CN201186346Y - Immersion water inlet of technique for pouring broad plate blank with double-water inlet - Google Patents
Immersion water inlet of technique for pouring broad plate blank with double-water inlet Download PDFInfo
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- CN201186346Y CN201186346Y CNU2008200577697U CN200820057769U CN201186346Y CN 201186346 Y CN201186346 Y CN 201186346Y CN U2008200577697 U CNU2008200577697 U CN U2008200577697U CN 200820057769 U CN200820057769 U CN 200820057769U CN 201186346 Y CN201186346 Y CN 201186346Y
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- river
- mouth
- molten steel
- nozzle
- crystallizer
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Abstract
The utility model relates to a submerged nozzle which is used in the technique that double nozzles cast a wide slab, wherein the upper end and the lower end are respectively connected with a bakie and a slab continuous casting crystallizer, the submerged nozzle comprises two submerged nozzles which are inserted in the slab continuous casting crystallizer. Openings are respectively arranged on two sides of each nozzle to form an inner side hole and an outer side hole, the inner side hole and the outer side hole of one nozzle are distributed in a staggering mode, inner side holes of two nozzles are on same height, the outer side holes are on same height, and the outer side holes are higher than the inner side holes. The dip angle of the inner side holes of the nozzle is downward and the dip angle of the outer side holes of the nozzle is upward. The liquid level of the crystallizer fluctuates stably on the basis of guaranteeing the steel passing capacity, the shock of molten steel fluid flow of the outer side holes of the nozzles to an initial solidified shell is reduced, the turbulent flow of the molten steel in the crystallizer is lowered, the molten steel flow pattern is stabilized, the molten steel is evenly distributed in the crystallizer, the temperature difference between the molten steel on the center and the molten steel on the edge portion when the wide slab is casted is lowered, and the submerged nozzle has bigger flexibility for replacing stop rods.
Description
Technical field
The utility model relates to a kind of continuous casting installation for casting, specifically is a kind of submersed nozzle that is used to adopt two mouth of a river casting wide plate bases.
Background technology
Molten steel enters into crystallizer from tundish by submersed nozzle, forms certain thickness base shell through supercooling, progressively cools off in two cold-zones then and solidifies fully.In this process, submersed nozzle plays the effect of a water conservancy diversion and protection molten steel.In order to form stable initial solidification base shell in crystallizer, and avoid rolling up slag, the metallargist has designed various difform submersed nozzles, to obtain good molten steel nowed forming and slab quality.
In traditional submersed nozzle used, molten steel was from the mouth of a river side opening back rectilinear motion that comes out, and the one side expansion flows to the leptoprosopy of crystallizer, and it becomes very strong impact to initial base hull shape.Be divided into two stream thighs up and down during stream thigh arrival crystallizer leptoprosopy.Stream thigh upwards forms a whirlpool recirculating zone near liquid level, this reflux to field trash be involved in and the fluctuation of mold liquid level plays fundamental influence, the superficial velocity of this backflow of while also plays an important role to the fusing of covering slag.And the recirculating zone that the crystallizer bottom forms is opposite with the top loop direction, scope is bigger, its intensity weakens along with the extension of downward distance, to the formation of base shell also important influence.When adopting single mouth of a river to pour into a mould the wide plate base, the temperature difference of crystallizer inner edge portion's molten steel and center molten steel strengthens, and causes the increase of quality of edges problem, has also increased the probability of bonding steel leakage.And adopting the cast of single mouth of a river, operating flexibility is poor, need stop cast when changing stopper.
Consider from the submersed nozzle angle; in order to produce high-quality strand and to guarantee the stable of cast, will accomplish following some: reduce the fluctuation of mold liquid level, reduce being involved in of covering slag; avoid forming the impact of molten steel, also will guarantee enough steel-passing amounts simultaneously solidified shell.
Chinese patent CN91227348.8 adopts the cast of the diplopore list mouth of a river, and molten steel flows out the back and directly impacts the base shell, influences slab quality.Chinese patent CN99204644.0 and CN200520046135.8 adopt the cast of four holes, single mouth of a river, molten steel is divided into upwash thigh and following dumping tower tray thigh in side, the mouth of a river, utilize liquidating of two stream thighs, reduce the kinetic energy and the impulsive force of stream thigh, thereby reduce the fluctuation of mold liquid level, reduce the impact of molten steel the base shell.But when utilizing this mouth of a river cast wide plate base, because the minimizing of molten steel kinetic energy, the difference of limit portion and central temperature can be more obvious.
Chinese patent CN200520012263.0 has designed a kind of special-shaped submersed nozzle in four holes that is used for the sheet billet high throughput, two mouths of a river, lower end are downward, the stream thigh is to the expansion of narrow limit, utilization has more the hole and shunts the purpose that reaches steady flow condition and mold liquid level, but neither very suitable cast wide plate base.
Chinese patent CN02111188.X utilizes two mouths of a river to carry out the cast of wide plate and sheet billet, each mouth of a river is provided with the expansion stem bar in same level height, so improve the flow field uniformity of molten steel in crystallizer, make molten steel have flowability in each part, reduce the temperature difference of limit portion's molten steel and center molten steel, but this method has still formed side molten steel stream thigh impacts solidified shell, also influential to the fluctuation of mold liquid level.
Summary of the invention
The purpose of this utility model is to provide a kind of submersed nozzle that is used for two mouths of a river cast wide plate bases, the central steel liquid temp and the limit portion molten steel temperature difference when solving single mouth of a river cast wide plate base; Overcome the impact of liquid level fluctuation of crystallizer in the cast of the existing two mouths of a river and molten steel to initial solidification base shell; Simultaneously, increase the flexibility of slab pouring operation.
For achieving the above object, the technical solution of the utility model is,
The wide plate cast is carried out at the two mouths of a river of the utility model utilization, and two side openings are opened at each mouth of a river, and two side openings are dislocatedly distributed in both sides, the mouth of a river, be in different height, and inclination direction are opposite.Identical at inboard two height that portal, two height that portal in the outside are identical.Reduce fluctuation by reducing apertura lateralis outlet molten steel static pressure to mold liquid level; At interior side outlet, the mutual consumption of molten steel kinetic energy has reduced stirs crystallizer molten steel simultaneously, utilizes two mouths of a river to come the evenly distribution of molten steel on wide direction, even with the temperature that reaches limit portion molten steel and center molten steel.
Particularly, a kind of submersed nozzle that is used for two mouth of a river cast wide plate base technologies of the present utility model, its upper and lower side connects tundish and continuous casting crystallizer for plate billet respectively; Comprise two submersed nozzles that insert in the continuous casting crystallizer for plate billet,, form inside and outside side opening in the perforate respectively of each both sides, the mouth of a river; The inside and outside side opening at the same mouth of a river is dislocatedly distributed up and down; The inboard aperture at two mouths of a river is at sustained height, and apertura lateralis is at sustained height, and apertura lateralis is than inboard aperture height.
Further, inboard aperture inclination angle, the described mouth of a river is downward, and the apertura lateralis inclination angle upwards.
Described mouth of a river apertura lateralis is to 10 °～35 ° of updips; Inboard aperture dips down 10 °～35 °.
Again, the mouth of a river described in the utility model body upper end section is a round entrance, and body lower end, mouth of a river section is flat-shaped, and the centre is a cylinder.
In addition, the mouth of a river described in the utility model body comprises upper body, middle body, lower body, and described mouth of a river apertura lateralis is positioned at the upper end of lower body; Described mouth of a river inboard aperture is positioned at the lower end of lower body.
Principle of the present utility model is:
From physically, being it from the kinetic energy of aperture trickle compensates from the descend minimizing of (H-h) height gravitional force of liquid level, that is:
In the formula: the m-liquid quality
G-acceleration of gravity
The H-liquid level
The h-aperture height
The v-liquid rate of outflow
Can draw the initial velocity of exit fluid from following formula:
Can draw thus: fluid pressure is determined that by the degree of depth liquid is dark more, and pressure is just big more, and the speed of fluid is then big more, and kinetic energy is also big more; Liquid is shallow more, and pressure is just more little, and fluid velocity is more little, and kinetic energy is also more little.
As shown in Figure 4, a cylindrical container is opened three holes respectively along the height diverse location on container.With the container filled with water, water will be from three aperture ejections then.Can find to spray farthest from the water of bottom ejection, secondly be the water at middle part, and spray nearest is the water from the top ejection.Just topmost the hydrodynamic(al) that comes out of hole more bottom the hydrodynamic(al) that comes out of hole can be much smaller also little many of flow.The utility model is applied to this principle in the submersed nozzle exploitation, and two side openings in the mouth of a river are dislocatedly distributed, and is in different height.
After molten steel entered in the crystallizer by two mouths of a river, because the difference of molten steel static pressure, the inboard aperture place suffered static pressure of molten steel was bigger, and the molten steel rate of outflow is bigger, and then kinetic energy is bigger.The inboard aperture height at two mouths of a river is identical, and is symmetrical distribution, so molten steel flows out homomorphosis, meets at the crystallizer center.So, the molten steel that comes out from two inboard aperture clashes into mutually, and the kinetic energy of having cancelled out each other has avoided producing owing to pressure is excessive big turbulent flow.And because inboard aperture place pressure is big, the molten steel amount that flows out from inboard aperture is also bigger, has guaranteed steel-passing amount.And apertura lateralis is less owing to molten steel static pressure, and the molten steel flowing velocity is less, and then kinetic energy is less.So the apertura lateralis molten steel is less to the stirring of mold liquid level, the molten steel liquid fluctuating is little.So, not only reduced molten steel to being involved in of covering slag, and, made covering slag obtain enough heats and dissolve because certain flowing arranged.The molten steel that comes out from apertura lateralis upwards flows out along the inclination angle simultaneously, and its kinetic energy is less, and the molten steel flow is also less, and is therefore also less to the impact of initial base shell, helps the formation of solidified shell.From top analysis as can be seen, guaranteeing not only to have reduced the fluctuation of mold liquid level on the basis of steel-passing amount, and reducing burst the impact of molten steel stream, the quality of strand is being improved a lot strand leptoprosopy initial solidification base shell.
In addition, two mouths of a river are connected with tundish respectively, adopt two stoppers that the steel flow is controlled respectively at tundish, realize the control of mould liquid level with this, can the online replacing of carrying out stopper in casting process.In the replacing process, at first stop to change the work of stopper, the another stopper works on and guarantees the control of mould liquid level, disassembles stopper then, and new stopper is installed.
The beneficial effects of the utility model
1. on the basis that guarantees steel-passing amount, liquid level fluctuation of crystallizer is steady;
2. reduce mouth of a river apertura lateralis molten steel stream burst impact to initial solidification base shell;
3. reduce the Turbulence Flow of molten steel, stablize the molten steel nowed forming in crystallizer inside;
4. molten steel distributed uniform in crystallizer, the temperature difference of center and limit portion molten steel when reducing the cast wide plate;
5. has bigger flexibility to changing stopper.
Description of drawings
Fig. 1 is the structural representation of two submersed nozzle one embodiment of the utility model;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is the hydrostatic pressure schematic diagram.
The specific embodiment
Referring to Fig. 1～Fig. 3, a kind of submersed nozzle that is used for two mouth of a river cast wide plate base technologies of the present utility model, its upper and lower side connects tundish and continuous casting crystallizer for plate billet respectively; Comprise two submersed nozzles 1,2 that insert in the continuous casting crystallizer for plate billet,, form inboard aperture 11,21, apertura lateralis 12,22 in the perforate respectively of each 1,2 both sides, the mouth of a river; The inside and outside side opening at the same mouth of a river is dislocatedly distributed up and down; The inboard aperture 11,21 at two mouths of a river 1,2 is at sustained height, and apertura lateralis 12,22 is at sustained height, and apertura lateralis 11,21 is than inboard aperture 12,22 height; Inboard aperture 11,21 inclination angles in the described mouth of a river are downward, and apertura lateralis 12,22 inclination angles upwards.
Body upper end, the mouth of a river described in the utility model section is a round entrance, and body lower end, mouth of a river section is flat-shaped, and the centre is a cylinder.
With the mouth of a river 1 is example, and the described mouth of a river 1 comprises upper body 101, middle body 102, lower body 103, and described mouth of a river apertura lateralis 12 is positioned at the upper end of lower body 103; Described mouth of a river inboard aperture 11 is positioned at the lower end of lower body 103.
Apertura lateralis 12,22 is to updip 10～35., inboard aperture 11,21 dips down 10～35., two immerse the mouth of a river and be in symmetric position in crystallizers.
When carrying out the slab cast, molten steel enters in the crystallizer 3 by submersed nozzle 1,2 from tundish.Since the effect of ferrostatic pressure, molten steel from the mouth of a river 1, inboard aperture 11,21 rates of outflow in lower end are higher, kinetic energy is big, direction is tilted to down along mouth of a river direction.Because for being symmetrically distributed, meet in crystallizer 1 center so flow out molten steel from inboard aperture 11,21 in crystallizer 3 in the mouth of a river 1,2, kinetic energy is cancelled out each other, and has weakened greatly to continue downward motion, so reduced molten steel turbulent flow in the crystallizer 3.Simultaneously, because the flow of two inboard aperture 11,21 is bigger, therefore can guarantee steel-passing amount.
And molten steel is little from mouth of a river apertura lateralis 12,22 outflow static pressures, and flow velocity is little, and kinetic energy is little, is tilted to along the side opening direction.These two two stream thighs form backflow upwards, but its kinetic energy are very little when running into crystallizer 3 leptoprosopy, stir also less to mold liquid level.And the motion of liquid level molten steel is enough to guarantee dissolving of covering slag.Simultaneously, two stream thighs are vertically gone up the position by last, and are therefore less to the impact of initial solidification base shell, help the formation of initial solidification base shell, guaranteed the quality of strand.
To the independent stopper of each mouth of a river configuration.Can carry out the online replacing of stopper in casting process, flow is controlled by two stoppers respectively at tundish in the mouth of a river 1,2, realizes the control of crystallizer 3 liquid levels.When carrying out the stopper replacing, keep the duty of another stopper.Remove the stopper that to change, the new stopper of packing into.
Claims (7)
1. one kind is used for pair submersed nozzle of mouths of a river cast wide plate base technologies, and its upper and lower side connects tundish and continuous casting crystallizer for plate billet respectively; It is characterized in that, comprise two submersed nozzles that insert in the continuous casting crystallizer for plate billet,, form inside and outside side opening in the perforate respectively of each both sides, the mouth of a river; The inside and outside side opening at the same mouth of a river is dislocatedly distributed up and down; The inboard aperture at two mouths of a river is at sustained height, and apertura lateralis is at sustained height, and apertura lateralis is than inboard aperture height.
2. the submersed nozzle that is used for two mouth of a river cast wide plate base technologies as claimed in claim 1 is characterized in that inboard aperture inclination angle, the described mouth of a river is downward, and the apertura lateralis inclination angle upwards.
3. the submersed nozzle that is used for two mouth of a river cast wide plate base technologies as claimed in claim 2 is characterized in that described mouth of a river apertura lateralis is to 10 °～35 ° of updips.
4. the submersed nozzle that is used for two mouth of a river cast wide plate base technologies as claimed in claim 1 or 2 is characterized in that described mouth of a river body upper end section is a round entrance, and body lower end, mouth of a river section is flat-shaped, and the centre is a cylinder.
5. the submersed nozzle that is used for two mouth of a river cast wide plate base technologies as claimed in claim 1 or 2 is characterized in that the described mouth of a river comprises upper body, middle body, lower body, and described mouth of a river apertura lateralis is positioned at the upper end of lower body; Described mouth of a river inboard aperture is positioned at the lower end of lower body.
6. the submersed nozzle that is used for two mouth of a river cast wide plate base technologies as claimed in claim 5 is characterized in that upper body, described mouth of a river inlet is infundibulate, and middle body is a cylinder, and lower body is flat-shaped.
7. the submersed nozzle that is used for two mouth of a river cast wide plate base technologies as claimed in claim 1 or 2 is characterized in that each mouth of a river is connected with tundish respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200577697U CN201186346Y (en) | 2008-04-25 | 2008-04-25 | Immersion water inlet of technique for pouring broad plate blank with double-water inlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200577697U CN201186346Y (en) | 2008-04-25 | 2008-04-25 | Immersion water inlet of technique for pouring broad plate blank with double-water inlet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201186346Y true CN201186346Y (en) | 2009-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200577697U Expired - Fee Related CN201186346Y (en) | 2008-04-25 | 2008-04-25 | Immersion water inlet of technique for pouring broad plate blank with double-water inlet |
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| CN (1) | CN201186346Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102319885A (en) * | 2011-09-28 | 2012-01-18 | 中冶南方工程技术有限公司 | Continuous casting method and device for double-nozzle cast ultra-thick plate blank |
| CN102361712A (en) * | 2009-03-25 | 2012-02-22 | 新日本制铁株式会社 | Immersion nozzle for continuous casting |
| CN103042204A (en) * | 2013-01-23 | 2013-04-17 | 辽宁福鞍重工股份有限公司 | Rapid pouring method for double-gate ladle |
| CN112548055A (en) * | 2020-12-11 | 2021-03-26 | 西南铝业（集团）有限责任公司 | Device and method for semi-continuous casting of ultra-wide aluminum alloy slab ingot |
-
2008
- 2008-04-25 CN CNU2008200577697U patent/CN201186346Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361712A (en) * | 2009-03-25 | 2012-02-22 | 新日本制铁株式会社 | Immersion nozzle for continuous casting |
| CN102361712B (en) * | 2009-03-25 | 2014-02-26 | 新日本制铁株式会社 | Immersion nozzle for continuous casting |
| CN102319885A (en) * | 2011-09-28 | 2012-01-18 | 中冶南方工程技术有限公司 | Continuous casting method and device for double-nozzle cast ultra-thick plate blank |
| CN103042204A (en) * | 2013-01-23 | 2013-04-17 | 辽宁福鞍重工股份有限公司 | Rapid pouring method for double-gate ladle |
| CN103042204B (en) * | 2013-01-23 | 2014-12-10 | 辽宁福鞍重工股份有限公司 | Rapid pouring method for double-gate ladle |
| CN112548055A (en) * | 2020-12-11 | 2021-03-26 | 西南铝业（集团）有限责任公司 | Device and method for semi-continuous casting of ultra-wide aluminum alloy slab ingot |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090128 Termination date: 20160425 |