Online thermal width adjustment method suitable for crystallizer

Abstract

The invention provides an online thermal width adjustment method suitable for a crystallizer, which comprises a judgment step, a short-distance width adjustment step and a long-distance width adjustment step. In view of the problems of long width adjustment time and high bleed-out risk in the prior art, a method of reasonably selecting a model curve according to the width change amount before andafter width adjustment can quickly complete the width adjustment and cone adjustment process online at one time, and has the advantages of quickness, high efficiency, reasonable taper change and effective reduction of the bleed-out risk.

Description

technical field [0001] The invention relates to the field of crystallizer width adjustment control methods, in particular to an online thermal width adjustment method suitable for crystallizers. Background technique [0002] The crystallizer of the slab continuous casting machine is wide at the top and narrow at the bottom. It is a trapezoidal funnel composed of two wide-side copper plates and two narrow-side copper plates. The distance between the two wide-side copper plates is generally fixed, while the narrow-side copper plates The distance between them is variable, and there is a taper between the two narrow-side copper plates. A cooling water tank is installed on the back of the copper plate. Four push rods are connected, and the two narrow-side water tanks are equipped with a mechanically driven crystallizer width adjustment device. The mechanical width adjustment device is driven by a motor to rotate the screw rod, and the nut on the screw rod is fixed in the push rod...

AI Technical Summary

Problems solved by technology

[0007] However, there are some deficiencies in the above-mentioned existing technologies: the former needs to perform multiple taper transformations to complete a taper adjustment, and once the width before and after the width adjustment changes too much (one side is greater than 100mm), it needs to be repeated several times. In the width adjustment process (A, B, C, D, H, G, F, E), on the one hand, it takes a long time to adjust the width, and on the other hand, there are multiple time points in the width adjustment process where the taper is 0. There is a greater risk of steel breakout in width adjustment; the latter is limited by the limitation of the radian value of a, so that the movement of the narrow side is limited. If the width adjustment amount becomes larger, the radian a at this time cannot meet the target width after one change. At the same time, if the angle a is too large, on the one hand, there is a restriction on the maximum mechanical taper, so that the value of a cannot be too large; on the other hand, if the value of a is not selected properly, the taper of the narrow-side copper plate will increase and cause the risk of steel breakout

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