CN201603853U - Quadripuntal submersed nozzle used for pouring conventional plate blank and preventing molten steel turbulence - Google Patents
Quadripuntal submersed nozzle used for pouring conventional plate blank and preventing molten steel turbulence Download PDFInfo
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- CN201603853U CN201603853U CN2010200330259U CN201020033025U CN201603853U CN 201603853 U CN201603853 U CN 201603853U CN 2010200330259 U CN2010200330259 U CN 2010200330259U CN 201020033025 U CN201020033025 U CN 201020033025U CN 201603853 U CN201603853 U CN 201603853U
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Abstract
The utility model discloses a quadripuntal submersed nozzle used for pouring conventional plate blank and preventing molten steel turbulence, comprising a water gap body with the main body having a center through hole-type cylindrical pipe shape, wherein the upper end of the water gap body is provided with a funneled molten steel inflow opening, and the bottom part of the lower end thereof is sealed; the tube wall at the lower part of the water gap body is provided with a pair of upper molten steel discharging holes and a pair of lower molten steel discharging holes, which are at different heights and are rectangular structures with chamfers; the discharging holes are distributed in a pairwise opposite running-through manner; the positions of the central points of the upper discharging hole and the lower discharging hole at the same side form a straight line along the vertical direction; in addition, the four discharging holes all have a certain included angle with the horizontal line; and the included angle of the two discharging holes at the same side are opposite. The quadripuntal submersed nozzle used for pouring the conventional plate blank and preventing the molten steel turbulence has simple structure and low cost, is applicable to the pouring field of conventional plate blank in the ferrous metallurgy field, reduces the molten steel turbulence in the plate blank crystallizer, stabilizes the flow field, and improves the continuous casting quality.
Description
Technical field
The utility model relates to be supplied with in the continuous casting of metal or processing motlten metal field, relates in particular to a kind of four hole submersed nozzles that can reduce the inner molten steel turbulent flow of plate slab crystallizer, steady flow condition that are used to pour into a mould conventional slab, belongs to metallurgical continuous casting equipment.
Background technology
At present each tame iron and steel manufacturer uses submersed nozzle usually in the production process of continuous casting billet; in the casting process; submersed nozzle has played the effect of water conservancy diversion and protection molten steel; form the uniform molten steel distribution of flow field and temperature in crystallizer, cooling forms the uniform solidified shell of thickness through the crystallizer water-cooled.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.
And the submersed nozzle under the prior art is in its use, and molten steel is 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 refluxes the fluctuation of floating foreign and mold liquid level and volume slag is played fundamental influence; the superficial velocity of this backflow simultaneously also plays an important role to the fusing of covering slag; therefore, last backflow has important relation with slab surface quality.And the recirculating zone that the formation of crystallizer bottom is opposite with the top loop direction, scope is bigger, its intensity weakens along with the extension of downward distance, to the solidified shell important influence of crystallizer outlet.Simultaneously, the following involute tiny bubble of going into that refluxes can adhere to and be mingled with along with molten steel together moves, and forms field trash at the solidification front of strand and assembles, and this phenomenon is very serious to the influence of the internal soundness of strand and subsequent handling.Therefore, when adopting diplopore mouth of a river cast slab, four big backflows in crystallizer all can impact the surface and the internal soundness of strand.Consider from the submersed nozzle angle, in order to produce high-quality strand and to guarantee the stable of cast, will accomplish following some:
1. reduce the fluctuation of mold liquid level;
2. reduce being involved in of covering slag, avoid forming the impact of molten steel solidified shell;
3. the bubble of avoiding molten steel to impact taking an advanced study and be mingled with and be difficult to come-up;
4. also need to guarantee enough steel-passing amounts.
The Chinese patent of publication number CN2108596, a kind of special-shaped submersed nozzle, adopting the upper end at the mouth of a river is the conical funnel type, middle-end is the ellipse mouth of a river, the lower end is the design of the whole extension that two levels or delivery port that is directed downwards and delivery port are arranged of back cover, can play the effect at the inner uniform distribution molten steel of crystallizer.
Though this patent has been made improvement to the even distribution of molten steel, the molten steel of this submersed nozzle still directly impacts the base shell after flowing out, and influences slab quality.
The Chinese patent of publication number CN2362624-a kind of submerged nozzle for continuous casting of thin slabs, its profile, main channel and outlet shape all are flat ellipse.Outlet is positioned at both sides, the mouth of a river, has two at least to (four).By steel stream being separated into upwash thigh and following dumping tower tray thigh, weakening stream strand kinetic energy and impulsive force, and it collide in crystallizer dissipating momentum mutually, thereby in minimizing mold liquid level turbulent flow, reduced steel and flowed impact solidified shell.
The submersed nozzle of above-mentioned patent can only be used to pour into a mould sheet billet, and is because in sheet billet was produced, pulling rate was higher, and the crystallizer space is limited, different with the residing job specification that is used to pour into a mould conventional slab of the utility model.
The Chinese patent of publication number CN2834744-a kind of continuous casting tundish submersed nozzle, be included in the relative both sides of mouth of a river cylinder lateral wall and have the tapping hole, four of Kong Gongwei is characterized in that tapping, two of one sides are symmetrical distribution, two tappings of one side hole is published in to be up and down on the terminal sidewall in the mouth of a river and arranges, last tapping hole is an angle of declination, and following tapping hole is a top rade, and cylindrical shell bottom in the mouth of a river is taper or circular arc.
Above-mentioned patent relaxes flow field disturbance in the crystallizer by alleviating stream strand to the impact of base shell, though can alleviate the surface velocity of crystallizer molten steel, shorten the floating foreign stroke, but also can only being used for the continuous casting tundish, this patent uses, different with the residing job specification that is used to pour into a mould conventional slab of the utility model.
In sum, single mouth of a river, four holes under the prior art is mainly used in sheet billet and the production of continuous casting tundish, and as can be known in conjunction with crystallizer interior flow field and characteristic analysis of temperature field, now need a kind of novel submersed nozzle, this mouth of a river needs to reduce the molten steel liquid fluctuating, and can reduce the impact of internal turbulence, and can guarantee certain steel-passing amount to solidified shell.
The utility model content
In order to address the above problem, the utility model is analyzed by flow field and temperature field to the submersed nozzle under the prior art, and optimal design again provides a kind of four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab.
Concrete structure of the present utility model is as described below:
A kind of four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab comprise mouth of a river body, it is characterized in that:
The upper end of described mouth of a river body is provided with a funnelform molten steel inflow entrance;
The main body of described mouth of a river body is the cylindrical tube of central through hole formula, is being respectively arranged with not the hole that spues under spue on a pair of molten steel at sustained height hole and a pair of molten steel on the tube wall of the bottom of the mouth of a river of this cylindrical tube body;
Body bottom, the mouth of a river bottom in the described mouth of a river is a closed state.
According to a kind of four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab of the present utility model, it is characterized in that the internal diameter of the lower end of described funnelform molten steel inflow entrance is identical with the internal diameter of the mouth of a river body of the cylindrical tube of central through hole.
Molten steel flows into from funnelform molten steel inflow entrance upper end during work, enters the mouth of a river body interior pipeline of connected cylindrical tube by the lower end of molten steel inflow entrance.
According to a kind of four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab of the present utility model, it is characterized in that, the described hole that under spue on a pair of molten steel of sustained height hole and a pair of molten steel, do not spue, be specially the hole that spues under spue on two molten steel hole and two molten steel and be penetration type facing each other respectively and distribute, and the hole that spues under the central point in the hole that spues on the molten steel of the same side and the molten steel the position of central point vertically be a straight line.
The design that penetration type facing each other distributes has reduced the static pressure that flows out molten steel, reduces the fluctuation of mold liquid level, and the central point in the hole that spues on the molten steel and the hole that spues down the position of central point vertically be the design of a straight line., guaranteed can meet in crystallizer inside when molten steel flows out, can dissipate through colliding laggard action, reduced the speed that molten steel flows, the bubble of avoiding molten steel to impact taking an advanced study is difficult to float with being mingled with.
According to a kind of four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab of the present utility model, it is characterized in that, spue on two of hole hole and the horizontal angle of spuing on the described a pair of molten steel is-15 ° to-45 ° of settings, spue under two of hole hole and the horizontal angle of spuing under a pair of molten steel is 15 ° to 45 ° settings, and the angle in the hole that spues of the same side is opposite.
Because the angle in two pairs of holes that spue is opposite, make molten steel when two pairs of orifice flows that spue go out, will inevitably meet in the crystallizer inside on the extended line of its angle, can dissipate through colliding laggard action, reduced the speed that molten steel flows, directly having reduced molten steel flows to the impact of crystallizer leptoprosopy, in addition can be according to different with the work on the spot situation of varying in size of crystallizer, the four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab of the present utility model that also can select different angle angles.
According to a kind of four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab of the present utility model, it is characterized in that, spue on the described a pair of molten steel spue under hole and a pair of molten steel four holes that spue in hole are the rectangular configuration formula design of band chamfering, and on the hole that spues be slightly larger than down the hole that spues.
Four holes that spue are the rectangular configuration formula design of band chamfering, and this kind design helps reducing the fluctuation of mold liquid level and guaranteed enough steel-passing amounts.And on the design that the hole is slightly larger than down the hole that spues that spues be because two Kong Youyi fixed differences in height that spue, the kinetic energy of the molten steel that two orifice flows that spue go out is also different, for the dissipation steel energy of flow as much as possible, obtain stable flow field of molten steel, the area in the hole that spues on therefore than under the hole area that spues big.The area in hole and the hole that spues down spue in addition than increasing along with the increase of immersing mouth of a river insertion depth.
The four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab of the present utility model; four big recirculating zone being involved in of conventional diplopore mouth of a river cast slab molten steel under the prior art have been solved to covering slag; field trash and bubble floating; and molten steel stream thigh is to the problem of the impact of solidified shell; and overcome in the conventional diplopore mouth of a river cast under the prior art the big and crystallizer bottom molten steel of liquid level fluctuation of crystallizer and impacted the dark various unfavorable factors of bringing, improved the surface and the internal soundness of strand.
Use the four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab of the present utility model, obtain following beneficial effect:
1. compare with the mouth of a river, two holes of conventional slab, the four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab of the present utility model have solved the upwards problem of molten steel stream strand kinetic energy, the stable mold liquid level that molten steel upwards forms, avoided the growth with the base shell of being involved in of covering slag, and the utility model can dissipate to the molten steel kinetic energy that flows out from submersed nozzle, reduce the turbulent flow of molten steel, the molten steel of stable crystalline device inside, form solidified shell more uniformly, the generation of lowering the strand crackle;
2. use the four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab of the present utility model, its downward molten steel stream thigh is subjected to having reduced downward energy to the impact of upper reaches thigh, there are not enough energy that bubble is taken to darker place with being mingled with, the come-up that also just has been beneficial to bubble and has been mingled with, their gatherings have been avoided in the casting blank solidification forward position, also just improved the internal soundness of strand, therefore adopt the mouth of a river, four holes to make molten steel more stable, thereby reduced a series of casting blank defect in crystallizer inside.
Description of drawings
Fig. 1 is the outward appearance concrete structure front view of four hole submersed nozzles of the anti-molten steel turbulent flow that is used to pour into a mould conventional slab of the present utility model;
Fig. 2 for four hole submersed nozzles of the anti-molten steel turbulent flow that is used to pour into a mould conventional slab of the present utility model along AA to the concrete structure cutaway view;
Fig. 3 is the sectional drawing of the mouth of a river main body of four hole submersed nozzles of the anti-molten steel turbulent flow that is used to pour into a mould conventional slab of the present utility model;
Among the figure: 1-mouth of a river body, 2-molten steel inflow entrance, the hole that spues on the 3-molten steel, the hole that spues under the 4-molten steel, bottom, the 5-mouth of a river, spue on the a-molten steel hole and horizontal angle, hole and horizontal angle spue under the b-molten steel.
The specific embodiment
Below in conjunction with drawings and Examples a kind of four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab of the present utility model are described further.
As depicted in figs. 1 and 2,, form and to solidify even base shell, reduce the slab quality defective, in conventional slab cast, adopted the four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab of the present utility model for flow field of molten steel in the stable crystalline device.The mouth of a river main body 1 of this four holes submersed nozzle is the cylindrical tube of central through hole formula, body bottom, the mouth of a river 5 bottom in the mouth of a river is a closed state, be respectively arranged with not the hole 4 that spues under spue on a pair of molten steel at sustained height hole 3 and a pair of molten steel on the tube wall of the bottom of the mouth of a river of this cylindrical tube body, being specially the hole that spues under spue on two molten steel hole and two molten steel is penetration type facing each other respectively and distributes, and the central point in the hole that spues on the molten steel of the same side and the hole that spues down the position of central point vertically be a straight line, each pore cross section rectangle that spues for the band chamfering.
Spue on the molten steel of the same side hole 4 that spues under hole 3 and the molten steel is designed to have certain included angle with horizontal line, and the angle in two holes that spue is relative, be specially spue on the molten steel hole and horizontal angle a and be-15 ° to-45 °, spue under the molten steel hole and horizontal angle b are 15 ° to 45 °.Spue the hole area with immerse mouth of a river body passageways area and have certain relation with the casting machine pulling rate, when pulling rate is higher, go out the hole that spues with higher speed for fear of molten steel, cause the vigorous agitation of the interior molten steel of crystallizer, the area in the hole that spues that must increase.And also there is certain difference in the area in two holes that spue of the same side.Because two Kong Youyi fixed differences in height that spue, the kinetic energy of the molten steel that two orifice flows that spue go out is also different, for the dissipation steel energy of flow as much as possible, obtain stable flow field of molten steel, therefore the area in hole of spuing on the molten steel is bigger than the hole area that spues under the molten steel, and on spue the area in hole and the hole that spues down than increasing along with the increase of immersing mouth of a river insertion depth.
Embodiment
At first, attach it to the position according to the four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab of the present utility model that immerse that mouth of a river body passageways area and casting machine pulling rate and mouth of a river insertion depth select suitable size.
As depicted in figs. 1 and 2, when carrying out slab cast work, molten steel flows into from the funnelform molten steel inflow entrance 2 of the upper end of four hole submersed nozzles of the anti-molten steel turbulent flow that is used to pour into a mould conventional slab of the present utility model, flow out from the hole 4 that spues under a pair of molten steel of below, the mouth of a river spues hole 3 and a pair of molten steel through the pipeline of main body 1 inside, the connected mouth of a river then, the direction of arrow among Fig. 2 is the molten steel flow direction, because the molten steel that two orifice flows that spue in the same side go out rushes at crystallizer (not shown) leptoprosopy with certain speed, because the inclination angle in two holes that spue is opposite, so two strands of molten steel can meet in crystallizer inside, can dissipate through colliding laggard action, reduced the speed of molten steel stream thigh, reduced burst the impact of molten steel stream the crystallizer leptoprosopy.The synthetic molten steel of two stream strand arrives two backflows that are divided into behind the crystallizer leptoprosopy up and down with lower speed.The fluctuation that backflow upwards arrives behind the mold liquid level also reduces thereupon, reduced being involved in of covering slag, and less liquid fluctuating also helps the even formation of nascent solidified shell, reduces the generation of crackle.And downward stream thigh has reduced the scope of time backflow greatly because of the reduction of speed, thereby helps bubble and floating foreign, has reduced the gathering at casting blank solidification forward position field trash.
Therefore adopt the four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab of the present utility model, reduced the turbulent flow of the inner molten steel of crystallizer from energy dissipation, increase the stable of liquid level, not only helped the formation of strand initial solidification shell, and reduced strand internal soundness defective.Be dissipated because of molten steel kinetic energy simultaneously, the washing away also of base shell of leptoprosopy reduced greatly, reduced the possibility that the crystallizer bleed-out, be beneficial to the stable of production from the hole that spues.
Four hole submersed nozzles of the anti-molten steel turbulent flow that is used to pour into a mould conventional slab of the present utility model are simple in structure, cost is lower, be applicable to the cast field of the conventional slab in various Ferrous Metallurgys field, reduce the inner molten steel turbulent flow of plate slab crystallizer and stablized the flow field, improved the quality of continuous casting billet.
Claims (5)
1. four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab comprise mouth of a river body (1), it is characterized in that:
The upper end of described mouth of a river body (1) is provided with a funnelform molten steel inflow entrance (2);
The main body of described mouth of a river body (1) is the cylindrical tube of central through hole formula, is being respectively arranged with not the hole (4) that spues under spue on a pair of molten steel at sustained height hole (3) and a pair of molten steel on the tube wall of the bottom of the mouth of a river of this cylindrical tube body;
Described mouth of a river body (1) bottom, the mouth of a river (5) bottom is a closed state.
2. a kind of four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab as claimed in claim 1, it is characterized in that the internal diameter of the lower end of described funnelform molten steel inflow entrance (2) is identical with the internal diameter of the mouth of a river body (1) of the cylindrical tube of central through hole.
3. a kind of four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab as claimed in claim 1, it is characterized in that, the described hole (4) that under spue on a pair of molten steel of sustained height hole (3) and a pair of molten steel, do not spue, be specially the hole that spues under spue on two molten steel hole and two molten steel and be penetration type facing each other respectively and distribute, and the hole that spues under the central point in the hole that spues on the molten steel of the same side and the molten steel the position of central point vertically be a straight line.
4. a kind of four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab as claimed in claim 3, it is characterized in that, spue on two of hole (3) hole and the horizontal angle (a) of spuing on the described a pair of molten steel is-15 ° to-45 ° of settings, spue under two of hole (4) hole and the horizontal angle (b) of spuing under a pair of molten steel is 15 ° to 45 ° settings, and the hole that spues on the same side is opposite with the angle in the hole that spues down.
5. a kind of four hole submersed nozzles that are used to pour into a mould the anti-molten steel turbulent flow of conventional slab as claimed in claim 3, it is characterized in that, spue on the described a pair of molten steel spue under hole (3) and a pair of molten steel four holes that spue in hole (4) are the rectangular configuration formula design of band chamfering, and on the hole that spues be slightly larger than down the hole that spues.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200330259U CN201603853U (en) | 2010-01-14 | 2010-01-14 | Quadripuntal submersed nozzle used for pouring conventional plate blank and preventing molten steel turbulence |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200330259U CN201603853U (en) | 2010-01-14 | 2010-01-14 | Quadripuntal submersed nozzle used for pouring conventional plate blank and preventing molten steel turbulence |
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| Publication Number | Publication Date |
|---|---|
| CN201603853U true CN201603853U (en) | 2010-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200330259U Expired - Fee Related CN201603853U (en) | 2010-01-14 | 2010-01-14 | Quadripuntal submersed nozzle used for pouring conventional plate blank and preventing molten steel turbulence |
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| CN (1) | CN201603853U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102950275A (en) * | 2012-10-16 | 2013-03-06 | 中冶南方工程技术有限公司 | Multi-hole continuous-casting submersed nozzle for square and round billets |
| CN103909256A (en) * | 2013-01-08 | 2014-07-09 | 宝山钢铁股份有限公司 | Porous submersed nozzle for pouring blooms |
-
2010
- 2010-01-14 CN CN2010200330259U patent/CN201603853U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102950275A (en) * | 2012-10-16 | 2013-03-06 | 中冶南方工程技术有限公司 | Multi-hole continuous-casting submersed nozzle for square and round billets |
| CN102950275B (en) * | 2012-10-16 | 2014-12-17 | 中冶南方工程技术有限公司 | Multi-hole continuous-casting submersed nozzle for square and round billets |
| CN103909256A (en) * | 2013-01-08 | 2014-07-09 | 宝山钢铁股份有限公司 | Porous submersed nozzle for pouring blooms |
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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: 20101013 Termination date: 20160114 |