Device and method for improving casting blank quality of continuous casting production

Abstract

The invention discloses a device and method for improving casting blank quality of continuous casting production. The device comprises a plurality of casting-rolling mill racks arranged in the casting strand direction, an electromagnetic linear period symmetric stirring unit and a drive adjustment type secondary cooling water control unit. The casting-rolling mill racks are used for artificially and forcibly forming solidification tail ends and arranged on a casting strand horizontal area. The electromagnetic linear period symmetric stirring unit is arranged on a casting strand arc area. The drive adjustment type secondary cooling water control unit is used for conducting stepless water spraying cooling on the surfaces of casting blanks based on real-time measuring. The liquid core large-rolling-reduction casting-rolling device and technology used for artificially and forcibly forming the solidification tail ends form the large rolling reduction in the thickness direction of the casting blanks, so that the solidification tail ends are artificially and forcibly formed inside the casting blanks, conditions for forming defects in the natural solidification process of the casting blanks are terminated, flowing of solute element molten steel enriched in the casting blanks is prevented, and the effects of homogenizing and density inside the casting blanks are improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical process control, and relates to a device and a method for improving the quality of cast slabs produced by continuous casting. Background technique [0002] In the continuous casting production process, the high-temperature liquid steel is continuously cooled through the primary cooling zone, vertical zone, bending zone, arc zone, straightening zone, horizontal zone, etc. of the mold to form a billet with a liquid core of a certain thickness, and finally completely solidified . The solidification process conditions of the continuous casting slab are the main factors determining the quality of the slab. How to improve the quality of the slab has been an important subject of unremitting technical research in the metallurgical field for many years. In recent years, as offshore platforms, heavy machinery, nuclear power military and other engineering projects have higher and higher requirements o...

AI Technical Summary

Problems solved by technology

However, quality defects such as surface transverse cracks, surface longitudinal cracks, center cracks, center segregation, and center porosity of continuous casting slabs have not been well resolved.

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