CN202539557U - 270-degree flat submersed nozzle with high steel flux for continuous casting rectangular billet - Google Patents
270-degree flat submersed nozzle with high steel flux for continuous casting rectangular billet Download PDFInfo
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- CN202539557U CN202539557U CN 201120540445 CN201120540445U CN202539557U CN 202539557 U CN202539557 U CN 202539557U CN 201120540445 CN201120540445 CN 201120540445 CN 201120540445 U CN201120540445 U CN 201120540445U CN 202539557 U CN202539557 U CN 202539557U
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- tapping hole
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- continuous casting
- submersed nozzle
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Abstract
A 270-degree flat submersed nozzle with a high steel flux for a continuous casting rectangular billet integrally comprises a molten steel inflow end 1, a middle connecting portion 2, a molten steel tapping hole end 3, a nozzle bottom flow stabilizing structure 4 and the like. The molten steel tapping hole end is provided with a symmetric flat tapping hole with a 270-degree opening angle, and the grooved flow stabilizing structure is arranged at the bottom of the nozzle. The symmetric flat tapping hole with the 270-degree opening angle is formed between the bottom and the side wall of the molten steel tapping hole end, a guide inclination angle theta ranging from 10 degrees to 20 degrees is formed between the upper end of the molten steel tapping hole and the horizontal direction, the maximum size L of the molten steel tapping hole end in the width direction ranges from 160mm to 200mm, the maximum size M of the bottom of the molten steel tapping hole in the width direction ranges from 120mm to 160mm, M/L ranges from 0.6 to 0.9, the thickness alpha of the bottom of the tapping hole end ranges from 20mm to 30mm, the size b of the tapping hole end in the length direction ranges from 50mm to 80mm, the maximum size N of the tapping hole end in the thickness direction ranges from 80mm to 120mm, and the nozzle bottom molten steel flow stabilizing structure 4 is a groove structure with the radius ranging from 10mm to 15mm.
Description
Technical field
The utility model relates to the submersed nozzle of the big steel-passing amount of a kind of continuous casting rectangle base 270 degree flat, is to belong to Ferrous Metallurgy to use the continuous casting functional technical field of refractory materials.
Background technology
The Ferrous Metallurgy continuous casting technology is difference and conventional die castings cast steel production technology; Wherein the water-cooled copper plate mould is called crystallizer; The submersed nozzle of being made by refractory material is connected crystallizer with tundish; Molten steel is continuously injected crystallizer through the water conservancy diversion transmission at the mouth of a river and is received water-cooled and solidification and crystallization in tundish, thereby forms strand.Submersed nozzle tapping hole end is designed to difformity according to the needs of different continuous casting billet types usually and in crystallizer, obtains good flow field and temperature field requirement to satisfy molten steel; And submersed nozzle molten steel input often is a tubular type; Molten steel input and tapping hole end are the cylindrical shells of a continuous transition; Sometimes submersed nozzle also can be divided into two sections, and the upper end is called filling pipe end at the bottom of being embedded in the tundish bag, and the molten steel input of lower end links to each other with filling pipe end; Tapping hole is inserted in the crystallizer, can in continuous casting steel machine production, be changed fast.
Different with typical sheet billet, generous slab, square billet and the production of circle base is; The continuous casting production of rectangular bloom is between slab and square billet; The typical slab that compares is narrow and thin; And the square billet that compares is than broad, and its typical slab thickness size is at 130-160mm, and width dimensions is between 400-600mm.Common way is to use the bilateral hole submersed nozzle (like Fig. 1) of slab or the clear opening submersed nozzle (like Fig. 2) of billet continuous casting at present
The inner ladle canal of submersed nozzle, tapping hole structure and angle, mouth of a river outer wall are the systems that formation one connects each other apart from the technical parameters such as distance of copper plate of crystallizer.Even the tapping hole end at the mouth of a river is processed into flat pattern; Its structure is parallel with the crystallizer width; Tapping hole brings out steel and flows to the crystallizer molten steel from the mouth of a river; The Flow Field Distribution of molten steel and temperature field distribute all can not reach the excellent metallurgical effect, can bigger influence all be arranged to the formation of being involved in of the eliminating of field trash, covering slag, solidified shell and strand microscopic crystalline tissue etc.
In addition, crystallizer protecting residue is a kind of powder that prevents secondary oxidation of steel, between molten steel and copper plate of crystallizer, plays simultaneously the effect of lubricant again, but its heat that need accept high-temperature molten steel and provide can melt and works.Crystallizer protecting residue can not fully melt as failing to receive the heat of carrying from high-temperature molten steel and be injected between molten steel and the crystallizer, causes the quality accident and the slab quality problem of crystallizer bleedout steel easily.Therefore, this can evenly be distributed on the top of crystallizer liquid steel level after bringing out steel from the submersed nozzle tapping hole with regard to requiring molten steel, so that molten steel distributes to good Flow Field Distribution and temperature field, fully melts at liquid steel level with the assurance covering slag.
And rectangular bloom is because of the distinguishing feature of itself and typical slab, square billet; Adopt the submersed nozzle (like Fig. 1) of traditional billet continuous casting like it with the clear opening structure; Molten steel has behind the tapping hole end of the mouth of a river directly to the jet characteristics, to crystallizer surface molten bath reverse reflux high-temperature molten steel very little, can't obtain good Flow Field Distribution and temperature field and distribute; Thereby can't promote inclusion floating to get rid of, also can't guarantee the abundant fusing of crystallizer protecting residue and the effect that strand microscopic crystalline tissue forms.
As use the submersed nozzle (like Fig. 2) of typical slab bilateral hole tapping hole structure; Molten steel is behind the jet of bilateral hole; Can not take into account even that near the crystallizer center line Flow Field Distribution and temperature field distributes, also can't reach the metallurgical effect of formation and the strand microscopic crystalline tissue etc. of being involved in of eliminating to field trash, covering slag, solidified shell.
Reason and problem based on above analysis; Realize that rectangular billet caster aspect design and exploitation submersed nozzle, needs to solve following three problems: at first, can only be to adopt the flat structure that can adapt to the rectangular bloom width for submersed nozzle tapping hole end effective choice; And the high-temperature molten steel that needs to guarantee jet can be partly refluxed to crystallizer top; Effectively promote the covering slag fusing, it can fully be injected between copper coin and the molten steel, obtain the good lubrication effect.Second; Submersed nozzle tapping hole end face should guarantee to satisfy the requirement of base type at width; Guarantee again to keep at a distance at thickness direction and copper plate of crystallizer, avoiding rolling up slag influences mouth of a river service life, must make that again high-temperature molten steel is evenly distributed at the crystallizer flow field.The 3rd, submersed nozzle tapping hole structure need guarantee that obtaining good flow field at the crystallizer position of center line behind the molten steel jet distributes with the temperature field, with the metallurgical effect of the eliminating that reaches the promotion field trash and strand microscopic crystalline tissue etc.
The utility model content
For solving the above-mentioned technical problem that exists, it is a kind of rational in infrastructure that the utility model provides, and makes simply, and obvious results is used for the submersed nozzle of the big steel-passing amount of continuous casting rectangle base 270 degree flat.
The technical scheme that its technical problem of solution of the utility model is adopted is:
The submersed nozzle of the big steel-passing amount of a kind of continuous casting rectangle base 270 degree flat is to divide 2 by molten steel inflow end 1, middle interconnecting piece, and four parts such as molten steel tapping hole end 3 and bottom, mouth of a river current stabilization structure 4 constitute an integral body.Molten steel flows into end and has a groove shape location structure; Molten steel tapping hole end is the structure that has 270 degree angle of release tapping holes of a flat strip of symmetry, and in bottom, the mouth of a river one fluted body current stabilization structure is set; Mid portion is one and flows into end by wide structure to narrow gradual change by the tapping hole end to molten steel.
Described molten steel flow into end for one have a bowl-shape position of locating slot shape structure cylindrical structure.
Described middle interconnecting piece branch is one and is flowed on the direction of end to molten steel by the tapping hole end, all is by wide structure to narrow flat gradual change at its formal structure and inner-cavity structure.
Form 270 degree angle of release flat tapping holes of a symmetry between the bottom of described molten steel tapping hole end and its sidewall; Molten steel tapping hole upper end forms a water conservancy diversion inclination angle theta with its horizontal direction, between 10 °-20 °; Molten steel tapping hole end width full-size be L between 160-200mm, molten steel tapping hole bottom width direction full-size be M between 120-160mm, and M/L is between 0.6-0.9; Tapping hole bottom portion gauge be a between 20-30mm, and tapping hole end lengthwise dimension b is between 50-80mm; Tapping hole end thickness direction full-size is that N is between 80-120mm; Bottom, mouth of a river molten steel current stabilization structure 4 is the groove structure of 10-15mm for radius.
The mouth of a river, bilateral hole of the novel more existing use of this experiment or the clear opening mouth of a river have following remarkable technical advantage:
(1) thus the flat tapping hole bottom of symmetric design has formed 270 degree outlet angle of releases less than mouth of a river Breadth Maximum; Can obtain big steel-passing amount; High-temperature molten steel is in the even distribution on crystallizer top; Can effectively avoid the low problem of high temp jet molten steel central temperature high both sides temperature at the clear opening mouth of a river, also can avoid high temp jet molten steel both sides temperature high central temperature in the mouth of a river, bilateral hole to hang down problem.
(2) the water conservancy diversion inclination angle theta at tapping hole position; And bottom, mouth of a river molten steel current stabilization structure 4; Can effectively regulate and promote the backflow of high-temperature molten steel in crystallizer, promote that inclusion floating is got rid of, the metallurgical effect of the formation of being involved in of covering slag, solidified shell and strand microscopic crystalline tissue etc.
(3) the M tapping hole Breadth Maximum L that compares in tapping hole bottom is little, and M/L can effectively improve Flow Field Distribution and the temperature field of molten steel in crystallizer and distribute between 0.6-0.9.
Description of drawings
Accompanying drawing 1 is existing clear opening submersed nozzle;
Accompanying drawing 2 is existing bilateral hole submersed nozzles;
Accompanying drawing 3 is the utility model structural representations;
Accompanying drawing 4 is the utility model side views;
Accompanying drawing 5 is the utility model A-A transverse cross-sectional view;
Accompanying drawing 6 is the utility model B-B transverse cross-sectional view;
Accompanying drawing 7 is the utility model C-C transverse cross-sectional view.
The specific embodiment
Embodiment 1:
The submersed nozzle of the big steel-passing amount of a kind of continuous casting rectangle base 270 degree flat is to divide 2 by molten steel inflow end 1, middle interconnecting piece, and four parts such as molten steel tapping hole end 3 and bottom, mouth of a river current stabilization structure 4 constitute an integral body.Wherein, molten steel tapping hole end has 270 degree angle of release flat tapping holes of a symmetric design, and mouth of a river polycrystalline substance 4 is a fluted body current stabilization structure.
Described molten steel flows into end 1 for the bowl bit strip has the bowl portion structure with locating slot, and molten steel tapping hole end 3 is for having 270 degree angle of release flat structures, and middle interconnecting piece divides 2 to be that its formal structure and inner-cavity structure all are by wide structure to narrow flat gradual change.
The outlet upper edge of described molten steel tapping hole end and its horizontal direction form a water conservancy diversion inclination angle theta, and θ is 10 °; Molten steel tapping hole end width full-size be L at 160mm, molten steel tapping hole bottom portion width full-size be M at 120mm, and M/L is 0.75; Tapping hole bottom portion gauge be a at 20mm, and tapping hole end lengthwise dimension b is at 65mm; Tapping hole end thickness direction full-size is that N is at 80mm; Bottom, mouth of a river molten steel current stabilization structure 4, radius is 10mm.
Embodiment 2:
Structure is identical in instance 1, and its difference is, tapping hole upper edge water conservancy diversion inclination angle theta, and θ is 15 °; Molten steel tapping hole end width full-size be L at 180mm, molten steel tapping hole bottom portion width full-size be M at 140mm, and M/L is 0.78; Tapping hole bottom portion gauge be a at 25mm, and tapping hole end lengthwise dimension b is between 75mm; Tapping hole end thickness direction full-size is that N is between 90mm; Bottom, mouth of a river molten steel current stabilization structure 4, radius is 15mm.
Claims (4)
1. the submersed nozzle of the big steel-passing amount of continuous casting rectangle base 270 degree flat is to flow into end (1), middle interconnecting piece branch (2) by molten steel, and molten steel tapping hole end (3) and bottom, mouth of a river current stabilization structure (4) four parts constitute an integral body; Wherein, molten steel tapping hole end has 270 degree angle of release flat tapping holes of a pair of symmetric design.
2. the submersed nozzle of the big steel-passing amount of continuous casting rectangle base 270 degree flat as claimed in claim 1 is characterized in that molten steel flows into end bowl portion and has a groove shape location structure.
3. the submersed nozzle of the big steel-passing amount of continuous casting rectangle base 270 degree flat as claimed in claim 1 is characterized in that molten steel tapping hole upper end forms a water conservancy diversion inclination angle theta with its horizontal direction, between 10 °-20 °; Molten steel tapping hole end width full-size be L between 160-200mm, molten steel tapping hole bottom portion width full-size be M between 120-160mm, and M/L is between 0.6-0.9; Tapping hole bottom portion gauge be a between 20-30mm, and tapping hole end lengthwise dimension b is between 50-80mm; Tapping hole end thickness direction full-size is that N is between 80-120mm.
4. the submersed nozzle of the big steel-passing amount of a continuous casting rectangle base 270 degree flat, its bottom, mouth of a river is provided with molten steel current stabilization structure (4), it is characterized in that bottom, mouth of a river current stabilization structure is the groove type structure of radius 10-15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120540445 CN202539557U (en) | 2011-12-15 | 2011-12-15 | 270-degree flat submersed nozzle with high steel flux for continuous casting rectangular billet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120540445 CN202539557U (en) | 2011-12-15 | 2011-12-15 | 270-degree flat submersed nozzle with high steel flux for continuous casting rectangular billet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202539557U true CN202539557U (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120540445 Expired - Fee Related CN202539557U (en) | 2011-12-15 | 2011-12-15 | 270-degree flat submersed nozzle with high steel flux for continuous casting rectangular billet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202539557U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103231048A (en) * | 2013-05-17 | 2013-08-07 | 辽宁科技大学 | Four-hole submerged nozzle for high-casting-speed flexible thin slab caster (FTSC) crystallizer |
| CN108495727A (en) * | 2015-11-10 | 2018-09-04 | 维苏威美国公司 | Continuous casting sprue with baffle |
-
2011
- 2011-12-15 CN CN 201120540445 patent/CN202539557U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103231048A (en) * | 2013-05-17 | 2013-08-07 | 辽宁科技大学 | Four-hole submerged nozzle for high-casting-speed flexible thin slab caster (FTSC) crystallizer |
| CN103231048B (en) * | 2013-05-17 | 2015-08-12 | 辽宁科技大学 | High pulling rate FTSC crystallizer for continuous casting of thin slabs four cellular type submersed nozzles |
| 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 |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20181215 |