Application method of furnace roll heating mode

Abstract

Disclosed is an application method of a furnace roll heating mode. The application method comprises the steps that whether a continuous vertical annealing furnace meets the first condition and the second condition at the same time or not is judged, wherein the first condition means that the current furnace region speed is larger than or equal to 30m / min, and the second condition means that the heating-up period ends; if the continuous vertical annealing furnace meets the first condition and the second condition at the same time, the state of the continuous vertical annealing furnace is controlled to enter the furnace roll heating mode from the heating-up period; and in the furnace roll heating mode, the heating section plate temperature of strip steel is limited, the quick cooling section plate temperature of the strip steel is limited, and then the horizontal temperature differences and the longitudinal temperature differences of the heating section and the quick cooling section of the strip steel are limited. The problem that the strip steel deviates and buckles in the furnace in the furnace starting process is effectively solved, and the annealing capacity and the stable plate passing capacity of a hot galvanizing production line are improved.

Description

technical field [0001] The present application relates to the technical field of steel rolling, in particular to an application method of a hot roll mode. Avoid abnormal conditions such as buckling and deviation of the strip during hot rolling, and improve the stable pass-through ability of the annealing and hot-dip galvanizing production line. Background technique [0002] The start-up sequence is to adjust the temperature and atmosphere of each area in the annealing furnace to the conditions suitable for the production of strip steel. [0003] The traditional start-up sequence is divided into: cold purge mode (cold purge), heating mode (heating up), production mode (production mode). [0004] However, since the temperature difference of the roll temperature gradually increases during the temperature rise process, the compressive stress generated by the final temperature difference may act on the strip, resulting in buckling deformation of the strip. With the relative move...

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Problems solved by technology

[0004] However, since the temperature difference of the roll temperature gradually increases during the temperature rise process, the compressive stress generated by the final temperature difference may act on the strip, resulting in buckling deformation of the strip. With the relative movement of the furnace roll and the strip, the strip will There are abnormal conditions such as buckling and deviation

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