CN203804211U - Novel submerged nozzle for continuous casting of ultra-wide section slabs - Google Patents
Novel submerged nozzle for continuous casting of ultra-wide section slabs Download PDFInfo
- Publication number
- CN203804211U CN203804211U CN201420240404.3U CN201420240404U CN203804211U CN 203804211 U CN203804211 U CN 203804211U CN 201420240404 U CN201420240404 U CN 201420240404U CN 203804211 U CN203804211 U CN 203804211U
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- Prior art keywords
- tapping hole
- auxiliary
- main tapping
- main
- continuous casting
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 17
- 238000010079 rubber tapping Methods 0.000 claims abstract description 60
- 230000007704 transition Effects 0.000 claims description 4
- 210000001364 upper extremity Anatomy 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 13
- 239000010959 steel Substances 0.000 abstract description 13
- 239000002893 slag Substances 0.000 abstract description 6
- 238000003756 stirring Methods 0.000 abstract description 4
- 239000011819 refractory material Substances 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- 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 a novel submerged nozzle for continuous casting of ultra-wide section slabs and belongs to refractory materials for continuous casting. The novel submerged nozzle comprises a bowl opening (1), a body (2), an inner cavity (3), a main tapping hole (4), and an auxiliary tapping hole (5). The main tapping hole (4) and the auxiliary tapping hole (5) are arranged at the tapping hole part of the submerged nozzle on two sides of the wide-section direction. The main tapping hole (4) inclines at an angle alpha in the horizontal direction. An upper edge (41) of the main tapping hole and a lower edge (42) of the main tapping hole are parallel. The auxiliary tapping hole (5) starts from the lower edge (42) of the main tapping hole and vertically downwardly extends to the bottom of the nozzle. The inward depth, in the horizontal direction, of the auxiliary tapping hole (4) is 30-60mm; the concave surface of the auxiliary tapping hole (4) is a semicircular arc surface. Owing to the auxiliary tapping hole (5), flow from the main tapping hole (4) can be divided, molten steel in a crystallizer experiences less stirring and surface fluctuation, less slag is entrapped, and blank quality is improved effectively.
Description
Technical field
The utility model belongs to continuous casting functional refractory, relates generally to a kind of novel super wide section submerged nozzle for slab continuous casting.
Background technology
Late 1990s, in National Key Research Programs task, proposition will realize the high efficiency of continuous casting, i.e. " high efficiency continuous casting "." high efficiency continuous casting " for the raising of steel quality, research of technique is carried out in the optimization improvement of the improvement of the structure of crystallizer and the raising of the capacity of heat transmission, casting process and the performance raising of crystallizer protecting residue etc.This time tackling key problem, makes slab continuous casting effective transformation be able to promote in the whole nation.
Along with the raising that market requires slab quality, as Cleanliness of Molten Steel, slab quality being had to the crystallizer of material impact, its internal steel water flow field becomes the focus that people pay close attention to gradually.The formation of casting blank defect derives from crystallizer slag to a great extent, and the formation of slag is closely connected with interior flow field with liquid level fluctuation of crystallizer.Present stage research shows, pulling rate, the submersed nozzle degree of depth, tapping hole angle, crystallizer width and tapping hole air-blowing quantity stir and all can produce certain impact crystallizer top layer liquid fluctuating, internal steel stream.Result of study demonstration, along with the increase of crystallizer width, crystallizer protecting residue-molten steel interface fluctuation significantly increases, and is easy to slag, causes casting blank defect.Within the specific limits, along with the increase of tapping hole downtilt angles, crystallizer molten steel surface fluctuation reduces gradually.Along with the increase of super wide section slab market demand, super wide section slab is needed a kind of submersed nozzle that its continuous casting is produced that is adapted to badly.
Utility model content
Technical problem to be solved in the utility model is, overcoming in existing super wide section submerged nozzle for slab continuous casting casting process molten steel, to flow out tapping hole flow velocity excessive, a difficult problem that causes crystallizer interior steel stream stirring and steel liquid fluctuating, by the improvement to super wide submerged nozzle for slab continuous casting tapping hole portion structure, improve crystallizer inside and surface flow field, reduce slag, reduce casting blank defect, thereby be more applicable for the continuous casting production of super wide section slab.
The problem existing in order to solve prior art, the utility model is achieved through the following technical solutions: in tapping hole position, the wide section direction of submersed nozzle both sides, be respectively symmetrically distributed with a main tapping hole (4) and an auxiliary tapping hole (5).Main tapping hole (4) cross section is rectangle like, and the circular arc that adjacent both sides are R by radius carries out transition and linkage, and R is 30 ~ 50mm.Main tapping hole (4) inclination alpha downward with respect to horizontal direction is 0 ~ 30 degree, and main tapping hole upper limb (41) is parallel with main tapping hole lower edge (42).The inner concave of auxiliary tapping hole (5) is semicircle cambered surface, and auxiliary tapping hole (5) is from main tapping hole lower edge (42), extends to vertically downward bottom, the mouth of a river.The inside degree of depth of auxiliary tapping hole (5) along continuous straight runs is 30 ~ 60mm.
Submersed nozzle after improvement, existence due to auxiliary tapping hole, the steel stream that a part flows out from main tapping hole trickles vertically downward along auxiliary tapping hole, play the effect of differentiation steel stream stream thigh, uniform flow field, having reduced the inner molten steel of crystallizer stirs and liquid fluctuating, reduced slag, improved slab quality, the continuous casting that is applicable to super wide section slab is produced.
Accompanying drawing explanation
Fig. 1 is the sectional side elevation of the wide section direction of the utility model.
Fig. 2 is the sectional side elevation of the wide section direction in the utility model tapping hole position.
Fig. 3 is the A-A cutaway view of Fig. 2.
Fig. 4 is the B-B cutaway view of Fig. 2.
Fig. 5 is main tapping hole sectional view.
In figure, 1, the rim of a bowl, 2, body, 3, inner chamber, 4, main tapping hole, 41, main tapping hole upper limb, 42, main tapping hole lower edge, 5, auxiliary tapping hole, α is main tapping hole (4) inclination angle downward with respect to horizontal direction, R is the radius of main tapping hole (4) section transitions circular arc.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
A novel super wide section submerged nozzle for slab continuous casting, is comprised of the rim of a bowl (1), body (2), inner chamber (3), main tapping hole (4) and auxiliary tapping hole (5) five parts.
Main tapping hole (4) cross section is rectangle like, and inclination alpha is 20 degree, and main tapping hole upper limb (41) is parallel with main tapping hole lower edge (42).Main tapping hole (4) section transitions arc radius is 45mm.The inside degree of depth of auxiliary tapping hole (5) along continuous straight runs is 50mm, originates in main tapping hole lower edge (41), extend to vertically downward bottom, the mouth of a river, and its inner concave is semicircle cambered surface.
Claims (1)
1. a novel super wide section submerged nozzle for slab continuous casting, it is characterized in that: in tapping hole position, the wide section direction of submersed nozzle both sides, respectively be symmetrically distributed with a main tapping hole (4) and an auxiliary tapping hole (5), main tapping hole (4) cross section is rectangle like, the circular arc that adjacent both sides are R by radius carries out transition and linkage, R is 30 ~ 50mm, main tapping hole (4) inclination alpha downward with respect to horizontal direction is 0 ~ 30 degree, and main tapping hole upper limb (41) is parallel with main tapping hole lower edge (42), the inner concave of auxiliary tapping hole (5) is semicircle cambered surface, and auxiliary tapping hole (5) is from main tapping hole lower edge (42), extend to vertically downward bottom, the mouth of a river, the inside degree of depth of auxiliary tapping hole (5) along continuous straight runs is 30 ~ 60mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420240404.3U CN203804211U (en) | 2014-05-13 | 2014-05-13 | Novel submerged nozzle for continuous casting of ultra-wide section slabs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420240404.3U CN203804211U (en) | 2014-05-13 | 2014-05-13 | Novel submerged nozzle for continuous casting of ultra-wide section slabs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203804211U true CN203804211U (en) | 2014-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420240404.3U Expired - Lifetime CN203804211U (en) | 2014-05-13 | 2014-05-13 | Novel submerged nozzle for continuous casting of ultra-wide section slabs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203804211U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112643007A (en) * | 2020-11-23 | 2021-04-13 | 首钢集团有限公司 | Continuous casting method for reducing large-size inclusions on surface layer of aluminum-containing steel casting blank |
-
2014
- 2014-05-13 CN CN201420240404.3U patent/CN203804211U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112643007A (en) * | 2020-11-23 | 2021-04-13 | 首钢集团有限公司 | Continuous casting method for reducing large-size inclusions on surface layer of aluminum-containing steel casting blank |
| CN112643007B (en) * | 2020-11-23 | 2022-05-20 | 首钢集团有限公司 | Continuous casting method for reducing large-size impurities on surface layer of aluminum-containing steel casting blank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266201 No. 1, Zhengwang Road, Jimo environmental protection industrial park, Qingdao, Shandong Patentee after: Qingdao Zhengwang Material Co.,Ltd. Address before: 266201 No. 1, Zhengwang Road, Jimo environmental protection industrial park, Qingdao, Shandong Patentee before: QINGDAO HIWORLD MOLTEN STEEL CONTROL CO.,LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140903 |