CN105458196B - A kind of twin-roll thin strip continuous casting water nozzle - Google Patents
A kind of twin-roll thin strip continuous casting water nozzle Download PDFInfo
- Publication number
- CN105458196B CN105458196B CN201510890292.5A CN201510890292A CN105458196B CN 105458196 B CN105458196 B CN 105458196B CN 201510890292 A CN201510890292 A CN 201510890292A CN 105458196 B CN105458196 B CN 105458196B
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- Prior art keywords
- turbulent flow
- inhibits
- wall surface
- continuous casting
- structural sections
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/064—Accessories therefor for supplying molten metal
- B22D11/0642—Nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
Abstract
A kind of twin-roll thin strip continuous casting water nozzle, including diversion section and go out liquid section, admission chamber is provided in diversion section, liquid outlet is offered on liquid section is gone out, turbulent flow inhibition structural sections are provided with going out liquid pars infrasegmentalis, inhibit to be symmetrically arranged with turbulent flow inhibition wall surface at two in structural sections in turbulent flow, it is corresponding with crystallization roll working face that turbulent flow inhibits wall surface；Turbulent flow inhibits wall surface using arc surface, and the longitudinal center line of turbulent flow inhibition wall surface and the longitudinal center line of crystallization roll coincide；Turbulent flow inhibits to form turbulent flow inhibition zone between wall surface and crystallization roll working face, and the spacing range of turbulent flow inhibition zone is 0.01mm~10mm；It is plane that turbulent flow, which inhibits structural sections lower face, and it is inclined-plane that turbulent flow, which inhibits structural sections upper surface, and angular range is 1 °~90 ° between turbulent flow inhibits the upper and lower end face of structural sections.The present invention can effectively avoid the excessive development of boundary layer shear flow, the porous defect of strip caused by can inhibiting Karman vortex street phenomenon, so as to effectively improve continuous casting process stability and thin strap continuous casting quality.
Description
Technical field
The invention belongs to strip continuous casting technology field, more particularly to a kind of twin-roll thin strip continuous casting water nozzle.
Background technology
Steel material is the material base of modern civilization society, and in a foreseeable future, steel will be used as social pillar
Material and exist, and continuous cast method be produce steel material main technological means.Substance society to it is higher level into
During step, requirements at the higher level are proposed to the quality of steel material, and produces, use and recycles there is an urgent need to reduce steel material
In the process to the negative effect of society, and realize that the mankind safeguard the strategy of sustainable development that is common following and formulating, this requirement connects
Casting technology will the improvement for the amount of having or even the change of matter.With the accumulation of knowhow, the especially progress of basic theory, digital meter
The use of the complicated real process of calculation machine prediction, indispensable basis is provided for the improvement of continuous casting technology.At present, continuous casting technology
It is still current most active and with strongest influence power steel scientific and technical innovation point, its developing direction is, it is necessary to consider environment shadow
Sound and economy of resources coordinate and optimize Business Economic Benefit and social benefit, to sum up, be exactly " green manufacturing ", and conduct
The twin-roll thin strip continuous casting of ultimate continuous casting technology just belongs to " green manufacturing ".
At present, as " green manufacturing " rises to national strategy, there is the strip continuous casting technology of title of " dream " again by state
Interior major universities and colleges and related scientific research institutes put on important research status, as one kind of near net shape casting, the double roller of steel
Strip continuous casting technology links together metallurgical technology and metal material tissue performance are even closer, belongs to research interdisciplinary
Scope is also the important development direction of current steel and iron industry, the huge business that its existing technique of driving force is contained in itself
Value, more has the unprecedented immense pressure from Current resource and environment, these driving factors cause enterprise and Research Center
It is ready to put into huge manpower and fund to break through the existing pattern technology superiority of current steel and iron industry in school.
In Twin-roll Strip Continuous Casting, molten metal is enclosed by the mouth of a river into counter-rotation crystallization roll with lateral seal
Into molten bath in, molten metal crystallization roll working face in molten bath experience Sub realizable fuzzy matrix process, finally from two crystallization roll distances
Nearest place pull-out.And gate structure is one of important factor in order of strip quality.Research shows：Twin-roll thin strip continuous casting
In the process, the rotation of crystallization roll itself can cause its working face the shear flow of metal bath occur, and shear flow and molten bath
Bottom reflux interaction can generate low viscosity high-temperature region, i.e. tapered region close to the position of crystallization roll working face, reduce rolling
Section length, and technology stability is finally reduced, influence final strip quality；Meanwhile gate structure is likely to cause Karman vortex street
Appearance, this be cause Cast Strip occur porous defect the main reason for.So during gate structure is designed, it is necessary to knot
The development of brilliant roller working face shear flow is inhibited, while is avoided or inhibited Karman vortex street phenomenon.
The content of the invention
In view of the problems of the existing technology, the present invention provides a kind of twin-roll thin strip continuous casting water nozzle, can effectively avoid
The excessive development of crystallization roll working face shear flow, and the porous defect of strip caused by Karman vortex street phenomenon can be inhibited simultaneously,
So as to effectively improve continuous casting process stability and thin strap continuous casting quality.
To achieve these goals, the present invention adopts the following technical scheme that：A kind of twin-roll thin strip continuous casting water nozzle, including leading
Stream and goes out liquid section at section, and admission chamber is provided in the diversion section, it is described go out liquid section on offer liquid outlet, its main feature is that：
It is described go out liquid pars infrasegmentalis be provided with turbulent flow inhibit structural sections, turbulent flow inhibit structural sections on offer turbulent flow inhibit wall surface.
Inhibit to be symmetrically arranged with turbulent flow inhibition wall surface, the turbulent flow at two in structural sections in the turbulent flow and inhibit wall surface and knot
Brilliant roller working face is corresponding.
The turbulent flow inhibits combination of the wall surface using arc surface, plane or plane and arc surface, and turbulent flow inhibits wall surface
The longitudinal center line of longitudinal center line and crystallization roll coincides or misaligned.
The turbulent flow inhibits to form turbulent flow inhibition zone, the spacing of the turbulent flow inhibition zone between wall surface and crystallization roll working face
Scope is 0.01mm~10mm.
The turbulent flow inhibits combination of the structural sections lower face for plane, arc surface or plane and arc surface, and turbulent flow inhibits knot
Structure section upper surface for inclined-plane, arc surface or plane and arc surface combination, turbulent flow inhibit structural sections upper surface and lower face it
Between angular range be 1 °~90 °.
Beneficial effects of the present invention：
Compared with prior art, the present invention turbulent flow suppression can be collectively formed for the first time with crystallization roll working face by being added in the mouth of a river
The turbulent flow in area processed inhibits structural sections, is only improved by simple gate structure, just realizes and improves continuous casting process stability and thin
Purpose with continuous casting quality.After increasing turbulent flow and inhibiting structural sections, when the boundary layer shear flow of crystal roller surface presses down by turbulent flow
When the turbulent flow of section processed inhibits the turbulent flow inhibition zone that wall surface is formed with crystallization roll working face, crystallization roll working face shear flow is effective
Inhibiting, excessive development trend is effectively prevented, so that tapered region depth is minimized, final increase rolls section length, and
And effectively inhibit the porous defect of strip caused by Karman vortex street phenomenon, so as to effectively increase continuous casting process stability and
Thin strap continuous casting quality.
Description of the drawings
Fig. 1 is the twin-roll thin strip continuous casting water nozzle structure diagram of the present invention；
Fig. 2 is the twin-roll thin strip continuous casting water nozzle of the present invention and the location diagram of crystallization roll；
Fig. 3 is I portions enlarged drawing in Fig. 2；
In figure, 1-diversion section, 2-go out liquid section, 3-turbulent flow inhibits structural sections, and 4-turbulent flow inhibits wall surface, 5-crystallization roll,
6-turbulent flow inhibition zone.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, 2, 3, a kind of twin-roll thin strip continuous casting water nozzle including diversion section 1 and goes out liquid section 2, in the water conservancy diversion
Section 1 in be provided with admission chamber, it is described go out liquid section 2 on offer liquid outlet, its main feature is that：It is described go out 2 lower part of liquid section set
There is turbulent flow to inhibit structural sections 3, inhibit to offer turbulent flow inhibition wall surface 4 in structural sections 3 in turbulent flow.
Inhibit to be symmetrically arranged with turbulent flow inhibition wall surface 4, the turbulent flow at two in structural sections 3 in the turbulent flow and inhibit wall surface 4
It is corresponding with 5 working face of crystallization roll.
The turbulent flow inhibits wall surface 4 using arc surface, and turbulent flow inhibits the longitudinal center line of wall surface 4 and the axis of crystallization roll 5
It coincides to center line.
The turbulent flow inhibits to form turbulent flow inhibition zone 6 between 5 working face of wall surface 4 and crystallization roll, the turbulent flow inhibition zone 6
Spacing is 5mm.
It is plane that the turbulent flow, which inhibits 3 lower face of structural sections, and it is inclined-plane that turbulent flow, which inhibits 3 upper surface of structural sections, and turbulent flow inhibits
Angle between the upper surface and lower face of structural sections 3 is 33 °.
Behind the new mouth of a river that traditional mouth of a river is replaced with to the present invention, since turbulent flow inhibits wall surface 4 close to 5 working face of crystallization roll
And turbulent flow inhibition zone 6 is formed, in Twin-roll Strip Continuous Casting, when the shear flow of 5 working face of crystallization roll passes through turbulent flow inhibition zone 6
When, the development of 5 working face shear flow of crystallization roll is effectively suppressed, and can be reduced tapered region depth, is effectively increased rolling section length.Again
Have, the velocity perturbation that crystallization roll working face molten metal occurs caused by Karman vortex street phenomenon is also effectively suppressed, Jin Eryou
Effect avoids the porous defect of strip, so as to effectively increase continuous casting process stability and thin strap continuous casting quality.
The present invention is using early-stage study as design considerations, by setting and being formed with crystallization roll working face in mouth of a river lower part
The turbulent flow of turbulent flow inhibition zone inhibits wall surface, effectively improves continuous casting process stability and thin strap continuous casting quality.
Scheme in embodiment be not to limit the scope of patent protection of the present invention, it is all without departing from carried out by the present invention etc.
Effect implements or change, is both contained in the scope of the claims of this case.
Claims (3)
1. a kind of twin-roll thin strip continuous casting water nozzle including diversion section and goes out liquid section, admission chamber is provided in the diversion section,
It is described go out liquid section on offer liquid outlet, it is characterised in that：It is described go out liquid pars infrasegmentalis be provided with turbulent flow inhibit structural sections, in rapids
Stream inhibits to offer turbulent flow inhibition wall surface in structural sections；Inhibit to be symmetrically arranged with turbulent flow inhibition at two in structural sections in the turbulent flow
Wall surface, it is corresponding with crystallization roll working face that the turbulent flow inhibits wall surface；The turbulent flow inhibits between wall surface and crystallization roll working face
Turbulent flow inhibition zone is formed, the spacing range of the turbulent flow inhibition zone is 0.01mm~10mm.
2. a kind of twin-roll thin strip continuous casting water nozzle according to claim 1, it is characterised in that：The turbulent flow inhibits wall surface and adopts
With the combination of arc surface, plane or plane and arc surface, and turbulent flow inhibits in the longitudinal center line of wall surface and the axial direction of crystallization roll
Heart line coincides or misaligned.
3. a kind of twin-roll thin strip continuous casting water nozzle according to claim 1, it is characterised in that：The turbulent flow inhibits structural sections
Lower face is the combination of plane, arc surface or plane and arc surface, and it is inclined-plane, arc surface or flat that turbulent flow, which inhibits structural sections upper surface,
Face and the combination of arc surface, the angular range that turbulent flow inhibits between the upper surface and lower face of structural sections are 1 °~90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510890292.5A CN105458196B (en) | 2015-12-07 | 2015-12-07 | A kind of twin-roll thin strip continuous casting water nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510890292.5A CN105458196B (en) | 2015-12-07 | 2015-12-07 | A kind of twin-roll thin strip continuous casting water nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105458196A CN105458196A (en) | 2016-04-06 |
| CN105458196B true CN105458196B (en) | 2018-05-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510890292.5A Active CN105458196B (en) | 2015-12-07 | 2015-12-07 | A kind of twin-roll thin strip continuous casting water nozzle |
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| CN (1) | CN105458196B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3587719A (en) * | 1968-12-21 | 1971-06-28 | Mannesmann Ag | Molten metal supply apparatus for preventing oxide contamination in continuously cast steel products |
| US4671433A (en) * | 1984-07-24 | 1987-06-09 | Centro Sperimentale Metallurgico Spa | Continuous casting nozzle |
| CN1209763A (en) * | 1996-01-24 | 1999-03-03 | 石川岛播磨重工业株式会社 | Metal delivery system for continuous caster |
| US6070647A (en) * | 1996-12-23 | 2000-06-06 | Ishikawajima-Harima Heavy Industries Company Limited | Casting metal strip |
| CN1960823A (en) * | 2004-02-17 | 2007-05-09 | 卡斯特里普公司 | A method and apparatus for continuously casting steel strip |
| CN101708536A (en) * | 2009-11-03 | 2010-05-19 | 上海大学 | Bowl type turbulence-inhibiting flow-stabilizing flow distribution device for continuous casting of thin band |
| CN102328038A (en) * | 2011-10-18 | 2012-01-25 | 上海大学 | Multi-nozzle flow stabilizing and distributing device for strip continuous casting |
| CN202291394U (en) * | 2011-10-26 | 2012-07-04 | 宝山钢铁股份有限公司 | Submersed nozzle for reducing turbulent flow in slab crystallizer |
-
2015
- 2015-12-07 CN CN201510890292.5A patent/CN105458196B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3587719A (en) * | 1968-12-21 | 1971-06-28 | Mannesmann Ag | Molten metal supply apparatus for preventing oxide contamination in continuously cast steel products |
| US4671433A (en) * | 1984-07-24 | 1987-06-09 | Centro Sperimentale Metallurgico Spa | Continuous casting nozzle |
| CN1209763A (en) * | 1996-01-24 | 1999-03-03 | 石川岛播磨重工业株式会社 | Metal delivery system for continuous caster |
| US6070647A (en) * | 1996-12-23 | 2000-06-06 | Ishikawajima-Harima Heavy Industries Company Limited | Casting metal strip |
| CN1960823A (en) * | 2004-02-17 | 2007-05-09 | 卡斯特里普公司 | A method and apparatus for continuously casting steel strip |
| CN101708536A (en) * | 2009-11-03 | 2010-05-19 | 上海大学 | Bowl type turbulence-inhibiting flow-stabilizing flow distribution device for continuous casting of thin band |
| CN102328038A (en) * | 2011-10-18 | 2012-01-25 | 上海大学 | Multi-nozzle flow stabilizing and distributing device for strip continuous casting |
| CN202291394U (en) * | 2011-10-26 | 2012-07-04 | 宝山钢铁股份有限公司 | Submersed nozzle for reducing turbulent flow in slab crystallizer |
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| Publication number | Publication date |
|---|---|
| CN105458196A (en) | 2016-04-06 |
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