The Method of Losing Electricity and Dissipating Tension in Large Vertical Annealing Furnace

Abstract

The invention discloses a large-scale vertical annealing furnace power loss and tension reduction method. A plurality of furnace rolls for tensioning strip steel during annealing are arranged in the annealing furnace, and the furnace rolls are divided into fixed rolls and movable moving rolls; When the power is on, the moving roller is controlled to maintain the tension position for tensioning the strip steel; after power failure, the moving roller is unlocked, so that the moving roller moves to the position where the strip steel is relaxed. direction to move. The power loss and tension elimination method of a large vertical annealing furnace of the present invention, by setting a moving roller, and loosening the moving roller after power failure, the moving roller is moved to the loosening position, so that the steel strip is relaxed, and the steel strip can be eliminated when the power is cut off. The tension of the steel belt in the furnace is compensated, which can avoid the transitional deformation and broken belt of the steel belt due to excessive tension when the power is cut off.

Description

technical field [0001] The invention relates to the field of iron and steel manufacturing, in particular to a method for losing power and reducing tension of a large vertical annealing furnace. Background technique [0002] During the strip steel production process, the strip steel continuous annealing line and galvanizing line must pass through the continuous annealing furnace. After the strip steel enters the furnace from the entrance, it continuously passes through furnace towers with various functions, and then exits from the exit. The temperature of the steel strip in the furnace is up to more than 800 degrees, and the length of the steel strip in the entire furnace reaches one thousand or even several thousand meters. Sometimes it is unavoidable to encounter unexpected power outages. Once the power is cut off, the furnace temperature and strip temperature will drop, resulting in cold shrinkage. The cold shrinkage benefit of such a long strip steel is very serious, and ...

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Problems solved by technology

[0003] However, because there are many rollers in the furnace and the steel strip is very long, this little bit of slack steel strip cannot satisfy the cold shrinkage of such a long steel strip in the furnace. In addition, the furnace roller cannot rotate when the power is off. The friction resistance is very large, and it cannot compensate the strip steel deep in the furnace.

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