CN201603868U - Slab continuous casting crystallizer submerged nozzle - Google Patents
Slab continuous casting crystallizer submerged nozzle Download PDFInfo
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- CN201603868U CN201603868U CN2010201168685U CN201020116868U CN201603868U CN 201603868 U CN201603868 U CN 201603868U CN 2010201168685 U CN2010201168685 U CN 2010201168685U CN 201020116868 U CN201020116868 U CN 201020116868U CN 201603868 U CN201603868 U CN 201603868U
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- submersed nozzle
- nozzle body
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Abstract
The utility model belongs to the technical field of slab continuous casting, and mainly relates to a slab continuous casting crystallizer submerged nozzle which comprises a submerged nozzle body, wherein nozzle lateral holes are symmetrically arranged at two sides of the bottom part of the submerged nozzle body; the upper ends of the nozzle lateral holes at the two sides of the submerged nozzle body are provided with feeding conduits; and the submerged nozzle body is integrated with the feeding conduits. In the submerged nozzle, the feeding conduits are used for feeding elastic steel strips or cored wires to the positions of the nozzle lateral holes so as to lead the fed elastic steel strips or cored wires to be quickly melted, and go far away from the nozzle lateral holes under the impact of high-speed molten steel, thus promoting the uniform distribution of trace elements in the molten steel, avoiding composition segregation defect of a continuous casting slab, and achieving the purpose of improving the internal quality of the continuous casting slab.
Description
Technical field
The utility model belongs to the sheet billet continuous casting technical field, relates generally to a kind of continuous casting crystallizer for plate billet submersed nozzle.
Background technology
In the continuous casting process of molten steel, submersed nozzle imports molten steel in the crystallizer by tundish, submersed nozzle is except having the effect that prevents molten steel oxidation, the more important thing is control and improve the flow regime of molten steel in the crystallization phase, reduce molten steel to the impact of solidified shell, the molten steel heat that disperses casting to go into, locate to make the base shell that in crystallizer, forms stable, evenly grow and locate into that field trash floats in the crystallization phase.
In the continuous casting, enter the high-temperature molten steel of crystallizer, so exist strong Turbulence Flow in the liquid metal that solidified shell surrounds owing to have very big kinetic energy.This uniformity that not only Temperature Distribution, solidification and heat transfer and shell thickness in volume slag, volume gas, the territory, liquid cave is distributed that flows all has material impact, the more important thing is directly and affect indirectly slab quality.In order to improve slab quality, need control crystallizer flow field and temperature field.Common control device is to carry out mouth of a river design.Except the mold gap design, the technology that another one is improved continuous casting billet quality is at crystallizer feeding rare earth bundle component wire or feeds steel band.Feeding rare earth bundle component wire technology is the requirement according to different steel grades and quality, add a certain amount of aluminium wire, rare-earth wires or certain alloy silk and carry out deoxidation, alloying and trimming etc., to improve the mechanical property of metallographic structure, control steel inclusion form, raising steel.The feeding rare earth bundle component wire has the rare earth yield height, can effectively improve sulphide inculsion form and distribution in the steel, improves the characteristics such as impact flexibility of steel, is to stabilize and increase product quality, the effective means of exploitation new steel grade.The feeding flexible strip can reduce the molten steel degree of supercooling in crystallizer, and the broken dendrite of the mechanical shock interaction energy of flexible strip increases the forming core core simultaneously, improves the continuous casting billet equiaxial crystal ratio jointly.
The feeding mode of existing rare earth bundle component wire and steel band is that the locus between submersed nozzle and mould at narrow side imports core-spun yarn and steel band.The rare earth bundle component wire and the feeding point of steel band in crystallizer that adopt this method to import exist the feeding point unstable, tie cold steel easily, destroy the molten steel flow field of crystallizer, simultaneously rare earth bundle component wire and steel band make the feeding point depart from the hole that spues, the mouth of a river easily owing to be subjected to the impact of side opening place, mouth of a river molten steel, make core-spun yarn or steel band melt the back and in crystallizer, form segregation easily, make and weaken the double refining effect by micro alloying element skewness on continuous casting billet structure.
How to be implemented in and effectively to add rare earth bundle component wire or steel band in the crystallizer, the flow field and the temperature field distribution that reach accurate control molten steel are technical barriers always.From crystallizer interior flow field and characteristic analysis of temperature field as can be known, be an approach that realizes effectively adding core-spun yarn or steel band by the design submersed nozzle.
The utility model content
The purpose of this utility model is to provide a kind of continuous casting crystallizer for plate billet submersed nozzle.This submersed nozzle is fixed on side opening position, the mouth of a river with the rare earth bundle component wire or the steel band of feeding, the rare earth bundle component wire of side opening position, the mouth of a river or steel band are heated, and the back is quick melts, diffusion rapidly under the percussion of high speed molten steel simultaneously, promote trace element in molten steel, evenly to distribute, avoid the component segregation of continuous casting slab defective, reach the purpose that improves the continuous casting billet internal soundness.
The utility model is achieved in that a kind of continuous casting crystallizer for plate billet submersed nozzle, comprise the submersed nozzle body, described submersed nozzle body two bottom sides symmetric arrangement has mouth of a river side opening, the upper end of the mouth of a river, described submersed nozzle body both sides side opening is provided with the feeding conduit, and submersed nozzle body and feeding catheter-shaped are integral.
The endoporus of described feeding conduit is circle, flat elliptic or rectangle.
The inlet of described feeding conduit is apart from mouth of a river side opening outlet 200～300mm, and the outlet of feeding conduit is apart from mouth of a river side opening outlet 20～100mm.
The utility model is by the feeding conduit being installed in submersed nozzle body both sides, being made the rare earth bundle component wire of feeding or steel band extend into side opening position, the mouth of a river along the feeding conduit.High-temperature molten steel is spued by mouth of a river side opening, enters crystallizer, the highest, the molten steel speed maximum of the liquid steel temperature at mouth of a river side opening place in crystallizer at a high speed; The rare earth bundle component wire of side opening position, the mouth of a river or steel band are heated, and the back is quick melts, diffusion rapidly under the percussion of high speed molten steel simultaneously.When the continuous casting billet hull shape became, the trace element of feeding crystallizer was evenly distributed in molten steel, has avoided the component segregation of continuous casting slab defective; The rare earth bundle component wire of feeding or steel band are owing to the heat that absorbs molten steel melts, impel the molten steel in mold temperature to reduce, the thermograde of liquid steel temperature field reduces, and Elements Diffusion is even in the molten steel, avoided the banded structure of steel band feeding, the continuous casting billet composition is even, equiaxial crystal ratio improves.
Description of drawings
Fig. 1 is the continuous casting crystallizer for plate billet submersed nozzle internal structure schematic diagram of the utility model embodiment 1;
Fig. 2 is that the A-A of Fig. 1 is to cutaway view;
Fig. 3 is the continuous casting crystallizer for plate billet submersed nozzle internal structure schematic diagram of the utility model embodiment 2;
Fig. 4 is that the B-B of Fig. 3 is to cutaway view.
Among the figure: 1 submersed nozzle body, 2 mouth of a river side openings, 3 feeding conduits.
The specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Shown in Fig. 1,2, a kind of continuous casting crystallizer for plate billet submersed nozzle, comprise submersed nozzle body 1, described submersed nozzle body 1 two bottom sides symmetric arrangement has mouth of a river side opening 2, the upper end of the mouth of a river, described submersed nozzle body 1 both sides side opening 2 is provided with feeding conduit 3, submersed nozzle body 1 forms one with feeding conduit 3, and the endoporus of described feeding conduit 3 is circular.
In carrying out 210 * 900mm sheet billet continuous casting production process, according to the continuous casting crystallizer for plate billet submersed nozzle shown in Fig. 1,2, having made feeding conduit 3 diameter of bores is the continuous casting crystallizer for plate billet submersed nozzle of Φ 35mm, the inlet of feeding conduit 3 is apart from mouth of a river side opening 2 outlet 200mm, and the outlet of feeding conduit 3 is apart from mouth of a river side opening 2 outlet 25mm.In the casting process, utilize this feeding conduit 3 to import rare earth bundle component wire.Core-spun yarn by 3 feedings of feeding conduit is positioned at mouth of a river side opening 2 positions, the liquid steel temperature of this position is higher, the rare earth bundle component wire burn-off rate is fast, the rare earth that melts under the high-speed steel water slug is evenly distributed in crystallizer, significantly improved the purification of molten steel effect, contain S field trash size and be refined to 0.15 μ m, do not occur cotton-shaped or banded being mingled with of group on the strand.
Shown in Fig. 3,4, a kind of continuous casting crystallizer for plate billet submersed nozzle, comprise submersed nozzle body 1, described submersed nozzle body 1 two bottom sides symmetric arrangement has mouth of a river side opening 2, the upper end of the mouth of a river, described submersed nozzle body 1 both sides side opening 2 is provided with feeding conduit 3, submersed nozzle body 1 forms one with feeding conduit 3, and the endoporus of described feeding conduit 3 is a flat elliptic.
In carrying out the sheet billet continuous casting production process of 70 * 900mm, according to the continuous casting crystallizer for plate billet submersed nozzle shown in Fig. 3,4, make feeding conduit 3 and be the flattened oval shape submersed nozzle, the inlet of feeding conduit 3 is apart from mouth of a river side opening 2 outlet 300mm, and the outlet of feeding conduit 3 is apart from mouth of a river side opening 2 outlet 100mm.In casting process, utilize continuous casting crystallizer for plate billet submersed nozzle of the present utility model, and cooperate the steel band import system successfully to feed the thick steel band of 4mm, fast by the steel band that this technology imports in crystallization thawing speed wherein, the strand composition is even, and equiaxial crystal ratio has improved 20%.
In conjunction with the accompanying drawings embodiment of the present utility model has been done detailed description above, but the utility model is not limited to the foregoing description, in the ken that those of ordinary skills possessed, can also under the prerequisite that does not break away from the utility model aim, make various variations.For example, feeding conduit 3 endoporus in the utility model also can adopt rectangle etc. other can realize the Any shape of its function.
Claims (3)
1. continuous casting crystallizer for plate billet submersed nozzle, comprise submersed nozzle body (1), described submersed nozzle body (1) two bottom sides symmetric arrangement has mouth of a river side opening (2), it is characterized in that: the upper end of described submersed nozzle body (1) mouth of a river, both sides side opening (2) is provided with feeding conduit (3), and submersed nozzle body (1) forms one with feeding conduit (3).
2. continuous casting crystallizer for plate billet submersed nozzle according to claim 1 is characterized in that: the endoporus of described feeding conduit (3) is circle, flat elliptic or rectangle.
3. continuous casting crystallizer for plate billet submersed nozzle according to claim 1 is characterized in that: the inlet of described feeding conduit (3) is apart from mouth of a river side opening (2) outlet 200～300mm, and the outlet of feeding conduit (3) is apart from mouth of a river side opening (2) outlet 20～100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201168685U CN201603868U (en) | 2010-02-23 | 2010-02-23 | Slab continuous casting crystallizer submerged nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201168685U CN201603868U (en) | 2010-02-23 | 2010-02-23 | Slab continuous casting crystallizer submerged nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201603868U true CN201603868U (en) | 2010-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201168685U Expired - Lifetime CN201603868U (en) | 2010-02-23 | 2010-02-23 | Slab continuous casting crystallizer submerged nozzle |
Country Status (1)
| Country | Link |
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| CN (1) | CN201603868U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211154A (en) * | 2011-05-11 | 2011-10-12 | 中冶南方工程技术有限公司 | Method for improving internal quality of continuous casting and submerged nozzle for implementing method |
| CN102430729A (en) * | 2011-11-15 | 2012-05-02 | 内蒙古包钢钢联股份有限公司 | Preparation method of refined steel continuous casting round billet crystal grains |
| CN105149536A (en) * | 2015-09-08 | 2015-12-16 | 东北大学 | Device and method for deslagging in steel strip feeding of gas shield continuous casting crystallizer |
| CN111790902A (en) * | 2020-06-22 | 2020-10-20 | 山东钢铁股份有限公司 | Straight-through type submerged nozzle and preparation method thereof |
| CN112122567A (en) * | 2020-09-07 | 2020-12-25 | 东北大学 | Method for improving solidification quality of casting blank by feeding stainless steel ladle core wire into crystallizer |
-
2010
- 2010-02-23 CN CN2010201168685U patent/CN201603868U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211154A (en) * | 2011-05-11 | 2011-10-12 | 中冶南方工程技术有限公司 | Method for improving internal quality of continuous casting and submerged nozzle for implementing method |
| CN102430729A (en) * | 2011-11-15 | 2012-05-02 | 内蒙古包钢钢联股份有限公司 | Preparation method of refined steel continuous casting round billet crystal grains |
| CN105149536A (en) * | 2015-09-08 | 2015-12-16 | 东北大学 | Device and method for deslagging in steel strip feeding of gas shield continuous casting crystallizer |
| CN111790902A (en) * | 2020-06-22 | 2020-10-20 | 山东钢铁股份有限公司 | Straight-through type submerged nozzle and preparation method thereof |
| CN112122567A (en) * | 2020-09-07 | 2020-12-25 | 东北大学 | Method for improving solidification quality of casting blank by feeding stainless steel ladle core wire into crystallizer |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101013 |
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| CX01 | Expiry of patent term |