unreasonably, the degree of warping of the strip steel in the furnace will show a tendency to expand, and in serious cases, the strip steel in the furnace will break at the warped position production accidents, causing unnecessary economic losses to the production of enterprises

[0005] At present, in the production process of the cold rolling continuous annealing unit, the conventional treatment methods for the strip warp in the furnace mostly adopt the process adjustment method of cooling, speed reduction, and tension reduction, but the specific operation process is not clear enough. The factors involved in the operation process are relatively complicated. If there is no set of practical guidance methods during the operation process, there will inevitably be a great risk of broken belts during the operation of the curved material in the furnace. It is very important to control the risk of inner ladle bending material operation

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