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Submersed nozzle for plate blank electromagnetic rotational flow continuous casting

An immersion, electromagnetic technology, applied in casting equipment, casting melt containers, manufacturing tools, etc., can solve problems such as adverse effects, and achieve the effects of preventing involvement, suppressing negative pressure, and reducing liquid level fluctuations

Active Publication Date: 2015-02-25
苑轶
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the negative influence of the swirling flow in the nozzle on the flow in the crystallizer, continuously optimize the structure of the submerged nozzle, and provide a submerged nozzle for slab electromagnetic swirl continuous casting, which can cooperate with the nozzle in the nozzle. The use of swirl flow can not only give full play to the effect of swirl continuous casting, but also reduce the impact of the outlet flow caused by swirl on the wide surface of the mold

Method used

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  • Submersed nozzle for plate blank electromagnetic rotational flow continuous casting
  • Submersed nozzle for plate blank electromagnetic rotational flow continuous casting
  • Submersed nozzle for plate blank electromagnetic rotational flow continuous casting

Examples

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Effect test

Embodiment 1

[0034] A submerged nozzle for slab electromagnetic swirl continuous casting, with a length of 700mm, an inner diameter of 50mm, and an outer diameter of 90mm. The cross-sectional shape of the hollow inner cavity 2 is flat with front and rear planes and left and right arc surfaces, and the hollow inner cavity is straight. , the depth of the slag line 4 is 10mm, the height of the slag line 4 is 100mm, the distance between the lower end of the slag line 4 and the lower surface of the nozzle bottom 5 is 100mm, and the inner curved surface 6 of the upper edge of the molten steel discharge hole on both sides is clamped by the tangent line horn β The value of 30°, the bottom structure of the nozzle is a convex bottom, chamfered R2 The value of is 0mm, the height s of the molten steel spout hole is 50mm, the shape is a rectangle with chamfers, and the inclination angle of the slope 8 at the lower edge of the molten steel spit hole α The value of +30°, the angle between the inwardly i...

Embodiment 2

[0036] A submerged nozzle for slab electromagnetic swirling continuous casting, with a length of 900 mm, an inner diameter of 70 mm, and an outer diameter of 120 mm. The cross-sectional shape of the hollow inner cavity 2 is circular, and the hollow inner cavity is tapered. The depth of the slag line 4 is 15mm, the height of the slag line 4 is 130mm, the distance between the lower end of the slag line 4 and the lower surface of the nozzle bottom 5 is 150mm, and the angle between the tangent line of the inner curved surface 6 on the upper edge of the molten steel discharge hole on both sides β The value of 60°, the bottom structure of the nozzle is flat bottom, chamfered R2 The value of s is 10mm, the value of the height s of the molten steel spit hole is 60mm, the shape is circular, and the inclination angle of the slope 8 at the lower edge of the molten steel spit hole α The value of is 0°, the angle between the inwardly inclined side 9 of the molten steel spout hole and the w...

Embodiment 3

[0038] A submerged nozzle for slab electromagnetic swirl continuous casting, with a length of 1200mm, an inner diameter of 100mm, and an outer diameter of 150mm. The cross-sectional shape of the hollow inner cavity 2 is a square with chamfers. The depth of the slag line 4 is 25mm, the height of the slag line 4 is 160mm, the distance between the lower end of the slag line 4 and the lower surface of the nozzle bottom 5 is 200mm, and the inner curved surface 6 of the upper edge of the molten steel spout hole on both sides is tangent angle of β The value of 120°, the bottom structure of the nozzle is a concave bottom, chamfered R1 The value of 20mm, chamfer R2 The value of s is 20mm, the value of the height s of the molten steel spit hole is 100mm, and the shape is a combination of semicircle and square in the middle. α The value of -30°, the angle between the inwardly inclined side 9 of the molten steel discharge hole and the wide surface of the crystallizer θ The value of is ...

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Abstract

The invention belongs to the technical field of continuous casting and particularly relates to a submersed nozzle for plate blank electromagnetic rotational flow continuous casting. The submersed nozzle for the plate blank electromagnetic rotational flow continuous casting is composed of a molten steel inflowing end, a side wall, a hollow inner cavity, a nozzle bottom and molten steel discharging holes. The pair of molten steel discharging holes same in size and shape are laterally symmetrically formed in the side wall close to the nozzle bottom. The upper edge of each molten steel discharging hole is of an arc-shaped curved face. The included angle beta of inner surface tangents of each arc-shaped curved face is 30 degrees-120 degrees. The lower edge of each molten steel discharging hole is of a slope. The dip angle of each slope is -30 degrees to +30 degrees. One side face of each molten steel discharging hole is inclined inwards and the other side face is parallel to the wide face of a crystallizer. The included angle theta of the two side faces is 0 degree-20 degrees. According to the submersed nozzle for the plate blank electromagnetic rotational flow continuous casting, outflow of the two molten steel discharging holes can be evened, liquid level fluctuation on the meniscus portion of the crystallizer is reduced, the effect of rotational flow continuous casting is thoroughly achieved, and meanwhile impact effect on the wide face of the crystallizer by the outflow of the nozzle caused by the rotational flow can be reduced.

Description

technical field [0001] The invention belongs to the technical field of continuous casting, and in particular relates to a submerged nozzle for slab electromagnetic swirl continuous casting. Background technique [0002] Continuous casting of steel is a process in which liquid steel with a certain degree of superheat is continuously cooled through a water-cooled crystallizer into a solid billet with a certain shape. With the application and development of continuous casting technology, especially due to the higher and higher requirements of users for steel quality and the fierce competition in the international market, the quality of continuous casting slabs has been paid more and more attention. Strictly control the cleanliness of molten steel to reduce the Billet defect has become an important work in continuous casting production. [0003] As the "heart" of the continuous casting machine, the mold is where most of the surface defects and internal quality problems of the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/10B22D11/115B22D41/50
Inventor 王强苏志坚李德伟陈进王凯赫冀成丸川雄净
Owner 苑轶
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