Reinforced compact fan-shaped section under heavy pressure of continuous-cast solidification tail end

Abstract

The invention provides a reinforced compact fan-shaped section under heavy pressure of a continuous-cast solidification tail end, and belongs to the field of continuous casting production. The reinforced compact fan-shaped section comprises an inner frame and outer frame oppositely arranged up and down; four clamping cylinders respectively penetrate through four corners of the inner frame and the outer frame; a gap between the inner frame and the outer frame is kept at a set value; an inner arc roller row is connected to the inner frame; an outer arc roller row is connected to the outer frame; the inner arc roller row includes at least more than five upper support rollers; the outer arc roller row includes at least five lower support rollers; the upper support rollers and the lower support rollers adopt sectioned roller structures; at least one of the upper support rollers and the lower support rollers is a driving roller, and the others are driven rollers; one end of the driving roller is connected with a driving motor; and a pressing cylinder is connected with the driving roller in the upper support rollers. The fan-shaped section can prominently increase the pressing quantity of the continuous-cast solidification tail end to prevent the bounce deformation of a cast blank, meanwhile, guarantees synchronous shrinkage of the center part and a blank shell in the internal and external soaking temperature of the cast blank, prevents looseness, and improves the pressing capacity of the solidification tail end.

Description

technical field [0001] The invention belongs to the field of continuous casting production, and in particular relates to a reinforced compact segment for continuous casting solidification end under heavy pressure. Background technique [0002] The soft reduction technology at the end of solidification is an effective means to improve the segregation and porosity of the slab center, and has become a common equipment technology for new continuous casting machines. The light reduction at the solidification end of the bloom is mainly completed by the tension leveler in the air-cooling zone. The reduction of a single roll under the light reduction generally does not exceed 5mm, and the total reduction generally does not exceed 15mm. [0003] However, with the increase of the cross-section of the slab, the penetration efficiency of the reduction to the core of the slab is significantly reduced, and the reduction of the conventional light reduction cannot fully compensate for the s...

AI Technical Summary

Problems solved by technology

On the other hand, the single-roll reduction cannot control the rebound deformation of the slab after reduction, and due to the existence of the temperature gradient inside and outside the slab, the thermal shrinkage rate of the core of the slab is significantly higher than that of the slab during the gradual cooling process of the slab. surface, so the core of the slab will continue to produce porosity

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