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
- Publication number
- 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
- Authority
- CN
- China
- Prior art keywords
- steel
- molten steel
- secondary oxidation
- ladle
- preventing secondary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 66
- 239000010959 steel Substances 0.000 title claims abstract description 66
- 230000003647 oxidation Effects 0.000 title claims abstract description 20
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 20
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 230000002441 reversible effect Effects 0.000 abstract 1
- 238000007654 immersion Methods 0.000 description 10
- 238000005266 casting Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000003643 water by type Substances 0.000 description 8
- 238000009749 continuous casting Methods 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000476 body water Anatomy 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Continuous Casting (AREA)
Abstract
本实用新型公开了一种防钢水二次氧化的浸入式钢包长水口，包括水口体，水口体内纵向设有两端开放的浇钢通道，所述的浇钢通道内径为非恒定值。以上设计与传统的直筒状浇钢通道（2）相比，增加了浇钢通道（2）内部的体积，减少空气的逆向作用。中间包内钢水的增氮量由原来的20-50ppm显著降低10-20ppm左右，且产品寿命较长，完全满足了钢铁厂对该工序增氮量的要求。
The utility model discloses a submerged ladle long nozzle for preventing secondary oxidation of molten steel, which comprises a nozzle body, and a steel pouring channel open at both ends is longitudinally arranged in the nozzle body, and the inner diameter of the steel pouring channel is a non-constant value. Compared with the traditional straight steel pouring channel (2), the above design increases the internal volume of the steel pouring channel (2) and reduces the reverse effect of air. The nitrogen addition amount of molten steel in the tundish is significantly reduced by about 10-20ppm from the original 20-50ppm, and the product life is longer, which fully meets the requirements of the iron and steel plant for the nitrogen addition amount of the process.
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)
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 |
Family
ID=46428996
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 |
|---|---|
| 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 |