CN110523934A - A kind of combined type can repair the high pulling rate crystallizer of small billet - Google Patents
A kind of combined type can repair the high pulling rate crystallizer of small billet Download PDFInfo
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- CN110523934A CN110523934A CN201910967386.6A CN201910967386A CN110523934A CN 110523934 A CN110523934 A CN 110523934A CN 201910967386 A CN201910967386 A CN 201910967386A CN 110523934 A CN110523934 A CN 110523934A
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- crystallizer
- repair
- pulling rate
- high pulling
- combined type
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 63
- 229910052802 copper Inorganic materials 0.000 claims abstract description 63
- 239000010949 copper Substances 0.000 claims abstract description 63
- 230000007547 defect Effects 0.000 claims abstract description 8
- 239000000498 cooling water Substances 0.000 claims abstract description 7
- 238000007711 solidification Methods 0.000 claims abstract description 7
- 230000008023 solidification Effects 0.000 claims abstract description 7
- 239000002893 slag Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000009826 distribution Methods 0.000 claims description 4
- 238000002425 crystallisation Methods 0.000 abstract description 3
- 230000008025 crystallization Effects 0.000 abstract description 3
- 238000009851 ferrous metallurgy Methods 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000005266 casting Methods 0.000 description 7
- 238000009749 continuous casting Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005499 meniscus Effects 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 206010011376 Crepitations Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Classifications
-
- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/0406—Moulds with special profile
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The present invention provides a kind of combined types can repair the high pulling rate crystallizer of small billet, it is related to technical field of ferrous metallurgy, not only there is very strong exchange capability of heat, also help green shell and crystallizer fits closely, it can guarantee the heat exchange efficiency of crystallizer and the uniformity of green shell, meet slab quality requirement；The crystallizer includes four pieces of copper sheets, and for being combined into the crystallizer shell of strip, the intracavity section of the crystallizer shell is rectangular；Sink, set on the outer surface of the crystallizer shell, for increasing the contact area of crystallizer and cooling water；Chamfering, the interior angle set on adjacent two pieces of copper sheet junctions, for facilitating slag and reducing slab corner defect；The inner surface band of taper, the crystallizer shell is tapered, for compensating the solidification shrinkage of slab.During technical solution provided by the invention is suitable for small billet crystallization.
Description
[technical field]
The present invention relates to technical field of ferrous metallurgy more particularly to a kind of combined type can repair the high pulling rate crystallization of small billet
Device.
[background technique]
Common tubular type billet mould can satisfy conventional casting speed continuous casting production using water seam and copper pipe contact heat-exchanging
It is required that.But under the conditions of the continuous casting of high pulling rate, small billet shorter residence time in crystallizer, so that casting blank solidification green shell
Thickness reduces, the frictional force between green shell and crystallizer increases；According to common tube type mold, cooling capacity is insufficient, shape
At solidified shell it is relatively thin, without enough intensity resist ferrostatic pressure, be easy cause bleed-out accident.Therefore, high pulling rate connects
Casting production requirement crystallizer have enough intensities of cooling and it is thermally conductive uniformly, to guarantee that crystallizer exit green shell has certain safety thick
It spends to resist ferrostatic pressure without deformation and bleed-out.
Chinese patent CN106825465A discloses a kind of crystallizer for preventing defect, and intake chamber and more is arranged in water tank
A water-supplying chamber, cooling trough are connected to intake chamber with water-supplying chamber, and the sectional area of cooling trough becomes smaller in meniscus surface area, and are gone out
Water chamber can connect valve, the water flow of meniscus surface area be adjusted by control water flow, playing reduces crystallizer meniscus area
Intensity of cooling, effectively prevention or reduction continuous casting billet crack, and improve continuous casting billet quality.However above-mentioned patent does not account for
The geomery of cooling trough and distribution are not designed the copper sheet sink in slab corner, when cooling trough is uniformly distributed
When on copper sheet, the exchange capability of heat of copper sheet is suitable at boiled water slot, but slab corner is influenced cooling very fast, easy shape by Two-Dimensional Heat
At corner defects such as recess and crackles.
Chinese patent CN207642259U discloses a kind of high pulling rate equilibrium efficient heat transfer crystallizer copper pipe, by will be common
Square billet or rectangular-blank crystallizer copper pipe huyashi-chuuka (cold chinese-style noodles) fluting, enhance the heat convection of slab, and to crystallizer different location groove width,
Depth and density are adjusted, and making slab, temperature and stress are uniform everywhere, and effectively slab can be avoided by temperature and unbalanced stress
The defect Deng caused by improves slab quality while improving pulling rate.However the crystallizer uses integral type copper tube design, can not tear open
Unload, when copper pipe inner wall damage need to just replace new crystallizer to a certain extent, can not to its reconditioning, only first use service life,
It cannot be repeated as many times and use.
Chinese patent CN206763871U discloses a kind of steel-making continuous casting with uniformly cooling down high pulling rate crystallizer, the crystallizer
For rectangular or rectangle copper pipe, by cutting off common square billet or rectangular-blank crystallizer copper pipe lower part four corners, appropriate enhancing casting
Base can effectively avoid slab corner and deviation angular zone from recess and crackle etc. occur and lack in the heat convection for deviateing angular zone
It falls into, improves slab quality.However after crystallizer copper pipe lower part four corners are removed, the rigidity of copper pipe is reduced, cannot be to slab
Play good supporting role, casting blank shell is relatively thin in crystallizer at this time, by ferrostatic pressure effect easily cause deformation and
Bleed-out；Furthermore the crystallizer uses integral type copper tube design, can not dismantle, when the damage of copper pipe inner wall just needs to replace to a certain extent
New crystallizer can not cannot be repeated as many times and use to its reconditioning, only first use service life.
The high pulling rate crystallizer of small billet can be repaired therefore, it is necessary to study a kind of combined type to cope with the prior art not
Foot, to solve the problems, such as or mitigate said one or multiple.
[summary of the invention]
In view of this, the present invention provides a kind of combined types can repair the high pulling rate crystallizer of small billet, not only have very strong
Exchange capability of heat, also help green shell and crystallizer fit closely, can guarantee crystallizer heat exchange efficiency and green shell it is uniform
Property, meet slab quality requirement.
On the one hand, the present invention, which provides a kind of combined type, can repair the high pulling rate crystallizer of small billet, which is characterized in that the knot
Brilliant device includes:
Four pieces of copper sheets, for being combined into the crystallizer shell of strip, the intracavity section of the crystallizer shell is rectangular；
Sink, set on the outer surface of the crystallizer shell, for increasing the contact area of crystallizer and cooling water；
Chamfering, the interior angle set on adjacent two pieces of copper sheet junctions, for facilitating slag and reducing slab corner defect；
The inner surface band of the crystallizer shell is tapered, for compensating the solidification shrinkage of slab.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the copper sheet
Thick H is 40~65mm.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the sink exist
It is uniformly distributed on copper sheet or uneven distribution.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the sink
Maximum width is 2~10mm, and the depth of the sink is 5~30mm, and the spacing between two neighboring sink is 5~20mm；Institute
The minimum range for stating the bottom of sink and the inner surface of copper sheet where it is 15~35mm.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the sink
Cross-sectional shape is rectangle, trapezoidal, hexagon, round or ellipse.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the sink
When cross-sectional shape is rectangle, the root of the rectangle is equipped with circular arc.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the crystallizer
Length be 800~1000mm.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the crystallizer
Taper using single taper, double tapered or three tapers.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the taper
Size is 0.5%~2.5%.
The aspect and any possible implementation manners as described above, it is further provided a kind of implementation, the chamfering are
1/4 radius is the circular arc of 3~35mm.
Compared with prior art, the present invention can be obtained including following technical effect: crystallizer of the invention is directed to small side
Base is combined into crystallizer internal cavity using four pieces of copper sheets, by increasing changing for crystallizer and cooling water in copper sheet outer surface boiled water slot
Heat area, and then enhance the exchange capability of heat of crystallizer, so that molten steel is capable of forming centainly in crystallizer in high pulling rate
The safe solidified shell of thickness avoids deformation and bleed-out to resist ferrostatic pressure；Meanwhile copper plate/strip is tapered, so that crystallization
Device contacts well with green shell, is conducive to improve crystallizer heat exchange efficiency；Narrow copper plate has chamfering, can reduce the corner of slab
Defect.
Certainly, it implements any of the products of the present invention it is not absolutely required to while reaching all the above technical effect.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the perspective view that combined type provided by one embodiment of the present invention can repair the high pulling rate crystallizer of small billet；
Fig. 2 is the sectional view that combined type provided by one embodiment of the present invention can repair the high pulling rate crystallizer of small billet；
Fig. 3 is the top view that combined type provided by one embodiment of the present invention can repair the high pulling rate crystallizer of small billet；
Fig. 4 is the Local map of copper sheet sink provided by one embodiment of the present invention；
Fig. 5 is six kinds of shapes of the sink cross section of high pulling rate crystallizer provided by one embodiment of the present invention.
Wherein, in figure:
The face 1- wide copper sheet；2- narrow copper plate；3- sink；4- chamfering；The first taper of 51-；The second taper of 52-；53- third cone
Degree.
[specific embodiment]
For a better understanding of the technical solution of the present invention, being retouched in detail to the embodiment of the present invention with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
The present invention provides a kind of crystallizer that can be used in small billet high casting speed continuous casting production, as shown in Figure 1, using four
Block combined type copper sheet constitutes crystallizer square cavities, and copper sheet inner surface is contacted with molten steel, and outer surface is contacted with cooling water.Copper sheet
Outer surface is equipped with several sinks 3, and sink 3 is contacted with cooling water, can greatly increase the contact area of copper sheet and cooling water, in turn
Enhance crystallizer exchange capability of heat so that molten steel can also be formed in billet mould in high pulling rate it is certain thickness
Safe green shell, to resist ferrostatic pressure without deformation and bleed-out.In addition, crystallizer internal cavity is set using taper and chamfering 4
Meter, can be such that green shell and crystallizer fits closely, advantageously ensure that the heat exchange efficiency of crystallizer and the uniformity of green shell, meet slab
Quality requirement.
The shape of copper plate of crystallizer sink 3 and distribution have different designs according to slab steel grade, section and pulling rate.General feelings
Under condition, copper plate of crystallizer outer surface does not have several sinks 3, and sink 3 is uniformly distributed on copper sheet or is periodically divided with certain rule
Cloth, as shown in Figure 3 and Figure 4.3 cross-sectional shape of sink is the rectangle of opening, arc can be arranged in its root.Copper plate of crystallizer
Bottom of gullet (i.e. the bottom position of the root arc of cross sectional shape, if being not provided with arc, for the root bottom surface of rectangle) distance
Internal surface of crystallizer has certain thickness, and copper sheet is repeatedly used after reconditioning, improves steel -passing amount save the cost.Water
The minimum range δ of the bottom of slot 3 and the inner surface of copper sheet where it is 15~35mm.The width W of sink is 2~10mm, sink
Depth h be 5~30mm, the interval S between adjacent sink is 5~20mm.Trough-like shapes and depth on same copper sheet can be with
It is different.Position at crystallizer chamfering 4 is not provided with sink or setting is less than place copper sheet average water groove depth
Sink, as shown in Figure 3.
Sink cross-sectional shape can also be other shapes, such as trapezoidal, hexagon, round or ellipse, as shown in Figure 5.
Crystallizer is composed of two pieces wide face copper sheet 1 and two pieces of narrow copper plates 2, the copper of wide face copper sheet 1 and narrow copper plate 2
Plate thickness H is 40~65mm.The width of wide face copper sheet is greater than narrow copper plate, and two pieces wide face copper sheet is arranged in parallel, two pieces of leptoprosopy
Copper sheet is set between two pieces wide face copper sheet, and is each perpendicular to wide face copper sheet setting.Wide face copper sheet and narrow copper plate are isometric, and length
L is 800~1000mm.
It is equipped with arc-shaped chamfering 4 at the interior angle that Wide-surface copper plate of crystallizer 1 and narrow copper plate 2 connect, convenient for slag and is subtracted
Few slab corner defect.The set-up mode of chamfering 4 is specially entirely to be equipped with chamfering along length of mould direction.Chamfering is 1/4
Radius is the circular arc of 3~35mm.Crystallizer internal cavity band is tapered, can compensate the solidification shrinkage of green shell in time, play to green shell good
Good heat transfer and supporting role；Four pieces of copper sheets while taper having the same when preferred taper setting.Taper in the application
Is defined as: the inner surface of copper sheet has gradient relative to vertical direction, so that the inner space of entire crystallizer is provided with one
Or several frustum shapes.
Taper in the whole length of same copper sheet can be using single taper, double tapered or three tapers, such as Fig. 2 institute
Show, use the first taper 51 when single taper within the scope of whole length, first uses the first taper within the scope of whole length when double tapered
51 use the second taper 52 again, successively use the first taper 51, the second taper 52 and third when three tapers within the scope of whole length
Taper 53.The size of first taper 51, the second taper 52 and third taper 53 is 0.5%~2.5%.
Molten steel is cooling in crystallizer to generate green shell, and then shrinks and be detached from crystallizer inner wall, in green shell and crystallizer inner wall
Between form air gap.In order to reduce air gap, the capacity of heat transmission of crystallizer is improved, the growth of green shell is accelerated, when designing crystallizer,
Mouth section under crystallizer is usually made to, referred to as conical degree of crystallizer more smaller than section suitable for reading.Slab is in crystallizer different height position
The solidification shrinkage set is different, is greater than lower part in the air gap that crystallizer top generates, therefore use double tapered very when Latent Heat
It to three tapers, i.e. increase crystallizer top taper, is shunk with molten steel when compensation solidification, is more advantageous to reduction air gap and increases heat transfer energy
Power.
The calculation formula of conical degree of crystallizer is as follows
In formula
▽ --- conical degree of crystallizer, unit %/m；
l1--- crystallizer size suitable for reading, unit m；
l2--- crystallizer bottom size, unit m；
Hm--- length of mould (i.e. the taper be arranged on crystallizer length), unit m.
Billet mould of the present invention can satisfy the demand of small billet high casting speed continuous casting production, improves steel billet yield, mentions
Highly crystalline device steel -passing amount, save the cost.
The high pulling rate crystallizer of small billet can be repaired to a kind of combined type provided by the embodiment of the present application above, carried out in detail
It is thin to introduce.The description of the example is only used to help understand the method for the present application and its core ideas；Meanwhile for ability
The those skilled in the art in domain, according to the thought of the application, there will be changes in the specific implementation manner and application range, comprehensive
Upper described, the contents of this specification should not be construed as limiting the present application.
Some vocabulary has such as been used to censure specific components in specification and claims.Those skilled in the art
, it is to be appreciated that hardware manufacturer may call the same component with different nouns.Present specification and claims are not
In such a way that the difference of title is as component is distinguished, but with the difference of component functionally as the criterion of differentiation.Such as
It is an open language in "comprising", " comprising " of the specification and claims in the whole text mentioned in, therefore " packet should be construed to
Containing/including but not limited to "." substantially " refer within the acceptable error range, those skilled in the art can centainly miss
The technical problem is solved in poor range, basically reaches the technical effect.Specification subsequent descriptions be implement the application compared with
Good embodiment, so the description is being not intended to limit the scope of the present application for the purpose of the rule for illustrating the application.
The protection scope of the application is subject to view the appended claims institute defender.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Include, so that commodity or system including a series of elements not only include those elements, but also including not clear
The other element listed, or further include for this commodity or the intrinsic element of system.In the feelings not limited more
Under condition, the element that is limited by sentence "including a ...", it is not excluded that in the commodity or system for including the element also
There are other identical elements.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
Above description shows and describes several preferred embodiments of the present application, but as previously described, it should be understood that the application
Be not limited to forms disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations,
Modification and environment, and the above teachings or related fields of technology or knowledge can be passed through in application contemplated scope described herein
It is modified.And changes and modifications made by those skilled in the art do not depart from spirit and scope, then it all should be in this Shen
It please be in the protection scope of the appended claims.
Claims (10)
1. a kind of combined type can repair the high pulling rate crystallizer of small billet, which is characterized in that the crystallizer includes:
Four pieces of copper sheets, for being combined into the crystallizer shell of strip, the intracavity section of the crystallizer shell is rectangular；
Sink, set on the outer surface of the crystallizer shell, for increasing the contact area of crystallizer and cooling water；
Chamfering, the interior angle set on adjacent two pieces of copper sheet junctions, for facilitating slag and reducing slab corner defect；
Four inner surfaces of the crystallizer shell are with tapered, for compensating the solidification shrinkage of slab.
2. combined type according to claim 1 can repair the high pulling rate crystallizer of small billet, which is characterized in that the copper sheet
Thick H is 40~65mm.
3. combined type according to claim 1 can repair the high pulling rate crystallizer of small billet, which is characterized in that the sink exists
It is uniformly distributed on copper sheet or uneven distribution.
4. combined type according to claim 3 can repair the high pulling rate crystallizer of small billet, which is characterized in that the sink
Maximum width is 2~10mm, and the depth of the sink is 5~30mm, and the spacing between two neighboring sink is 5~20mm；Institute
The minimum range for stating the bottom of sink and the inner surface of copper sheet where it is 15~35mm.
5. combined type according to claim 3 or 4 can repair the high pulling rate crystallizer of small billet, which is characterized in that the water
The cross-sectional shape of slot is rectangle, trapezoidal, hexagon, round or ellipse.
6. combined type according to claim 5 can repair the high pulling rate crystallizer of small billet, which is characterized in that the sink
When cross-sectional shape is rectangle, the root of the rectangle is equipped with circular arc.
7. combined type according to claim 1 can repair the high pulling rate crystallizer of small billet, which is characterized in that the crystallizer
Length be 800~1000mm.
8. combined type according to claim 1 can repair the high pulling rate crystallizer of small billet, which is characterized in that the crystallizer
Taper using single taper, double tapered or three tapers.
9. combined type according to claim 8 can repair the high pulling rate crystallizer of small billet, which is characterized in that the taper
Size is 0.5%~2.5%.
10. combined type according to claim 1 can repair the high pulling rate crystallizer of small billet, which is characterized in that the chamfering
The circular arc for being 3~35mm for 1/4 radius.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114700472A (en) * | 2022-03-28 | 2022-07-05 | 广西钢铁集团有限公司 | Method for producing defect-free casting blank for direct rolling |
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| CN114700472B (en) * | 2022-03-28 | 2024-01-26 | 广西钢铁集团有限公司 | Production method of defect-free casting blank for direct rolling |
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