CN102834206A - Immersed nozzle for casting and continuously casting apparatus including same - Google Patents

Immersed nozzle for casting and continuously casting apparatus including same Download PDF

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Publication number
CN102834206A
CN102834206A CN2010800639373A CN201080063937A CN102834206A CN 102834206 A CN102834206 A CN 102834206A CN 2010800639373 A CN2010800639373 A CN 2010800639373A CN 201080063937 A CN201080063937 A CN 201080063937A CN 102834206 A CN102834206 A CN 102834206A
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CN
China
Prior art keywords
main body
outlet
immersion nozzle
pair
vertical axis
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Pending
Application number
CN2010800639373A
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Chinese (zh)
Inventor
朴哲永
崔详培
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CHOSUN REFRACTORIES Co Ltd
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CHOSUN REFRACTORIES Co Ltd
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Publication date
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Publication of CN102834206A publication Critical patent/CN102834206A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50—Pouring-nozzles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

Provided are an immersed nozzle for casting and a continuously casting apparatus including the same. In the immersed nozzle, a body section includes an inlet for introducing molten metal and an internal hole extended from the inlet in the longitudinal axis direction thereof. A discharge section is connected to an end of the body section at the side opposite the inlet. The discharge section includes at least a pair of first outlets extended in the direction of the center of the longitudinal axis of the body section for the downward discharge of the molten metal in the direction of the center of the longitudinal axis of the body section; and at least a pair of second outlets disposed outside to at least a pair of first outlets.

Description

Immersion nozzle that is used to cast and the continuous casting apparatus that comprises immersion nozzle
Technical field
The present invention relates to metal casting device, more specifically, relate to immersion nozzle, it is used for supplying melting metal to mould, and relates to the continuous casting apparatus that comprises immersion nozzle.
Background technology
Casting technique (for example, continuous casting casting technique) relates to and is used for coming the technology of formation band continuously through the melted material (for example, motlten metal) that cooling is discharged from mould.Motlten metal is ejected into the mould from tundish through immersion nozzle.Mobile and the initial solidification that flows into the melted material of mould is to be used for definite principal element that casts the character of the band of accomplishing continuously.
The structure of immersion nozzle can become flowing of the melted material of adjustment in the mould.If melted material discharges vertically downward, melted material can fall into mould dearly and the layer that solidifies maybe be stably forms under mould.In addition, the melted material surface that maybe be not stably do not supplied in the mould melted material in the therefore mould possibly be solidified.On the other hand, if the diverted flow of melted material (flowing in its surface towards melted material) is stronger, it is unstable that the surface of melted material possibly become, and the layer that solidifies possibly form unevenly, so the quality of band possibly reduce.
Summary of the invention
Technical problem
The present invention provides the immersion nozzle that can increase the band quality, and the casting device that uses immersion nozzle.But, the problems referred to above are exemplary that provide and do not limit the scope of the invention.
Solution
According to aspects of the present invention, a kind of immersion nozzle that is used to cast is provided, said immersion nozzle comprises main body, and it comprises inlet, and melted material flows into through said inlet, and internal holes, and its vertical axis along said main body extends from inlet; And discharge unit; It comprises at least one pair of first outlet; It is connected to and the end of the relative main body that enters the mouth and the vertical axis that extends into towards main body tilt; Make melted material on the direction of the vertical axis of main body by discharging downwards, and at least one pair of second outlet, it is in the outer setting of at least one pair of first outlet.
At least one pair of second outlet may be extended to from the vertical axis of main body radially to tilt, make melted material on gradually away from the direction of the vertical axis of main body by discharging downwards.
The diameter of at least one pair of second outlet can be greater than the diameter of at least one pair of first outlet.
Discharge unit can comprise the bottom, and it extends on the vertical axis of main body, and sidewall, and it is connected to main body from the bottom, and at least one pair of first outlet can see through the bottom, and at least one pair of second exports and can see through sidewall.
The height of bottom can reduce on the direction away from the vertical axis of main body.
Main body may further include tapering part, and the diameter of internal holes increases towards discharge unit therein.
According to a further aspect in the invention, a kind of immersion nozzle that is used to cast is provided, said immersion nozzle comprises main body, and it comprises inlet, and melted material flows into through said inlet, and internal holes, and its vertical axis along said main body extends from inlet; And discharge unit, it is connected to and the end of the relative main body that enters the mouth, and wherein said discharge unit comprises the bottom, and it extends on the vertical axis of main body; Sidewall, it is connected to main body from the bottom; At least one pair of first outlet, it sees through the bottom and the vertical axis that extends into towards main body tilts, make melted material on the direction of the vertical axis of main body by discharging downwards; And at least one pair of second outlet, it sees through sidewall in the outer setting of at least one pair of first outlet, and the diameter that has of at least one pair of second outlet is greater than the diameter of at least one pair of first outlet.
According to a further aspect in the invention, a kind of continuous casting mold device is provided, it comprises above-mentioned immersion nozzle.
Beneficial effect
Based on immersion nozzle and continuous casting apparatus according to an embodiment of the invention, because the combination of first and second outlet, melted material can stably be supplied in the mould, and the surface of melted material can be stable.Like this, in the time of casting speed and casting change width, the flow of the lip-deep melted material of melted material can be adjusted in stability range, and the shear stress in the immersion nozzle can be reduced.
Description of drawings
Fig. 1 is the sketch map according to the continuous casting apparatus of the embodiment of the invention;
Fig. 2 is the perspective view according to the immersion nozzle of the embodiment of the invention;
Fig. 3 is the sectional view along the immersion nozzle of line III-III' incision shown in Figure 2;
Fig. 4 is the sectional view of immersion nozzle according to another embodiment of the present invention;
Fig. 5 is the sectional view according to the immersion nozzle of experimental embodiment of the present invention;
Fig. 6 is a diagrammatic sketch, and its simulation based on immersion nozzle shown in Figure 5 shows flow distribution; And
Fig. 7 is a diagrammatic sketch, and its simulation based on immersion nozzle shown in Figure 5 shows that internal shearing stress distributes.
The specific embodiment
Hereinafter, through being explained with reference to the drawings embodiments of the invention, the present invention will be described in detail.Yet embodiment described herein is implemented and should be constructed to be limited to the form that the present invention can be much different; But these embodiment are provided and make that the disclosure will be for thorough and complete, and will fully transmit notion of the present invention to those of ordinary skills.In the accompanying drawings, in order to explain that conveniently size of component can be exaggerated or reduce.
Among the embodiment below of the present invention, melted material can relate to the liquid substance that solidifies widely.For example, when metal was cast, melted material can relate to motlten metal.Especially, when steel was cast, melted material can relate to molten steel.
Fig. 1 is the sketch map according to the continuous casting apparatus of the embodiment of the invention.
With reference to Fig. 1, tundish 105 can contain the melted material 50 (for example, motlten metal) that forms in high temperature.Immersion nozzle 100 is connected to the bottom surface of tundish 105, and the end of immersion nozzle 100 can be inserted in the mould 140 to be used to limit the shape of band.Alternatively, the upper nozzle (not shown) and the plate member (not shown) that are used to control the amount of melted material 50 can further be provided between immersion nozzle 100 and tundish 105.
Melted material 50 inserts mould 140 through immersion nozzle 100 from tundish 105 and also initially solidifies to form solidification layer 51.The solidification layer 51 of leaving mould 140 is by the cooling medium cooling of spray nozzle 156 sprayings and form band 55, and band 55 has definite shape (for example, plate shape).Then, band 55 is directed roller 158 guiding and moves for subsequent technique.
Mobile and the initial solidification that flows into the melted material 50 of mould 140 is to be used for definite principal element that casts the character of the band of accomplishing 55 continuously.As will be described below, through optimizing the structure of immersion nozzle 100, can increase the stability of the melted material 50 that is inserted in the mould 140, thereby improve the quality of band 55 according to the continuous casting apparatus of current embodiment.
Fig. 2 is the perspective view according to the immersion nozzle 100 of the embodiment of the invention.Fig. 3 is the sectional view along the immersion nozzle 100 of line III-III' incision shown in Figure 2.
With reference to Fig. 2 and 3, immersion nozzle 100 can comprise main body 110 and discharge unit 120.Main body 110 can comprise inlet 112, and melted material shown in Figure 1 50 flows into through said inlet 112, and discharge unit 120 can comprise first and second outlet 123 and 126, and melted material 50 is through said first and second outlet 123 and 126 outflows.Discharge unit 120 can be used as that form or form with the integral piece of main body 110 can be from main body 110 dismountings.If main body 110 forms as integral piece with discharge unit 120, discharge unit 120 can refer to the part at first and second place, outlet 123 and 126 location of immersion nozzle 100.In this case, main body 110 can refer to vertical axis V1 along immersion nozzle 100 from 112 remainders to discharge unit 120 that enter the mouth.
Immersion nozzle 100 can be formed by fire proofing material, and fire proofing material can not worsen owing to the high temperature of melted material 50.For example, immersion nozzle 100 can be by oxide, nitride, carbide, or its mixture forms.The above-mentioned material of immersion nozzle 100 only is example and the scope that does not limit current embodiment.
Main body 110 can comprise inlet 112, and melted material 50 flows into and internal holes 113 through said inlet 112, and it is connected to said inlet 112.Internal holes 113 can be extended along the vertical axis V1 of immersion nozzle 100 or main body 110.Internal holes 113 can have the scope that different shape and shape do not limit current embodiment.For example, main body 110 can comprise tapering part 114, and wherein the diameter D1 of internal holes 113 increases towards discharge unit 120.Like this, can propagate towards discharge unit 120 through the melted material 50 of internal holes 113.
Discharge unit 120 can be connected to and enter the mouth 112 relative main bodys 110 the end and can comprise bottom 122 and sidewall 125.Bottom 122 can be extended on the vertical axis V1 of main body 110 and closed interior hole 113 partly thus.Sidewall 125 can be from the bottom 122 extend upward and can be connected to main body 110 the end.For example, sidewall 125 can have crooked shape, and wherein the width of sidewall 125 122 is to increase then greatly to reduce towards main body 110 from the bottom a little.For example, the cross section of discharge unit 120 can completely or partially have polygonal shape, for example, and octagonal shape.
Bottom 122 can have from the bottom shapes that 122 external peripheral surface 124 inwardly increases.External peripheral surface 124 can be the bottom surface of immersion nozzle 100.The cross section of discharge unit 120 can have polygonal shape, and external peripheral surface 124 can be substantially perpendicular to the vertical axis V1 of main body 110.Bottom 122 height, promptly from the thickness of the bottom 122 of external peripheral surface 124, can be towards the bottom 122 edge reduce from the vertical axis V1 of main body 110.
At least one pair of first outlet 123 can see through bottom 122 and can be connected to internal holes 113.For example, first outlet 123 can be provided with respect to the vertical axis V1 of main body 110 symmetrically.First outlet 123 can be tilted towards the vertical axis V1 of main body 110, makes melted material 50 in mould shown in Figure 1 140, assemble.For example, the distance from each first outlet, cross-section center of 123 to the vertical axis V1 of main body 110 can little by little or step by step reduce towards the outside of discharge unit 120 internally.The width of first outlet 123 can be kept unchangeably or can be according to the change in depth of first outlet 123.
Like this, melted material 50 can flow downward and can assemble on the direction of the vertical axis V1 of main body 110 and get into the mould 140 from first outlet 123.First outlet 123 can adjust the melted material 50 that flows into vertically down in the mould 140 to dirty.Owing to collide each other then from the stream of melted material 50 of first outlet, 123 dischargings and to propagate, can prevent that melted material 50 from exceedingly vertically falling into mould 140, can prevent that thus solidification layer shown in Figure 1 51 from forming astatically.
At least one pair of second outlet 126 can see through sidewall 125 in the outside of first outlet 123 and can be connected to internal holes 113.For example, second outlet 126 can be provided with respect to the vertical axis V1 of main body 110 symmetrically.Second outlet 126 can be radially downward-sloping from the vertical axis V1 of main body 110.For example, the distance from each second outlet, cross-section center of 126 to the vertical axis V1 of main body 110 can little by little or step by step increase towards the outside of discharge unit 120 internally.The width of second outlet 126 can be kept unchangeably or can be according to the change in depth of second outlet 126.
For example, as shown in Figure 3, sidewall 125 can have polygonal cross section, and second outlet 126 can see through at least two surfaces of sidewall 125.Above-mentioned shape can help to adjust more subtly the emission direction and the amount of melted material 50.
Like this, melted material 50 on gradually away from the direction of the vertical axis V1 of main body 110 from second outlet 126 discharging downwards.From the melted material 50 of second outlet, 126 dischargings can with mould 140 and Radial Flow to dirty collision, and therefore can produce the diverted flow that flows towards the surface of melted material 50.
As stated because first and second outlet combination of 123 and 126, melted material 50 in addition can be in high-speed casting and low speed stably be supplied in casting, and the surface of melted material 50 can be stable.In the time of casting speed and casting change width, the flow of melted material 50 can be adjusted in stability range.For example; The surface of melted material 50 can be through using first outlet 123 by stable; And total stationary flow of melted material 50 and uniform flux can be guaranteed that the diameter D3 that second outlet 126 has is greater than the diameter D2 of first outlet 123 through using second outlet 126.
Fig. 4 is the sectional view of immersion nozzle 100a according to another embodiment of the present invention.Immersion nozzle 100a and the immersion nozzle 100 shown in Fig. 2 and 3 according to current embodiment have been made partly modification, and therefore the description of its repetition here no longer is provided.
With reference to Fig. 4, discharge unit 120a can comprise bottom 122 and sidewall 125a.The cross section of discharge unit 120a can completely or partially have hexagonal configuration.First outlet 123 can see through bottom 122, the second outlet 126a can see through sidewall 125a.The second outlet 126a is the second outlet 126a at least one surface through sidewall 125a with the difference of second outlet 126 shown in Figure 3.
Discharging unit for discharging 120 in Fig. 3 and the foregoing description of 4 and the shape of 120a only are examples, and these embodiment define the present invention.For example, though toply described one or two surface that second outlet 126 or 126a see through sidewall 125 or 125a, they can see through three or more a plurality of surface.In addition, the quantity of first outlet, 123 or second outlet 126 or 126a can be three or more a plurality of.The shape of bottom 122 also can suitably change.
Through carrying out imitation the characteristic according to the immersion nozzle of experimental embodiment of the present invention is described now.
Fig. 5 is the sectional view according to the immersion nozzle 300 of experimental embodiment of the present invention.
With reference to Fig. 5, immersion nozzle 300 can comprise first and second outlet 123 and 126.Immersion nozzle 300 can be identical with the immersion nozzle 100 shown in Fig. 2 and 3 basically.
Fig. 6 is a diagrammatic sketch, and its simulation based on immersion nozzle shown in Figure 5 300 shows flow distribution.In Fig. 6, flow towards redness partly be increase and reduce towards blue portion.
With reference to Fig. 6, assemble to dirty 52a from first of first outlet, 123 dischargings, propagate downwards to dirty 53a from second of second outlet, 126 dischargings.Because first and second flow to dirty 52a and 53a is not very different, look that total flow can keep unchangeably in the steady quality scope.Second part to dirty 53a and mould shown in Figure 1 140 collisions is turned to, and towards the surface-stable flows of melted material.Correspondingly, according to current experimental embodiment, the two can be guaranteed the flow stability of melted material and surface stability.
Fig. 7 is a diagrammatic sketch, and its simulation based on immersion nozzle shown in Figure 5 300 shows that internal shearing stress distributes.In Fig. 7, shear stress towards redness partly be increase and reduce towards blue portion.
With reference to Fig. 7, see that immersion nozzle 300 can have low-down shear stress near first and second outlet 123 and 126.
Although the present invention is shown and description by special about its exemplary embodiment, those skilled in the art will appreciate that and can under the situation of the spirit and scope of the present invention that claims limited below not breaking away from, carry out the various variations of form and details.

Claims (9)

1. immersion nozzle that is used to cast, said immersion nozzle comprises:
Main body, said main body comprises inlet, and melted material flows into through said inlet, and said main body comprises internal holes, and its vertical axis along said main body extends from inlet; And
Discharge unit; Said discharge unit comprises at least one pair of first outlet; It is connected to and the end of the relative main body that enters the mouth and the vertical axis that extends into towards main body tilt; Make melted material on the direction of the vertical axis of main body by discharging downwards, and said discharge unit comprises at least one pair of second outlet, it is in the outer setting of at least one pair of first outlet.
2. immersion nozzle according to claim 1 is characterized in that, at least one pair of second outlet extends into from the vertical axis of main body radially to tilt, make melted material on gradually away from the direction of the vertical axis of main body by discharging downwards.
3. immersion nozzle according to claim 2 is characterized in that, the diameter of at least one pair of second outlet is greater than the diameter of at least one pair of first outlet.
4. immersion nozzle according to claim 1 is characterized in that, discharge unit comprises the bottom, and it extends on the vertical axis of main body, and discharge unit comprises sidewall, and it is connected to main body from the bottom, and
Wherein at least one pair of first outlet sees through the bottom, and at least one pair of second outlet sees through sidewall.
5. immersion nozzle according to claim 4 is characterized in that, the height of bottom reduces on the direction away from the vertical axis of main body.
6. immersion nozzle according to claim 1 is characterized in that main body further comprises tapering part, and the diameter of internal holes increases towards discharge unit therein.
7. immersion nozzle according to claim 1 is characterized in that discharge unit has polygonal cross section.
8. immersion nozzle that is used to cast, said immersion nozzle comprises:
Main body, said main body comprises inlet, and melted material flows into through said inlet, and said main body comprises internal holes, and its vertical axis along said main body extends from inlet; And
Discharge unit, it is connected to and the end of the relative main body that enters the mouth,
Wherein said discharge unit comprises:
The bottom, it extends on the vertical axis of main body;
Sidewall, it is connected to main body from the bottom;
At least one pair of first outlet, it sees through the bottom and the vertical axis that extends into towards main body tilts, make melted material on the direction of the vertical axis of main body by discharging downwards; And
At least one pair of second outlet, it sees through sidewall in the outer setting of at least one pair of first outlet, and the diameter that has of at least one pair of second outlet is greater than the diameter of at least one pair of first outlet.
9. continuous casting mold device, it comprises immersion nozzle according to claim 1.
CN2010800639373A 2010-01-18 2010-12-28 Immersed nozzle for casting and continuously casting apparatus including same Pending CN102834206A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR10-2010-0004280 2010-01-18
KR20100004280A KR101170673B1 (en) 2010-01-18 2010-01-18 Immersion nozzle for casting and continuous casting apparatus including the same
PCT/KR2010/009384 WO2011087225A2 (en) 2010-01-18 2010-12-28 Immersed nozzle for casting and continuously casting apparatus including same

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CN102834206A true CN102834206A (en) 2012-12-19

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CN (1) CN102834206A (en)
WO (1) WO2011087225A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104096812A (en) * 2013-04-15 2014-10-15 维苏威高级陶瓷(苏州)有限公司 Thin billet plate fast-to-replace submerged nozzle
TWI655041B (en) * 2013-11-07 2019-04-01 美商維蘇威美國公司 Nozzle and casting installation

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CN105833623B (en) * 2016-04-05 2018-10-16 河南理工大学 Pulse backblowing deashing device and its gas ejector, filter device
CN105727648B (en) * 2016-04-05 2018-06-22 河南理工大学 Pulse backblowing deashing device and its gas ejector, filter device
CN105833624B (en) * 2016-04-05 2018-06-22 河南理工大学 Pulse backblowing deashing device and its gas ejector, filter device
CN105771468B (en) * 2016-04-05 2019-05-21 河南理工大学 Pulse backblowing deashing device and its nozzle, filter device

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JPH10128506A (en) * 1996-10-29 1998-05-19 Nippon Steel Corp Immersion nozzle for continuous casting
JPH1147897A (en) * 1997-07-31 1999-02-23 Nippon Steel Corp Immersion nozzle for continuously casting thin and wide cast slab
CN1222104A (en) * 1996-06-19 1999-07-07 乔维尼·阿维迪 Submerged nozzle for continuous casting of thin slabs
CN101298093A (en) * 2008-06-30 2008-11-05 北京科技大学 Entry nozzle for inhibiting dynamic instability of CSP thin slab mold liquid level

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JPH05131250A (en) * 1991-11-13 1993-05-28 Sumitomo Heavy Ind Ltd Immersion nozzle for continuous casting
JPH0641950U (en) * 1992-11-11 1994-06-03 愛知製鋼株式会社 Immersion nozzle for continuous casting
JP2004283850A (en) 2003-03-20 2004-10-14 Jfe Steel Kk Continuous casting method

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
CN1222104A (en) * 1996-06-19 1999-07-07 乔维尼·阿维迪 Submerged nozzle for continuous casting of thin slabs
JPH10128506A (en) * 1996-10-29 1998-05-19 Nippon Steel Corp Immersion nozzle for continuous casting
JPH1147897A (en) * 1997-07-31 1999-02-23 Nippon Steel Corp Immersion nozzle for continuously casting thin and wide cast slab
CN101298093A (en) * 2008-06-30 2008-11-05 北京科技大学 Entry nozzle for inhibiting dynamic instability of CSP thin slab mold liquid level

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104096812A (en) * 2013-04-15 2014-10-15 维苏威高级陶瓷(苏州)有限公司 Thin billet plate fast-to-replace submerged nozzle
TWI655041B (en) * 2013-11-07 2019-04-01 美商維蘇威美國公司 Nozzle and casting installation

Also Published As

Publication number Publication date
KR101170673B1 (en) 2012-08-03
KR20110084628A (en) 2011-07-26
WO2011087225A3 (en) 2011-10-27
WO2011087225A2 (en) 2011-07-21

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Application publication date: 20121219