Method for automatic jump steel reheating of walking beam of stepping type heating furnace

Abstract

The invention discloses a steel reheating method for a stepping type heating furnace. In the steel heating process, a walking beam is mainly in an operating state or idling state; when the walking beam is in the idling state, the walking beam starts automatic high-low lifting motion; and when the walking beam is in the operating state, the walking beam stops the automatic high-low lifting motion. By the high-low automatic jump steel heating of the walking beam at the quench time before steel tapping and the reasonable setting of the staying time of the walking beam on high and low positions, the serious water mark temperature difference caused by overlong time of a plate blank stayed on a fixed beam can be effectively eliminated, and the performance requirements on special products such as greatly improving the dimensional accuracy of products, enhancing the rolling stability of a finishing mill, greatly improving silicon steel and the like can be met.

Description

technical field [0001] The invention relates to the technical field of hot-rolled slab heating, in particular to a steel burning method for a walking heating furnace. Background technique [0002] At present, the walking beam of the walking heating furnace is mainly in two states during the steel burning process, one is in the operating state of steel loading, walking beam positive circulation, walking beam reverse circulation and steel tapping; the other is in the working state of The idle state of the low bit (lower limit bit). Because the slab is in contact with the fixed beam for a long time during the heating process, the temperature difference at the bottom of the slab will cause watermarks, resulting in uneven temperature of the slab, which will have the following effects on production and product quality: [0003] 1) The temperature of the slab is uneven, and rolling instability is prone to occur during the rolling process; [0004] 2) Affects the width and thickne...

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Problems solved by technology

[0006] The object of the present invention is to provide a steel burning method with automatic stepping on the moving beam of the walking heating furnace, which solves the problem of watermarks caused by the contact between the slab and the fixed beam for a long time during the heating process, so as to make the heating temperature of the slab uniform, Better provide conditions for improving product size control accuracy, improving rolling stability and improving product performance

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