A method for controlling the temperature difference between the upper and lower surfaces of the finish rolling intermediate billet

Abstract

The invention discloses a method for controlling the temperature difference between the upper and lower surfaces of the finish-rolled intermediate slab. By establishing a feedforward control model and a feedback control model, the current heating control parameters of the edge heater are changed to improve the edge temperature of the finished hot-rolled strip steel, especially high-grade silicon steel. department quality. The invention improves the heating effect of the upper and lower surfaces of the edge of the hot-rolled intermediate billet by utilizing the existing equipment through the improvement of the heating method; when the temperature difference between the upper and lower surfaces of the edge of the strip billet is large, the given heating power of the upper and lower surfaces can be adjusted, and the heating effect can be adjusted to achieve The edge heating effect reduces the overall power output of the edge heater and saves power consumption; it has good general performance, high adaptability, and high reliability. It is suitable for other hot rolling and finishing rolling controlled by PLC logic program. Incoming billet edge heater.

Description

technical field [0001] The invention relates to the field of hot-rolling electrical technology, and more specifically refers to a method for controlling the temperature difference between the upper and lower surfaces of a finish-rolled intermediate slab. Background technique [0002] In the hot rolling process, the strip billet passes through the SP (large side rolling mill), R1, R2 roughing mills in turn, and then the final rolling is carried out by the finishing mill. The edge heater (EH) is installed in front of the finishing mill to heat the edge of the strip billet (especially the type of silicon steel), so that the temperature of the middle and edge of the strip billet can achieve better temperature uniformity. The heating control of the original 1580 edge heater is given according to empirical parameters. In the Japanese empirical parameters, the difference between the upper and lower surface temperatures of the edge of the strip and the temperature of the upper and l...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of poor heating effect of edge heaters in the prior art, underheating and overheating phenomena often appear on the upper and lower surfaces of the strip steel, the present invention provides a temperature difference control method for the upper and lower surfaces of the finish rolling intermediate slab. Method, by establishing a feedforward control model and a feedback control model, changing the current edge heater heating control parameters, and improving the edge quality of hot-rolled strip products (especially high-grade silicon steel)

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