High casting speed continuous casting method of small billet directly rolled from long product

Abstract

A high casting speed continuous casting method of a small billet directly rolled from a long product belongs to the technical field of steelmaking and continuous casting. The specific steps and parameters of the method are as follows: the cross section size of the small billet involved in the method is 130mm*130mm-160mm*160mm, the basic circular arc radius range of a continuous casting machine is8-11m; the casting speed of the continuous casting machine is controlled; [P] less than or equal to 0.0250wt% in steel is controlled; the molten steel temperature and the superheat degree of a tundish, the cooling water flow of a crystallizer are controlled, and secondary cooling adopts automatic water distribution, and the like; and the temperature of a casting blank is controlled after the casting blank is cut so as to complete the method. The method has the advantages of meeting the requirement of a direct rolling process through temperature control of the casting blank, effectively reducing the production cost, and laying a foundation for the successful application of the long product direct rolling technology in industrial production.

Description

technical field [0001] The invention belongs to the technical field of steelmaking and continuous casting, and in particular relates to a billet high-speed continuous casting method for direct rolling of long products. Background technique [0002] At present, in the production process of wire and bar, the off-line cast slabs are generally stored and naturally cooled to room temperature. The temperature of the hot cast slabs to the steel rolling heating furnace is generally in the range of 500-600 °C, and the heating furnace needs to be reheated to 1040-1040 °C. It can be rolled at 1140°C. The defect of this production process is that: heating the high-temperature slab after cooling will easily cause a large amount of energy loss, and the heating process also consumes a lot of energy; the construction investment, daily maintenance, material consumption, gas consumption, etc. of the steel rolling heating furnace will also consume a lot of energy. huge economic investment. ...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a billet high-speed continuous casting method for direct rolling of long products, which solves the problem that the surface temperature of the billet in the current technology cannot meet the requirements of direct rolling, resulting in high production costs

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