Steel-making continuous casting intrusive flow nozzle and numerical simulation method thereof

Abstract

The invention discloses a steel-making continuous casting intrusive flow nozzle which includes a flow nozzle body. The flow nozzle body is cylindrical and is internally provided with a cylindrical inner chamber, the open end of the cylindrical inner chamber is a flow nozzle inlet, the closed end of the cylindrical inner chamber is a flow nozzle bottom, the side wall of the flow nozzle bottom is provided with a flow nozzle outlet, and the ratio of the height of the flow nozzle outlet on the side wall of the flow nozzle body and the width of the flow nozzle outlet on the side wall of the flow nozzle body is smaller than 1. A numerical simulation method for the intrusive flow nozzle is also disclosed. First the prototype-based intrusive flow nozzle and a model of a crystallizer are established using simulation platform numerical simulation software ANSYS, and flow field numerical simulation is performed; a geometric design of the intrusive flow nozzle is changed on the basis of the prototype numerical simulation, and the modified intrusive flow nozzle is subjected to numerical simulation; finally a molten steel backflow region of the flow nozzle outlet, crystallizer liquid level fluctuation and crystallizer narrow face molten steel flow velocity and other numerical simulation results are finally analyzed, and data supporting is provided for design development of the flow nozzle.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to an intrusive nozzle for steelmaking and continuous casting and a numerical simulation method thereof. Background technique [0002] Continuous steel casting is a process of continuously casting high-temperature molten steel into one or more forced water-cooled metal cavities (molds); after solidification and forming, it is cooled twice to form a certain shape (specification) billet; The continuous casting submerged nozzle is the key equipment to control the continuous casting process and state. [0003] The company's slab continuous casting machine is mainly used for the production of plates such as automobiles and home appliances, and most of them are low-carbon aluminum-killed steel. Low-carbon aluminum-killed steel is prone to the problem of water accumulation in the submerged nozzle caused by the deposition of Al2O3 in the casting process; at pr...

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Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a steelmaking continuous casting intrusive nozzle that can improve or prevent the problem of nozzle flow storage in the casting process of low-carbon aluminum-killed steel types. The invention also provides A numerical simulation method used in the design of the intrusive nozzle for steelmaking and continuous casting was developed to solve the problems of high cost of nozzle design and development, low efficiency, long development cycle, and difficulty in continuous improvement existing in traditional technologies

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