Rod and wire billet heating furnace model control method and apparatus

Abstract

The invention relates to a rod and wire billet heating furnace model control method and an apparatus, which belongs to the metallurgy field. The control method is characterized in that PLC is used for zone control on furnace temperature of a heating furnace, the PLC comprises a steel loading PLC, a steel tapping PLC and a heating furnace combustion control PLC, a heating furnace is divided into a furnace tail segment, a preheating segment, a heating segment and an isothermal segment, the billet to be treated is passed through each segment of the heating furnace in order for being heated, three thermoelectric couples are respectively arranged on the heating furnace along the furnace width direction of each segment, the temperature of head part, intermediate part and tail part of the billet can be rapidly tracked and determined in a stable mode, furnace temperature control of each segment of the heating furnace can be realized, by combining a radiation pyrometer at a rough rolling inlet, the head and tail part temperature distribution of the billet can be accurately controlled, and the control precision of the temperature control along the billet length direction and the temperature distribution along the billet length direction enable real-time tracking and determination. The rod and wire billet heating furnace model control method and the apparatus have obvious effects for increasing the product quality, enhancing rolling stability, saving energy and reducing consumption, and can be widely used for the hot working or heat treatment field of the wire rod billet.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a processing or treatment method and device for wire billets. Background technique [0002] For the rod and wire rod production line, the heating control of the billet during the production process is very important, not only to ensure the target temperature and uniform heat of the furnace, but also to require the billet to be at the entrance of the rough rolling, with small temperature fluctuations throughout the length and uniform temperature at the head, middle and tail; In addition, the oxidation and decarburization of billets are closely related to the furnace time and furnace gas temperature of billets. Therefore, on the premise of satisfying the rhythm requirements of the rolling line, it is of great practical significance to optimally set the furnace gas temperature in each section and control the heating curve of the billet. [0003] The rod and wire heating furnac...

AI Technical Summary

Problems solved by technology

[0011] At present, most heating furnaces of rod and wire rod production lines do not have a model control system, and a few manufacturers’ products are equipped with foreign "black box" models. These models cannot track and calculate the temperature of the head, middle and tail of the billet, and cannot realize the model control of the temperature of the head and tail of the billet.

[0012] In addition, the existing conventional hot rolling heating furnace is the most suitable for heating the slab, and generally only considers the heating of the upper and lower surfaces of the slab, while the billet in the rod and wire heating furnace must consider the heating of four sides, and the slab heating furnace , due to the large number of slab length specifications, it is impossible to accurately control the head and tail temperature of the rod and wire slab

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