CN204413139U - A kind of submersed nozzle of high draw speed plate blank continuous casting - Google Patents
A kind of submersed nozzle of high draw speed plate blank continuous casting Download PDFInfo
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- CN204413139U CN204413139U CN201520044016.2U CN201520044016U CN204413139U CN 204413139 U CN204413139 U CN 204413139U CN 201520044016 U CN201520044016 U CN 201520044016U CN 204413139 U CN204413139 U CN 204413139U
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- submersed nozzle
- continuous casting
- nozzle body
- plate blank
- draw speed
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 57
- 238000009991 scouring Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 abstract description 36
- 239000010959 steel Substances 0.000 abstract description 36
- 238000005266 casting Methods 0.000 abstract description 26
- 239000007788 liquid Substances 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 12
- 239000002893 slag Substances 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000010813 municipal solid waste Substances 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
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- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 241000931705 Cicada Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Continuous Casting (AREA)
Abstract
The utility model relates to high draw speed plate blank continuous casting technical field, particularly relates to a kind of submersed nozzle of high draw speed plate blank continuous casting, comprises submersed nozzle body; Submersed nozzle body has an inner chamber; The entrance of submersed nozzle body is positioned at the top of submersed nozzle body; Inner chamber is concave ball surfaces in the position of the bottom of described submersed nozzle body; The sidewall of the submersed nozzle body near bottom is symmetrically arranged with two side openings; Side opening is downward-sloping on the inside of submersed nozzle body to the direction of outside.Utilize Spherical Bottom, after molten steel stream flows into described submersed nozzle, clash into the Spherical Bottom of described submersed nozzle and rebound, the molten steel stream after bounce-back can collide with down-wass, in collision process, molten steel have lost large energy, loss kinetic energy, utilizes the radian that Spherical Bottom has, can ensure that the stream stock that collision rift spues from side opening is smooth, reduce the fluctuation of high casting speed continuous casting mold liquid level, decrease the situation that slag occurs.
Description
Technical field
The utility model relates to high draw speed plate blank continuous casting technical field, particularly relates to a kind of submersed nozzle of high draw speed plate blank continuous casting.
Background technology
High casting speed continuous casting technology is the acme of Development of Continuous Casting Technique, and it needs each procedure close fit such as steel-making, refining, continuous casting and rolling, cooperates with each other.The advantage of this technology is mainly reflected in: high casting speed continuous casting technology can increase yield, boosts productivity, and reduces construction investment, the cost such as place takies, plant maintenance, manpower; High casting speed continuous casting technology can shorten the continuous casting time, and drives the shortening of steel-making, refining time, reduces molten steel temperature drop, reduces molten steel and is pushed up the time of slag oxidation, improve the cleanliness factor of molten steel; High casting speed continuous casting technology can drive steel-making and refining high efficiency, reduces Tapping Temperature of Bof, reduces converter and ladle refractory consumption, improves tundish work life.
Although high casting speed continuous casting technology has above-mentioned advantage; but; under high pulling rate, solidified shell is thinning; very easily there is bleed-out accident, and, compared with low pulling rate; the flowing of high casting speed continuous casting molten steel in mold becomes disorderly; liquid level fluctuation of crystallizer is violent, and large-sized crystallizer protecting residue is easily rolled in molten steel, thus strip defect appears in the surface that plate is rolled in formation.Therefore, MOLTEN STEEL FLOW in high casting speed continuous casting crystallizer how is controlled and liquid fluctuating improves the problem that pulling rate needs solution badly.
In casting process; connect tundish the refractory sleeve be inserted under crystallizer molten steel surface is called submersed nozzle, in sheet billet continuous casting, after the molten steel stream that submersed nozzle is outstanding clashes into leptoprosopy, be divided into two strands; namely; upper backflow and lower backflow, in high casting speed continuous casting, the unreasonable meeting of structural design of submersed nozzle causes degree of flowing through prosperity last time; thus; aggravation liquid level fluctuation of crystallizer, covering slag is rolled among molten steel, worsens the quality of rolling plate surface.Meanwhile, the substructure of submersed nozzle directly affects injection mode and the flow performance of molten steel in mold.
The bottom of existing submersed nozzle is generally flat or sunken bottom, and in high casting speed continuous casting process, liquid level fluctuation of crystallizer is excessive, easy slag.
Utility model content
The utility model embodiment, by providing a kind of submersed nozzle of high draw speed plate blank continuous casting, solves the problem that in prior art, high casting speed continuous casting liquid level fluctuation of crystallizer is excessive.
The utility model embodiment provides a kind of submersed nozzle of high draw speed plate blank continuous casting, comprises submersed nozzle body;
Described submersed nozzle body has an inner chamber;
The entrance of described submersed nozzle body is positioned at the top of described submersed nozzle body;
Described inner chamber is concave ball surfaces in the position of the bottom of described submersed nozzle body;
The sidewall of the described submersed nozzle body near described bottom is symmetrically arranged with two side openings;
Described side opening is downward-sloping on the inside of described submersed nozzle body to the direction of outside.
Preferably, the top of described submersed nozzle body conically.
Preferably, described sidewall is provided with resistance to scouring district, described resistance to scouring district is positioned at the side away from described bottom of described side opening.
Preferably, the inclination angle of described side opening on the direction of the axis perpendicular with described submersed nozzle body is 20 ° ~ 40 °.
Preferably, described side opening is rectangular on the surface of described sidewall.
Preferably, the length-width ratio of described rectangle is 1.2 ~ 1.4.
Preferably, four angles of described rectangle are arc-shaped.
One or more technical schemes in the utility model embodiment, at least have following technique effect or advantage:
Utilize the inner chamber of the submersed nozzle of high draw speed plate blank continuous casting in the concave ball surfaces structure at bottom position place, after molten steel stream flows into described submersed nozzle, clash into the Spherical Bottom of described submersed nozzle and rebound, molten steel stream after bounce-back can collide with down-wass, in collision process, molten steel have lost large energy, loss kinetic energy, utilize the radian that Spherical Bottom has, can ensure that the stream stock that collision rift spues from side opening is smooth, reduce the fluctuation of high casting speed continuous casting mold liquid level, decrease the situation that slag occurs.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the sectional front view of the submersed nozzle of high draw speed plate blank continuous casting in the utility model embodiment;
Fig. 2 is the cross sectional side view of the submersed nozzle of high draw speed plate blank continuous casting in the utility model embodiment;
Fig. 3 is the top view of the submersed nozzle of high draw speed plate blank continuous casting on A direction in the utility model embodiment;
Fig. 4 is the upward view of the submersed nozzle of high draw speed plate blank continuous casting in directionb in the utility model embodiment;
Fig. 5 is the top view of the submersed nozzle of high draw speed plate blank continuous casting on C direction in the utility model embodiment;
Fig. 6 is the top view of the submersed nozzle of high draw speed plate blank continuous casting on D direction in the utility model embodiment;
Fig. 7 is the schematic diagram of side opening 4 in the directione in the utility model embodiment.
Wherein, 1 is submersed nozzle body, and 2 is inner chamber, and 3 is concave ball surfaces, and 4 is side opening, and 41 is the inclination angle of side opening, and 5 is resistance to scouring district, and 6 is entrance.
Detailed description of the invention
In order to solve the problem that in prior art, high casting speed continuous casting liquid level fluctuation of crystallizer is excessive, the utility model embodiment provides a kind of submersed nozzle of high draw speed plate blank continuous casting, Spherical Bottom is utilized to work as after molten steel stream flows into described submersed nozzle, clash into the Spherical Bottom of described submersed nozzle and rebound, molten steel stream after bounce-back can collide with down-wass, in collision process, molten steel have lost large energy, loss kinetic energy, utilize the radian that Spherical Bottom has, can ensure that the stream stock that collision rift spues from side opening is smooth, reduce the fluctuation of high casting speed continuous casting mold liquid level, decrease the situation that slag occurs.
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The application provides a kind of submersed nozzle of high draw speed plate blank continuous casting, be applied to high draw speed plate blank continuous casting field, the pulling rate scope be suitable for is 1.6 ~ 3.0m/min, and the section scope of casting slab is (220 ~ 250) mm × (900 ~ 2150) mm.This submersed nozzle can reduce the fluctuation of high draw speed plate blank continuous casting mold liquid level.
As depicted in figs. 1 and 2, described submersed nozzle comprises submersed nozzle body 1, submersed nozzle body 1 has an inner chamber 2, the entrance 6 of submersed nozzle body 1 is positioned at the top of submersed nozzle body 1, inner chamber 2 is concave ball surfaces 3 in the position of the bottom of submersed nozzle body 1, wherein, the bottom of submersed nozzle body 1 is also referred to as base.The sidewall of the submersed nozzle body 1 near bottom is symmetrically arranged with two side openings 4, two side openings 4 lay respectively at the both sides of submersed nozzle body 1, each side opening 4 in two side openings 4 is downward-sloping on the inside of submersed nozzle body 1 to the direction of outside, and side opening 4 is for spuing for molten steel.
Different from the base shape of existing submersed nozzle, what the application adopted is Spherical Bottom, Spherical Bottom is utilized to make molten steel stream after the described submersed nozzle of inflow, clash into the bottom of described submersed nozzle and rebound, molten steel stream after bounce-back can collide with down-wass, wherein, down-wass is the molten steel stream of entrance 6 undershoot from submersed nozzle body 1.In collision process, molten steel have lost large energy, loss kinetic energy, utilize the radian that Spherical Bottom has, can ensure that the stream stock that collision rift spues from side opening 4 is smooth, reduce the fluctuation of high casting speed continuous casting mold liquid level, decrease the situation that slag occurs, also be beneficial to the homoepitaxial of molten steel kinetic energy even dissipation and solidified shell in crystallizer, prevent liquid level from crusting.
The application is foundation by hydraulic con-ceptual model and commerical test, demonstrates its reasonability, the submersed nozzle of the high draw speed plate blank continuous casting of the application and traditional mouth of a river is contrasted.Show in 1:1 water model result, under same process parameter, after using the described submersed nozzle of the application, liquid level fluctuation of crystallizer is 4.8mm, and after using submersed nozzle of the prior art, liquid level fluctuation of crystallizer is 7.2mm, uses the submersed nozzle of the high draw speed plate blank continuous casting of the application that liquid fluctuating can be made to reduce 33.3%.
Preferably, sidewall is also provided with resistance to scouring district 5, the main component in resistance to scouring district 5 is zirconia, and resistance to scouring district 5 is positioned at the side of the bottom away from submersed nozzle body 1 of side opening 4.This resistance to scouring district 5 for contacting with the covering slag of crystallizer, thus protects submersed nozzle, improves life-span and the casting sequence of submersed nozzle.
Preferably, the inclination angle 41 of side opening 4 on the direction of the axis perpendicular with submersed nozzle body 1 is 20 ° ~ 40 °, be compared with in the of 15 ° with inclination angle in prior art, inclination angle 41 in the application can reduce the intensity that molten steel refluxes, molten steel stream stock is moved downward, further reduces the fluctuation of high casting speed continuous casting mold liquid level.
Preferably, side opening 4 is rectangular on the surface of sidewall, and the length-width ratio of rectangle is 1.2 ~ 1.4, and four angles of rectangle are arc-shaped, and the radius of circular arc is 5mm.
Preferably, the top of submersed nozzle body 1 conically.
Provide the structural representation of the submersed nozzle of high draw speed plate blank continuous casting in different directions in the embodiment of the present application respectively, specifically as shown in fig. 3 to 7, wherein, Fig. 3 is the top view of described submersed nozzle on A direction in Fig. 1, Fig. 4 is the upward view of described submersed nozzle on B direction in Fig. 1, Fig. 5 is the top view of described submersed nozzle on C direction in Fig. 1, and Fig. 6 is the top view of described submersed nozzle on D direction in Fig. 1, and Fig. 7 is the schematic diagram of E direction upper-side hole 4.
Provide a specific embodiment below, be described in detail with the submersed nozzle of the high draw speed plate blank continuous casting to the application.
On the high casting speed continuous casting machine of certain steel mill, with the pulling rate of 2.4m/min casting SPHC steel grade, the Metal in Tundish degree of superheat is 10 DEG C, casting section is 1050mm × 247mm, the degree of depth of the described submersed nozzle insertion liquid level of the application is 170mm, and the inclination angle 41 of the side opening 4 of submersed nozzle body 1 is 20 °.When casting, molten steel enters from the entrance 6 on submersed nozzle body 1 top, rebound when arriving Spherical Bottom, collide with down-wass in bounce-back process, large losses energy, then spue from side opening 4, the molten steel stream spued is comparatively large due to energy loss, causes speed less, under the guide functions at side opening 4 inclination angle 41, molten steel flows to into crystallizer inside, forms dual reflux.Concrete, molten steel flows to and clashes into leptoprosopy into behind crystallizer inside, and wherein, part stream stock arrives meniscus place along leptoprosopy, and formation refluxes, and part stream stock arrives crystallizer bottom along leptoprosopy, forms lower backflow.Due to the structure of the submersed nozzle of the high draw speed plate blank continuous casting of the application, be in the high casting speed continuous casting of 2.4m/min at pulling rate, the liquid fluctuating of actual crystallizer can control at ± 2mm, prevent the generation of slag, utilize automatic scan Electronic Speculum to carry out large area analysis to the surface impurities of this operating mode continuous casting billet, the field trash being greater than 20 microns detected is all Al
2o
3field trash, does not detect covering slag field trash, illustrates and uses this submersed nozzle can effectively prevent being involved in of high casting speed continuous casting crystallizer protecting residue.
Technical scheme in above-mentioned the embodiment of the present application, at least has following technique effect or advantage:
Utilize the inner chamber of the submersed nozzle of high draw speed plate blank continuous casting in the concave ball surfaces structure at bottom position place, after molten steel stream flows into described submersed nozzle, clash into the Spherical Bottom of described submersed nozzle and rebound, molten steel stream after bounce-back can collide with down-wass, in collision process, molten steel have lost large energy, loss kinetic energy, utilize the radian that Spherical Bottom has, can ensure that the stream stock that collision rift spues from side opening is smooth, reduce the fluctuation of high casting speed continuous casting mold liquid level, decrease the situation that slag occurs.
Although described preferred embodiment of the present utility model, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the utility model scope.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.
Claims (7)
1. a submersed nozzle for high draw speed plate blank continuous casting, is characterized in that, comprises submersed nozzle body;
Described submersed nozzle body has an inner chamber;
The entrance of described submersed nozzle body is positioned at the top of described submersed nozzle body;
Described inner chamber is concave ball surfaces in the position of the bottom of described submersed nozzle body;
The sidewall of the described submersed nozzle body near described bottom is symmetrically arranged with two side openings;
Described side opening is downward-sloping on the inside of described submersed nozzle body to the direction of outside.
2. the submersed nozzle of high draw speed plate blank continuous casting as claimed in claim 1, it is characterized in that, the top of described submersed nozzle body conically.
3. the submersed nozzle of high draw speed plate blank continuous casting as claimed in claim 1, it is characterized in that, described sidewall is provided with resistance to scouring district, described resistance to scouring district is positioned at the side away from described bottom of described side opening.
4. the submersed nozzle of high draw speed plate blank continuous casting as claimed in claim 1, it is characterized in that, the inclination angle of described side opening on the direction of the axis perpendicular with described submersed nozzle body is 20 ° ~ 40 °.
5. the submersed nozzle of high draw speed plate blank continuous casting as claimed in claim 1, it is characterized in that, described side opening is rectangular on the surface of described sidewall.
6. the submersed nozzle of high draw speed plate blank continuous casting as claimed in claim 5, it is characterized in that, the length-width ratio of described rectangle is 1.2 ~ 1.4.
7. the submersed nozzle of high draw speed plate blank continuous casting as claimed in claim 5, it is characterized in that, four angles of described rectangle are arc-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520044016.2U CN204413139U (en) | 2015-01-22 | 2015-01-22 | A kind of submersed nozzle of high draw speed plate blank continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520044016.2U CN204413139U (en) | 2015-01-22 | 2015-01-22 | A kind of submersed nozzle of high draw speed plate blank continuous casting |
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| CN204413139U true CN204413139U (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520044016.2U Expired - Fee Related CN204413139U (en) | 2015-01-22 | 2015-01-22 | A kind of submersed nozzle of high draw speed plate blank continuous casting |
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| CN (1) | CN204413139U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033237A (en) * | 2015-09-11 | 2015-11-11 | 首钢总公司 | Submersed nozzle for slab continuous casting |
| CN108495727A (en) * | 2015-11-10 | 2018-09-04 | 维苏威美国公司 | Continuous casting sprue with baffle |
| CN115945678A (en) * | 2022-12-13 | 2023-04-11 | 包头钢铁（集团）有限责任公司 | Submerged nozzle for improving castability of rare earth steel and use method |
-
2015
- 2015-01-22 CN CN201520044016.2U patent/CN204413139U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033237A (en) * | 2015-09-11 | 2015-11-11 | 首钢总公司 | Submersed nozzle for slab continuous casting |
| CN108495727A (en) * | 2015-11-10 | 2018-09-04 | 维苏威美国公司 | Continuous casting sprue with baffle |
| US10500636B2 (en) | 2015-11-10 | 2019-12-10 | Vesuvius Usa Corporation | Casting nozzle comprising flow deflectors |
| CN115945678A (en) * | 2022-12-13 | 2023-04-11 | 包头钢铁（集团）有限责任公司 | Submerged nozzle for improving castability of rare earth steel and use method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: SHOUGANG GROUP Co.,Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: SHOUGANG Corp. |
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| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 |
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| CF01 | Termination of patent right due to non-payment of annual fee |