Electromagnetic stirring control method and system for continuous casting

Abstract

The invention provides an electromagnetic stirring control method and system for continuous casting. The method comprises the steps that a temperature field calculation model is built; the casting blank shell solidification rate is tracked through the temperature field calculation model; a stirring position is determined according to the casting blank shell solidification rate, wherein the position where the casting blank shell solidification rate is 45%-70% is determined as the stirring position; an electromagnetic stirring device is moved to the stirring position to apply an electromagnetic field to a casting blank. The system comprises an inputting unit, a model building unit, a tracing unit, a determining unit and a moving device; the inputting unit is used for inputting a technological parameter of continuous casting production, the model building unit is used for building the temperature field calculation model, the tracing unit is used for tracing the casting blank shell solidification rate according to the input technological parameter and the temperature field calculation model, the determining unit is used for determining the position where the casting blank shell solidification rate is 45%-70% as the stirring position, and the moving device is used for moving the electromagnetic stirring device to the stirring position. According to the electromagnetic stirring control method and system for continuous casting, a temperature field, the stirring device and the moving device are combined, electromagnetic stirring on the casting block at the best stirring position is achieved, and the internal quality of the casting blank is improved.

Description

Technical field [0001] The invention relates to the field of continuous casting, and more specifically, to an electromagnetic stirring control method and system for continuous casting. Background technique [0002] In the continuous casting process, such as figure 1 As shown, the molten steel from the ladle 1 and the tundish 2 passes through the mold 3 to cool and crystallize once to form a casting slab 100 with molten steel at the solidification center of the shell and is pulled out from the lower mouth of the mold 3 to form a molten steel surface 30 in the mold 3 (Meniscus). After the casting slab 100 is drawn from the lower mouth of the mold, it is cooled twice in the secondary cooling zone, after being straightened by the stretch-straightening roller train (note that only a part of the stretch-straightening rollers are shown in the figure), it passes through the cutting roller table Reach the torch cutting machine 4 for casting billet cutting, where the second cold zone refe...

AI Technical Summary

Problems solved by technology

[0006] However, the position of the electromagnetic stirring device disclosed in this patent is still fixed. In terms of improving the internal quality of the slab, this method has the following disadvantages:

[0007] First, high electromagnetic intensity does not necessarily improve the internal quality of the slab, because excessive stirring intensity can easily lead to the white and bright band structure of the slab and affect the performance of the rolled material;

[0008] Second, if the steel types are different, if the liquidus line difference is too large, or the casting speed changes greatly, on the premise of ensuring the quality of the slab, only by adjusting the amount of secondary cooling water, the surface temperature of the slab at the place where the electromagnetic stirring is installed cannot be satisfied. Require;

[0009] Third, in the continuous casting production process, the amount of secondary cooling water for some steel types cannot be adjusted at will, and the method disclosed in this patent cannot be implemented

Images