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The Method of Shutdown and Tension Reduction of Large Strip Steel Continuous Annealing Furnace

A continuous annealing furnace and strip steel technology, applied in the field of steel manufacturing, can solve the problems of high friction resistance of strip steel on the surface of furnace rolls, inability to compensate for strip steel, etc., and achieve the effect of avoiding belt breakage accidents.

Active Publication Date: 2021-10-22
CHONGQING CISDI THERMAL & ENVIRONMENTAL ENG CO LTD +1
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Problems solved by technology

However, because there are many rollers in the large-scale continuous annealing furnace for strip steel, and the strip steel is very long, this little loose strip steel cannot meet the cold shrinkage of such a long strip steel in the furnace at all, and the furnace rollers cannot rotate in the parking state, and the belt steel The friction resistance of the steel on the furnace roll surface is very large, and it cannot compensate for the strip steel deep in the furnace.

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  • The Method of Shutdown and Tension Reduction of Large Strip Steel Continuous Annealing Furnace
  • The Method of Shutdown and Tension Reduction of Large Strip Steel Continuous Annealing Furnace
  • The Method of Shutdown and Tension Reduction of Large Strip Steel Continuous Annealing Furnace

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[0054] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0055] The present invention relates to a method for stopping and reducing the tension of a large-scale continuous annealing furnace for strip steel. During the shutdown process, the steel strips in the furnace are all in a sagging state by controlling the final stop rotation sequence and direction of each furnace roll.

[0056] In a large-scale continuous annealing furnace for steel strips, the length of the steel strip reaches one thousand meters or even thousands of meters. The method for stopping and reducing the tension of the present invention makes the steel strips in the furnace in a loose state by controlling the order and direction of each furnace roller's final stop rotation. In the vertical state, it can ...

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Abstract

The invention discloses a method for stopping and reducing the tension of a large-scale continuous annealing furnace for strip steel. By controlling the order and direction of each furnace roller's final stop rotation, the steel strip in the furnace is in a sagging state. When the temperature of the annealing furnace returns to room temperature , the steel belt is not easy to be tensioned due to cold shrinkage or the tension degree can be reduced, which is beneficial to avoid the occurrence of broken belt accidents caused by parking.

Description

technical field [0001] The invention relates to the field of iron and steel manufacturing, in particular to a method for stopping and reducing the tension of a large continuous annealing furnace for strip steel. Background technique [0002] In the continuous annealing furnace used in the strip continuous annealing line and galvanizing line, the strip steel is in a state of tension. After the strip steel enters the furnace from the entrance, it passes through furnace towers with various functions continuously, and then comes out 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. After the planned shutdown, the temperature of the furnace and strip steel will drop, causing cold shrinkage problems. The cold shrinkage benefit of such a long strip steel is very serious, and will generate a large tensile stress, which will caus...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/56C21D1/26C21D11/00
CPCC21D9/564C21D1/26C21D11/00C21D9/563
Inventor 许秀飞董斌雍海泉德军程淑明郭英
Owner CHONGQING CISDI THERMAL & ENVIRONMENTAL ENG CO LTD
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