Continuous casting device and method of large-section round billet

Abstract

The invention discloses a continuous casting device and a continuous casting method of a large-section round billet. The device comprises an inner crystallizer, an outer crystallizer, an upper cover mechanism, a base mechanism, a cylindrical ingot guider with a solid round section, a tundish with a heating function and a cast flow distributor, wherein the base mechanism and the inner part of the upper cover mechanism are communicated with each other and fixed from top to bottom; the outer crystallizer is fixed below the base mechanism; the inner crystallizer is of an inverted arrow-shaped structure and is fixedly connected to the upper cover mechanism; the lower side of the inner crystallizer is inserted into the upper cover mechanism and the base mechanism, so that the lower part of the inner crystallizer is arranged at the inner side of the outer crystallizer and concentrically surrounded by the outer crystallizer; the cast flow distributor distributes metal solution in the tundish into one or more paths and guides the metal solution into the upper cover mechanism; the metal solution is filled between the inner crystallizer and the outer crystallizer; in the primary stage of casting, the cylindrical ingot guider is arranged at the bottom of a round cavity below the outer crystallizer; the metal solution is cooled by the inner crystallizer and the outer crystallizer to form a solidified round billet; and the round billet is arranged on the cylindrical ingot guider.

Description

technical field [0001] The invention relates to a continuous casting device and a casting method for a round billet with a large section. Background technique [0002] With the development of petroleum, chemical, wind power, nuclear power and other industries, the demand for large-diameter tubular billets, cylindrical billets, ring billets, and large-section high-quality solid ingot billets continues to increase, which cannot be met by traditional ingot forging punching and hole expansion technologies. The demand for quality, efficiency, and cost, along with the increase of casting section diameter, central looseness, shrinkage cavity, segregation deterioration, low yield (50-65%), and low production efficiency seriously restrict the development of this industry. [0003] In continuous casting technology, due to the influence of large cross-section heat transfer, the internal quality and production efficiency of the billet also decrease significantly with the increase of the...

AI Technical Summary

Problems solved by technology

[0002] With the development of petroleum, chemical industry, wind power, nuclear power and other industries, the demand for large-diameter tubular billets, cylindrical billets, ring billets, and large-section high-quality solid ingot billets continues to increase, which cannot be met by traditional ingot forging punching and hole expansion technologies. The demand for quality, efficiency, and cost, with the increase of casting section diameter, loose center, shrinkage cavity, segregation deterioration, low yield (50-65%), and low production efficiency seriously restrict the development of this industry

[0003] In continuous casting technology, due to the influence of large cross-section heat transfer, the internal quality and production efficiency of the billet also decrease significantly with the increase of the cross-section diameter. The transmission of deformation to the center becomes weaker and weaker, so that the solid continuous casting slab with a diameter of more than 1000mm has become an insurmountable forbidden zone for continuous casting

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