WO2024087976A1 - 一种凸型弧面连铸结晶器窄面铜板及其使用方法 - Google Patents
一种凸型弧面连铸结晶器窄面铜板及其使用方法 Download PDFInfo
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- WO2024087976A1 WO2024087976A1 PCT/CN2023/120958 CN2023120958W WO2024087976A1 WO 2024087976 A1 WO2024087976 A1 WO 2024087976A1 CN 2023120958 W CN2023120958 W CN 2023120958W WO 2024087976 A1 WO2024087976 A1 WO 2024087976A1
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- WIPO (PCT)
- Prior art keywords
- copper plate
- working surface
- narrow copper
- cooling water
- narrow
- Prior art date
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 225
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 225
- 239000010949 copper Substances 0.000 title claims abstract description 225
- 238000009749 continuous casting Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 19
- 208000029154 Narrow face Diseases 0.000 title abstract description 23
- 230000007423 decrease Effects 0.000 claims abstract description 12
- 239000000498 cooling water Substances 0.000 claims description 117
- 238000001816 cooling Methods 0.000 claims description 28
- 230000007547 defect Effects 0.000 abstract description 14
- 238000005096 rolling process Methods 0.000 abstract description 13
- 230000008859 change Effects 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 3
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 101000827703 Homo sapiens Polyphosphoinositide phosphatase Proteins 0.000 description 2
- 241000357293 Leptobrama muelleri Species 0.000 description 2
- 102100023591 Polyphosphoinositide phosphatase Human genes 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 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
- B22D11/055—Cooling the moulds
-
- 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
- B22D11/059—Mould materials or platings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the present application relates to the field of continuous casting of crystallizers, and in particular to a narrow copper plate of a convex curved continuous casting crystallizer and a method for using the same.
- Continuously cast slabs are the main base materials for producing high-performance medium and thick plates and wide and thick plates.
- the high-temperature molten steel solidifies in a crystallizer consisting of two water-cooled wide copper plates with cooling water troughs on the back and two water-cooled narrow copper plates with cooling water troughs on the back, thereby forming a solidified slab shell with a certain shape and excellent surface quality.
- the billet is drawn downward, it gradually solidifies completely in the secondary cold casting stream to form a billet with qualified quality, shape and size.
- the narrow face shape of the continuous casting slab is an important factor affecting the evolution of the edge morphology of the intermediate slab during the plate rolling process.
- the narrow face of the flat or nearly flat slab gradually undergoes a transformation from flat to double-stranded to single-stranded.
- the narrow face of the intermediate slab gradually turns up and down to the edge of the steel plate.
- the narrow face rolling process of the intermediate slab is very easy to form a "drawing" morphology defect, which leads to the formation of fine linear crack defects, and then the narrow face of the intermediate slab turns up and down to the edge of the steel plate to form a steel plate edge crack defect. If the narrow face of the slab produced by the continuous casting process forms a bulge, it will further increase the width of the narrow face of the intermediate slab turning to the edge of the steel plate, further deteriorating the edge quality of the steel plate.
- the utility model patent No. 201520673254.X and the invention patent No. 201610796688.8 both disclose a method for preparing a narrow concave structure slab using a crystallizer copper plate with a convex block structure in the middle of the narrow working surface.
- the narrow copper plate of the crystallizer designed by the two patents has a circular arc surface with a radius of 150 to 300 mm and a convex height of 5 to 12 mm in the middle of the working surface, and the convex arc surface is The transition surface tangent to it transitions to the base surface on both sides of the edge of the copper plate.
- a narrow concave billet with a right-angle structure can be prepared, which can reduce the significant width edge crack defects formed during the rolling process of wide and thick plates to a certain extent.
- a wide transition zone needs to be designed, so that the width of the arc convex surface left for the narrow copper plate in the horizontal middle area of the crystallizer is very narrow, which causes the convex amount of the arc surface in the horizontal middle of the narrow copper plate to become very concentrated, that is, the convex structure changes too fast, which will cause the narrow face of the cast billet produced by the crystallizer to change too fast, and it is easy to form a nearly "triangular" concave structure billet on the narrow face of the cast billet.
- the edge of the intermediate billet in the rolling process of this type of cast billet is very easy to form a significant double-strand shape defect. Especially when the width ratio is large, it is easy to cause large-size folding defects on the edge of the steel plate.
- the width of the arc convex surface in the transverse middle area of the new narrow copper plate needs to be wide enough to avoid the arc surface convexity changing too much to form a nearly "triangular" concave structure on the narrow surface of the ingot.
- the present application provides a convex curved surface continuous casting crystallizer narrow surface copper plate and a method of using the same.
- a convex curved surface continuous casting crystallizer narrow copper plate wherein the narrow copper plate comprises a working surface, and the working surface comprises:
- second working surfaces there are two second working surfaces, one of which is arranged on one side of the first working surface, and the other second working surface is arranged on the other side of the first working surface, and the two second working surfaces are arranged opposite to each other;
- the first working surface is connected to two of the second working surfaces respectively, the connection between the first working surface and the second working surface is a first connecting line, and there are two first connecting lines;
- the cross-section of the first working surface is a convex arc, and the first working surface extends from the upper opening of the narrow copper plate to the lower opening of the narrow copper plate.
- the height of the first working surface protruding relative to the plane where the two first connecting lines are located gradually decreases from the upper opening of the narrow copper plate to the lower opening of the narrow copper plate.
- the plane where the upper opening of the narrow copper plate is located is parallel to the plane where the lower opening of the narrow copper plate is located.
- the maximum vertical distance between the first working surface and the plane where the two first connecting lines are located in the plane where the upper opening of the narrow copper plate is located is the first length of the upper opening
- the maximum vertical distance between the first working surface and the plane where the two first connecting lines are located in the plane where the lower opening of the narrow copper plate is located is the first length of the lower opening
- the vertical distance between the plane where the upper opening of the narrow copper plate is located and the plane where the lower opening of the narrow copper plate is located is 780-1200 mm, and the difference between the first length of the upper opening and the first length of the lower opening is 0.2-4 mm.
- the width of the upper opening of the narrow copper plate is greater than the width of the lower opening of the narrow copper plate.
- the second working surface extends from the upper end of the narrow copper plate to the lower end of the narrow copper plate, and the distance between the outer edge line of the second working surface and the first connecting line remains unchanged from the upper end of the narrow copper plate to the lower end of the narrow copper plate.
- the second working surface includes an upper side working surface and a lower side working surface
- the upper opening side working surface is connected to the lower opening side working surface, and the upper opening side working surface and the lower opening side working surface are arranged in sequence along the direction from the upper opening of the narrow copper plate to the lower opening of the narrow copper plate;
- the upper working surface is a straight surface
- the lower working surface is an inclined surface
- the lower working surface is inclined in a direction opposite to the protruding direction of the first working surface
- the narrow copper plate includes a cooling surface, the cooling surface includes a side plane, the side plane is arranged opposite to the second working surface, and the side plane and the upper side working surface are arranged in parallel;
- the lower opening side working surface comprises a first vertex, the first vertex is located on the lower opening connection line between the lower opening side working surface and the narrow copper plate, and the first vertex is arranged away from the first connection line;
- the vertical distance between the first vertex and the side plane is the shortest vertical distance between the lower opening side working surface and the side plane.
- the distance from the upper opening side working surface extending from the upper opening of the narrow copper plate to the lower opening side working surface is a second length
- the second length occupies the plane where the upper opening of the narrow copper plate is located and the plane where the lower opening of the narrow copper plate is located. 25% to 75% of the vertical distance between the planes.
- the narrow copper plate includes a fastening hole, a first cooling water groove and a second cooling water groove;
- the fastening holes are arranged in a plurality of rows, and the plurality of rows of fastening holes are arranged symmetrically along the vertical central axis of the narrow copper plate;
- the first cooling water groove and the second cooling water groove are arranged between two adjacent rows of the fastening holes, two first cooling water grooves are arranged, and a plurality of second cooling water grooves are arranged, two first cooling water grooves are arranged adjacent to the two rows of the fastening holes respectively, and a plurality of second cooling water grooves are located between the two first cooling water grooves;
- the bottom of the first cooling water trough is closer to the first working surface than the bottom of the adjacent second cooling water trough; the bottoms of a plurality of the second cooling water troughs are located on the same arc surface.
- a cross section of the first working surface located in a plane where the upper-side working surface and the lower-side working surface meet is a reference convex arc
- the convex arc lines of the cross-sections of the arc surfaces where the groove bottoms of the plurality of second cooling water grooves are located are arranged parallel to the reference convex arc lines.
- a method for using a narrow copper plate of a convex curved surface continuous casting crystallizer wherein the crystallizer is formed by using the narrow copper plate of a convex curved surface continuous casting crystallizer as described above;
- cooling water is passed into the cooling water trough of the narrow copper plate.
- the flow rate of the cooling water in the cooling water trough of the narrow copper plate is greater than or equal to 6 m/s, and the inlet and outlet temperature difference of the cooling water in the cooling water trough of the narrow copper plate is 5 to 9°C.
- the first working surface of the present application is set as a convex arc surface.
- the direct connection between the first working surface and the second working surface makes the width of the first working surface wide enough and the convex change of the first working surface small, thereby avoiding the large convex change of the first working surface causing the narrow surface of the ingot to form a nearly "triangular" concave structure, thereby reducing the probability of forming significant width edge crack defects and significant double-strand shape defects during the continuous casting slab rolling process.
- FIG1 is a schematic diagram of the installation structure of a narrow copper plate in a crystallizer according to an embodiment of the present application
- FIG2 is a schematic diagram of the structure of a narrow copper plate according to an embodiment of the present application.
- FIG3 is a schematic diagram of the side structure of the working surface of the lower opening side of a narrow copper plate according to an embodiment of the present application
- FIG4 is a schematic diagram of the cooling surface structure of a narrow copper plate according to an embodiment of the present application.
- FIG5 is a schematic diagram of the cross-sectional structure of a narrow copper plate at the junction of an upper side working surface and a lower side working surface according to an embodiment of the present application;
- FIG. 6 is a schematic diagram of the cross-sectional structure of a narrow copper plate at the junction of an upper side working surface and a lower side working surface according to another embodiment of the present application.
- the present embodiment introduces a narrow copper plate of a convex curved continuous casting crystallizer.
- the narrow copper plate 100 includes working surfaces, which include: a first working surface 1 and a second working surface; two second working surfaces are provided, one second working surface is provided on one side of the first working surface 1, and the other second working surface is provided on the other side of the first working surface 1, and the two second working surfaces are arranged opposite to each other; the first working surface 1 is connected to the two second working surfaces respectively, and the connection between the first working surface 1 and the second working surface is a first connecting line L1 , and two first connecting lines L1 are provided; the cross-section of the first working surface 1 is a convex curved line, and the first working surface 1 extends from the upper opening 4 of the narrow copper plate to the lower opening 5 of the narrow copper plate, and the height of the first working surface 1 protruding relative to the plane where the two first connecting lines L1 are located gradually decreases from the upper opening 4 of the narrow copper plate to the lower opening 5 of the narrow copper plate.
- the crystallizer includes two wide copper plates 200 and two narrow copper plates 100.
- the crystallizer where the narrow copper plates 100 are located is used for continuous casting to produce a right-angle narrow concave slab 300 with a thickness of 175 to 650 mm.
- the upper opening 4 of the narrow copper plate is located at the upper end of the narrow copper plate 100
- the lower opening 5 of the narrow copper plate is located at the lower end of the narrow copper plate 100.
- the working surface is the contact side of the solidified shell.
- the first working surface 1 is a convex arc surface, which protrudes toward the inner cavity of the crystallizer.
- the height of the first working surface 1 relative to the plane where the two first connecting lines L 1 are located refers to the distance that the first working surface 1 extends toward the inner cavity of the crystallizer.
- the two second working surfaces are located on both sides of the first working surface 1, and the two second working surfaces are symmetrically arranged along the vertical central axis of the first working surface 1. It can be understood that the vertical central axis of the two narrow copper plates 100 are coplanar.
- connection between the first working surface 1 and the second working surface forms a first connecting line L 1
- the two second working surfaces and the first working surface 1 form two first connecting lines L 1
- the height of the first working surface 1 protruding relative to the plane where the two first connecting lines L 1 are located gradually decreases from the upper opening 4 of the narrow copper plate to the lower opening 5 of the narrow copper plate.
- no transition surface is set between the first working surface 1 and the two second working surfaces.
- the direct connection between the first working surface 1 and the second working surface makes the width of the first working surface 1 wide enough, and the convex change of the first working surface 1 is small, so that the slab 300 has a wide arc concave structure, which avoids the large convex change of the first working surface 1 causing the narrow surface of the cast slab to form a nearly "triangular" concave structure, and reduces the probability of forming significant width edge line crack defects and significant double-strand shape defects in the continuous casting slab rolling process.
- the slab 300 has a right-angle structure, ensuring that the corner temperature of the cast slab 300 in the second cold casting flow will not be too low, so that the corner transverse cracks of the slab 300 during the continuous casting process can be controlled.
- the crystallizer using this narrow copper plate 100 can use a larger taper for continuous casting production, so that the corner structure grains of the slab 300 formed by solidification are finer, thereby reducing the generation of transverse cracks at the corners of the slab 300, and also significantly reducing the wear of the first working surface 1 in the vicinity of the lower mouth 5 of the narrow copper plate, thereby extending the service life of the narrow copper plate 100.
- the plane where the upper opening 4 of the narrow copper plate is located is parallel to the plane where the lower opening 5 of the narrow copper plate is located; the maximum vertical distance between the first working surface 1 and the plane where the two first connecting lines L1 are located in the plane where the upper opening 4 of the narrow copper plate is located is the upper opening first length l1 ; the maximum vertical distance between the first working surface 1 and the plane where the two first connecting lines L1 are located in the plane where the lower opening 5 of the narrow copper plate is located is the lower opening first length; the vertical distance between the plane where the upper opening 4 of the narrow copper plate is located and the plane where the lower opening 5 of the narrow copper plate is located is 780-1200 mm, and the difference between the upper opening first length l1 and the lower opening first length is 0.2-4 mm.
- the height direction of the narrow copper plate 100 is the highest point of the first working surface 1 at each height is located on the vertical central axis plane of the narrow copper plate 100.
- the first length l1 of the upper opening is 8 to 40 mm, and the maximum vertical distance between the first working surface 1 and the plane where the two first connecting lines L1 are located at other heights decreases linearly from the upper opening 4 of the narrow copper plate to the lower opening 5 of the narrow copper plate until it decreases to the first length of the lower opening.
- the width of the upper opening 4 of the narrow copper plate is the fifth length l 5
- the fifth length l 5 indicates the width direction of the narrow copper plate 100
- the width of the lower opening 5 of the narrow copper plate is the sixth length l 6.
- the fifth length l 5 is 1 to 4 mm longer than the sixth length l 6 , and along the direction from the upper opening 4 of the narrow copper plate to the lower opening 5 of the narrow copper plate, the fifth length l 5 decreases linearly to the sixth length l 6 .
- the second working surface extends from the upper opening 4 of the narrow copper plate to the lower opening 5 of the narrow copper plate, and the distance between the outer edge of the second working surface and the first connecting line L 1 is a fourth length l 4 , and the fourth length l 4 remains unchanged from the upper opening 4 of the narrow copper plate to the lower opening 5 of the narrow copper plate.
- the fourth length l 4 is 10 to 50 mm.
- the thickness of the slab 300 refers to the direction indicated by the distance between the two wide copper plates 200.
- the second working surface includes an upper side working surface 2 and a lower side working surface 3, the upper side working surface 2 and the lower side working surface 3 are connected, and the upper side working surface 2 and the lower side working surface 3 are arranged in sequence along the direction from the upper opening 4 of the narrow copper plate to the lower opening 5 of the narrow copper plate; the upper side working surface 2 is a straight surface, and the lower side working surface 3 is an inclined surface, and the lower side working surface 3 is inclined in the direction opposite to the convex direction of the first working surface 1.
- the lower side working surface 3 has four edges, including the outer edge line L 2 of the lower side working surface, the first connecting line L 1 , the lower edge line of the lower side working surface, and the upper edge line of the lower side working surface, the lower edge line of the lower side working surface is the intersection line of the lower side working surface 3 and the lower opening 5 of the narrow copper plate, and the upper edge line of the lower side working surface is the intersection line of the lower side working surface 3 and the upper side working surface 2.
- the lower mouth side working surface 3 gradually inclines from the first connecting line L1 to the outer edge line L2 of the lower mouth side working surface toward the direction of the extension surface away from the upper mouth side working surface 2.
- the lower mouth side working surface 3 gradually inclines from the upper edge line of the lower mouth side working surface to the lower edge line of the lower mouth side working surface toward the direction of the extension surface away from the upper mouth side working surface 2.
- the narrow copper plate 100 includes a cooling surface 6, which is arranged opposite to the working surface, and a cooling water trough is provided on the cooling surface 6 for cooling the continuous casting slab 300;
- the cooling surface 6 includes a side plane, which is arranged opposite to the second working surface, and the side plane is arranged parallel to the upper mouth side working surface 2;
- the lower mouth side working surface 3 includes a first vertex O2 , and the first vertex O2 is located on the connecting line between the lower mouth side working surface 3 and the lower mouth 5 of the narrow copper plate, and the first vertex O2 is arranged away from the first connecting line L1 ;
- the vertical distance between the first vertex O2 and the side plane is the shortest vertical distance between the lower mouth side working surface 3 and the side plane.
- the first vertex O2 is the intersection of the lower edge line of the lower mouth side working surface and the outer edge line L2 of the lower mouth side working surface
- the vertical distance between the first vertex O2 and the side plane is the seventh length l7
- the vertical distance between the upper mouth side working surface 2 and the side plane is the third length l3
- the length difference between the third length l3 and the seventh length l7 is the eighth length l8 .
- the third length l3 is 35-45 mm
- the eighth length l 8 is 0.25-4 mm.
- the value of the eighth length l 8 should be greater than or equal to the difference between the first length l 1 of the upper opening and the first length l 1 of the lower opening.
- the cooling surface 6 includes two side planes and a middle curved surface; as shown in FIG. 6 , in another embodiment, the cooling surface 6 includes two side planes and a middle plane.
- the upper side working surface 2 has four edges, including the outer edge line of the upper side working surface, the first connecting line L1 , the lower edge line of the upper side working surface and the upper edge line of the upper side working surface, the lower edge line of the upper side working surface is the intersection line of the lower side working surface 3 and the upper side working surface 2, the upper edge line of the upper side working surface is the intersection line of the upper side working surface 2 and the upper opening 4 of the narrow copper plate, the outer edge line of the upper side working surface is the edge line parallel to the first connecting line L1 and arranged oppositely, and the outer edge line of the upper side working surface and the outer edge line L2 of the lower side working surface are connected at the first endpoint O1 .
- the second working surface includes the upper side working surface 2 and the lower side working surface 3
- the lower side working surface 3 includes the outer edge line L2 of the lower side working surface
- the upper side working surface 2 includes the outer edge line of the upper side working surface
- the outer edge line of the upper side working surface and the outer edge line L2 of the lower side working surface are connected to form the outer edge line of the second working surface.
- the distance between the outer edge line of the second working surface and the first connecting line L1 is the fourth length l4 , and the fourth length l4 remains unchanged from the upper opening 4 of the narrow copper plate to the lower opening 5 of the narrow copper plate.
- the distance between the two first connection lines L1 along the width direction of the narrow copper plate 100 decreases linearly from the upper opening 4 of the narrow copper plate to the lower opening 5 of the narrow copper plate, and the distance between the two first connection lines L1 in the plane of the upper opening 4 of the narrow copper plate along the width direction of the narrow copper plate 100 is 1 to 4 mm longer than the distance between the two first connection lines L1 in the plane of the lower opening 5 of the narrow copper plate along the width direction of the narrow copper plate 100.
- the inclined lower opening side working surface 3 reduces the solidification shrinkage compensation amount of the lower opening of the crystallizer to the slab 300, further reduces the wear of the slab 300 on the lower opening 5 of the narrow copper plate when preparing the slab 300, and improves the service life of the narrow slab 300.
- the distance from the upper opening side working surface 2 extending from the upper opening 4 of the narrow copper plate to the lower opening side working surface 3 is a second length l 2 ; the second length l 2 accounts for 25% to 75% of the vertical distance between the plane where the upper opening 4 of the narrow copper plate is located and the plane where the lower opening 5 of the narrow copper plate is located.
- the vertical distance between the plane where the upper opening 4 of the narrow copper plate is located and the plane where the lower opening 5 of the narrow copper plate is located is 780 to 1200 mm.
- the second length l2 depends on the height of the device and the continuous casting speed.
- the second length l2 is generally 250-600mm.
- the narrow copper plate 100 includes a fastening hole 7, a first cooling water trough 8 and a second cooling water trough 9;
- the fastening holes 7 are arranged in multiple rows, and the multiple rows of fastening holes 7 are arranged symmetrically along the vertical central axis of the narrow copper plate 100;
- the first cooling water trough 8 and the second cooling water trough 9 are arranged between two adjacent rows of fastening holes 7, two first cooling water troughs 8 are arranged, and multiple second cooling water troughs 9 are arranged, and the first cooling water trough 8 and the second cooling water trough 9 are both extended along the height direction of the narrow copper plate 100.
- Two first cooling water troughs 8 are respectively arranged adjacent to the two rows of fastening holes 7, and multiple second cooling water troughs 9 are located between the two first cooling water troughs 8; the bottom of the first cooling water trough 8 is closer to the first working surface 1 than the bottom of the adjacent second cooling water trough 9; the bottoms of the multiple second cooling water troughs 9 are located on the same arc surface.
- the cooling surface 6 is provided with fastening holes 7, a first cooling water trough 8, a second cooling water trough 9 and an inclined water trough 10, and the fastening holes 7 are bolt holes.
- the width direction is the length extension direction of the fifth length l 5.
- the cooling surface 6 is provided with two to four rows of fastening holes 7 in its width direction, which are used to fix the narrow copper plate 100 to the stainless steel back plate of the crystallizer.
- the first cooling water trough 8, the second cooling water trough 9 and the inclined water trough 10 are evenly distributed along the width direction of the narrow copper plate 100, and the first cooling water trough 8, the second cooling water trough 9 and the inclined water trough 10 have the same groove width.
- the first cooling water trough 8 and the second cooling water trough 9 are vertically recessed in the direction of the plane where the two first connecting lines L 1 are located, and the inclined water trough 10 is inclined and recessed in the middle direction of the second working surface.
- the angle between the axis of the inclined water trough 10 and the upper working surface 2 is ⁇ 1
- ⁇ 1 is generally 65-80°.
- two first cooling water grooves 8 and multiple second cooling water grooves 9 are arranged between two adjacent rows of fastening holes 7.
- the two first cooling water grooves 8 and multiple second cooling water grooves 9 here refer to the first cooling water grooves 8 and the second cooling water grooves 9 between two adjacent rows of fastening holes 7. Therefore, multiple first cooling water grooves 8, multiple second cooling water grooves 9 and two inclined water grooves 10 are provided on the entire cooling surface 6, and the multiple first cooling water grooves 8, multiple second cooling water grooves 9 and two inclined water grooves 10 are symmetrically arranged along the vertical central axis plane of the narrow copper plate 100.
- the first cooling water trough 8 , the second cooling water trough 9 and the inclined water trough 10 all have a trough bottom 11 , and the trough bottom 11 is a semicircular structure.
- the cross-section of the first working surface 1 located in the plane where the upper working surface 2 and the lower working surface 3 are connected is a reference convex arc line L3 ;
- the convex arc line L4 of the cross-section of the arc surface where the groove bottom 11 of the plurality of second cooling water grooves 9 is located is arranged parallel to the reference convex arc line L3 .
- the plane where the upper working surface 2 and the lower working surface 3 meet is the cross section of the narrow copper plate 100 at the height of the first end point O1 .
- the convex arc L4 of the cross section of the arc surface where the groove bottom 11 of the plurality of second cooling water grooves 9 is located is obtained by translating 20 to 30 mm vertically toward the cooling surface 6 with reference to the convex arc L3 .
- a vertical distance between the bottom of the second cooling water groove 9 and the bottom of the first cooling water groove 8 adjacent thereto is a ninth length l 9 .
- the ninth length l 9 is 1 to 3 mm.
- the structure and arrangement of the first cooling water trough 8, the second cooling water trough 9 and the inclined water trough 10 ensure uniform heat transfer of the narrow copper plate 100 of the crystallizer in the width direction.
- This embodiment also introduces a crystallizer, which adopts the narrow copper plate 100 of the convex curved continuous casting crystallizer as described above.
- a crystallizer which adopts the narrow copper plate 100 of the convex curved continuous casting crystallizer as described above.
- the distance between the upper openings 4 of the two narrow copper plates 100 is greater than the distance between the lower openings 5 of the two narrow copper plates 100, so that the crystallizer forms a structure that is wide at the top and narrow at the bottom, and has a certain inverted taper.
- the taper of the crystallizer is 1.05% to 1.35%.
- This embodiment also introduces a method for using a narrow copper plate 100 of a convex curved continuous casting crystallizer.
- cooling water is passed into the cooling water trough of the narrow copper plate 100.
- the amount of cooling water of the narrow copper plate 100 varies depending on the structure of the trough.
- the flow rate of the cooling water in the cooling water trough of the narrow copper plate 100 is greater than or equal to 6 m/s, and the inlet and outlet temperature difference of the cooling water in the cooling water trough of the narrow copper plate 100 is 5 to 9°C.
- the cooling water troughs of the narrow copper plate 100 refer to the first cooling water trough 8, the second cooling water trough 9 and the inclined water trough 10.
- the amount of cooling water varies according to the structure of the trough.
- the flow rate of the cooling water in the cooling water trough of the narrow copper plate 100 is greater than or equal to 6m/s, and the inlet and outlet temperature difference of the cooling water in the cooling water trough is 5 to 9°C.
- the first working surface 1 and the second working surface can be set to prepare a narrow concave slab 300 with a right-angle structure, ensuring that the width of the edge crack during the rolling process of the cast slab in the middle/wide and thick plate is controlled within 20 mm from the edge, and at the same time, it can also ensure that the corner temperature of the slab 300 during the solidification process in the second cold casting flow is close to the corner temperature of the traditional right-angle continuous casting slab 300, and the high incidence of cracks in the corners of the slab 300 is controlled; the slab 300 prepared by the narrow copper plate 100 of this embodiment has a wide arc in the middle of the narrow side
- the concave structure eliminates the narrow face folding defect caused by the rolling of the severely transitional concave billet that has been published; in this embodiment, since the wear at the lower mouth 5 of the narrow face copper plate is reduced, the service life of the narrow face copper plate 100 is significantly improved; the narrow face copper plate 100 of this embodiment is used for continuous casting to produce the slab 300, which can ensure that
- a convex curved crystallizer narrow copper plate 100 for continuously casting a slab 300 with a thickness of 300 mm has a height of 900 mm, a fifth length l 5 of the width of an upper opening 4 of the narrow copper plate is 316 mm, a sixth length l 6 of the width of a lower opening 5 of the narrow copper plate is 314 mm, a length difference between the fifth length l 5 and the sixth length l 6 is 2 mm, and the width of the narrow copper plate 100 gradually decreases linearly from the fifth length l 5 to the sixth length l 6 from the upper opening 4 of the narrow copper plate to the lower opening 5 of the narrow copper plate, as shown in FIG. 2 .
- the narrow copper plate 100 includes a working surface on the side in contact with the solidified shell and a cooling surface 6 with a cooling water tank opposite to the working surface.
- the working surface of the narrow copper plate 100 is divided into second working surfaces on both sides and a first working surface 1 in the middle in the width direction.
- the connecting line of the second working surfaces on both sides and the first working surface 1 in the middle is the first connecting line L 1 .
- the second working surface is divided into an upper side working surface 2 and a lower side working surface 3 in the height direction of the narrow copper plate 100, as shown in FIG. 2 .
- the upper side working surface 2 and the lower side working surface 3 on both sides are symmetrically distributed with the vertical central axis plane of the narrow copper plate 100 as the symmetry line.
- the upper side working surface 2 has four edges, including the outer edge of the upper side working surface, the first connection line L 1 , the lower edge of the upper side working surface and the upper edge of the upper side working surface.
- the lower edge of the upper side working surface is the intersection of the lower side working surface 3 and the upper side working surface 2.
- the upper edge of the upper side working surface is the intersection of the upper side working surface 2 and the upper opening 4 of the narrow copper plate.
- the outer edge of the upper side working surface is the edge parallel to the first connection line L 1.
- the distance between the outer edge of the upper side working surface and the first connection line L 1 is the fourth length l 4 , and the fourth length l 4 is 30 mm.
- the lower mouth side working surface 3 has four sides, including the outer edge line L2 of the lower mouth side working surface, the first connecting line L1 , the lower edge line of the lower mouth side working surface and the upper edge line of the lower mouth side working surface.
- the lower edge line of the lower mouth side working surface is the intersection line of the lower mouth side working surface 3 and the lower mouth 5 of the narrow copper plate
- the upper edge line of the lower mouth side working surface is the intersection line of the lower mouth side working surface 3 and the upper mouth side working surface 2.
- the distance between the outer edge line L2 of the lower mouth side working surface and the first connecting line L1 is the fourth length l4 , and the fourth length l4 is 30mm.
- the outer edge line L2 of the lower opening side working surface and the outer edge line of the upper opening side working surface are connected at the first end point O1 .
- the upper side working surface 2 is a plane structure, and the distance between the upper side working surface 2 and the side plane of the cooling surface 6 is the third length l 3 , which is 40 mm.
- the height of the upper side working surface 2 is the second length l 2 extending from the upper opening 4 of the narrow copper plate to the lower side working surface 3, which is 450 mm.
- the narrow copper plate 100 includes a cooling surface 6, which is arranged opposite to the working surface.
- a cooling water trough is provided on the cooling surface 6 for cooling the continuous casting slab 300;
- the cooling surface 6 includes a side plane, which is arranged opposite to the second working surface, and the side plane is arranged parallel to the upper mouth side working surface 2;
- the lower mouth side working surface 3 includes a first vertex O2 , and the first vertex O2 is located on the connecting line between the lower mouth side working surface 3 and the lower mouth 5 of the narrow copper plate, and the first vertex O2 is arranged away from the first connecting line L1 ;
- the vertical distance between the first vertex O2 and the side plane is the shortest vertical distance between the lower mouth side working surface 3 and the side plane.
- the first vertex O2 is the intersection of the lower edge line of the lower mouth side working surface and the outer edge line L2 of the lower mouth side working surface
- the vertical distance between the first vertex O2 and the side plane is the seventh length l7
- the vertical distance between the upper mouth side working surface 2 and the side plane is the third length l3
- the length difference between the third length l3 and the seventh length l7 is the eighth length l8 .
- the third length l3 is 40mm and the eighth length l8 is 0.5mm.
- the lower mouth side working surface 3 gradually inclines from the first connecting line L1 to the outer edge line L2 of the lower mouth side working surface toward the direction of the extension surface away from the upper mouth side working surface 2. At the same time, the lower mouth side working surface 3 gradually inclines from the upper edge line of the lower mouth side working surface to the lower edge line of the lower mouth side working surface toward the direction of the extension surface away from the upper mouth side working surface 2.
- the first working surface 1 is a convex arc surface, protruding toward the inner cavity of the crystallizer.
- the two second working surfaces are located on both sides of the first working surface 1.
- the two second working surfaces are symmetrically arranged along the vertical central axis of the first working surface 1. It can be understood that the vertical central axis of the two narrow copper plates 100 are coplanar.
- the connection between the first working surface 1 and the second working surface forms a first connecting line L 1.
- the two second working surfaces and the first working surface 1 form two first connecting lines L 1.
- the height of the first working surface 1 protruding relative to the plane where the two first connecting lines L 1 are located gradually decreases from the upper opening 4 of the narrow copper plate to the lower opening 5 of the narrow copper plate.
- the maximum vertical distance between the first working surface 1 and the plane where the two first connecting lines L 1 are located in the plane where the upper opening 4 of the narrow copper plate is located is the first length of the upper opening.
- the length l 1 of the upper opening is 12 mm, and the difference between the first length l 1 of the upper opening and the first length of the lower opening is 0.5 mm.
- the cooling surface 6 includes two side planes and a curved surface in the middle; as shown in FIG6 , in another embodiment, the cooling surface 6 includes two side planes and a plane in the middle.
- the cooling surface 6 is provided with three rows of fastening holes 7 in its width direction, which are used to fix the narrow copper plate 100 to the stainless steel back plate of the crystallizer.
- the first cooling water trough 8 and the second cooling water trough 9 of the same width and perpendicular to the plane where the two first connecting lines L 1 are located are evenly distributed between any two rows of fastening holes 7.
- An inclined water trough 10 is provided on both side edges of the cooling surface 6, and the inclined water trough 10 is inclined toward the middle of the second working surface.
- the angle between the axis of the inclined water trough 10 and the upper side working surface 2 is ⁇ 1 , and ⁇ 1 is 75°, as shown in FIG5 .
- the first cooling water trough 8, the second cooling water trough 9 and the inclined water trough 10 all have a trough bottom 11, and the trough bottom 11 is a semicircular structure.
- the cross section of the first working surface 1 located in the plane where the upper mouth side working surface 2 and the lower mouth side working surface 3 are connected is the reference convex arc L3
- the convex arc of the cross section of the bottom of the multiple second cooling water troughs 9 located on the same arc surface is L4
- the convex arc L4 of the cross section of the arc surface where the bottom 11 of the multiple second cooling water troughs 9 is located is parallel to the reference convex arc L3 .
- the convex arc L4 of the cross section of the arc surface where the bottom 11 of the multiple second cooling water troughs 9 is located is obtained by translating the reference convex arc L3 vertically to the cooling surface 6 by 20mm.
- the vertical distance between the bottom of the second cooling water trough 9 and the bottom of the adjacent first cooling water trough 8 is a ninth length l 9 .
- the ninth length l 9 is 1.5 mm, as shown in FIG. 6 , thereby ensuring uniform heat transfer of the crystallizer copper plate in the width direction.
- This embodiment also introduces a crystallizer, which uses the narrow copper plate 100 of the convex curved continuous casting crystallizer as described above.
- the distance between the upper openings 4 of the narrow copper plates of the two narrow copper plates 100 is greater than the distance between the lower openings 5 of the narrow copper plates of the two narrow copper plates 100, so that the crystallizer forms a structure with a wide upper part and a narrow lower part, and has a certain inverted taper.
- the taper of the crystallizer is 1.05% to 1.35%.
- This embodiment also introduces a method for using a narrow copper plate 100 of a convex curved continuous casting crystallizer.
- cooling water is passed into the cooling water tank of the narrow copper plate 100.
- the amount of cooling water of the narrow copper plate 100 varies depending on the structure of the water tank.
- the flow rate of the cooling water in the cooling water tank of the narrow copper plate 100 is greater than or equal to At 6 m/s, the inlet and outlet temperature difference of the cooling water in the cooling water tank of the narrow copper plate 100 is 5 to 9°C.
- first and second are used for descriptive purposes only and should not be understood as indicating or implying relative importance.
- plurality refers to two or more than two, unless otherwise clearly defined.
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Abstract
一种凸型弧面连铸结晶器窄面铜板（100），包括第一工作面（1）和第二工作面；第二工作面设置有两个；第一工作面分别和所述第二工作面连接，第一工作面和第二工作面的连接处为第一连接线（L 1），第一连接线设有两条；第一工作面的横截面为凸型弧线，第一工作面从窄面铜板的上口延伸至窄面铜板的下口，第一工作面相对于两条第一连接线所在平面凸起的高度从窄面铜板的上口向窄面铜板的下口的方向逐渐减小。以上凸型弧面连铸结晶器窄面铜板的使用方法。第一工作面宽度足够宽，第一工作面的凸起变化量小，降低了连铸板坯轧制过程形成显著宽度边线裂纹缺陷和显著的双股形状缺陷的概率。
Description
本申请要求于2022年10月27日提交中国专利局、申请号为202211329292.4、申请名称为“一种凸型弧面连铸结晶器窄面铜板及其使用方法”的中国专利申请的优先权，其全部内容通过引用结合在申请中。
本申请涉及结晶器连铸领域，特别涉及一种凸型弧面连铸结晶器窄面铜板及其使用方法。
连铸板坯是制备高性能中厚板与宽厚板等板材的主要铸坯母材。在实际板坯连铸生产中，高温钢液在由两块背面带有冷却水槽结构的水冷宽面铜板与两块背面带有冷却水槽结构的水冷窄面铜板构成的结晶器内凝固，从而形成具有一定形状、表面质量优良的凝固坯壳，而后随着拉坯下行，在二冷铸流内逐渐完全凝固形成质量、形状及尺寸均合格的铸坯。
连铸板坯窄面形状是影响板材轧制过程中间坯边部形貌演变的重要因素。在实际中/宽厚板轧制过程，平面形或近平面形板坯窄面逐渐发生了平面形→双股形→单股形的转变。在该过程中，中间坯的窄面逐渐上下翻至钢板的边部。受限于当前中/宽厚板轧制过程中间坯边部难以高温控制，中间坯窄面轧制过程极易形成“拉丝”形貌缺陷，并由此引发形成细直线状裂纹缺陷，而后伴随中间坯窄面上下翻转至钢板边部而形成了钢板边线裂纹缺陷。若连铸过程所生产的板坯窄面形成鼓肚，将进一步加剧中间坯窄面翻至钢板边部表面的宽度，进一步恶化钢板边部质量。严格控制连铸板坯窄面鼓肚，特别是将连铸板坯窄面制备呈大弧面内凹状结构，是减少宽厚板轧制过程形成显著宽度边线裂纹缺陷的关键。
专利号为201520673254.X的实用新型专利和专利号为201610796688.8的发明专利均公布了一种利用窄面工作面横向中部具有凸块结构的结晶器铜板制备窄面凹形结构板坯的方法。由该二专利所设计的结晶器窄面铜板，其工作面的横向中部为半径150～300mm、凸起高度为5～12mm圆弧面，且凸形圆弧面通
过与其相切的过渡面过渡至铜板边部两侧的基础面。采用该结构结晶器窄面铜板，可以制备出直角结构的窄面凹形坯，从而在一定程度上能够减少宽厚板轧制过程形成显著宽度边线裂纹缺陷。然而，该窄面铜板为了实现横向中部凸形圆弧面与其两侧边部基础面之间平滑过渡，需设计宽过渡区，使得留给结晶器窄面铜板横向中部区域圆弧凸面的宽度就十分窄，从而致使窄面铜板横向中部的弧面凸形量变得十分集中，即凸起结构变化过快，由此将导致采用该结晶器所生产的铸坯窄面内凹变化过快，易使铸坯窄面形成近“三角形”的内凹结构坯型。对于宽厚板轧制而言，该形铸坯轧制过程的中间坯边部极易形成显著的双股形状缺陷。特别是在大展宽比时，易造成钢板边部大尺寸折叠缺陷。
因此，需要设计新型窄面铜板，新型的窄面铜板的横向中部区域圆弧凸面的宽度需要足够宽，以避免弧面凸起变化量大使铸坯窄面形成近“三角形”的内凹结构。
申请内容
鉴于此，本申请提供一种凸型弧面连铸结晶器窄面铜板及其使用方法。
具体而言，包括以下的技术方案：
一方面提供了一种凸型弧面连铸结晶器窄面铜板，所述窄面铜板包括工作面，所述工作面包括：
第一工作面和第二工作面；
所述第二工作面设置有两个，一个所述第二工作面设置在所述第一工作面一侧，另一个所述第二工作面设置在所述第一工作面的另一侧，两个所述第二工作面相对设置；
所述第一工作面分别和两个所述第二工作面连接，所述第一工作面和所述第二工作面的连接处为第一连接线，所述第一连接线设有两条；
所述第一工作面的横截面为凸型弧线，所述第一工作面从所述窄面铜板的上口延伸至所述窄面铜板的下口，所述第一工作面相对于两条所述第一连接线所在平面凸起的高度从所述窄面铜板的上口向所述窄面铜板的下口的方向逐渐减小。
可选的，所述窄面铜板的上口所在平面和所述窄面铜板的下口所在平面平
行；
所述窄面铜板的上口所在平面内所述第一工作面和两条所述第一连接线所在平面之间的最大垂直距离为上口第一长度；
所述窄面铜板的下口所在平面内所述第一工作面和两条所述第一连接线所在平面之间的最大垂直距离为下口第一长度；
所述窄面铜板的上口所在平面和所述窄面铜板的下口所在平面之间的垂直距离为780～1200mm，所述上口第一长度和所述下口第一长度之间的差值为0.2～4mm。
可选的，所述窄面铜板的上口的宽度大于所述窄面铜板的下口的宽度。
可选的，所述第二工作面从所述窄面铜板的上口延伸至所述窄面铜板的下口，所述第二工作面的外边线与所述第一连接线之间到的距离从所述窄面铜板的上口至所述窄面铜板的下口保持不变。
可选的，所述第二工作面包括上口侧工作面和下口侧工作面；
所述上口侧工作面和所述下口侧工作面相连，所述上口侧工作面和所述下口侧工作面沿所述窄面铜板的上口至所述窄面铜板的下口的方向依次布置；
所述上口侧工作面为平直面，所述下口侧工作面为倾斜面，所述下口侧工作面向与所述第一工作面的凸起方向相反的方向倾斜。
可选的，所述窄面铜板包括冷却面，所述冷却面包括侧部平面，所述侧部平面与所述第二工作面相对设置，且所述侧部平面和所述上口侧工作面平行设置；
所述下口侧工作面包括第一顶点，所述第一顶点位于所述下口侧工作面和所述窄面铜板的下口连接线上，且所述第一顶点远离所述第一连接线设置；
所述第一顶点和所述侧部平面之间的垂直距离为所述下口侧工作面和所述侧部平面之间的最短垂直距离。
可选的，所述上口侧工作面从所述窄面铜板的上口延伸至所述下口侧工作面的距离为第二长度；
所述第二长度占所述窄面铜板的上口所在平面和所述窄面铜板的下口所在
平面之间的垂直距离的25％～75％。
可选的，所述窄面铜板包括紧固孔、第一冷却水槽和第二冷却水槽；
所述紧固孔设有多列，多列所述紧固孔沿所述窄面铜板的竖直中轴面对称布置；
相邻两列所述紧固孔之间设置所述第一冷却水槽和所述第二冷却水槽，所述第一冷却水槽设置有两个，所述第二冷却水槽设置有多个，两个所述第一冷却水槽分别和两列所述紧固孔相邻设置，多个所述第二冷却水槽位于两个所述第一冷却水槽之间；
所述第一冷却水槽的槽底较其相邻的所述第二冷却水槽的槽底更靠近所述第一工作面；多个所述第二冷却水槽的槽底位于同一圆弧面上。
可选的，位于所述上口侧工作面与所述下口侧工作面相接处所在平面内的所述第一工作面的横截面为参考凸型弧线；
多个所述第二冷却水槽的槽底所在圆弧面的横截面的凸型弧线和所述参考凸型弧线平行设置。
另一方面提供了一种凸型弧面连铸结晶器窄面铜板的使用方法，采用如上所述的一种凸型弧面连铸结晶器窄面铜板组成结晶器；
所述结晶器工作过程中向所述窄面铜板的冷却水槽内通冷却水，所述窄面铜板的冷却水槽内的冷却水的流速大于或等于6m/s，所述窄面铜板的冷却水槽内的所述冷却水的进出口温差为5～9℃。
本申请提供的技术方案的有益效果至少包括：
本申请第一工作面设置为凸起弧面，第一工作面和第二工作面之间的直接连接，使得第一工作面宽度足够宽，第一工作面的凸起变化量小，避免了第一工作面凸起变化量大使铸坯窄面形成近“三角形”的内凹结构，降低了连铸板坯轧制过程形成显著宽度边线裂纹缺陷和显著的双股形状缺陷的概率。
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所
需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请一个实施例的窄面铜板在结晶器中的安装结构示意图；
图2为本申请一个实施例的窄面铜板结构示意图；
图3为本申请一个实施例的窄面铜板下口侧工作面侧面结构示意图；
图4为本申请一个实施例的窄面铜板冷却面结构示意图；
图5为本申请一个实施例的上口侧工作面和下口侧工作面相接处窄面铜板的横截面结构示意图；
图6为本申请另一个实施例的上口侧工作面和下口侧工作面相接处窄面铜板的横截面结构示意图。
图中的附图标记分别表示为：
100-窄面铜板；200-宽面铜板；300-板坯；
1-第一工作面；2-上口侧工作面；3-下口侧工作面；4-窄面铜板的上口；5-窄面铜板的下口；6-冷却面；7-紧固孔；8-第一冷却水槽；9-第二冷却水槽；10-斜水槽；11-槽底；L1-第一连接线；L2-下口侧工作面的外边线；L3-参考凸型弧线；L4-多个第二冷却水槽的槽底所在圆弧面的横截面的凸型弧线；l1-上口第一长度；l2-第二长度；l3-第三长度；l4-第四长度；l5-第五长度；l6-第六长度；l7-第七长度；l8-第八长度；l9-第九长度；O1-第一端点；O2-第一顶点；θ1-斜水槽的轴线与上口侧工作面之间的夹角。
通过上述附图，已示出本申请明确的一个实施例，后文中将有更详细的描述。这些附图和文字描述并不是为了通过任何方式限制本申请构思的范围，而是通过参考特定实施例为本领域技术人员说明本申请的概念。
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部
的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在对本申请实施方式作进一步地详细描述之前，本申请实施例中所涉及的方位名词，如“上”、“下”、“侧”，并不具有限定本申请保护范围的意义。
为使本申请的技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
实施例一
本实施例介绍了一种凸型弧面连铸结晶器窄面铜板，窄面铜板100包括工作面，工作面包括：第一工作面1和第二工作面；第二工作面设置有两个，一个第二工作面设置在第一工作面1一侧，另一个第二工作面设置在第一工作面1的另一侧，两个第二工作面相对设置；第一工作面1分别和两个第二工作面连接，第一工作面1和第二工作面的连接处为第一连接线L1，第一连接线L1设有两条；第一工作面1的横截面为凸型弧线，第一工作面1从窄面铜板的上口4延伸至窄面铜板的下口5，第一工作面1相对于两条第一连接线L1所在平面凸起的高度从窄面铜板的上口4向窄面铜板的下口5的方向逐渐减小。
如图1所示，结晶器包括两块宽面铜板200和两块窄面铜板100，本实施例中窄面铜板100所在结晶器用于连铸生产厚度为175～650mm的直角结构窄面凹形板坯300。如图2所示，窄面铜板的上口4位于窄面铜板100的上端，窄面铜板的下口5位于窄面铜板100的下端，工作面为凝固坯壳相接触侧，第一工作面1为凸型弧面，向结晶器内腔方向凸起，可以理解的是，第一工作面1相对于两条第一连接线L1所在平面凸起的高度指的是第一工作面1向结晶器内腔方向延伸的距离。两个第二工作面位于第一工作面1的两侧，两个第二工作面沿第一工作面1的竖直中轴面对称设置，可以理解的是，两块窄面铜板100的竖直中轴面共面。第一工作面1和第二工作面的连接处形成第一连接线L1，两个第二工作面和第一工作面1形成两条第一连接线L1，第一工作面1相对两条第一连接线L1的所在平面凸起的高度从窄面铜板的上口4至窄面铜板的下口5逐渐减小。
本实施例中第一工作面1和两个第二工作面之间没有设置过渡面，第一工作面1和第二工作面之间的直接连接，使得第一工作面1的宽度足够宽，第一工作面1的凸起变化量小，使得板坯300具有宽大圆弧凹形结构，避免了第一工作面1凸起变化量大使铸坯窄面形成近“三角形”的内凹结构，降低了连铸板坯轧制过程形成显著宽度边线裂纹缺陷和显著的双股形状缺陷的概率。
同时，由于第二工作面的设置，使得板坯300具有直角结构，保证了铸坯300在二冷铸流内的角部温度不会过低，使得板坯300连铸过程中的角部横裂纹可控。再者，由于第一工作面1相对两条第一连接线L1的所在平面凸起的高度从窄面铜板的上口4至窄面铜板的下口5逐渐减小，使得应用此窄面铜板100的结晶器可以采用更大的锥度进行连铸生产，使凝固形成的板坯300的角部组织晶粒更细化，从而减少板坯300角部横裂纹产生，也使得窄面铜板的下口5附近区域的第一工作面1的磨损显著降低，延长了窄面铜板100的使用寿命。
可选的，窄面铜板的上口4所在平面和窄面铜板的下口5所在平面平行；窄面铜板的上口4所在平面内第一工作面1和两条第一连接线L1所在平面之间的最大垂直距离为上口第一长度l1；窄面铜板的下口5所在平面内第一工作面1和两条第一连接线L1所在平面之间的最大垂直距离为下口第一长度；窄面铜板的上口4所在平面和窄面铜板的下口5所在平面之间的垂直距离为780～1200mm，上口第一长度l1和下口第一长度之间的差值为0.2～4mm。
进一步，从窄面铜板的上口4至窄面铜板的下口5为窄面铜板100的高度方向，各高度处第一工作面1的最高点均位于窄面铜板100的竖直中轴面上。本实施例中上口第一长度l1为8～40mm，其他各高度下第一工作面1和两条第一连接线L1所在平面之间的最大垂直距离由窄面铜板的上口4至窄面铜板的下口5线性减小，直至减小到下口第一长度。
进一步，如图2所示，窄面铜板的上口4的宽度为第五长度l5，同时第五长度l5指示出了窄面铜板100的宽度方向，窄面铜板的下口5的宽度为第六长度l6。本实施例中第五长度l5比第六长度l6长1～4mm，且沿从窄面铜板的上口4向窄面铜板的下口5的方向，第五长度l5线性减小至第六长度l6。
可选的，如图2所示，本实施例中第二工作面从窄面铜板的上口4延伸至窄面铜板的下口5，第二工作面的外边线与第一连接线L1之间到的距离为第四长度l4，第四长度l4从窄面铜板的上口4至窄面铜板的下口5保持不变。根据所连铸生产的板坯300厚度，第四长度l4为10～50mm，如图1所示，板坯300的厚度指两块宽面铜板200之间的距离所指示的方向。
可选的，如图2所示，第二工作面包括上口侧工作面2和下口侧工作面3，上口侧工作面2和下口侧工作面3相连，上口侧工作面2和下口侧工作面3沿窄面铜板的上口4至窄面铜板的下口5的方向依次布置；上口侧工作面2为平直面，下口侧工作面3为倾斜面，下口侧工作面3向与第一工作面1的凸起方向相反的方向倾斜。进一步，下口侧工作面3有四条边，包括下口侧工作面的外边线L2、第一连接线L1、下口侧工作面的下边线和下口侧工作面的上边线，下口侧工作面的下边线为下口侧工作面3和窄面铜板的下口5的相交线，下口侧工作面的上边线为下口侧工作面3和上口侧工作面2的相交线。下口侧工作面3从第一连接线L1向下口侧工作面的外边线L2的方向逐渐向远离上口侧工作面2的延伸面的方向倾斜，同时，下口侧工作面3从下口侧工作面的上边线向下口侧工作面的下边线的方向逐渐向远离上口侧工作面2的延伸面的方向倾斜。
进一步，如图2和图3所示，窄面铜板100包括冷却面6，冷却面6和工作面相对设置，冷却面6上设有冷却水槽，用于对连铸板坯300进行冷却；冷却面6包括侧部平面，侧部平面与第二工作面相对设置，且侧部平面和上口侧工作面2平行设置；下口侧工作面3包括第一顶点O2，第一顶点O2位于下口侧工作面3和窄面铜板的下口5连接线上，且第一顶点O2远离第一连接线L1设置；第一顶点O2和侧部平面之间的垂直距离为下口侧工作面3和侧部平面之间的最短垂直距离。可以理解的是，第一顶点O2为下口侧工作面的下边线和下口侧工作面的外边线L2的交点，第一顶点O2和侧部平面之间的垂直距离为第七长度l7，上口侧工作面2和侧部平面之间的垂直距离为第三长度l3，第三长度l3与第七长度l7之间的长度差为第八长度l8，本实施例中，第三长度l3为
35～45mm，第八长度l8为0.25～4mm。进一步，一般第八长度l8的值应大于或等于上口第一长度l1和下口第一长度之间的差值。
进一步，如图5所示，在一种实施例中冷却面6包括两个侧部平面和中部的弧形面；如图6所示，在另一种实施例中冷却面6包括两个侧部平面和中部的平面。
进一步，可以理解的是，本实施例中，上口侧工作面2有四条边，包括上口侧工作面的外边线、第一连接线L1、上口侧工作面的下边线和上口侧工作面的上边线，上口侧工作面的下边线为下口侧工作面3和上口侧工作面2的相交线，上口侧工作面的上边线为上口侧工作面2和窄面铜板的上口4的相交线，上口侧工作面的外边线为与第一连接线L1平行相对设置的边线，上口侧工作面的外边线和下口侧工作面的外边线L2在第一端点O1处相接。
进一步，可以理解的是，第二工作面包括上口侧工作面2和下口侧工作面3，下口侧工作面3包括下口侧工作面的外边线L2，上口侧工作面2包括上口侧工作面的外边线，上口侧工作面的外边线和下口侧工作面的外边线L2相接后组成第二工作面的外边线。第二工作面的外边线与第一连接线L1之间到的距离为第四长度l4，第四长度l4从窄面铜板的上口4至窄面铜板的下口5保持不变。可以理解的是，两条第一连接线L1之间沿窄面铜板100宽度方向的距离从窄面铜板的上口4至窄面铜板的下口5线性递减，窄面铜板的上口4的平面内两条第一连接线L1之间沿窄面铜板100宽度方向的距离，比窄面铜板的下口5的平面内两条第一连接线L1之间沿窄面铜板100宽度方向的距离长1～4mm。倾斜设置的下口侧工作面3使得结晶器的下口对板坯300的凝固收缩补偿量减小，制备板坯300时进一步降低了板坯300对窄面铜板的下口5的磨损，提高了窄面板坯300的使用寿命。
可选的，上口侧工作面2从窄面铜板的上口4延伸至下口侧工作面3的距离为第二长度l2；第二长度l2占窄面铜板的上口4所在平面和窄面铜板的下口5所在平面之间的垂直距离的25％～75％。本实施例中，窄面铜板的上口4所在平面和窄面铜板的下口5所在平面之间的垂直距离为780～1200mm，根据结晶
器的高度和连铸拉速而定，第二长度l2一般为250～600mm。
可选的，如图4、图5和图6所示，窄面铜板100包括紧固孔7、第一冷却水槽8和第二冷却水槽9；紧固孔7设有多列，多列紧固孔7沿窄面铜板100的竖直中轴面对称布置；相邻两列紧固孔7之间设置第一冷却水槽8和第二冷却水槽9，第一冷却水槽8设置有两个，第二冷却水槽9设置有多个，第一冷却水槽8和第二冷却水槽9均沿窄面铜板100的高度方向延伸。两个第一冷却水槽8分别和两列紧固孔7相邻设置，多个第二冷却水槽9位于两个第一冷却水槽8之间；第一冷却水槽8的槽底较其相邻的第二冷却水槽9的槽底更靠近第一工作面1；多个第二冷却水槽9的槽底位于同一圆弧面上。
进一步，如图4所示，冷却面6上设有紧固孔7、第一冷却水槽8、第二冷却水槽9和斜水槽10，紧固孔7为螺栓孔。本实施例中宽度方向为第五长度l5的长度延伸方向，一般根据所生产的连铸坯厚度，冷却面6在其宽度方向上布有两列至四列的紧固孔7，用于固定窄面铜板100至结晶器不锈钢背板上。第一冷却水槽8、第二冷却水槽9和斜水槽10沿窄面铜板100的宽度方向均布，且第一冷却水槽8、第二冷却水槽9和斜水槽10的槽宽相同。如图5和图6所示，第一冷却水槽8和第二冷却水槽9向两条第一连接线L1的所在平面的方向垂直凹陷，斜水槽10向第二工作面的中部方向倾斜凹陷。本实施例中斜水槽10向第二工作面的中部倾斜时，斜水槽10的轴线与上口侧工作面2之间的夹角为θ1，θ1一般为65～80°。
进一步，如图4所示，相邻两列紧固孔7之间设置两个第一冷却水槽8和多个第二冷却水槽9，可以理解的是，此处的两个第一冷却水槽8和多个第二冷却水槽9指的是相邻两列紧固孔7之间的第一冷却水槽8和第二冷却水槽9，因此，整个冷却面6上设有多个第一冷却水槽8、多个第二冷却水槽9和两个斜水槽10，而多个第一冷却水槽8、多个第二冷却水槽9和两个斜水槽10沿窄面铜板100的竖直中轴面对称设置。
进一步，如图5和图6所示，第一冷却水槽8、第二冷却水槽9和斜水槽10均具有槽底11，槽底11为半圆形结构。
可选的，如图5和图6所示，位于上口侧工作面2与下口侧工作面3相接处所在平面内的第一工作面1的横截面为参考凸型弧线L3；多个第二冷却水槽9的槽底11所在圆弧面的横截面的凸型弧线L4和参考凸型弧线L3平行设置。
进一步，上口侧工作面2与下口侧工作面3相接处所在平面为第一端点O1所在高度处的窄面铜板100的横截面。多个第二冷却水槽9的槽底11所在圆弧面的横截面的凸型弧线L4为参考凸型弧线L3垂直向冷却面6方向平移20～30mm所得。
进一步，第二冷却水槽9的槽底和与其相邻的第一冷却水槽8的槽底之间的垂直距离为第九长度l9，本实施例中，第九长度l9为1～3mm。
本实施例中第一冷却水槽8、第二冷却水槽9和斜水槽10的结构和布置方式保证了结晶器窄面铜板100在宽度方向上均匀传热。
本实施例还介绍了一种结晶器，采用如上所述的凸型弧面连铸结晶器窄面铜板100，两块窄面铜板100布置时，两块窄面铜板100的窄面铜板的上口4之间的距离，大于两块窄面铜板100的窄面铜板的下口5之间的距离，以使结晶器形成上宽、下窄的结构，具有一定倒锥度，结晶器的锥度为1.05％～1.35％。
本实施例还介绍了一种凸型弧面连铸结晶器窄面铜板100的使用方法，结晶器工作过程中向窄面铜板100的冷却水槽内通冷却水，窄面铜板100的冷却水量根据水槽结构不同，窄面铜板100的冷却水槽内的冷却水的流速大于或等于6m/s，窄面铜板100的冷却水槽内的冷却水的进出口温差为5～9℃。
可以理解的是，窄面铜板100的冷却水槽指第一冷却水槽8、第二冷却水槽9和斜水槽10，冷却水量根据水槽结构不同，窄面铜板100的冷却水槽内的冷却水的流速大于或等于6m/s，冷却水槽内的冷却水的进出口温差为5～9℃。
通过应用本实施例的窄面铜板100，第一工作面1和第二工作面的设置可制备出直角结构的窄面凹形板坯300，保证铸坯轧制中/宽厚板过程边线裂纹宽度控制在距边部20mm范围内，同时亦可确保板坯300在二冷铸流内凝固过程的角部温度与传统直角连铸板坯300的角部温度相近，控制板坯300角部裂纹高发；采用本实施例中窄面铜板100制备的板坯300窄面横向中部为宽大圆弧
凹形结构，杜绝了已公布的剧烈过渡凹形坯轧制引发的窄面折叠缺陷；本实施例中由于窄面铜板的下口5处磨损降低，窄面铜板100使用寿命显著提高；采用本实施例的窄面铜板100连铸生产板坯300，可保证结晶器窄面使用大锥度工艺连铸生产。
实施例二
一种连铸生产厚度为300mm的板坯300的凸形弧面结晶器窄面铜板100，其高度为900mm，窄面铜板的上口4的宽度第五长度l5为316mm、窄面铜板的下口5的宽度第六长度l6为314mm，第五长度l5与第六长度l6的长度差为2mm，从窄面铜板的上口4至窄面铜板的下口5窄面铜板100的宽度由第五长度l5逐渐线性减小至第六长度l6，如图2所示。
窄面铜板100包括与凝固坯壳相接触侧的工作面和与工作面相对的带有冷却水槽的冷却面6。窄面铜板100的工作面，在宽度方向上将其分为两侧的第二工作面和中部的第一工作面1。两侧的第二工作面和中部的第一工作面1的连接线为第一连接线L1。其中，第二工作面在窄面铜板100的高度方向上，分为上口侧工作面2与下口侧工作面3，如图2所示。两侧的上口侧工作面2与下口侧工作面3均以窄面铜板100的竖直中轴面为对称线对称分布。
如图2所示，上口侧工作面2有四条边，包括上口侧工作面的外边线、第一连接线L1、上口侧工作面的下边线和上口侧工作面的上边线，上口侧工作面的下边线为下口侧工作面3和上口侧工作面2的相交线，上口侧工作面的上边线为上口侧工作面2和窄面铜板的上口4的相交线，上口侧工作面的外边线为与第一连接线L1平行相对设置的边线。上口侧工作面的外边线和第一连接线L1之间的距离为第四长度l4，第四长度l4为30mm。
下口侧工作面3有四条边，包括下口侧工作面的外边线L2、第一连接线L1、下口侧工作面的下边线和下口侧工作面的上边线，下口侧工作面的下边线为下口侧工作面3和窄面铜板的下口5的相交线，下口侧工作面的上边线为下口侧工作面3和上口侧工作面2的相交线。下口侧工作面的外边线L2和第一连接线L1之间的距离为第四长度l4，第四长度l4为30mm。
下口侧工作面的外边线L2和上口侧工作面的外边线在第一端点O1处相接。
如图2所示，上口侧工作面2为平面结构，上口侧工作面2和冷却面6的侧部平面之间的距离为第三长度l3，为40mm。在窄面铜板100的高度方向上，上口侧工作面2的高度为从窄面铜板的上口4延伸至下口侧工作面3的距离第二长度l2，为450mm。
如图2和图3所示，窄面铜板100包括冷却面6，冷却面6和工作面相对设置，冷却面6上设有冷却水槽，用于对连铸板坯300进行冷却；冷却面6包括侧部平面，侧部平面与第二工作面相对设置，且侧部平面和上口侧工作面2平行设置；下口侧工作面3包括第一顶点O2，第一顶点O2位于下口侧工作面3和窄面铜板的下口5连接线上，且第一顶点O2远离第一连接线L1设置；第一顶点O2和侧部平面之间的垂直距离为下口侧工作面3和侧部平面之间的最短垂直距离。可以理解的是，第一顶点O2为下口侧工作面的下边线和下口侧工作面的外边线L2的交点，第一顶点O2和侧部平面之间的垂直距离为第七长度l7，上口侧工作面2和侧部平面之间的垂直距离为第三长度l3，第三长度l3与第七长度l7之间的长度差为第八长度l8，本实施例中，第三长度l3为40mm，第八长度l8为0.5mm。
下口侧工作面3从第一连接线L1向下口侧工作面的外边线L2的方向逐渐向远离上口侧工作面2的延伸面的方向倾斜，同时，下口侧工作面3从下口侧工作面的上边线向下口侧工作面的下边线的方向逐渐向远离上口侧工作面2的延伸面的方向倾斜。
第一工作面1为凸型弧面，向结晶器内腔方向凸起，两个第二工作面位于第一工作面1的两侧，两个第二工作面沿第一工作面1的竖直中轴面对称设置，可以理解的是，两块窄面铜板100的竖直中轴面共面。第一工作面1和第二工作面的连接处形成第一连接线L1，两个第二工作面和第一工作面1形成两条第一连接线L1，第一工作面1相对两条第一连接线L1的所在平面凸起的高度从窄面铜板的上口4至窄面铜板的下口5逐渐减小。窄面铜板的上口4所在平面内第一工作面1和两条第一连接线L1所在平面之间的最大垂直距离为上口第一长
度l1，上口第一长度l1为12mm，上口第一长度l1和下口第一长度之间的差值为0.5mm。
如图5所示，在一种实施例中冷却面6包括两个侧部平面和中部的弧形面；如图6所示，在另一种实施例中冷却面6包括两个侧部平面和中部的平面。本实施例以图6所示的平面结构的冷却面6做重点实施说明。冷却面6在其宽度方向上布有三列紧固孔7，用于固定窄面铜板100至结晶器不锈钢背板上。在窄面铜板100宽度方向上，任意两列紧固孔7之间均布宽度相同且垂直于两条第一连接线L1所在平面的第一冷却水槽8和第二冷却水槽9。在冷却面6的两侧边部分别设有斜水槽10，斜水槽10向第二工作面的中部倾斜，斜水槽10的轴线与上口侧工作面2之间的夹角为θ1，θ1为75°，如图5所示。
第一冷却水槽8、第二冷却水槽9和斜水槽10均具有槽底11，槽底11为半圆形结构。其中，位于上口侧工作面2与下口侧工作面3相接处所在平面内的第一工作面1的横截面为参考凸型弧线L3，多个第二冷却水槽9的槽底位于同一圆弧面的横截面的凸型弧线为L4，多个第二冷却水槽9的槽底11所在圆弧面的横截面的凸型弧线L4和参考凸型弧线L3平行设置。多个第二冷却水槽9的槽底11所在圆弧面的横截面的凸型弧线L4为参考凸型弧线L3垂直向冷却面6方向平移20mm所得。
第二冷却水槽9的槽底和与其相邻的第一冷却水槽8的槽底之间的垂直距离为第九长度l9，本实施例中，第九长度l9为1.5mm，如图6所示，从而保证了该结晶器铜板在宽度方向上均匀传热。
本实施例还介绍了一种结晶器，采用如上所述的凸型弧面连铸结晶器窄面铜板100，两块窄面铜板100布置时，两块窄面铜板100的窄面铜板的上口4之间的距离，大于两块窄面铜板100的窄面铜板的下口5之间的距离，以使结晶器形成上宽、下窄的结构，具有一定倒锥度，结晶器的锥度为1.05％～1.35％。。
本实施例还介绍了一种凸形弧面连铸结晶器窄面铜板100的使用方法，结晶器工作过程中向窄面铜板100的冷却水槽内通冷却水，窄面铜板100的冷却水量根据水槽结构不同，窄面铜板100的冷却水槽内的冷却水的流速大于或等
于6m/s，窄面铜板100的冷却水槽内的冷却水的进出口温差为5～9℃。
在本申请中，术语“第一”和“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。术语“多个”指两个或两个以上，除非另有明确的限定。
本领域技术人员在考虑说明书及实践这里公开的本申请后，将容易想到本申请的其它实施方案。本申请旨在涵盖本申请的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本申请的一般性原理并包括本申请未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的。
以上仅为本申请的较佳实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。
Claims (10)
- 一种凸型弧面连铸结晶器窄面铜板，所述窄面铜板包括工作面，其中，所述工作面包括：第一工作面和第二工作面；所述第二工作面设置有两个，一个所述第二工作面设置在所述第一工作面一侧，另一个所述第二工作面设置在所述第一工作面的另一侧，两个所述第二工作面相对设置；所述第一工作面分别和两个所述第二工作面连接，所述第一工作面和所述第二工作面的连接处为第一连接线，所述第一连接线设有两条；所述第一工作面的横截面为凸型弧线，所述第一工作面从所述窄面铜板的上口延伸至所述窄面铜板的下口，所述第一工作面相对于两条所述第一连接线所在平面凸起的高度从所述窄面铜板的上口向所述窄面铜板的下口的方向逐渐减小。
- 根据权利要求1所述的一种凸型弧面连铸结晶器窄面铜板，其中，所述窄面铜板的上口所在平面和所述窄面铜板的下口所在平面平行；所述窄面铜板的上口所在平面内所述第一工作面和两条所述第一连接线所在平面之间的最大垂直距离为上口第一长度；所述窄面铜板的下口所在平面内所述第一工作面和两条所述第一连接线所在平面之间的最大垂直距离为下口第一长度；所述窄面铜板的上口所在平面和所述窄面铜板的下口所在平面之间的垂直距离为780～1200mm，所述上口第一长度和所述下口第一长度之间的差值为0.2～4mm。
- 根据权利要求2所述的一种凸型弧面连铸结晶器窄面铜板，其中，所述窄面铜板的上口的宽度大于所述窄面铜板的下口的宽度。
- 根据权利要求1所述的一种凸型弧面连铸结晶器窄面铜板，其中，所述第二工作面从所述窄面铜板的上口延伸至所述窄面铜板的下口，所述第二工作面的外边线与所述第一连接线之间到的距离从所述窄面铜板的上口至 所述窄面铜板的下口保持不变。
- 根据权利要求1所述的一种凸型弧面连铸结晶器窄面铜板，其中，所述第二工作面包括上口侧工作面和下口侧工作面；所述上口侧工作面和所述下口侧工作面相连，所述上口侧工作面和所述下口侧工作面沿所述窄面铜板的上口至所述窄面铜板的下口的方向依次布置；所述上口侧工作面为平直面，所述下口侧工作面为倾斜面，所述下口侧工作面向与所述第一工作面的凸起方向相反的方向倾斜。
- 根据权利要求5所述的一种凸型弧面连铸结晶器窄面铜板，其中，所述窄面铜板包括冷却面，所述冷却面包括侧部平面，所述侧部平面与所述第二工作面相对设置，且所述侧部平面和所述上口侧工作面平行设置；所述下口侧工作面包括第一顶点，所述第一顶点位于所述下口侧工作面和所述窄面铜板的下口连接线上，且所述第一顶点远离所述第一连接线设置；所述第一顶点和所述侧部平面之间的垂直距离为所述下口侧工作面和所述侧部平面之间的最短垂直距离。
- 根据权利要求5所述的一种凸型弧面连铸结晶器窄面铜板，其中，所述上口侧工作面从所述窄面铜板的上口延伸至所述下口侧工作面的距离为第二长度；所述第二长度占所述窄面铜板的上口所在平面和所述窄面铜板的下口所在平面之间的垂直距离的25％～75％。
- 根据权利要求1所述的一种凸型弧面连铸结晶器窄面铜板，其中，所述窄面铜板包括紧固孔、第一冷却水槽和第二冷却水槽；所述紧固孔设有多列，多列所述紧固孔沿所述窄面铜板的竖直中轴面对称布置；相邻两列所述紧固孔之间设置所述第一冷却水槽和所述第二冷却水槽，所述第一冷却水槽设置有两个，所述第二冷却水槽设置有多个，两个所述第一冷却水槽分别和两列所述紧固孔相邻设置，多个所述第二冷却水槽位于两个所述第一冷却水槽之间；所述第一冷却水槽的槽底较其相邻的所述第二冷却水槽的槽底更靠近所述第一工作面；多个所述第二冷却水槽的槽底位于同一圆弧面上。
- 根据权利要求8所述的一种凸型弧面连铸结晶器窄面铜板，其中，位于所述上口侧工作面与所述下口侧工作面相接处所在平面内的所述第一工作面的横截面为参考凸型弧线；多个所述第二冷却水槽的槽底所在圆弧面的横截面的凸型弧线和所述参考凸型弧线平行设置。
- 一种凸型弧面连铸结晶器窄面铜板的使用方法，其中，采用如权利要求1-9任一项所述的一种凸型弧面连铸结晶器窄面铜板组成结晶器；所述结晶器工作过程中向所述窄面铜板的冷却水槽内通冷却水，所述窄面铜板的冷却水槽内的冷却水的流速大于或等于6m/s，所述窄面铜板的冷却水槽内的所述冷却水的进出口温差为5～9℃。
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