CN108942086A - Continuous casting cooling nozzles processing method - Google Patents
Continuous casting cooling nozzles processing method Download PDFInfo
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- CN108942086A CN108942086A CN201710349448.8A CN201710349448A CN108942086A CN 108942086 A CN108942086 A CN 108942086A CN 201710349448 A CN201710349448 A CN 201710349448A CN 108942086 A CN108942086 A CN 108942086A
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- nozzle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
- B22D11/1246—Nozzles; Spray heads
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The present invention relates to a kind of continuous casting cooling nozzles processing methods, which is characterized in that the method is as follows: 1) nozzle fixture is used, by certain n ° of angle of nozzle inclination；Nozzle opening first is carried out with forming tool, the depth of width carries out machining, and the depth for reaching two sides is inconsistent, then it is open using process tool, the chamfer cutting processing of width bottom surface；2) nozzle is fixed on the fixture of rotation, first carries out the machining of first time nozzle opening width depth with being shaped to tool；M ° of fixture is rotated clockwise again, the machining of second of progress nozzle opening width depth；M ° of another mistake hour hands rolling clamp angle 2；Third time carries out the machining of nozzle opening width depth；3) method in step 1) and step 2 is applied in combination.
Description
Technical field
The present invention relates to a kind of processing methods, and in particular to it is cold to belong to continuous casting for a kind of continuous casting cooling nozzles processing method
But equipment technical field.
Background technique
The purpose of continuous casting secondary cooling is to carry out continuous coo1ing to leaving the slab after crystallizer, is allowed to before cutting completely
Solidification.Secondary cooling is a highly important process in continuous casting process, is played to guarantee slab quality, raising continuous casting rate
Vital effect.The impact heat transfer of nozzle shower water and casting billet surface is the main heat transfer mode of secondary cooling；Nozzle
Design, type selecting and the technology arrangement of cooling effect and nozzle, type, structure and the performance of nozzle have very big relationship.Also with mist
It is related to change impact density, water-flow equation of water droplet etc., is casting machine maximum pulling rate, operating rate, slab variety and quality and consumption level
One of deciding factor.
We term it common di-cold spray nozzle, the characteristics of common di-cold spray nozzle is the secondary cooling water nozzle of conticaster normal use
For water distribution shape in approximate trapezoid distribution (such as attached drawing 1), advantage is that amount of water sprayed is substantially uniform in trapezoidal profile coverage area
Distribution, keep slab cooling relatively uniform, but the disadvantage is that but since slab corner is two-dimentional cooling, intensity of cooling is big, cooling speed
Degree is fast, and slab corner supercooling, slab corner temperature falls into the cold plasticity curve of steel, is easy to produce a large amount of slab corner and splits
Line seriously affects continuous casting billet base quality.
In industrial practice, since the two dimension in corner is cooling, the supercooling of slab corner does not well solve method, causes
The higher problem of slab corner crack defect incidence is not solved always very well, becomes one in CC at home & abroad industry
Technical problem has the hot issue of a large amount of correlation report and continuous casting circle in data document.In order to make slab corner weak cold,
The method that people can find out at present has 2 kinds, and one is the spray nozzle cloggings that will be close to slab corner, does not allow water spray, but this
Mode not only operates difficulty, operates on high temperature again dark streamline extremely dangerous, easily causes and the person such as falls, scald and hurt
Evil accident.And maximum problem is proximate to the nozzle in slab corner and is blocked, and slab corner is together with adjacent corner slab
It cannot all cool down, easily cause the quality, production accident such as slab corner bulge bleed-out.Another method is to cut control using width,
I.e. the nozzle in slab corner and nozzle in the middle part of slab are used is controlled using two independent circuits, by angle when needing corner weak cold
The nozzle circuit stop valve in portion is closed.Disadvantage needs to increase a large amount of investment, second is that with the first side first is that control loop is complicated
Formula is similar, and water-spraying control, slab corner cannot all not cool down the nozzle close to slab corner together with adjacent corner slab, Yi Zao
At quality, production accident such as slab corner bulge bleed-outs.Therefore, a kind of new scheme of urgent need solves the technical problem.
Summary of the invention
The present invention exactly for the technical problems in the prior art, provides a kind of continuous casting cooling nozzles processing side
Method, which is changed to the distribution of near parabolic shape by approximate trapezoid distribution for the water distribution shape of nozzle, using away from slab
In widthwise central certain distance uniformly it is strong it is cold, be transitioned at away from slab edge 100mm moderate cooling then to corner become compared with
The refrigerating mode of weak cold but.Water is big, cooling strong in the middle part of the mode, not only reduces casting blank surface temperature, more significantly improves width
The solidification inhomogeneities in direction, the difference of height warm area are obviously reduced, and the liquid core shape of two cold strong chill casting bases more levels off to
Even, the range in higher temperature area narrows, and in addition liquid core length also shortens, thus be very beneficial for centre burst, trigonum is split
The control of line and segregation defects.
To achieve the goals above, technical scheme is as follows, a kind of continuous casting cooling nozzles processing method, special
Sign is that the method is as follows: 1) nozzle fixture is used, by certain n ° of angle of nozzle inclination；First sprayed with forming tool
The depth of mouth opening, width carries out machining, and the depth for reaching two sides is inconsistent, is then open using process tool,
The chamfer cutting of width bottom surface is processed；2) nozzle is fixed on the fixture of rotation, first be shaped to tool carry out first time nozzle
The machining of opening width depth；M ° of fixture is rotated clockwise again, and second of cutting for carrying out nozzle opening width depth adds
Work；2m ° of angle of another mistake hour hands rolling clamp；Third time carries out the machining of nozzle opening width depth；3) step 1) and step
It is rapid 2) in method be applied in combination.
As an improvement of the present invention, the angle n in the step 1) is 5-20 °.
As an improvement of the present invention, the angle m in the step 2 is 3-9 °.
The nozzle processed according to the method described above, the water distribution of the nozzle are parabolic shape.
Compared with the existing technology, the invention has the advantages that, 1) cost is relatively low for the technical solution, and makes full use of existing
Some equipment, greatly reduces cost；2) according to nozzle provided by the invention design and processing method, device fabrication is carried out, it is existing
Field installation test, the cooling water inflow that discovery is ejected into slab corner reduces, therefore the temperature in slab corner is improved, simultaneously
The intensity of cooling of steel slab surface center is also suitable, and it is uniform to realize temperature of the steel slab surface from center to corner, to protect
Slab quality is demonstrate,proved, the slab for being 230*1300mm to specifications section on site surveys the temperature in slab corner and center surface
All control avoids the cold plasticity temperature of steel grade, slab corner crack is reduced to 1% by 30% at 820 DEG C or more completely
Below；3) present invention has preferable popularization and application foreground, and the edge that the corner crack of slab directly results in hot-rolled sheet coil sticks up skin
Defect, and the corner crack for controlling slab is the common difficulty of world's continuous-casting art, using flow core shift nozzle of the invention, is made
Nozzle water shape distribution from approximate trapezoid be uniformly distributed become core shift near parabolic shape distribution, realize slab in the middle part of water
Greatly, cooling strong；The type of cooling that corner cooling water inflow is small, intensity of cooling is weak makes the setting temperature on slab width be evenly distributed
And corner temperature is higher, the opposite requirement for having taken into account casting billet surface and internal soundness.Not only improve centre burst, triangular area crack
With the control of segregation defects, and be conducive to the control of slab corner crack, improve slab quality, method is simple, conveniently, it is economical,
Efficiently.
Detailed description of the invention
Fig. 1 is that existing plain nozzle surveys irrigation water distribution map；
The existing caster two cold plain nozzle arrangement schematic diagram of Fig. 2；
Fig. 3 special eccentric nozzle actual measurement irrigation water distribution map after improving；
Fig. 4 changes spray angle nozzle processing method schematic diagram；
Fig. 5 is to change opening width nozzle processing method schematic diagram in Application Example；
Fig. 6 is the cooling change procedure schematic diagram for using flow core shift nozzle of continuous casting.
Specific embodiment:
In order to deepen the understanding of the present invention, the present embodiment is described in detail with reference to the accompanying drawing.
Embodiment 1: referring to Fig. 3, a kind of continuous casting cooling nozzles processing method, the method is as follows: 1) using nozzle clamp
Tool, by certain n ° of angle of nozzle inclination；Nozzle opening first is carried out with forming tool, the depth of width carries out machining, reaches
Depth to two sides is inconsistent, is then open using process tool, the chamfer cutting processing of width bottom surface；2) nozzle is consolidated
It is scheduled on the fixture of rotation, first carries out the machining of first time nozzle opening width depth with being shaped to tool；Rotation clockwise again
Turn m ° of fixture, the machining of second of progress nozzle opening width depth；2m ° of angle of another mistake hour hands rolling clamp；For the third time
Carry out the machining of nozzle opening width depth；3) method in step 1) and step 2 is applied in combination, the step 1)
In angle n be 5-20 °, the angle m in the step 2 is 3-9 °.Water is big, cooling strong in the middle part of this method, not only reduces
Casting blank surface temperature more significantly improves the solidification inhomogeneities of width direction, and the difference of height warm area is obviously reduced, and two is cold strong
The liquid core shape of chill casting base more levels off to uniformly, and the range in higher temperature area narrows, and in addition liquid core length also shortens.Cause
And it is very beneficial for the control of centre burst, triangular area crack and segregation defects；The mode slab corner water is small, cooling is weak,
The cooling velocity and intensity of cooling in slab corner are controlled very well, improve slab corner temperature, and slab corner is avoided completely
The brittle temperature range of crack-sensitivity effectively controls slab corner crack and occurs.This refrigerating mode of the invention, slab width
On setting temperature be evenly distributed and corner temperature is higher, the opposite requirement for having taken into account casting billet surface and internal soundness.In width
Solidification near the heart is more uniform, and higher temperature area range is smaller, also smaller with the temperature difference in centre, is very beneficial for
The control of centre burst, triangular area crack and segregation defects；But slab corner temperature is higher, and slab plasticity is good, and highly beneficial
In the control of slab corner crack.
Application example:
Design 1: a kind of continuous casting cooling nozzles processing method conventional spout is sprayed by center nozzle two sides of the center of spray head
Asymmetric design is changed into angle symmetrical design, is less than spray head close to slab center close to the spray angle of slab corner side
The spray angle of side；Nozzle center is changed to the center of nozzle spray angle from the center of conventional spout spray head, to realize stream
Core shift control is measured, the size of core shift angle=n °, n depends on slab width dimensions, as following table is corresponding
Processing method:
Using nozzle fixture, by certain n ° of the angle (n=5-20) of nozzle inclination；First nozzle opening width is carried out with forming tool
Depth carry out machining, the depth for reaching two sides is inconsistent, is then open using process tool, and width bottom surface is fallen
Angle machining, as shown in Figure 4.
Design 2: conventional spout is changed by the symmetric design of center line nozzle both-side opening width of the center line of spray head
For asymmetric design, make to meet and discuss the width being less than close to the width of one side opening of slab corner close to one side opening of slab center；
Nozzle centerline is changed to the center line of nozzle opening depth from the center line of conventional spout spray head, to realize flow core shift control
The size of system, core shift angle=m °, m depends on slab width dimensions, as following table is corresponding
Processing method:
Nozzle is fixed on the fixture of rotation, is first added with being shaped to tool and carry out the cutting of first time nozzle opening width depth
Work；M ° of fixture (m=3-9) is rotated clockwise, the machining of second of progress nozzle opening width depth；Rotating clamp counterclockwise
2m ° of angle of tool；Third time carries out the machining of nozzle opening width depth, as shown in Figure 5.
Design 3: the combination of above-mentioned design 1 and design 2, the i.e. spray angle of nozzle and the width of nozzle opening change simultaneously
Become: as shown in the figure 7: processing method: to first, second kind of processing method Combined machining is closed, being not repeated to describe.Spray of the invention
Mouth design variation process is as shown in Figure 6.
It should be noted that above-described embodiment, is not intended to limit the scope of protection of the present invention, in above-mentioned technical proposal
On the basis of made equivalents or substitution each fall within the range that the claims in the present invention are protected.
Claims (4)
1. a kind of continuous casting cooling nozzles processing method, which is characterized in that the method is as follows: 1) using nozzle fixture, will spray
Mouth tilts n ° of certain angle；Nozzle opening first is carried out with forming tool, the depth of width carries out machining, reaches two sides
Depth is inconsistent, is then open using process tool, the chamfer cutting processing of width bottom surface；2) nozzle is fixed on rotation
Fixture on, first carry out the machining of first time nozzle opening width depth with being shaped to tool；M ° of fixture is rotated clockwise again,
The machining of second of progress nozzle opening width depth；M ° of another mistake hour hands rolling clamp angle 2；Third time carries out nozzle
The machining of opening width depth；3) method in step 1) and step 2 is applied in combination.
2. continuous casting according to claim 1 cooling nozzles processing method, which is characterized in that the angle in the step 1)
N is 5-20 °.
3. continuous casting according to claim 1 cooling nozzles processing method, which is characterized in that the angle in the step 2
M is 3-9 °.
4. the nozzle that continuous casting described in claim 1-3 any one claim is processed with cooling nozzles processing method, special
Sign is that the water distribution of the nozzle is parabolic shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710349448.8A CN108942086A (en) | 2017-05-17 | 2017-05-17 | Continuous casting cooling nozzles processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710349448.8A CN108942086A (en) | 2017-05-17 | 2017-05-17 | Continuous casting cooling nozzles processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108942086A true CN108942086A (en) | 2018-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710349448.8A Pending CN108942086A (en) | 2017-05-17 | 2017-05-17 | Continuous casting cooling nozzles processing method |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0126688A1 (en) * | 1983-05-20 | 1984-11-28 | FIVES-CAIL BABCOCK, Société anonyme | Spray nozzle |
| CN2150925Y (en) * | 1993-04-27 | 1993-12-29 | 上海喷枪厂 | Spray gun with sector spraying |
| CN1427748A (en) * | 2000-01-26 | 2003-07-02 | 喷洒系统公司 | Spray nozzle with improved asymmetrical fluid discharge distribution |
| CN2845919Y (en) * | 2005-09-07 | 2006-12-13 | 蒋鸿文 | Integrated fan shape fluid jet nozzle |
| CN102699297A (en) * | 2012-06-29 | 2012-10-03 | 秦皇岛首秦金属材料有限公司 | Method for solving transverse cracks of ultra-thick plate billet corner by applying 3D (three-dimensional) spraying process |
| CN203470205U (en) * | 2013-09-18 | 2014-03-12 | 成都市高荣华龙实业有限公司 | Nozzle of scattering structure |
| CN204564373U (en) * | 2015-01-07 | 2015-08-19 | 徐州博泰矿山安全科技有限公司 | Arc-shaped is sprayed and the foam dust suppression spray head of angle adjustable |
| WO2016077114A1 (en) * | 2014-11-10 | 2016-05-19 | Bowles Fluidics Corporation | Spray nozzle for high viscosity (e.g., oil) spray applications with uniform spray distribution |
| CN205518267U (en) * | 2016-01-30 | 2016-08-31 | 东莞市长原喷雾技术有限公司 | Be high pressure nozzle that circular arc sector sprays |
| EP3162461A1 (en) * | 2014-06-26 | 2017-05-03 | H. Ikeuchi & Co., Ltd. | Spray nozzle |
-
2017
- 2017-05-17 CN CN201710349448.8A patent/CN108942086A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0126688A1 (en) * | 1983-05-20 | 1984-11-28 | FIVES-CAIL BABCOCK, Société anonyme | Spray nozzle |
| CN2150925Y (en) * | 1993-04-27 | 1993-12-29 | 上海喷枪厂 | Spray gun with sector spraying |
| CN1427748A (en) * | 2000-01-26 | 2003-07-02 | 喷洒系统公司 | Spray nozzle with improved asymmetrical fluid discharge distribution |
| CN2845919Y (en) * | 2005-09-07 | 2006-12-13 | 蒋鸿文 | Integrated fan shape fluid jet nozzle |
| CN102699297A (en) * | 2012-06-29 | 2012-10-03 | 秦皇岛首秦金属材料有限公司 | Method for solving transverse cracks of ultra-thick plate billet corner by applying 3D (three-dimensional) spraying process |
| CN203470205U (en) * | 2013-09-18 | 2014-03-12 | 成都市高荣华龙实业有限公司 | Nozzle of scattering structure |
| EP3162461A1 (en) * | 2014-06-26 | 2017-05-03 | H. Ikeuchi & Co., Ltd. | Spray nozzle |
| WO2016077114A1 (en) * | 2014-11-10 | 2016-05-19 | Bowles Fluidics Corporation | Spray nozzle for high viscosity (e.g., oil) spray applications with uniform spray distribution |
| CN204564373U (en) * | 2015-01-07 | 2015-08-19 | 徐州博泰矿山安全科技有限公司 | Arc-shaped is sprayed and the foam dust suppression spray head of angle adjustable |
| CN205518267U (en) * | 2016-01-30 | 2016-08-31 | 东莞市长原喷雾技术有限公司 | Be high pressure nozzle that circular arc sector sprays |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181207 |
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| RJ01 | Rejection of invention patent application after publication |