Method for controlling cementation of casting roller on fan-shaped section of continuous casting machine

Abstract

The invention relates to a quality assurance technology for continuous casting machine equipment and a casting blank. Aggregates such as iron sheets falling from the surface of the blank, covering slag residues, secondary cooling water scales and the like are accumulated, and part of aggregates are remelted or sintered and cemented on the surface of a casting roller to form a hard cementing substance, so that the casting roller stops rotating. In order to eliminate influence on the normal operation of the equipment and solve the quality problem of the casting blank, the invention provides a method for reducing the cementing substance enriched on the surface of the roller, namely an aerial fog water spray device is arranged near an inner arc roller of a fan-shaped section in front of a bending section, a straightening section and a horizontal section of an arc continuous casting machine and sprays aerial fog cooling water onto the surface of the roller to form a water film, so that the temperature of the casting roller is reduced, and a lubricating effect is achieved between the continuous casting blank and the casting roller. The cleaning frequency of a segmental roller on the fan-shaped section can be effectively reduced, the segmental roller is overhauled once every 15 to 17 weeks instead of once every 8 to 10 weeks originally, and the operation service life of the fan-shaped section is effectively improved; and compared with an off-line overhaul mode, the overhaul mode has the advantages that: maintenance cost is reduced by over 30 percent, and the operation rate of the casting machine is improved by over 2 percent.

Description

technical field [0001] The invention relates to slab continuous casting machine equipment and casting slab quality assurance technology in the production process of iron and steel products, in particular to a method for reducing the occurrence rate of surface bonding of continuous casting rolls. Background technique [0002] During the slab continuous casting production process, the segmented rollers in the sector are generally used to support and pull the straightening slab. Since the continuous casting machine is mostly arc-shaped structure, during the production process, due to the accumulation of aggregates such as iron oxide scale, mold slag residue, and residual scale after the evaporation of the secondary cooling water on the surface of the casting slab, the arc rollers and the continuous casting slab form in the sector. In the "included angle area", such as figure 1 shown. Part of the aggregate is washed away by the secondary cooling water, and the other part of th...

AI Technical Summary

Problems solved by technology

However, due to the high temperature characteristics of the continuous casting process itself, this method alone cannot completely eliminate and greatly effectively reduce the occurrence of sticking

In fact, at present, steel mills have no other special solutions to this problem except for regular replacement of sector segments for off-line grinding.

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