Large round billet continuous casting foot-crossing roller type crystallizer electromagnetic stirrer and process

Abstract

The invention discloses a large round billet continuous casting foot-crossing roller type crystallizer electromagnetic stirrer and a process, and solves the problems of core quality, subcutaneous inclusion and bubbles of a continuous casting billet. According to the technical scheme, on the premise that the process quality requirement is met, an existing electromagnetic stirring electric control system, a control part and a cooling water system are utilized as much as possible, and a part of equipment is modified. The foot-crossing roller type crystallizer electromagnetic stirrer is adopted, and a crystallizer supporting frame is additionally arranged. An inner winding coil is newly arranged. A process for electromagnetic stirring of the crystallizer is adjusted. The large round billet continuous casting foot-crossing roller type electromagnetic stirrer has the advantages that after the large round billet continuous casting foot-crossing roller type electromagnetic stirrer and the stirring process thereof are adopted, the high alloy steel 42CrMo4 continuous casting billet with the specification section of phi 600 mm is produced, and flaw detection shows that the transverse wave and longitudinal wave flaw detection percent of pass reaches 100%. The high alloy steel continuous casting billet with the specification section of phi 800mm is produced, and macroscopic inspection shows that the core quality of the continuous casting billet is remarkably improved and the quality is stable.

Description

technical field [0001] The invention belongs to the technological field of steelmaking and continuous casting equipment, and relates to an electromagnetic stirrer and a technology for continuous casting of a large round billet across footed roller crystallizers. Background technique [0002] The electromagnetic stirring of the mold has the functions of uniform molten steel temperature, reducing the superheating of molten steel, promoting the floating of gas and inclusions, increasing equiaxed crystals, and promoting the adsorption of floating inclusions by mold slag. Since the mold copper tube, air gap, etc. have different attenuation effects on the electromagnetic force, it is known that almost all domestic bloom continuous casting has introduced the electromagnetic stirring technology of the magnetic field surrounding the mold tube, that is, the electromagnetic stirrer is smaller than the total length of the mold. When installed, it is completely placed in the copper tube ...

AI Technical Summary

Problems solved by technology

[0003] The invention discloses an electromagnetic stirrer and a process for a large round billet continuous casting cross-footed roller crystallizer, which solves the problems of core quality, subcutaneous inclusions and air bubbles of the continuous casting billet

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