CN202316999U - Immersed ladle long nozzle for preventing secondary oxidation of molten steel - Google Patents
Immersed ladle long nozzle for preventing secondary oxidation of molten steel Download PDFInfo
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- CN202316999U CN202316999U CN2011203467614U CN201120346761U CN202316999U CN 202316999 U CN202316999 U CN 202316999U CN 2011203467614 U CN2011203467614 U CN 2011203467614U CN 201120346761 U CN201120346761 U CN 201120346761U CN 202316999 U CN202316999 U CN 202316999U
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- secondary oxidation
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Abstract
The utility model discloses an immersed ladle long nozzle for preventing secondary oxidation of molten steel. The long nozzle comprises a nozzle body, a steel pouring passage of which two ends are open is longitudinally formed in the nozzle body, and the inside diameter of the steel pouring passage is a non-constant value. Compared with the conventional straight cylindrical steel pouring passage (2), the utility model has the advantages that the internal volume of the steel pouring passage (2) is increased, and reverse action of air is reduced. The nitrogen increasing quantity of the molten steel in a tundish is remarkably reduced from 20-50ppm to about 10-20ppm, and the long nozzle has long service life and completely meets the requirement of a steel plant for the nitrogen increasing quantity in the procedure.
Description
Technical field
The utility model relates to a kind of immersion ladle long nozzle of anti-secondary oxidation of steel.
Background technology
In the molten steel continuous casting process, if adopt protection, the beam that opens wide the casting ladle flows into tundish with certain speed, forms a negative pressuren zone at stream circumference, air all around is involved in beam brings the tundish molten bath into, causes secondary oxidation of steel.According to estimates, do not have the molten steel beam of protection to impact in the tundish molten bath, can cause that liquid steel level upgraded once in per 115 seconds in the tundish, to the tundish of a 1m * 5m surface area, this just means in the per minute that 260m is arranged
2New molten steel be exposed among the air, research shows, the protection casting is compared with not protecting casting, the secondary oxidation amount is 1/20.Can find out the importance of protection casting.
In present continuous casting technology; 100% slab is produced casting machine and has all been adopted the protection casting; 70% square billet casting machine has also all adopted the protection casting; Its protection domain (adopt aluminum-carbon long runner or say protective casing) from the ladle to the tundish is from the tundish to the crystallizer (submersed nozzle), in ladle, in the tundish and then adopt in the crystallizer and have high temperature melting and form diffusing shape coverture, covering slag with the air insulated layer function.This patent relates to and is used between ladle and the tundish long nozzle that the protection molten steel is avoided oxidation.Traditional long nozzle, as shown in Figure 1.The characteristics of this long nozzle are that internal diameter is roughly the same.Product in use, molten steel from top to bottom flows into tundish molten steel molten bath through internal diameter.The concrete step of using is: 1), ladle is by the external refining operation, is maneuvered into by overhead traveling crane on the ladle turret of conticaster in continuous casting workshop, and ladle rotated to waters directly over the steel position; 2), long nozzle is installed in ladle bottom slide gate nozzle bottom through manipulator; 3), open slide gate nozzle, just water flows out; 4), at last ladle vertically is displaced downwardly to the casting position, formal production.Note first, fourth step, in fact, when just water flows out; Long nozzle can not directly be put into molten steel, but above tundish molten steel molten bath, after molten steel flows out; Just slowly be displaced downwardly to tundish molten steel molten bath, this has its reason, and just water is by the moment of steel ladle sliding water gap position outflow; What flow out is not only molten steel itself, also has high temperature and the chromium matter, the siliceous or zirconium matter drainage sand that place the slide gate nozzle top up to more than 1500 degrees centigrade, these molten steel meeting Fast Heating ambient airs; Gather the air of heating, mixing can be as the free space impact of bomb to long nozzle with the high-temperature molten steel of the drainage sand of powdery and liquid, because of the product internal diameter the same; This rapid expansion can be found the weakest binding site: the junction of long nozzle and steel ladle sliding water gap, and wash connection open, can injure the site operation personnel when serious.
The utility model content
The purpose of the utility model is to provide a kind of immersion ladle long nozzle of anti-secondary oxidation of steel.
The purpose of the utility model can realize through following technical scheme:
A kind of immersion ladle long nozzle of anti-secondary oxidation of steel comprises nozzle body, and what vertically be provided with both ends open in the nozzle body waters the steel passage, and the said internal diameter that waters the steel passage is non-constant value.
The immersion ladle long nozzle of above-mentioned anti-secondary oxidation of steel, said bowl portion increase continuously downwards of watering the internal diameter of steel passage by nozzle body.
The immersion ladle long nozzle of above-mentioned anti-secondary oxidation of steel, said bottom, the steel passage bottom a certain segment distance internal diameter equivalent of watering increases.
The immersion ladle long nozzle of above-mentioned anti-secondary oxidation of steel, the said maximum inner diameter that waters the steel passage are 1.5～5 times of minimum diameter.Increase that to water the steel channel volume behind the internal diameter water the steel passage be 1.5～4 times of original volume.Described original volume is: watering the steel passage is the channel volume that channel diameter drew with the minimum diameter.
The immersion ladle long nozzle of above-mentioned anti-secondary oxidation of steel, the material of described nozzle body are aluminium carbon material.
The beneficial effect of the utility model:
This product has been counted tame steel plant at home and abroad and has been used, and effect is remarkable, and the nitrogen increased amount of molten steel is significantly reduced about 10-20ppm by original 20-50ppm in the tundish, and life of product is longer, has satisfied the requirement of steel plant to this operation nitrogen increased amount fully.
Description of drawings
Fig. 1 is the longitudinal sectional drawing of traditional long nozzle.
The longitudinal sectional drawing of the immersion ladle long nozzle of the anti-secondary oxidation of steel of Fig. 2 the utility model.
A is design 1; B is design 2; C is design 3.
The specific embodiment
A kind of immersion ladle long nozzle of anti-secondary oxidation of steel comprises nozzle body 1, and what vertically be provided with both ends open in the nozzle body 1 waters steel passage 2, and the said internal diameter that waters steel passage 2 is non-constant value.Said bowl portion increase (like Fig. 2 A) continuously downwards of watering the internal diameter of steel passage 2 by nozzle body 1.The perhaps said steel passage 2 bottoms a certain segment distance internal diameter equivalent of watering increases (like Fig. 2 B, Fig. 2 C).The said maximum inner diameter that waters steel passage 2 is 1.5～5 times of minimum diameter.Increase that to water steel passage 2 volumes behind the internal diameter water steel passage 2 be 1.5～4 times of original volume.The material of described nozzle body 1 is an aluminium carbon material.Described original volume is: with the minimum diameter that waters the steel passage is the channel volume that channel diameter was drawn.
More than design is watered the steel passage with traditional straight-tube shape and is compared, and has increased the volume that waters the steel channel interior, reduces the backward-acting of air.
Claims (5)
1. the immersion ladle long nozzle of an anti-secondary oxidation of steel comprises nozzle body (1), and what vertically be provided with both ends open in the nozzle body (1) waters steel passage (2), it is characterized in that the said internal diameter that waters steel passage (2) is non-constant value.
2. the immersion ladle long nozzle of anti-secondary oxidation of steel according to claim 1 is characterized in that said bowl portion increase continuously downwards of watering the internal diameter of steel passage (2) by nozzle body (1).
3. the immersion ladle long nozzle of anti-secondary oxidation of steel according to claim 1 and 2 is characterized in that the said maximum inner diameter that waters steel passage (2) is 1.5～5 times of minimum diameter.
4. the immersion ladle long nozzle of anti-secondary oxidation of steel according to claim 1 and 2 is characterized in that increasing that to water steel passage (2) volume behind the internal diameter that waters steel passage (2) be 1.5～4 times of original volume.
5. the immersion ladle long nozzle of anti-secondary oxidation of steel according to claim 1, the material that it is characterized in that described nozzle body (1) is an aluminium carbon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203467614U CN202316999U (en) | 2011-09-15 | 2011-09-15 | Immersed ladle long nozzle for preventing secondary oxidation of molten steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203467614U CN202316999U (en) | 2011-09-15 | 2011-09-15 | Immersed ladle long nozzle for preventing secondary oxidation of molten steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202316999U true CN202316999U (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203467614U Expired - Lifetime CN202316999U (en) | 2011-09-15 | 2011-09-15 | Immersed ladle long nozzle for preventing secondary oxidation of molten steel |
Country Status (1)
| Country | Link |
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| CN (1) | CN202316999U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105397079A (en) * | 2015-10-19 | 2016-03-16 | 山东钢铁股份有限公司 | Pouring stream protecting device for pouring molten steel through large ladle in continuous casting |
| CN106944609A (en) * | 2017-03-17 | 2017-07-14 | 华北理工大学 | A kind of outstanding flowing water mouthful and reduction molten steel are with being mingled with the method for corroding resistance to material |
| CN107755679A (en) * | 2017-12-07 | 2018-03-06 | 安徽工业大学 | The long nozzle device and argon jetting method of a kind of argon blowing seal and purifying of steel |
| CN109382506A (en) * | 2018-11-20 | 2019-02-26 | 山东钢铁股份有限公司 | A kind of method of molten steel nitrogen increased amount in reduction continuous casting process |
| CN110523964A (en) * | 2019-09-17 | 2019-12-03 | 山东钢铁股份有限公司 | A kind of premixed ladle long nozzle |
-
2011
- 2011-09-15 CN CN2011203467614U patent/CN202316999U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105397079A (en) * | 2015-10-19 | 2016-03-16 | 山东钢铁股份有限公司 | Pouring stream protecting device for pouring molten steel through large ladle in continuous casting |
| CN106944609A (en) * | 2017-03-17 | 2017-07-14 | 华北理工大学 | A kind of outstanding flowing water mouthful and reduction molten steel are with being mingled with the method for corroding resistance to material |
| CN107755679A (en) * | 2017-12-07 | 2018-03-06 | 安徽工业大学 | The long nozzle device and argon jetting method of a kind of argon blowing seal and purifying of steel |
| CN107755679B (en) * | 2017-12-07 | 2023-09-19 | 安徽工业大学 | Argon blowing sealing and molten steel cleaning long nozzle device and argon blowing method |
| CN109382506A (en) * | 2018-11-20 | 2019-02-26 | 山东钢铁股份有限公司 | A kind of method of molten steel nitrogen increased amount in reduction continuous casting process |
| CN110523964A (en) * | 2019-09-17 | 2019-12-03 | 山东钢铁股份有限公司 | A kind of premixed ladle long nozzle |
| CN110523964B (en) * | 2019-09-17 | 2024-08-27 | 山东钢铁股份有限公司 | Premixing ladle long nozzle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |