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Rapid start method for vertical continuous annealing furnace

A continuous annealing furnace, vertical technology, applied in the direction of furnaces, heat treatment furnaces, furnace types, etc., can solve the problems affecting the production rhythm and unit capacity, long furnace start-up time, etc., to shorten the furnace start-up time, increase unit capacity, reduce The effect of mass loss

Active Publication Date: 2018-05-25
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for quick start-up of a vertical continuous annealing furnace, which solves the problem in the prior art that the vertical continuous annealing furnace takes a long time to start up after being shut down for maintenance, which affects the production rhythm and the production capacity of the unit

Method used

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Embodiment Construction

[0027] The present invention will be further illustrated below in conjunction with specific embodiments, and it should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0028] A method for quickly starting a vertical continuous annealing furnace, the method comprising:

[0029] After the vertical continuous annealing furnace is overhauled, confirm the starting conditions of the vertical continuous annealing furnace; purge the atmosphere in the vertical continuous annealing furnace with pure nitrogen; heat up the vertical continuous annealing furnace; The atmosphere in the annealing furnace is purged with hydrogen; the strip steel of the vertical continuous annealing furnace is controlled to start operation.

[0030] The steps for confirming the start-up conditions of the vertical continuous annealing furnace are as follows: confirm that the top cover and bo...

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Abstract

The invention relates to a rapid start method for a vertical continuous annealing furnace. By adoption of the rapid start method for the vertical continuous annealing furnace, the problem that in theprior art, after a vertical continuous annealing furnace is stopped to be maintained, the furnace start time is long, and consequentially, the production rhythm and productivity are affected is solved. The rapid start method for the vertical continuous annealing furnace comprises the steps that after the vertical continuous annealing furnace is maintained, start conditions of the vertical continuous annealing furnace are confirmed; pure-nitrogen purging is conducted on the inside atmosphere of the vertical continuous annealing furnace; the vertical continuous annealing furnace is heated; hydrogen-containing purging is conducted on the inside atmosphere of the vertical continuous annealing furnace; and strip steel of the vertical continuous annealing furnace is controlled to start to operate. The rapid start method for the vertical continuous annealing furnace is simple and easy to operate, and the production efficiency and productivity of the vertical continuous annealing furnace are effectively improved.

Description

technical field [0001] The invention relates to the technical field of a vertical continuous annealing furnace, in particular to a method for quickly starting a vertical continuous annealing furnace. Background technique [0002] The continuous annealing furnace is used to recrystallize and anneal the work-hardened strip steel after cold rolling, improve the microstructure, improve plasticity and stamping formability, and ensure that the surface is not oxidized. After continuous annealing combines several separate processes of bell annealing into one unit, the production cycle is shortened from the original 10 days to at most one hour, the production material preparation is greatly reduced, the production process is simplified, the management is convenient, and the productivity is greatly improved. [0003] The vertical continuous annealing furnace is mainly used for the annealing production of tin-plated raw plates. The vertical continuous annealing furnace consists of a pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/56
Inventor 刘洪包祥明徐烨明
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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