Thin-strip continuous casting machine pulling speed and casting strip thickness control method and device

Abstract

The invention discloses a thin-strip continuous casting machine pulling speed and casting strip thickness control method and device, and relates to the technical field of metallurgy. The method comprises the steps that according to the steady-state production line steel passing amount, the thickness of an original blank shell in a molten pool is reversely calculated; a solidification coefficient of a current casting roller is calculated according to the thickness of an original blank shell; the current target pulling speed is determined according to the solidification coefficient and the target casting strip thickness; a flow coefficient of a current flow distribution bag is calculated according to the steady-state production line actual steel passing amount; the adjustment amplitude of the liquid level in the flow distribution bag is determined according to the flow coefficient of the current flow distribution bag and the target casting speed; a PID controller for the liquid level ofthe flow distribution bag is designed, and the purpose of accurately controlling the liquid level in the flow distribution bag is achieved by controlling the position of a tundish stopper rod; a casting roller pulling speed PID controller is designed, and the purpose of accurately controlling the casting roller pulling speed by controlling the liquid level in a flow distribution bag and combininga molten pool liquid level control link is achieved; and a casting strip thickness PID controller is designed, and the purpose of accurately controlling the thickness of a casting strip of a product is achieved by controlling the casting roller pulling speed.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method, device, computer equipment and computer storage medium for controlling the pulling speed of a thin strip continuous casting machine and the thickness of the casting strip. Background technique [0002] Compared with conventional continuous casting, thin strip continuous casting eliminates the need for multiple processes such as ingot heating, billeting and multi-pass rolling, saving a lot of labor costs and energy costs; saving the process of ingot milling, reducing It has the advantages of cutting head and tail after hot rolling, improving the yield of finished products; small footprint, simple and centralized equipment, and small initial investment; unique sub-rapid solidification characteristics, special microstructure, and superior performance; the thickness of the obtained cast strip is close to the final product Thickness has obvious advantages for the producti...

AI Technical Summary

Problems solved by technology

[0005] In the existing technology, it is proposed to change the rolling force to control the strip thickness through the action of the roll gap. This method has a small influence on the strip thickness; there is a process window for the rolling force of the thin strip continuous casting casting roll. Once the rolling force is adjusted out of the A suitable process window will cause quality defects such as cracks or shrinkage cavities in the casting belt, resulting in unqualified product quality; frequent movement of casting rolls will affect the service life of the side seal plate, and excessive movement range can even directly cause the side seal plate to break , leading to production accidents

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