A Slab Heating Furnace Discharging Furnace Door Opening Sequence Control Method

Abstract

A timing control method for material discharge furnace door opening of a slab reheating furnace. The method belongs to the field of control and includes the steps of: 1) determining a reasonable opening position of the material discharge furnace door and an included angle between a tapping arm moving to a preset lifting position and a horizontal roller table surface; and 2) on the basis of satisfying normal demands in a production process, establishing a timing control logic of an opening operation of the material discharge furnace door during an automatic tapping process, in a mode of firstly calculating the vertical distance from the tapping arm of a tapping machine to the furnace door at the most front edge of the material discharge furnace door when the tapping arm of the tapping machine moves to a preset lifting position and then determining a required lowest position for opening of the material discharge furnace door, thereby ensuring that the tapping arm of a tapping machine cannot be impacted by the material discharge furnace door. The method can protective safety of the devices and maximumly reduce the opening degree of the furnace door, so that heat loss is reduced and the time of completely opening the furnace door is reduced. The method can control heating atmosphere in the furnace and reduces the energy loss during the automatic tapping process of the furnace, and further can reduce production cost and energy consumption during operation of the devices.

Description

Technical field [0001] The invention belongs to the field of control, and is specifically a control or adjustment method in a metal heat treatment process, and in particular relates to a method for controlling the opening of the discharge furnace door of a slab heating furnace. Background technique [0002] The function of the tapping machine of the heating furnace in the rolling mill is to "pull out" the slab heated to a certain temperature in the heating furnace, put it on the center line of the roller table at the exit of the heating furnace, and send it to the rolling line. [0003] The "steel tapping" sequence control of the slab heating furnace generally follows the traditional sequence control mode, that is, after the heating furnace receives the "automatic tapping" command, the furnace door starts to rise, when the furnace door moves to the "half open" position ( The furnace door rises above the lower end wall of the discharge end to ensure that the tapping arm of the tappi...

AI Technical Summary

Problems solved by technology

[0005] However, the main problem of this technical solution in the implementation process is that after the tapping machine "advances" and runs to the target setting position, the furnace door begins to move from the "half-open" operating position to the "full open" position, and the tapping machine's tapping During the "lifting" of the steel arm in the furnace, the furnace door is always in the "fully open" state

[0006] Since the temperature at the discharge side of the slab heating furnace in the rolling mill exceeds 1100°C, the radiation heat loss is large, and the pressure difference inside and outside the furnace causes a rapid loss of heat in the furnace, and more gas needs to be burned to compensate for the heat loss. negative impact on energy saving

Therefore, in terms of saving energy loss, there is still a lot of room for improvement in the above technical solutions

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