Uniform cooling crystallizer

Abstract

The invention discloses a uniform cooling crystallizer. A flow-guiding water jacket of the crystallizer is in contact with and is supported by four corners of a crystallizer copper tube. The flow-guiding water jacket is directly supported by the four corners of the crystallizer copper tube, so that the accuracy of a crystallizer water seam is greatly improved; meanwhile, the flow-guiding water jacket is in contact with the four corners of the crystallizer copper tube, so that cooling of the corners of the crystallizer copper tube is weakened and the cooling strength of the corners and the surface of the crystallizer copper tube are uniformized. The uniform cooling crystallizer is simple in structure and vivid in effect, achieves simultaneous solidification in the circumferential directionof the crystallizer when continuous casting molten steel is initially set, and reduces the tendencies of corner cracking and collapse of a casting blank.

Description

technical field [0001] The invention belongs to the field of steelmaking continuous casting, in particular to a uniform cooling crystallizer. Background technique [0002] In the continuous casting production of square, rectangular and plate-shaped slabs with polygonal cross-sections, after the molten steel is poured into the copper tube of the crystallizer, under the action of cooling water outside the copper tube, it crystallizes and solidifies along the inner wall of the mold, solidifies into a slab shell and occurs Shrinkage, the metal in the corner area of ​​the copper tube of the mold is cooled by the two tube walls, which is stronger than the cooling intensity of the surface, resulting in uneven metal temperature, billet shell thickness and shrinkage at the corner and face, increasing the corner cracks and square off of the billet Tendency, under this condition, increasing the cooling intensity will increase the angle cracking and square off tendency, and the actual p...

AI Technical Summary

Problems solved by technology

This solution directly solves the problem of uneven cooling between the corners of the mold copper tube and the surface, but the problem of uneven mold water gaps still exists

[0006] Chinese patent "01239386.X" discloses a scheme: use positioning bolts to fasten the water jacket and mold copper tube, and adjust the size of the water gap. This is the structure commonly used in billet continuous casting machine molds. In practice In production, it is difficult to adjust the water gap accurately with positioning bolts, and the error is large

[0007] Chinese patent "201120414075.6" discloses a solution: longitudinal reinforcing ribs are arranged on the inner wall of the crystallizer water jacket, and the size of the reinforcing ribs protruding from the inner cavity of the crystallizer water jacket is smaller than the size of the crystallizer water seam. Compared with the previous water jacket structure , improves the precision of the water joint, but because the height of the rib is smaller than the size of the mold water joint, the error of the water joint is still too large compared to the water joint width of 3-5mm

[0008] In the prior art, the solution to the uneven cooling of the corner and surface of the mold copper tube and the uneven cooling of the mold water gap are all solved separately; the Chinese patent "201520116800.X" discloses that the corner and edge of the mold copper tube are not cooled The cost of a uniform solution is relatively high; the technical solution disclosed in Chinese patent "201120414075.6" to solve the large water gap error of the crystallizer, the water gap error is still relatively large

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