CN109794586A - A kind of crystallizer suitable for the casting of Profiled Slab CCM full guard - Google Patents
A kind of crystallizer suitable for the casting of Profiled Slab CCM full guard Download PDFInfo
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- CN109794586A CN109794586A CN201910144142.8A CN201910144142A CN109794586A CN 109794586 A CN109794586 A CN 109794586A CN 201910144142 A CN201910144142 A CN 201910144142A CN 109794586 A CN109794586 A CN 109794586A
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Abstract
The present invention provides a kind of crystallizer suitable for Profiled Slab CCM full guard casting; the upper open area of the crystallizer is greater than lower open area; the cross-sectional area of crystallizer internal cavity from top to bottom is gradually reduced; the web copper sheet of crystallizer internal cavity is the smooth surface of convex and curvature gradual change; the curvature of the web copper sheet of crystallizer internal cavity is gradually reduced from top to bottom, and the web copper sheet of crystallizer internal cavity gradually changes from convex to plane；From top to bottom, the angle in the trigonum of the edge of a wing between side copper plate and edge of a wing trigonum edge is gradually reduced crystallizer.This crystallizer is able to achieve the full guard casting of Profiled Slab CCM, solves the problems, such as the secondary oxidation in molten steel casting process, can cast and easily be oxidized the steel grade of element containing aluminium, rare earth, titanium etc., promotes the quality and added value of steel, and long service life.The probability for the defects of compression or stretcher strain do not occur for the casting blank shell produced using this crystallizer, and face crack occurs for green shell is lower.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, in particular it relates to which a kind of be suitable for Profiled Slab CCM
The crystallizer of full guard casting.
Background technique
The continuous casting of steel is that will have the liquid molten steel of certain degree of superheat by water mold continuous coo1ing at having
The process of the solid strand of certain shapes needs the casing of refractory material production for molten steel from upstream in the process
Metallurgical tank in inject crystallizer in, which is referred to as submersed nozzle.During submersed nozzle is mounted in
Between packet bottom plate and be inserted into mold liquid level hereinafter, its main function is the secondary oxidation for preventing molten steel, nitridation, splash, keep away simultaneously
The flow pattern and Temperature Distribution exempted from liquid level slag, adjust Mold, to promote the uniform nothing of the green shell in crystallizer
Defect growth, and reduce the gas in molten steel and non-metallic inclusion to the greatest extent.
As shown in attached drawing 6 of the invention, attached drawing 7, the crystallizer section configuration of Profiled Slab CCM is complicated, and crystallizer is in
Between narrow space between packet, the general unlimited pouring technology production using double sizing nozzle+semi-submersible mouths of a river, tundish application
Sizing nozzle quick-changing technology realizes the flow control of tundish to crystallizer molten steel by adjusting the diameter of sizing nozzle.Semi-submersible
The mouth of a river is supported on the edge of a wing trigonum of crystallizer using set coil support, and the diffusing of steel stream, bias current problem cause in casting process
The mouth of a river ties cold steel, to solve by adjusting the position at the semi-submersible mouth of a river or oxygen blast, crystallize caused by the centering problem at the mouth of a river
The pollution of molten steel caused by the deterioration in device flow field and the secondary oxidation problem of molten steel is that the casting pattern is insurmountable, restricts
The fundamental issue of product quality.This kind of unlimited casting pattern secondary oxidation is serious, can not cast containing the easily quilt such as aluminium, rare earth, titanium
The steel grade of oxidizing elemental constrains the exploitation of the shaped blank steel grade of excellent mechanical performance.
In existing report, has and submersed nozzle is installed at the web position of Beam Blank Mould to realize stopper+leaching
Enter the full guard casting pattern at the formula mouth of a river, but the narrower in width at Beam Blank Mould cross sectional web position, generally 70~
120mm, the arrangement mouth of a river easily leads to the mass defects such as web crackle at so narrow size positions, the reason is that flowing out from the mouth of a river
Steel flow velocity degree reach 1~3 meter per second, the molten steel quickly flowed can wash away the slab web newly solidified, cause web solidify position
Place solidifies unstable.
In existing report, has and submersed nozzle is installed at the edge of a wing triangle zone position of Beam Blank Mould to realize plug
Stick+submersed nozzle full guard casting pattern, but in a crystallizer exist two edges of a wing trigonum, two edges of a wing trigonum it
Between be closer, about 300~800mm, if being respectively mounted the submersed nozzle of stopper control in two edges of a wing trigonum, so it is short
Distance two stoppers be installed will lead to that stopper is difficult to install, if only in the immersion of edge of a wing trigonum installation stopper control
The mouth of a river, since edge of a wing trigonum is not located at the center position of crystallizer, at the corner location of crystallizer, from this to whole
In a crystallizer beam will lead to Beam Blank Mould two sides liquid steel temperature it is uneven, mold liquid level also easily fluctuates,
Slab quality is adversely affected.
In conclusion due to the narrower in width at Beam Blank Mould cross sectional web position, generally 70~120mm,
The arrangement mouth of a river easily leads to the mass defects such as web crackle at so narrow size positions, if being respectively mounted in two edges of a wing trigonum
The submersed nozzle of stopper control, it is difficult to install that so short distance two stoppers of installation will lead to stopper, so shaped blank connects
Casting machine is generally difficult to install submersed nozzle and stopper carries out full guard casting.
Production thin gauge slab mainly uses funnel-type crystallizer or lens shaped crystallizer in the world at present, crystallizer it is upper
It mouthful is infundibulate or lens shaped, crystallizer area suitable for reading is larger, in favor of the insertion of submersed nozzle and the fusing of covering slag,
The area of mouth is smaller under crystallizer, and the area of mouth is generally the 40~60% of crystallizer area suitable for reading, crystallizer under crystallizer
The perimeter of the lower mouth few 200~250mm of perimeter generally more suitable for reading than crystallizer, steel billet are compressed in the process of billet withdrawal in crystallizer
The differentiation from heavy slab to sheet billet is completed in deformation.It is horizontal but since steel billet has carried out biggish compressive deformation in crystallizer
Sectional area reduces 40~60%, and green shell section girth reduces by 200~250mm, and crystallization larger to the deformation force of steel billet application
Casting blank shell in device is very thin, easily leads to slab and face crack, surface folding and underbead crack occurs, or even crystallizer leakage occurs
Steel influences the efficient operation of continuous casting installation for casting.
The main reason for face crack, surface folding and underbead crack, occurs for its sheet billet are as follows: steel billet green shell perimeter is being tied
It is shortened in brilliant device by compression, and the compression of green shell perimeter is shortened and needs very big deformation force, deformation force is much larger than only by green shell
The power that shape changes, biggish deformation force easily make slab that face crack and underbead crack, and casting blank shell pole in crystallizer occur
Thin (being less than 10mm), easily make green shell that fold occur during the compression of green shell perimeter is shortened.
Although the presently disclosed funnel-type crystallizer or lens shaped knot for thering is production thin gauge slab to use in the prior art
Brilliant device, but without the report in terms of the crystallizer for being suitable for the casting of Profiled Slab CCM full guard.And due to funnel
Steel billet green shell perimeter in shape or lens shaped crystallizer is shortened in crystallizer by compression, easily makes slab that face crack, table occur
Face fold and underbead crack.
Summary of the invention
In view of the above problems, the present invention provides a kind of crystallizer suitable for the casting of Profiled Slab CCM full guard, to
Production: the slab of thick (70~100) the mm specification of high (350~the 450) × waist of width (400~1000) × leg, the crystallizer it is total
Width and edge of a wing thickness are adapted with the width of slab and leg height respectively, length of mould 900mm.The present invention is mainly to crystallizer
Web copper plate shape and edge of a wing trigonum on the inside of copper plate shape carry out special designing, the copper sheet design at crystallizer other positions
Using the prior art.
The upper open area of a kind of crystallizer suitable for the casting of Profiled Slab CCM full guard, the crystallizer is greater than lower mouth
Area, the cross-sectional area of crystallizer internal cavity from top to bottom are gradually reduced；The web copper sheet of crystallizer internal cavity is to the outside of crystallizer
The curvature of evagination and the smooth surface of curvature gradual change, the web copper sheet of crystallizer internal cavity is gradually reduced from top to bottom, in crystallizer
The web copper sheet of chamber gradually changes from convex to plane；From top to bottom, edge of a wing angle is gradually reduced crystallizer.
In the present invention, edge of a wing angle refers to the folder in the trigonum of the edge of a wing between side copper plate and edge of a wing trigonum edge copper sheet
Angle.
The inner surface of copper plate of crystallizer is shape described herein, is machined with cooling trough on copper plate of crystallizer, and match
Water-cooling system is covered, wherein the structure and water-cooling system of cooling trough continue to use the prior art.
Preferably, from top to bottom, the size of side copper plate and edge of a wing trigonum edge copper sheet remains unchanged in the trigonum of the edge of a wing,
The link position of side copper plate and edge of a wing trigonum edge copper sheet immobilizes in the trigonum of the edge of a wing, in the trigonum of the edge of a wing side copper plate by
Gradually close to the inside of edge of a wing trigonum, i.e. the size of edge of a wing trigonum gradually becomes smaller.
Preferably, from top to bottom, the distance between two web copper sheets of crystallizer gradually become smaller.
It is further preferred that from top to bottom, the maximum distance between two web copper sheets of crystallizer gradually becomes smaller.It is tying
Under brilliant device at mouth, two web copper sheets are parallel to each other.
Crystallizer web copper sheet is designed to the shape of convex, greatly increases the width at the insertion position of the web mouth of a river, with
The insertion at the mouth of a river is facilitated to realize the full guard casting of Profiled Slab CCM.
The difference of the crystallizer and infundibulate or lens shaped crystallizer are as follows: crystallizer is seen from above, and slab is in crystallizer
Interior cross-sectional area is gradually reduced, but section girth of the slab in crystallizer is basically unchanged, and the section girth of slab becomes
Change value is only solidification shrinkage value of the casting blank shell in crystallizer, and slab is in the deformation process of crystallizer, slab web position
Place becomes narrow gradually, slab edge of a wing trigonum area gradually becomes smaller, but the variation of shape only occurs for casting blank shell, and casting blank shell will not
Compression or stretcher strain occurs.
Preferably, in crystallizer internal cavity cross section suitable for reading, edge of a wing angle is 140~150 DEG C；Cross section in the middle part of crystallizer
In, edge of a wing angle is 125~135 DEG C, under crystallizer in the cross section of mouth, and edge of a wing angle is 110~115 DEG C.
Preferably, in crystallizer internal cavity cross section suitable for reading, the curvature of web copper sheet cross section curve is 1~5m-1, web copper
Plate cross section curve length is 300~900mm, and the maximum distance between two pieces of web copper sheet cross section curves is 150~180mm.I.e.
Increase crystallizer opening, the distance between two pieces of web copper sheets are able to satisfy the insertion of invasive nozzle completely, are able to achieve shaped blank
The full guard of conticaster is poured, and solves the problems, such as the secondary oxidation in molten steel casting process, can be cast containing the easily quilt such as aluminium, rare earth, titanium
The steel grade of oxidizing elemental promotes the quality and added value of steel.
Open area is big on crystallizer internal cavity, also helps the fusing of covering slag, can play good lubrication to crystallizer and imitate
Fruit reduces slab edge cracks odds.
Preferably, in the cross section in the middle part of crystallizer internal cavity, the curvature of web copper sheet cross section curve is 0.6~3.0m-1, abdomen
Plate copper sheet cross section curve length is 300~900mm, the maximum distance between two pieces of web copper sheet cross section curves is 110~
140mm。
Wherein, the cross section at middle part refers to the cross section at crystallizer height 1/2.
Preferably, under crystallizer internal cavity in the cross section of mouth, the curvature of web copper sheet cross section curve is 0, at web position
Copper sheet section become straight line, the distance between two pieces of web copper sheet cross section curves are 70~100mm, web copper sheet cross section curve
Length is constant, is still 300~900mm.
From top to bottom, web copper sheet cross section curve (curve on crystallizer internal cavity) length is constant, edge of a wing triangle for crystallizer
The size of side copper plate and edge of a wing trigonum edge copper sheet remains unchanged in area, therefore the perimeter base of crystallizer internal cavity varying cross-section
This is constant, but lumenal cross-section area is gradually reduced.
Beneficial effects of the present invention:
(1) shaped blank is produced using crystallizer provided by the invention, slab is basic in the section girth of crystallizer internal cavity
Constant, the section girth changing value of slab is only solidification shrinkage value of the casting blank shell in crystallizer, the cross section week of slab
With small shortening.The variation of casting blank shell shape only occurs for slab, slab web is gradually in deformation process in crystallizer
Narrow, slab edge of a wing trigonum area gradually becomes smaller, but compression or stretcher strain will not occur for casting blank shell, due to casting blank shell
Compression or stretcher strain does not occur, is not required to apply steel billet green shell biggish deformation force, casting blank shell occurs face crack etc. and lacks
Sunken probability is lower.
The solidification shrinkage value of the application meaning is the Phase change shrinkage value and slab that molten steel is generated from liquid phase to solid phase transformation
Green shell changes from high temperature to low temperature and the sum of the Heat Shrinkage value of generation.
(2) shaped blank is produced using crystallizer provided by the invention, since compression or stretcher strain do not occur for casting blank shell,
It is not required to apply biggish deformation force to steel billet green shell, for the reaction force that crystallizer is subject to regard to small, the crystallizer quantitative change that is worn is few, subtracts
Few crystallizer loss, improves the crystallizer service life.
(3) shaped blank is produced using crystallizer provided by the invention, section girth of the slab in crystallizer is substantially not
Become, the section girth changing value of slab is only solidification shrinkage value of the casting blank shell in crystallizer, due to the cross section of slab
Overall circumference is basically unchanged, and surface folding defect will not occur in shape change process for casting blank shell.
(4) use crystallizer provided by the invention, due between crystallizer two blocks of webs copper sheet cross section curve suitable for reading most
Big distance is 150~180mm, and the diameter of invasive nozzle is about 70~90mm, between two pieces of web copper sheets of the crystallizer away from
From the insertion for being able to satisfy invasive nozzle completely, it is able to achieve the full guard casting of Profiled Slab CCM, solves molten steel casting process
In secondary oxidation problem, can cast and easily be oxidized the steel grade of element containing aluminium, rare earth, titanium etc., promote the quality of steel and additional
Value.
(5) open area is big on crystallizer provided by the invention, is conducive to the fusing of covering slag, can play well to crystallizer
Lubricant effect, reduce slab edge cracks odds.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of copper plate of crystallizer inner cavity of the present invention；
Fig. 2 is the schematic diagram of crystallizer internal cavity vertical section of the present invention；
Fig. 3 is the main view of copper plate of crystallizer inner cavity of the present invention；
Fig. 4 is copper plate of crystallizer inner cavity of the present invention top view；
Fig. 5 is the left view of copper plate of crystallizer inner cavity of the present invention；
Fig. 6 is that 1 crystallizer of embodiment produces casting blank cross-section size；
Fig. 7 is the casting blank cross-section size that the crystallizer of embodiment 2 is produced.
Appended drawing reference: 1- crystallizer is suitable for reading；2- crystallizer web copper sheet；2-1- crystallizer web copper sheet suitable for reading cross section is bent
Line；2-2- crystallizer central-web copper sheet cross-section curve；Food plate copper sheet cross-section curve under 2-3- crystallizer；3-1- knot
Side copper plate upper surface in the trigonum of the brilliant device edge of a wing；Side copper plate lower end surface in the trigonum of the 3-2- crystallizer edge of a wing；The 4- crystallizer edge of a wing
Trigonum edge copper sheet；5- crystallizer internal cavity 1/2 cross section suitable for reading；1/2 cross section in the middle part of 6- crystallizer internal cavity；In 7- crystallizer
1/2 cross section of mouth under chamber；The edge of a wing trigonum position of 8- crystallizer；Mouth under 9- crystallizer；In the trigonum of the 10- crystallizer edge of a wing
Side copper plate and web copper sheet connecting line；11- be crystallizer web copper sheet in the vertical direction curvature highest point contour line (herein
The vertical direction is referred to along the crystallizer vertical direction suitable for reading to lower mouth).
Specific embodiment
The present invention is mainly to copper on the inside of the shape of the web copper sheet 2 of crystallizer (web copper sheet inner surface) and edge of a wing trigonum
The shape of plate 3 carries out special designing, and the copper sheet design at crystallizer other positions uses the prior art.The following example is pair
Further explanation of the invention, however, the present invention is not limited thereto.
As shown in Fig. 1~5,1 area suitable for reading of crystallizer of the present invention is big, 9 area of lower mouth of crystallizer is small, and crystallizer abdomen
Copper sheet 2 at Board position is designed to the shape of convex, greatly increases the width of web at the insertion position of the mouth of a river, to facilitate the mouth of a river
Insertion realize Profiled Slab CCM full guard casting.The difference of the technology and infundibulate or lens shaped crystallizer are as follows: crystallization
Device is seen from above, and cross-sectional area of the slab in crystallizer is gradually reduced, but section girth base of the slab in crystallizer
This is constant, and the section girth changing value of slab is only solidification shrinkage value of the casting blank shell in crystallizer, and slab is in crystallizer
Deformation process in, become narrow gradually at slab web position, slab edge of a wing trigonum area gradually becomes smaller, but casting blank shell is only sent out
Compression or stretcher strain will not occur for the variation of raw shape, casting blank shell.
The crystallizer is seen from above, the link position of side copper plate 3 and edge of a wing trigonum edge copper sheet 4 in the trigonum of the edge of a wing
It immobilizes, side copper plate 3 is gradually close to 12 inside of edge of a wing trigonum in the trigonum of the edge of a wing, and keeps copper on the inside of the trigonum of the edge of a wing
3 size constancy of plate.In 1/2 cross section (2/1 area of crystallizer upper surface) 5 of crystallizer internal cavity suitable for reading 1, edge of a wing trigonum
Angle between interior side copper plate 3 and edge of a wing trigonum edge 4 is 140~150 DEG C, i.e., in the trigonum of the crystallizer edge of a wing on side copper plate
Angle between 4 upper surface end face 3-1 and edge of a wing trigonum edge.(crystallizer is high for 1/2 cross section 6 in the middle part of crystallizer internal cavity
Spend the half of the cross section at 1/2) in, the angle in the trigonum of the edge of a wing between side copper plate 3 and edge of a wing trigonum edge 4 is 125
~135 DEG C, i.e., the angle between the interior middle cross section of side copper plate 3 and the middle cross section of edge of a wing trigonum edge 4.Crystallizer
Under inner cavity in 1/2 cross section 7 of mouth (2/1 area of crystallizer lower end surface), side copper plate 3 and edge of a wing trigonum in the trigonum of the edge of a wing
Angle between edge 4 is 110~115 DEG C, i.e., side copper plate lower end surface 3-2 and edge of a wing trigonum side in the trigonum of the crystallizer edge of a wing
Angle between 4 lower end surface of portion.
Crystallizer is seen from above, and in crystallizer internal cavity cross section, the curvature of edge of a wing trigonum internal layer copper sheet is remained unchanged,
But the angle between edge of a wing trigonum internal layer copper sheet 3 and edge of a wing trigonum edge 4 is gradually reduced.
The inner surface of crystallizer web copper sheet 2 be to smooth surface convex and curvature gradual change outside crystallizer, crystallizer from
On look down, the curvature of crystallizer web copper sheet 2 is gradually reduced, and the inner surface of crystallizer web copper sheet 2 is gradually from convex to flat
Face transformation, and the distance between two pieces of crystallizer web copper sheets 2 are gradually reduced, crystallizer cross section is gradually reduced.In crystallizer
In 1/2 cross section 5 of chamber suitable for reading 1, arc curvature of a curve, that is, web copper sheet cross section curve 2-1 of 2 inner surface of crystallizer web copper sheet
Curvature be 1~5m-1, the length of web copper sheet cross section curve 2-1 is 300~900mm, between two pieces of web copper sheet cross section curves
Maximum distance be 150~180mm (at this sectional position, on the inside of two web copper sheets between maximum distance).
In 1/2 cross section 6 in the middle part of crystallizer internal cavity, arc curvature of a curve, that is, web copper sheet of the inner surface of web copper sheet 2
The curvature of cross section curve 2-2 is 0.6~3m-1.Web copper sheet cross section curve 2-2 length is 300~900mm, two pieces of web copper sheets
Maximum distance between cross section curve is 110~140mm (maximum at this sectional position, between two web copper sheets insides
Distance), at this sectional position, arc curvature of a curve be less than crystallizer suitable for reading 1 1/2 cross section 5 at cross-sectional curve curvature, two
Maximum distance between a web copper sheet be less than at 1/2 cross section 5 of crystallizer suitable for reading 1 between two web copper sheets it is maximum away from
From.
Under crystallizer internal cavity in 1/2 cross section of mouth 7, the inner surface of web copper sheet 2 becomes plane, therefore, web position
The curvature of the copper sheet cross section curve 2-3 at place is 0, and the copper sheet cross section curve 2-3 at web position becomes straight line, web copper sheet section
The distance between curve 2-3 is 70~100mm (at this sectional position, the distance between on the inside of two web copper sheets).Web
Copper sheet cross section curve 2-3 length is constant, is still 300~900mm.At this sectional position, arc curvature of a curve is less than in the middle part of crystallizer
1/2 cross section 6 at cross-sectional curve curvature, the maximum distance between two web copper sheets is less than in the middle part of crystallizer 1/2 horizontal
Maximum distance at section 6 between two web copper sheets.
As shown in Figure 5, crystallizer from top to bottom, in the trigonum of the crystallizer edge of a wing side copper plate and web copper sheet connecting line 10 by
It is internally close outside crystallizer；Crystallizer web copper sheet inner surface in the vertical direction curvature highest point contour line 11 also by
Gradually by internally close outside crystallizer.Finally under crystallizer at mouth 9, two lines overlapping passes through in same horizontal line, that is, exists
Under crystallizer at mouth, the section of web copper sheet becomes rectangle.
Side copper plate 3 (gradual change of edge of a wing angle) and molten steel are quiet in the crystallizer web copper sheet 2 of curvature gradual change, edge of a wing trigonum
Under the synergistic effect of pressure, slab becomes narrow gradually in crystallizer operational process median ventral plate, and web thickness reduces 50% or more, simultaneously
The section girth for meeting slab is constant.The angle of side copper plate 3 and crystallizer edge of a wing trigonum edge copper sheet 4 in the trigonum of the edge of a wing
From top to bottom from large to small.
Maximum distance between crystallizer two blocks of webs copper sheet cross section curve suitable for reading is 150~180mm, invasive nozzle
Diameter is about 70~90mm, and the distance between two pieces of web copper sheets of the crystallizer are able to satisfy the insertion of invasive nozzle, energy completely
The full guard casting for realizing Profiled Slab CCM, solves the problems, such as the secondary oxidation in molten steel casting process, can cast and contain aluminium, dilute
Soil, titanium etc. are easily oxidized the steel grade of element.
Embodiment 1
Slab shown in fig. 6, casting blank cross-section size are produced using crystallizer provided by the present application are as follows: 550mm (L1) ×
440mm (H1) × 70mm (D1), conticaster pulling rate are 1.2~1.5m/min.This crystallizer is suitable for Profiled Slab CCM all risk insurance
The crystallizer of casting is protected, the overall width and edge of a wing thickness of the crystallizer are adapted with the width of slab and leg height respectively, crystallization
Length on device vertical direction is 900mm.The present invention is mainly to copper on the inside of the web copper plate shape of crystallizer and edge of a wing trigonum
Plate shape carries out special designing, and the copper sheet design at crystallizer other positions uses the prior art.It is machined on copper plate of crystallizer
Cooling trough, and mating water-cooling system, wherein the structure and water-cooling system of cooling trough continue to use the prior art.
As shown in Fig. 1~5, which is that upper open area is big, lower open area is small makes the structural schematic diagram of the crystallizer
Type, and the copper sheet at crystallizer web position is designed to the shape of convex, greatly increases the width of web at the insertion position of the mouth of a river
Degree, to facilitate the insertion at the mouth of a river to realize the full guard casting of Profiled Slab CCM.The technology and infundibulate or lens shaped crystallizer
Difference are as follows: crystallizer is seen from above, and cross-sectional area of the slab in crystallizer is gradually reduced, but slab is in crystallizer
Section girth is basically unchanged, and the section girth changing value of slab is only solidification shrinkage value of the casting blank shell in crystallizer,
Slab becomes narrow gradually, slab edge of a wing trigonum area gradually becomes smaller in the deformation process of crystallizer at slab web position, but
The variation of shape only occurs for casting blank shell, and compression or stretcher strain will not occur for casting blank shell.
The moulding of the crystallizer are as follows: crystallizer is seen from above, side copper plate and edge of a wing trigonum edge in the trigonum of the edge of a wing
The link position of copper sheet immobilizes, and as axis, in the trigonum of the edge of a wing side copper plate gradually to edge of a wing trigonum internal rotating,
Meanwhile the curvature of web copper sheet 2 reduces, and keeps side copper plate size constancy, web copper sheet 2 and edge of a wing triangle in the trigonum of the edge of a wing
The tie point of side copper plate 3 is also therewith as close inside crystallizer in area.In the cross section 5 suitable for reading of crystallizer 1, in the trigonum of the edge of a wing
Angle between side copper plate 3 and edge of a wing trigonum edge 4 is 150 DEG C, in the cross section 6 in the middle part of crystallizer, in the trigonum of the edge of a wing
Angle between side copper plate 3 and edge of a wing trigonum edge 4 is 135 DEG C, under crystallizer in the cross section 7 of mouth, in the trigonum of the edge of a wing
Angle between side copper plate 3 and edge of a wing trigonum edge 4 is 115 DEG C.
Crystallizer web copper sheet 2 is the smooth surface of convex and curvature gradual change, and crystallizer is seen from above, crystallizer abdomen
The curvature of plate copper sheet 2 is gradually reduced, and crystallizer web copper sheet 2 gradually changes from convex to plane, and two blocks of crystallizer web copper
The distance between plate 2 is gradually reduced.In crystallizer cross section 5 suitable for reading, the curvature of web copper sheet cross section curve 2-1 is 5m-1,
Web copper sheet cross section curve 2-1 length is 300mm, and the maximum distance between two pieces of web copper sheet cross section curve 2-1 is 180mm；
In cross section 6 in the middle part of crystallizer, the curvature of web copper sheet cross section curve 2-2 is 3m-1, web copper sheet cross section curve 2-2 length
For 300mm, the maximum distance between two pieces of web copper sheet cross section curve 2-2 is 120mm；Under crystallizer in the cross section 7 of mouth, abdomen
The curvature of copper sheet cross section curve 2-3 at Board position is 0m-1, the curve in the copper sheet section at web position becomes straight line, and two pieces
The distance between web copper sheet cross section curve 2-3 is 70mm.Web copper sheet cross section curve length is constant, is still 300mm.
Side copper plate 3 (edge of a wing angle constantly changes) and steel in the crystallizer web copper sheet 2 of curvature gradual change, edge of a wing trigonum
Under the synergistic effect of hydrostatic pressure, from top to bottom, slab the distance in crystallizer in operational process between two webs gradually
Narrow, the thickness of slab reduces 61%, while the section girth for meeting slab is constant.
Maximum distance between crystallizer two blocks of webs copper sheet cross section curve suitable for reading is 180mm, the diameter of invasive nozzle
About 70mm, the distance between two pieces of web copper sheets of the crystallizer are able to satisfy the insertion of invasive nozzle completely, are able to achieve abnormity
The full guard of billet continuous casting machine is poured, and solves the problems, such as the secondary oxidation in molten steel casting process, can be cast containing aluminium, rare earth, titanium etc. easily
It is oxidized the steel grade of element.
Production practices show to produce shaped blank using crystallizer of the present invention, since open area is big on crystallizer, crystallization
Device covering slag molten state is good, and crystallizer leptoprosopy transverse direction overall width suitable for reading is larger, facilitates the insertion at the mouth of a river, the mouth of a river is from slab
Green shell still has the distance greater than 50mm, and the molten steel flowed out from the mouth of a river will not wash away casting blank shell, is able to achieve all risk insurance in casting process
Shield casting, since the section girth of slab is constant, casting blank shell only deforms, and does not occur to compress or stretch, crystallizer is given
The deformation force for giving casting blank shell is small, casting blank shell surface flawless, and mold copper plate wear amount is small, and crystallizer steel -passing amount reaches
35000 tons or more are just replaced.
Embodiment 2
Slab shown in Fig. 7, casting blank cross-section size are as follows: 1023.8mm are produced using crystallizer provided in this embodiment
(L1) × 390mm (H1) × 90mm (D1), conticaster pulling rate are 0.9~1.0m/min.
The present embodiment provides a kind of crystallizer suitable for Profiled Slab CCM full guard casting, the beam overalls of the crystallizer
Degree and edge of a wing thickness are adapted with the width of slab and leg height respectively, and the length on crystallizer vertical direction is 900mm.This implementation
Mainly the shape of side copper plate 3 carries out special designing, crystallizer to example in the shape to the web copper sheet 2 of crystallizer and edge of a wing trigonum
Copper sheet design at other positions uses the prior art.Cooling trough, and mating water-cooling system are machined on copper plate of crystallizer,
Wherein the structure and water-cooling system of cooling trough continue to use the prior art.
The structural schematic diagram of the crystallizer is as shown in Fig. 1~5, the moulding of the crystallizer are as follows: 1 area suitable for reading of crystallizer
Greatly, 9 area of lower mouth of crystallizer is small, and the copper sheet 2 at crystallizer web position is designed to the shape of convex, greatly increases water
The width of web at mouth insertion position, to facilitate the insertion at the mouth of a river to realize the full guard casting of Profiled Slab CCM.The technology with
The difference of infundibulate or lens shaped crystallizer are as follows: crystallizer is seen from above, and cross-sectional area of the slab in crystallizer gradually subtracts
It is small, but section girth of the slab in crystallizer is basically unchanged, and the section girth changing value of slab is only that casting blank shell exists
Solidification shrinkage value in crystallizer, slab become narrow gradually, the slab edge of a wing in the deformation process of crystallizer at slab web position
Trigonum area gradually becomes smaller, but the variation of shape only occurs for casting blank shell, and compression or stretcher strain will not occur for casting blank shell.
The moulding of the crystallizer are as follows: crystallizer is seen from above, side copper plate 3 and edge of a wing trigonum edge in the trigonum of the edge of a wing
The link position of copper sheet 4 immobilizes, and as axis, and side copper plate 3 is gradually to inside edge of a wing trigonum 12 in the trigonum of the edge of a wing
Rotation, meanwhile, the curvature of web copper sheet 2 reduces, and keeps 3 size constancy of side copper plate, web copper sheet 2 and the wing in the trigonum of the edge of a wing
The tie point of side copper plate 3 is also therewith as close inside crystallizer in edge trigonum.In the cross section 5 of crystallizer suitable for reading 1, the edge of a wing three
Angle in angular region between side copper plate 3 and edge of a wing trigonum edge 4 is 140 DEG C, in the cross section 6 in the middle part of crystallizer, the edge of a wing three
Angle in angular region between side copper plate 3 and edge of a wing trigonum edge 4 is 125 DEG C, under crystallizer in the cross section 7 of mouth, the edge of a wing three
Angle in angular region between side copper plate 3 and edge of a wing trigonum edge 4 is 110 DEG C.
Crystallizer web copper sheet 2 is the smooth surface of convex and curvature gradual change, and crystallizer is seen from above, crystallizer abdomen
The curvature of plate copper sheet 2 is gradually reduced, and crystallizer web copper sheet 2 gradually changes from convex to plane, and two blocks of crystallizer web copper
The distance between plate 2 is gradually reduced.In the cross section 5 of crystallizer suitable for reading 1, the curvature of web copper sheet cross section curve 2-1 is 1m-1,
Web copper sheet cross section curve 2-1 length is 900mm, and the maximum distance between two pieces of web copper sheet cross section curve 2-1 is 150mm；
In cross section 6 in the middle part of crystallizer, the curvature of web copper sheet cross section curve 2-2 is 0.6m-1, web copper sheet cross section curve 2-2 long
Degree is 900mm, and the maximum distance between two pieces of web copper sheet cross section curve 2-2 is 115mm；Under crystallizer in the cross section of mouth 7,
The curvature of copper sheet cross section curve 2-3 at web position is 0, and the copper sheet section 2-3 at web position becomes straight line, two blocks of webs
The distance between copper sheet cross section curve 2-3 is 90mm.Web copper sheet cross section curve 2-3 length is constant, is still 900mm.
Side copper plate 3 (edge of a wing angle constantly changes) and steel in the crystallizer web copper sheet 2 of curvature gradual change, edge of a wing trigonum
Under the synergistic effect of hydrostatic pressure, slab becomes narrow gradually in the distance in crystallizer operational process between two webs, slab abdomen
The thickness of plate reduces 40%, while the section girth for meeting slab is constant.
Maximum distance between crystallizer two blocks of webs copper sheet cross section curve suitable for reading is 150mm, the diameter of invasive nozzle
About 90mm, the distance between two pieces of web copper sheets of the crystallizer are able to satisfy the insertion of invasive nozzle completely, are able to achieve abnormity
The full guard of billet continuous casting machine is poured, and solves the problems, such as the secondary oxidation in molten steel casting process, can be cast containing aluminium, rare earth, titanium etc. easily
It is oxidized the steel grade of element
Production practices show to produce shaped blank using crystallizer of the present invention, since open area is big on crystallizer, crystallization
Device covering slag molten state is good, and crystallizer leptoprosopy transverse direction overall width suitable for reading is larger, facilitates the insertion at the mouth of a river, the mouth of a river is from slab
Green shell still has the distance greater than 30mm, and the molten steel flowed out from the mouth of a river will not wash away casting blank shell, is able to achieve all risk insurance in casting process
Shield casting, since the section girth of slab is constant, casting blank shell only deforms, and does not occur to compress or stretch, crystallizer is given
The deformation force for giving casting blank shell is small, casting blank shell surface flawless, and mold copper plate wear amount is small, and crystallizer steel -passing amount reaches
55000 tons or more are just replaced.
Claims (7)
1. the upper open area of a kind of crystallizer suitable for Profiled Slab CCM full guard casting, the crystallizer is greater than lower mouth
Area, the cross-sectional area of crystallizer internal cavity from top to bottom are gradually reduced, which is characterized in that the web copper sheet of crystallizer internal cavity be to
Convex and curvature gradual change smooth surface, the curvature of the web copper sheet of crystallizer internal cavity are gradually reduced from top to bottom outside crystallizer,
Crystallizer web copper sheet gradually changes from convex to plane；Crystallizer from top to bottom, side copper plate and the edge of a wing three in the trigonum of the edge of a wing
Angle between the edge copper sheet of angular region is gradually reduced.
2. a kind of crystallizer suitable for Profiled Slab CCM full guard casting according to claim 1, feature exist
In from top to bottom, the size of side copper plate and edge of a wing trigonum edge copper sheet remains unchanged crystallizer in the trigonum of the edge of a wing, the edge of a wing three
The link position of side copper plate and edge of a wing trigonum edge copper sheet immobilizes in angular region, side copper plate gradually guide vane in the trigonum of the edge of a wing
Close inside edge trigonum, the size of edge of a wing trigonum gradually becomes smaller.
3. a kind of crystallizer suitable for Profiled Slab CCM full guard casting according to claim 1, feature exist
In from top to bottom, the distance between two web copper sheets gradually become smaller crystallizer.
4. described in any item a kind of crystallizers suitable for Profiled Slab CCM full guard casting according to claim 1~3,
It is characterized in that, in crystallizer cross section suitable for reading, in the trigonum of the edge of a wing between side copper plate and edge of a wing trigonum edge copper sheet
Angle is 140~150 DEG C；In cross section in the middle part of crystallizer, side copper plate and edge of a wing trigonum edge copper sheet in the trigonum of the edge of a wing
Between angle be 125~135 DEG C, under crystallizer in the cross section of mouth, side copper plate and edge of a wing trigonum side in the trigonum of the edge of a wing
Angle between portion's copper sheet is 110~115 DEG C.
5. a kind of crystallizer suitable for Profiled Slab CCM full guard casting according to claim 1, feature exist
In in crystallizer internal cavity cross section suitable for reading, the curvature of web copper sheet cross section curve is 1~5m-1, web copper sheet cross section curve is long
Degree is 300~900mm, and the maximum distance between two pieces of web copper sheet cross section curves is 150~180mm.
6. a kind of crystallizer suitable for Profiled Slab CCM full guard casting according to claim 1, feature exist
In in the cross section in the middle part of crystallizer internal cavity, the curvature of web copper sheet cross section curve is 0.6~3.0m-1, web copper sheet section song
Line length is 300~900mm, and the maximum distance between two pieces of web copper sheet cross section curves is 110~140mm.
7. a kind of crystallizer suitable for Profiled Slab CCM full guard casting according to claim 1, feature exist
In under crystallizer internal cavity in the cross section of mouth, the curvature of web copper sheet cross section curve is 0, and the copper sheet section at web position becomes
For straight line, the distance between two pieces of web copper sheet cross section curves are 70~100mm, and web copper sheet cross section curve length is constant, is
300~900mm.
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| CN109794586B (en) | 2023-10-03 |
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