CN105057613B - A kind of sheet billet continuous casting chamber crystallizer narrow-surface copper - Google Patents
A kind of sheet billet continuous casting chamber crystallizer narrow-surface copper Download PDFInfo
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Abstract
The invention discloses a kind of sheet billet continuous casting chamber crystallizer narrow-surface coppers, and including great Mian Qu and side chamfered region, the bosh of the one or more up/down perforations of back setting of the great Mian Qu and side chamfering, the sectional side elevation of the big face area working face is polyline shaped.Molten steel steel billet during solidification, which is more advantageous to, under chamfering effect is close to crystallizer inner wall always.
Description
Technical field
The present invention relates to metal freezing and continuously casting technical field, more particularly to a kind of sheet billet continuous casting chamfer crystallizer is narrow
Face copper coin.
Background technology
With the development of world's metallurgical technology, modern continuous casting technology is constantly progressive, and the steel grade that can cast constantly expands, some are high
Alloy, high-quality, high crack sensitivity steel grade are constantly produced in large iron and steel enterprise continuous casting flow.This its
In one of main technological progress be big cross section strand continuous casting technology development.The development of big cross section strand continuous casting technology, steel
Compression ratio increase, the product qualities of steel improves.But the adverse effect that the increase of casting blank section is brought is exactly：It is being cast in strand
It needs to be bent in machine, align, thus can bring the increase of strand corner crack.The especially strand of Slab Caster in recent years
Thickness has reached more than 250-450mm thickness, and bloom and big rectangular bloom thickness are even more to have reached more than 350-500mm, by
Inhomogeneous cooling in corner is even, and the stress concentration in bending, straightening process certainly will lead to the increase of strand corner crack.
Chinese invention patent ZL02214026.3（Notification number CN2547438Y, title " continuous casting crystallizer for plate billet narrow side copper
Plate ") a kind of narrow face copper plate of crystallizer with side chamfering, chamfer dimesion 6-10mm are provided, angle is 45 degree.It should
Patent does not have the type of cooling for pointing out side chamfering, is unfavorable for the consistency that product cools down on a horizontal plane.
The patent of CN201744629Y discloses a kind of narrow copper plate of continuous casting combination mould, it is ensured that the side of narrow copper plate
The cooling effect in surface chamfer region, the crackle for avoiding strand corner.But molten steel body in crystallization process is not considered enough
The problem of long-pending diminution is brought, the volume of contraction can cause the inner wall of the steel billet and crystallizer narrow boards of the lower part of crystallizer to lead
The phenomenon that heat is bad occurs.In order to avoid cracking defect in the steel plate edge subsequently rolled, generally require to there are corners
Transverse crack and the continuous casting steel billet of longitudinal corner crack defect carry out corner cut processing, but this not only substantially increases production cost, and
And production efficiency is also reduced, seriously affect iron and steel enterprise's logistics and change release delivery date.
On the other hand, well known the problem of security consideration, difficulty of processing and cost, crystallizer is steel billet continuously casting
The quality of key equipment, design and manufacture directly influences the normal of continuous casting with stablizing, copper plate of crystallizer difficulty of processing
It well imagines, therefore irregular or special-shaped copper plate of crystallizer（The especially copper plate of crystallizer with cambered surface）Processing is even more processor
Awe-inspiring, another aspect processing cost and safety are the major reasons that crystallizer is hindered to be promoted to more rational structure.
It hinders the fast development of crystallizer or even hinders the formation of the thinking of person of ordinary skill in the field's divergence form.
Invention content
Molten steel is more advantageous to the purpose of the present invention is to overcome the above shortcomings and to provide one kind under chamfering effect solidifying
During steel billet be close to the sheet billet continuous casting chamber crystallizer narrow-surface copper of crystallizer inner wall always.
In order to solve the above technical problems, the technical solution adopted in the present invention is as described below：
A kind of sheet billet continuous casting chamber crystallizer narrow-surface copper, including great Mian Qu and side chamfered region, the great Mian Qu and side
The bosh of the one or more up/down perforations of back setting of surface chamfer, the sectional side elevation of the big face area working face is broken line
Shape.
Further, the polyline shaped is made of the first broken line, vertical line.
Further, the angle between first broken line and narrow copper plate side is 0.2~10 degree.
Further, the angle between first broken line and narrow copper plate side is 0.5~1.2 degree.
Further, the length of first broken line is the 10~31% of copper plate of crystallizer height.
Further, angles of the angle a between the working face of vertical line side chamfered region and narrow copper plate side.
Further, angles of the angle a1 between the working face of the first broken line side chamfered region and narrow copper plate side.
Further, the side chamfered region chamfer angle a is 30~70 degree.Further, the height of the side chamfering a
Spend 30%~52% that H is the narrow copper plate integral thickness.
Further, the height H of the side chamfering a is the 40%~43% of the narrow copper plate integral thickness.
Further, the side chamfered region chamfer angle a1 is 73~82 degree.
Further, the side chamfered region chamfer angle a1 is 73~79 degree.Further, the side chamfering a1
Height H1 is the 40%~43% of the narrow copper plate integral thickness.
The oblique water of straight water seam and both sides of the narrow copper plate of the present invention also comprising middle part stitches, oblique water seam and crystallizer leptoprosopy copper
The angle in plate level face is 45~90 °, the top and copper coin that the distance in oblique water seam top and the hot face of narrow copper plate is stitched close to straight water
The distance in hot face.Further, the polyline shaped is made of the first broken line, vertical line, using primary oblique structure, is on the one hand tied
Structure is simple, easy processing, later stage are also easy to clear up and safeguard, on the other hand suitably increases the taper on crystallizer top, can avoid
Gap between casting blank shell and the hot face of copper coin ensures the close contact between casting blank shell and the hot face of copper coin, is conducive to casting blank shell
Homoepitaxial.Further, the angle b between first broken line and narrow copper plate side be 0.2~10 degree, described first
The length of broken line is the 10~31% of copper plate of crystallizer height.The present inventor by experimental studies have found that, when the folder of the first broken line
Angle is 0.5~1.2 degree, and when the length of broken line is the 10~31% of copper plate of crystallizer height, the hot face of copper plate of crystallizer is most
Close to the shape of casting blank solidification shrinking law, and what is more important can largely ensure green shell and the hot face of copper coin
Good contact is using equal cooling device and identical cooling tank structure, above-mentioned meander line structure and broken line using the present invention
Length, cooling efficiency are 1.25 times not using meander line structure and broken line length, and slab quality is significantly improved, casting speed
It is 1.32 times not using the above scheme；What is more important, when the length of broken line is the 29~31% of copper plate of crystallizer height,
When with above-mentioned function, suitable broken line length also is able to reduce the abrasion between casting blank shell and the hot face of copper coin, improves copper coin
Service life, the service life of copper coin is not using the above scheme 1.5 times.Further, angle a falls for vertical line side
Angle between the working face of angular region and narrow copper plate side, angle a1 are the working face and leptoprosopy of the first broken line side chamfered region
Angle between copper coin side, the side chamfered region chamfer angle a are 30~70 degree.Chamfering, which is less than 30 degree, corner to be caused to become
Point is elongated, and oblique sink is bad to the cooling effect of chamfered area, while larger stress can be generated at wedge angle position, reduces copper coin
Service life；When α is more than 70 °, chamfered area temperature can be caused to rise unobvious.Further, side chamfered region chamfering
Angle a1 is 73~82 degree, and the side chamfered region chamfer angle a is 65~70 degree and broken line length using the present invention, is allowed
For people surprisingly during strand moves down, squeezing action slightly is played in the lower part of narrow boards, ensures casting blank shell
Close contact between the hot face of copper coin, the homoepitaxial of casting blank shell form complete, all round closure green shell.Further,
The height H of the side chamfering is the 22%~32% of the narrow copper plate integral thickness.What currently available technology generally used falls
Angular zone height H is the 2%~20% of entire copper coin width, and chamfered area height H can also be used as entire copper coin width in the present invention
2%~20%, effect is better than the prior art, but effect does not reach expected, and those skilled in the art generally believe that H is higher than
20% can cause chamfered area temperature to rise excessively high, the region casting blank shell thinner thickness, increase the danger of corner crack and bleed-out newly, and
At this time due to having generated air gap between the hot face of chamfered area copper coin and casting blank shell, but the present invention is by adjusting chamfering, broken line angle
Degree and broken line length, the temperature of chamfered area, which rises, will not accelerate, while can make casting blank shell corner Temperature Distribution evenly, corner
Be not in crackle and bleed-out；Further, the height H of the side chamfering be the narrow copper plate integral thickness 40%~
43%, the height H of the side chamfering are the 40%~43% of the narrow copper plate integral thickness, when strand moves down process
In, squeezing action slightly is played at the both ends of strand, ensures the close contact between casting blank shell and the hot face of copper coin, casting blank shell
Homoepitaxial, complete, all round closure green shell can be formed, the corner of casting blank shell is not in crackle.Further,
The side chamfered region chamfer angle a1 is 76~79 degree, and good squeezing action can be played to molten steel, ensures to be formed complete
, the green shell of all round closure.
Compared with prior art, the beneficial effects of the present invention are：
The narrow copper plate with side chamfering that the present invention realizes, it is ensured that chamfering cooling effect avoids strand corner from splitting
Line, and the service life and slab quality of narrow copper plate and side chamfering can be improved.The corner of the sheet billet of narrow copper plate cast
Portion is rectangular shaped, is on the one hand easily worked that cost is low, on the other hand combines the broken line length of the present invention and angle strand corner
The temperature higher in portion, the temperature higher and cross direction profiles of strand corner evenly, the stress that is subject in bending and straightening process
Smaller can effectively inhibit the generation of strand angle transverse fissure, improve strand corner temperature and coagulation forming during conduct heat it is uniform
Property, and reduce bending and stress concentration that straightening process sheet billet corner is subject to, the final corner for eliminating microalloying steel grade
Crack defect, while be conducive to extend the service life of narrow copper plate.Green shell and the hot face of copper coin are ensured using polyline shaped structure
Good contact is conducive to improve casting speed.
Description of the drawings
The sheet billet continuous casting chamber crystallizer narrow-surface copper that Fig. 1 is the present invention indulges schematic cross-sectional view；
Fig. 2 is the schematic cross-sectional view of the first line department of sheet billet continuous casting chamber crystallizer narrow-surface copper of the present invention；
Fig. 3 is the schematic cross-sectional view in the sheet billet continuous casting chamber crystallizer narrow-surface copper vertical line portion of the present invention.
Specific embodiment
Embodiment 1：As shown in Figure 1, 2, 3, a kind of sheet billet continuous casting chamber crystallizer narrow-surface copper, including great Mian areas 3 and side
The bosh of the one or more up/down perforations of back setting of surface chamfer area 2, the great Mian Qu and side chamfering, the big face
The sectional side elevation of area working face is polyline shaped.The polyline shaped is made of the first broken line, vertical line.First broken line and leptoprosopy copper
Angle between 1 side of plate is 6 degree.The length of first broken line is the 22% of copper plate of crystallizer height.Angle a is vertical line
Angle between the working face of side chamfered region and narrow copper plate side.Angle a1 is the working face of the first broken line side chamfered region
With the angle between narrow copper plate side.The side chamfered region chamfer angle a is 30 degree.The height H of the side chamfering a is
The 37% of the narrow copper plate integral thickness.The side chamfered region chamfer angle a1 is 73 degree.The height of the side chamfering a1
H1 is the 37% of the narrow copper plate integral thickness.Technical solution slab cooling efficiency using embodiment 1 is not use broken line knot
1.22 times of structure and broken line length, slab quality is significantly improved, and casting speed is 1.30 times not using the above scheme；More
Importantly, suitable broken line length also is able to reduce the abrasion between casting blank shell and the hot face of copper coin, to improve the use of copper coin
Service life, the service life of copper coin are not using the above scheme 1.4 times.
Embodiment 2：As shown in Figure 1, 2, 3, a kind of sheet billet continuous casting chamber crystallizer narrow-surface copper, including great Mian areas 3 and side
The bosh of the one or more up/down perforations of back setting of surface chamfer area 2, the great Mian Qu and side chamfering, the big face
The sectional side elevation of area working face is polyline shaped.The polyline shaped is made of the first broken line, vertical line, first broken line and leptoprosopy copper
Angle between 1 side of plate is 10 degree, and the length of first broken line is the 31% of copper plate of crystallizer height, further, angle
Angles of a between the working face of vertical line side chamfered region and narrow copper plate side is spent, angle a1 falls for the first broken line side
Angle between the working face of angular region and narrow copper plate side, the side chamfered region chamfer angle a are 70 degree, and the side is fallen
The height H of angle a is the 52% of the narrow copper plate integral thickness, and the height H1 of the side chamfering a1 is whole thick for the narrow copper plate
The 52% of degree, the side chamfered region chamfer angle a1 are 82 degree.It is not using the technical solution slab cooling efficiency of embodiment 2
Using 1.23 times of meander line structure and broken line length, slab quality is significantly improved, and casting speed is not using the above scheme
1.31 times；What is more important, suitable broken line length also are able to reduce the abrasion between casting blank shell and the hot face of copper coin, improve
The service life of copper coin, the service life of copper coin are not using the above scheme 1.42 times.
Embodiment 3：As shown in Figure 1, 2, 3, a kind of sheet billet continuous casting chamber crystallizer narrow-surface copper, including great Mian areas 3 and side
The bosh of the one or more up/down perforations of back setting of surface chamfer area 2, the great Mian Qu and side chamfering, the big face
The sectional side elevation of area working face is polyline shaped.The polyline shaped is made of the first broken line, vertical line.First broken line and leptoprosopy copper
Angle between 1 side of plate is 7 degree.The length of first broken line is the 27% of copper plate of crystallizer height.Angle a is vertical line
Angle between the working face of side chamfered region and narrow copper plate side.Angle a1 is the working face of the first broken line side chamfered region
With the angle between narrow copper plate side.The side chamfered region chamfer angle a is 65 degree.The height H of the side chamfering a is
The 40% of the narrow copper plate integral thickness.The side chamfered region chamfer angle a1 is 73 degree.The height of the side chamfering a1
H1 is the 40% of the narrow copper plate integral thickness.Technical solution slab cooling efficiency using embodiment 3 is not use broken line knot
1.36 times of structure and broken line length, slab quality is significantly improved, and casting speed is 1.42 times not using the above scheme；More
Importantly, suitable broken line length also is able to reduce the abrasion between casting blank shell and the hot face of copper coin, to improve the use of copper coin
Service life, the service life of copper coin are not using the above scheme 1.53 times.
Real-time example 4：As shown in Figure 1, 2, 3, a kind of sheet billet continuous casting chamber crystallizer narrow-surface copper, including great Mian areas 3 and side
The bosh of the one or more up/down perforations of back setting of surface chamfer area 2, the great Mian Qu and side chamfering, the big face
The sectional side elevation of area working face is polyline shaped.The polyline shaped is made of the first broken line, vertical line.First broken line and leptoprosopy copper
Angle between 1 side of plate is 0.5 degree.The length of first broken line is the 26% of copper plate of crystallizer height.Angle a is vertical
Angle between the working face in line side surface chamfer area and narrow copper plate side.Angle a1 is the work of the first broken line side chamfered region
Angle between face and narrow copper plate side.The side chamfered region chamfer angle a is 68 degree.The height H of the side chamfering a
43% for the narrow copper plate integral thickness.The side chamfered region chamfer angle a1 is 76 degree.The height of the side chamfering a1
Spend 43% that H1 is the narrow copper plate integral thickness.Technical solution slab cooling efficiency using embodiment 4 is not use broken line
1.39 times of structure and broken line length, slab quality is significantly improved, and casting speed is 1.48 times not using the above scheme；
What is more important, suitable broken line length also are able to reduce the abrasion between casting blank shell and the hot face of copper coin, improve making for copper coin
With the service life, the service life of copper coin is not using the above scheme 1.52 times.
Embodiment 5：As shown in Figure 1, 2, 3, a kind of sheet billet continuous casting chamber crystallizer narrow-surface copper, including great Mian areas 3 and side
The bosh of the one or more up/down perforations of back setting of surface chamfer area 2, the great Mian Qu and side chamfering, the big face
The sectional side elevation of area working face is polyline shaped.The polyline shaped is made of the first broken line, vertical line.First broken line and leptoprosopy copper
Angle between 1 side of plate is 1.2 degree.The length of first broken line is the 29% of copper plate of crystallizer height.Angle a is vertical
Angle between the working face in line side surface chamfer area and narrow copper plate side.Angle a1 is the work of the first broken line side chamfered region
Angle between face and narrow copper plate side.The side chamfered region chamfer angle a is 70 degree.The height H of the side chamfering a
42% for the narrow copper plate integral thickness.The height H1 of the side chamfering a1 is the 42% of the narrow copper plate integral thickness.
The side chamfered region chamfer angle a1 is 75 degree.Crystallizer plate and backboard pass through spiral shell that backboard is passed through to be connect with copper plate of crystallizer
Bolt can be set with special sealing pad in bolt, and the formula of the sealing washer special basic composition is：30-50 parts of graphite powder, propylene
60-80 parts of acid esters rubber, 2-3 parts of vulcanizing agent, 2-4 parts of anti-aging agent, fibrous zeopan 10-20 parts；Tackifying resin
10-20 parts, above-mentioned is parts by weight.Example 1：The formula of the sealing washer special basic composition is：30 parts of graphite powder, acrylate rubber
60 parts of glue, 2 parts of vulcanizing agent, 2 parts of anti-aging agent, fibrous 10 parts of zeopan；10 parts of tackifying resin, above-mentioned is parts by weight.
Example 2：50 parts of graphite powder, 80 parts of acrylic rubber, 3 parts of vulcanizing agent, 4 parts of anti-aging agent, fibrous 20 parts of zeopan；
20 parts of tackifying resin, above-mentioned is parts by weight.When being placed in water long at high temperature using gasket made of above-described embodiment material
Between impregnate after, more preferably, temperature is not interfered at 1200 degree for sealability, heat-resisting, the still more present gasket seal of compression durability
Performance, service life are 3 times of conventional seals gasket.It will not leak using 3 years.Using the technical solution slab cooling of embodiment 5
Efficiency is 1.41 times not using meander line structure and broken line length, and slab quality is significantly improved, and casting speed is not use
1.54 times of said program；What is more important, suitable broken line length also are able to reduce between casting blank shell and the hot face of copper coin
Abrasion, improves the service life of copper coin, the service life of copper coin is not using the above scheme 1.6 times.
Embodiment 6：As shown in Figure 1, 2, 3, a kind of sheet billet continuous casting chamber crystallizer narrow-surface copper, including great Mian areas 3 and side
The bosh of the one or more up/down perforations of back setting of surface chamfer area 2, the great Mian Qu and side chamfering, the big face
The sectional side elevation of area working face is polyline shaped.The polyline shaped is made of the first broken line, vertical line.First broken line and leptoprosopy copper
Angle between 1 side of plate is 1 degree.The length of first broken line is the 29% of copper plate of crystallizer height.Angle a is vertical line
Angle between the working face of side chamfered region and narrow copper plate side.Angle a1 is the working face of the first broken line side chamfered region
With the angle between narrow copper plate side.The side chamfered region chamfer angle a is 70 degree.The height H of the side chamfering a is
The 41% of the narrow copper plate integral thickness.The height H1 of the side chamfering a1 is the 42% of the narrow copper plate integral thickness.Institute
It is 75 degree to state side chamfered region chamfer angle a1.Crystallizer plate and backboard pass through spiral shell that backboard is passed through to be connect with copper plate of crystallizer
Bolt can smear Special seal material in bolt or gap, and Special seal glue material includes, according to mass fraction meter, formula composition
For：80~120 parts of neoprene；Fibrous 10~16 parts of zeopan；10~20 parts of tackifying resin；Vulcanization accelerator
0.5~3 part, 10~15 parts of graphite powder；20~35 parts of sepiolite powder；70~180 parts of function solvent, the function solvent are acetic acid
Ethyl ester and No. 120 solvent naphthas, its ratio be 3:1, example 1：Special seal glue material includes, according to mass fraction meter, formula composition
For：80 parts of neoprene；Fibrous 10 parts of zeopan；10 parts of tackifying resin；0.5 part of vulcanization accelerator, graphite powder 10
Part；20 parts of sepiolite powder；70 parts of function solvent, the function solvent are ethyl acetate and No. 120 solvent naphthas, and its ratio be 3:
1.Example 2：Special seal glue material includes, and according to mass fraction meter, formula composition is：120 parts of neoprene；Fibrous magnalium silicon
16 parts of hydrochlorate；20 parts of tackifying resin；3 parts of vulcanization accelerator, 15 parts of graphite powder；35 parts of sepiolite powder；180 parts of function solvent,
The function solvent is ethyl acetate and No. 120 solvent naphthas, and its ratio be 3:1.Example 3：Special seal glue material includes, according to
Mass fraction meter, formula composition are：Neoprene:100 parts；Fibrous 13 parts of zeopan；15 parts of tackifying resin；Vulcanization
2 parts of accelerating agent, 12 parts of graphite powder；28 parts of sepiolite powder；100 parts of function solvent, the function solvent are ethyl acetate and No. 120
Solvent naphtha, its ratio be 3:1, vulcanization accelerator uses rhenocure CA, is had using sealing material made of above-described embodiment
Very high adhesion strength, good elastic recovery rate and excellent flame retardant property has good creep properties and excellent water proofing property again
Can, construction method is simple, and construction efficiency is high, need to only be coated in screw hole and bolt on, and sealing material high temperature resistant, and 1300
Working condition is spent without influencing efficiency, it will not leak using 2 years.It is using the technical solution slab cooling efficiency of embodiment 6
1.51 times of meander line structure and broken line length are not used, and slab quality is significantly improved, and casting speed is not use above-mentioned side
1.58 times of case；What is more important, suitable broken line length also are able to reduce the abrasion between casting blank shell and the hot face of copper coin, carry
The service life of high copper coin, the service life of copper coin are not using the above scheme 1.65 times.
Claims (3)
1. a kind of sheet billet continuous casting chamber crystallizer narrow-surface copper, including great Mian Qu and side chamfered region, the great Mian Qu and side
The bosh of the one or more up/down perforations of back setting of chamfering, the sectional side elevation of the big face area working face is polyline shaped,
The polyline shaped is made of the first broken line, vertical line, it is characterised in that：Folder between first broken line and narrow copper plate side
Angle is 0.2~10 degree, and the length of first broken line is the 10~31% of copper plate of crystallizer height, and the first broken line side is fallen
Angle between the working face of angular region and narrow copper plate side is a1, and the a1 is 75 degree, further includes bolt and special sealing pad
Piece, narrow face copper plate of crystallizer are special in bolt suit by the way that the bolt of backboard and narrow face copper plate of crystallizer is passed through to connect with backboard
Gasket seal, the formula of the sealing washer special basic composition is：30-50 parts of graphite powder, 60-80 parts of acrylic rubber, sulphur
2-3 parts of agent, 2-4 parts of anti-aging agent, fibrous zeopan 10-20 parts, 10-20 parts of tackifying resin, above-mentioned is parts by weight.
2. sheet billet continuous casting chamber crystallizer narrow-surface copper as described in claim 1, it is characterised in that：First broken line with it is narrow
Angle between the copper coin side of face is 0.5~1.2 degree.
3. sheet billet continuous casting chamber crystallizer narrow-surface copper as described in claim 1, it is characterised in that：Chamfering a is vertical line side
Angle between the working face in surface chamfer area and narrow copper plate side, the chamfering a are 30~70 degree.
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