Crystallizer submersed nozzle of beam blank single-point nonequilibrium protective casting and using method

A crystallizer and immersion technology, which is applied in the direction of casting molten material container, casting equipment, metal processing equipment, etc., can solve the problems of slab solidification, many slab defects, and large impact depth, etc., and achieve the reduction of slab defects and reduce The effect of impact depth and improvement of work rate
CN109570482AActive Publication Date: 2019-04-05LAIWU STEEL YINSHAN SECTION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
LAIWU STEEL YINSHAN SECTION CO LTD
Publication Date
2019-04-05

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Abstract

The invention discloses a crystallizer submersed nozzle of beam blank single-point nonequilibrium protective casting and a using method and belongs to the technical field of beam blank continuous casting. The nozzle comprises an isometric section and a reducing section, wherein the cross section of the inner side of the isometric section is round, the isometric section and the reducing section areconnected to form a submersed nozzle body, the cross section of the inner side of a joint of the isometric section and the reducing section is round, the inner cross section of an free end of the reducing section is oval; and a through hole X, a through hole Y and a through hole Z are formed in the reducing section in the X direction, the Y direction and the Z direction. During the beam blank single-point nonequilibrium protective casting, flow speed of molten steel can be reduced, the impact depth of the molten steel in a crystallizer is reduced, a flow field and a temperature field are homogenized, the washout to a wall surface of the crystallizer is not caused, and casting blank condensation is not influenced, an obtained product is few in defects and high in quality, and the crystallizer submersed nozzle has the advantages of being simple in structure, convenience in using method and easy in implementation.
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Description

technical field

[0001] The invention relates to the technical field of continuous casting of shaped billets, more specifically, to a submerged nozzle of a crystallizer for single-point unbalanced protection casting of shaped billets and a use method thereof. Background technique

[0002] Continuous casting of steel is the process of continuously cooling molten steel with a certain degree of superheat through a water-cooled crystallizer into a solid casting billet with a certain shape. During this process, a casing made of refractory material is required to inject molten steel from the tundish. In the crystallizer, this refractory sleeve is called a submerged nozzle. The submerged nozzle is installed on the bottom plate of the tundish and inserted below the liquid surface of the mold. Its main function is to prevent secondary oxidation, nitriding, and splashing of molten steel, and at the same time avoid slag entrainment on the liquid surface, and adjust the flow pattern and ...

Claims

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