CN204052883U - One side, round billet continuous casting heat dissipation submersed nozzle - Google Patents
One side, round billet continuous casting heat dissipation submersed nozzle Download PDFInfo
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- CN204052883U CN204052883U CN201420446291.2U CN201420446291U CN204052883U CN 204052883 U CN204052883 U CN 204052883U CN 201420446291 U CN201420446291 U CN 201420446291U CN 204052883 U CN204052883 U CN 204052883U
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- mouth
- river
- side opening
- heat dissipation
- endoporus
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Abstract
The utility model relates to one side, round billet continuous casting heat dissipation submersed nozzle, comprise mouth of a river body, slag line layer, mouth of a river endoporus and mouth of a river side opening, above-mentioned mouth of a river side opening is circumferentially evenly distributed with four at mouth of a river endoporus, mouth of a river side opening is expanding and is certain tilt angle alpha with horizontal direction, α value is within the scope of 10 ° ~ 25 °, side opening inwall is arbitrary radial section of mouth of a river endoporus, between side opening outer wall and the radial section formed at mouth of a river endoporus boundary line circumferentially and axis, the mouth of a river by it in obtuse angle, obtuse angle angular range is 120 ° ~ 135 °, angular range between side opening inwall and side opening outer wall is 10 ~ 25 °, angular range between side opening inwall and the radial section formed at mouth of a river endoporus boundary line circumferentially and axis, the mouth of a river by side opening outer wall is 50 ° ~ 75 °.This mouth of a river has applied widely, and structure is simple, is easy to processing, be beneficial to molten steel and cross heat dissipation, the generation of Biased flow phenomenon in effective anti-waterstop port, promotes the collision of field trash, gathering, floating and removal, stabilized steel liquid level, activation meniscus and reduce production cost etc. feature.
Description
Technical field
The utility model belongs to continuous casting technology field, relates to one side, round billet continuous casting heat dissipation submersed nozzle.
Background technology
In continuous casting production process, center segregation of casting blank and adjoint loose and shrinkage cavity thereof are the bottlenecks limiting the upgrading of its product quality always, particularly for high-carbon, high alloy steel grade, as ball-bearing steel, rigid line steel, mould steel etc.For controlling and improving Inner Quality of Billet, control measure conventional at present mainly comprise: Prepared by Low Superheat Pouring technology, electromagnetic agitating technology, soft reduction technique, continuously FMT and the strong refrigeration technique of end etc.Wherein, for side, circle base steel alloy casting cycle, low overheat casting technique be improve center segregation of casting blank and loose be one of the most frequently used important channel.
For low overheat casting technique, the most direct method reduces large Baogang liquid temp exactly, but the method is unfavorable for floating and the removal of Tundish inclusion, and easily causes the generation of nozzle blocking.For indirect method, there is applicant to apply for and be called the patent of invention of " a kind of electromagnetic eddy flow downspout " (patent No. 200510047290) and the utility model patent of " a kind of continuous casting electromagnetic eddy flow downspout " (patent No. 201320125720.1) by name; The patented product is characterized as and applies at least one rotating excitation field in the outside of submersed nozzle, to obtain eddy flow state in inside, the mouth of a river, and then reaches the metallurgical effect of heat dissipation.But the enforcement of this technology need be transformed existing continuous casting operation platform, as the spacing of tundish and crystallizer need be adjusted so that installation and maintenance, fixture also need be added with Motionless electromagnetic device etc. on existing equipment; In addition, the equipment Service Environment that this increases is hot conditions, and its type of cooling easily causes potential safety hazard.
For this reason, in current continuous casting production process, many employing through type mouths of a river add M-EMS technology (patent No. is CN2003229279) and indirectly obtain low overheat casting technique, but, M-EMS apparatus expensive, and its installation, routine use and maintenance cost are higher.
For reducing production cost, had applicant the to apply for utility model patent of by name " a kind of continuous casting immersion eddy flow downspout " (patent No. is CN201220072913.0), the patented product is characterized as and has helical form chute on submersed nozzle inwall, to obtain eddy flow in inside, the mouth of a river and to cross heat dissipation effect.But in production process, rough mouth of a river inwall will easily cause the generation of nozzle blocking, is unfavorable for production direct motion; In addition, compared with electromagnetic agitating technology, this technology only can produce eddy flow in inside, the mouth of a river, crosses heat dissipation effect poor.
Had applicant to apply for patent is called " submersed nozzle with Stirring effect " (patent No. is CN03215867.X) utility model.The patented product is characterized as has the equally distributed side opening of at least two or more, side opening with circumferentially there is certain angle at mouth of a river body, and side opening line or a face and mouth of a river endoporus tangent, but, this product in casting side, circle base time, because mouth of a river side opening is through-type, its stream stock may aggravate the corrosion to impacting initial solidification shell in regional extent, and then cause initial solidification shell inhomogeneities in the circumferential, add slab surface crack and bleedout accident odds.In addition, when being mouth of a river casting square billet or the rectangular bloom of 2 or 3 when adopting side opening number disclosed in this patent, effective level rotary flow cannot be formed in crystallizer, and the side opening stream stock with certain degree of superheat will be caused to fling to crystallizer folding corner region, easily cause the generation of the accidents such as strand corner crack, bleedout; When being mouth of a river casting square billet or the rectangular bloom of 4 when adopting side opening number, due to the tangent feature of side opening and mouth of a river endoporus, it will cause angulation between adjacent side opening to be the resistance to material region of acute angle or circumferentially produce the less resistance to material region of arc length at mouth of a river endoporus, easily cause the generation of nozzle blocking and Biased flow phenomenon, be unfavorable for the raising of production direct motion and initial solidification shell uniformity, and concrete application conditions, implementation method and the scope of application under this operating mode is all not yet clear and definite in the patent; When mouth of a river side opening number is greater than 4, its processing difficulties, and along with the increase of side opening number, for ensureing necessarily portal area ratio (side opening cross-sectional area sum and mouth of a river mesopore area ratio, generally get 2 ~ 2.3), because middle hole area is constant, single side opening cross-sectional area can constantly reduce, this is by easily causing the generation of nozzle blocking, namely without practical value; Similarly, also there is above-mentioned weak point in patent of invention " submersed nozzle " (patent No. is CN201180032653.2) by name.
Utility model content
In order to overcome the above-mentioned shortcoming of prior art
,the utility model provides one side, round billet continuous casting heat dissipation submersed nozzle, the initial solidification shell circumferential asymmetry Biased flow phenomenon that is even, that caused by the acute angle feature in material region resistance between adjacent side opening that what it can overcome and avoid existing eddy flow downspout to exist in casting cycle easily blocks, cause because of side opening jet impulse and the scope of application thereof and the deficiency such as specific implementation method is indefinite, simultaneously.In casting process, adopt this mouth of a river not only can be formed with the level rotary flow of effect in crystallizer region, promote the mistake heat dissipation of molten steel, be beneficial to the collision of field trash, gathering, floating and removal, stabilized steel liquid level, activation meniscus and promotionization slag effect, and then obtain the integrated metallurgical effect of similar M-EMS, also effectively can improve initial solidification shell circumference uniformity, prevent and avoid the generation of nozzle blocking and Biased flow phenomenon.
The utility model solves the technical scheme that its technical problem adopts: Yi Zhongfang, round billet continuous casting heat dissipation submersed nozzle, comprise mouth of a river body, slag line layer, mouth of a river endoporus and mouth of a river side opening, above-mentioned mouth of a river side opening is circumferentially evenly distributed with four at mouth of a river endoporus, mouth of a river side opening is expanding and is certain tilt angle alpha with horizontal direction, α value is within the scope of 10 ° ~ 25 °, side opening inwall is arbitrary radial section of mouth of a river endoporus, between side opening outer wall and the radial section formed at mouth of a river endoporus boundary line circumferentially and axis, the mouth of a river by it in obtuse angle, obtuse angle angular range is 120 ° ~ 135 °, angular range between side opening inwall and side opening outer wall is 10 ~ 25 °, angular range between side opening inwall and the radial section formed at mouth of a river endoporus boundary line circumferentially and axis, the mouth of a river by side opening outer wall is 50 ° ~ 75 °.
Described mouth of a river body and slag line layer adopt Al respectively
2o
3-C and ZrO
2-C material makes.
Described mouth of a river side opening shape is the rectangle with chamfering, also can be ellipse or track type.
The beneficial effects of the utility model are: this mouth of a river can be used for square billet, rectangular bloom and round billet continuous casting and produces, applied widely; Gate structure is simple, is easy to processing; In the casting cycle of the mouth of a river, effective level rotary flow can be formed in crystallizer, not only can promote the mistake heat dissipation of molten steel, be beneficial to the collision of field trash, gathering, floating and removal, stabilized steel liquid level, activation meniscus and promotionization slag effect, and then obtain the integrated metallurgical effect of similar M-EMS, also effectively can improve initial solidification shell circumference uniformity, prevent and avoid the generation of nozzle blocking and Biased flow phenomenon; Simultaneously the utility model can part or even all replace the use of M-EMS, and then can realize reducing production cost while guarantee product quality.
Accompanying drawing explanation
Fig. 1 is longitudinal vertical sectional view of the present utility model;
Fig. 2 is the A-A profile of accompanying drawing 1;
Fig. 3 is the scheme of installation of the utility model for casting during square billet;
Fig. 4 is the scheme of installation of the utility model for casting during rectangular bloom.
In figure: the body of the 1-mouth of a river; 2-mouth of a river endoporus; 3-mouth of a river side opening; 4-molten steel face; 5-slag line layer; 6-side opening inwall; 7-side opening outer wall; 8-square blank crystallizer; 9-rectangular-blank crystallizer.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further illustrated.
See Fig. 1 ~ Fig. 4, Yi Zhongfang, round billet continuous casting heat dissipation submersed nozzle, comprise mouth of a river body 1, slag line layer 5, mouth of a river endoporus 2 and mouth of a river side opening 3, wherein, mouth of a river body 1 and slag line layer 5 adopt Al respectively
2o
3-C and ZrO
2-C material makes, above-mentioned mouth of a river side opening is circumferentially evenly distributed with four at mouth of a river endoporus 2, mouth of a river side opening 3 shape is the rectangle with chamfering, also can be ellipse or track type, mouth of a river side opening 3 is expanding and is certain tilt angle alpha with horizontal direction, α value is within the scope of 10 ° ~ 25 °, side opening inwall 6 is arbitrary radial section of mouth of a river endoporus 2, between side opening outer wall 7 and the radial section formed at mouth of a river endoporus 2 boundary line circumferentially and axis, the mouth of a river by it in obtuse angle, obtuse angle angular range is 120 ° ~ 135 °, angular range between side opening inwall 6 and side opening outer wall 7 is 10 ~ 25 °, angular range between side opening inwall 6 and the radial section formed at mouth of a river endoporus 2 boundary line circumferentially and axis, the mouth of a river by side opening outer wall 7 is 50 ° ~ 75 °.
Embodiment 1: Yi Zhongfang, round billet continuous casting heat dissipation submersed nozzle, when the party, round billet continuous casting used heat dissipation submersed nozzle to be applied to casting square billet or rectangular bloom, need ensure that the mouth of a river has suitable immersion depth h, h value scope is 120mm ~ 140mm, and mouth of a river body 1 is when installing, should guarantee side opening inwall 6 and square blank crystallizer 8 or rectangular bloom square blank crystallizer 9 is wide, leptoprosopy forms angle β, β value should within the scope of 55 ° ~ 65 °.
Embodiment 2: Yi Zhongfang, round billet continuous casting heat dissipation submersed nozzle, when the party, round billet continuous casting used heat dissipation submersed nozzle to be applied to casting circle base, need ensure that the mouth of a river has suitable immersion depth h, h value scope was 120mm ~ 140mm.
In addition, execute in example for above-mentioned two, casting needs before producing to adopt flame suction baking method to carry out even preheating to crossing the heat dissipation mouth of a river, and preheat temperature is advisable with about 1000 DEG C, in case waterstop port breaks and the generation of dross phenomenon.
When adopting this to cross heat dissipation mouth of a river casting square billet, rectangular bloom and round billet continuous casting production, having certain downtilt angles, in expanding and under internal face is the side opening shunting action of arbitrary radial section of mouth of a river endoporus 2, inject molten steel and the initial solidification shell collision rift of crystallizer, crystallizer other region molten steel flow interior can be impelled to form effective level rotary flow, thus obtain the metallurgical effect of similar M-EMS.
This mouth of a river is applied widely, and structure is simple, is easy to processing, and can effectively prevents and avoid the generation of nozzle blocking and Biased flow phenomenon in casting cycle.Meanwhile, this mouth of a river can partly or even be the use all replacing M-EMS, and then can realize reducing production cost while guarantee product quality.
Claims (4)
1. a side, round billet continuous casting heat dissipation submersed nozzle, comprise mouth of a river body, slag line layer, mouth of a river endoporus and mouth of a river side opening, it is characterized in that: above-mentioned mouth of a river side opening is circumferentially evenly distributed with four at mouth of a river endoporus, mouth of a river side opening is expanding and is certain tilt angle alpha with horizontal direction, α value is within the scope of 10 ° ~ 25 °, side opening inwall is arbitrary radial section of mouth of a river endoporus, between side opening outer wall and the radial section formed at mouth of a river endoporus boundary line circumferentially and axis, the mouth of a river by it in obtuse angle, obtuse angle angular range is 120 ° ~ 135 °, angular range between side opening inwall and side opening outer wall is 10 ~ 25 °, angular range between side opening inwall and the radial section formed at mouth of a river endoporus boundary line circumferentially and axis, the mouth of a river by side opening outer wall is 50 ° ~ 75 °.
2. as claimed in claim 1 side, round billet continuous casting heat dissipation submersed nozzle, it is characterized in that: described mouth of a river side opening shape is the rectangle with chamfering, also can be ellipse or track type.
3. as claimed in claim 1 just, round billet continuous casting heat dissipation submersed nozzle, it is characterized in that: when the party, round billet continuous casting used heat dissipation submersed nozzle to be applied to casting square billet or rectangular bloom, need ensure that the mouth of a river has suitable immersion depth h, h value scope is 120mm ~ 140mm, and when mouth of a river body is installed, should guarantee that side opening internal face and square billet or rectangular-blank crystallizer are wide, leptoprosopy forms angle β, β value should within the scope of 55 ° ~ 65 °.
4. as claimed in claim 1 just, round billet continuous casting heat dissipation submersed nozzle, it is characterized in that: when the party, round billet continuous casting used heat dissipation submersed nozzle to be applied to casting circle base, need ensure that the mouth of a river has suitable immersion depth h, h value scope is 120mm ~ 140mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420446291.2U CN204052883U (en) | 2014-08-08 | 2014-08-08 | One side, round billet continuous casting heat dissipation submersed nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420446291.2U CN204052883U (en) | 2014-08-08 | 2014-08-08 | One side, round billet continuous casting heat dissipation submersed nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204052883U true CN204052883U (en) | 2014-12-31 |
Family
ID=52194473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420446291.2U Expired - Fee Related CN204052883U (en) | 2014-08-08 | 2014-08-08 | One side, round billet continuous casting heat dissipation submersed nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204052883U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689698A (en) * | 2016-03-09 | 2016-06-22 | 日照钢铁控股集团有限公司 | Braking-type submerged nozzle for beam blank continuous casting |
| CN111036891A (en) * | 2019-11-29 | 2020-04-21 | 浙江科宇金属材料有限公司 | Pouring pipe for vertical casting |
-
2014
- 2014-08-08 CN CN201420446291.2U patent/CN204052883U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689698A (en) * | 2016-03-09 | 2016-06-22 | 日照钢铁控股集团有限公司 | Braking-type submerged nozzle for beam blank continuous casting |
| CN111036891A (en) * | 2019-11-29 | 2020-04-21 | 浙江科宇金属材料有限公司 | Pouring pipe for vertical casting |
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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 |
Granted publication date: 20141231 Termination date: 20190808 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |