Intensive cooling control device and control method of microalloyed steel continuous casting slab corners in vertical bending segment

Abstract

The present invention provides an intensive cooling control device and control method of microalloyed steel continuous casting slab corners in a vertical bending segment. The intensive cooling control device of the microalloyed steel continuous casting slab corners in the vertical bending segment comprises two sets of spraying racks installed at two sides of a continuous casting plate vertical bending segment, and is characterized in that each set of spraying racks comprise two spraying racks which are connected by connecting rods, each connecting rod is connected with a spraying rack horizontal driving device, a set of spraying pipes are installed on each spraying rack, the spraying pipes are connected with a water supply pipeline via an electromagnetic valve, and the electromagnetic valve and the horizontal driving devices are connected with a continuous casting machine control system. Intensive cooling of corners of continuous casting slabs of different microalloyed steel types and corresponding section dimensions thereof in the continuous casting machine vertical bending segment can be achieved, microalloy element carbonitride can be effectively suppressed for being precipitated from the casting blank structure grain boundary, and anti-crack capability of the casting blank is improved.

Description

Technical field: [0001] The invention relates to a forced cooling control device and control method for the corner vertical bending section of a micro-alloy steel continuous casting slab, and belongs to the field of control technology in the field of steelmaking-continuous casting. Background technique: [0002] Microalloyed steel has become one of the main products produced by domestic and foreign iron and steel enterprises. However, in the actual production process of micro-alloy steel, micro-transverse crack defects frequently occur at the corners of continuous casting slabs, resulting in serious surface quality defects in subsequent rolled products, which have brought huge economic losses to the enterprise, and have become constraints. Common technical problems that need to be solved urgently for high-quality and efficient production of micro-alloyed steel. [0003] The main reason for the frequent occurrence of corner transverse cracks in microalloyed steel continuou...

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Problems solved by technology

This method is similar to the idea of ​​the above-mentioned patent. It also adopts the method of increasing the water volume of the continuous casting slab as a whole to realize the strong cooling of the corner of the slab, which will also cause changes in the pressing process of the solidification end of the slab.

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