CN109894585B - Continuous casting tube type crystallizer - Google Patents
Continuous casting tube type crystallizer Download PDFInfo
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- CN109894585B CN109894585B CN201910355912.3A CN201910355912A CN109894585B CN 109894585 B CN109894585 B CN 109894585B CN 201910355912 A CN201910355912 A CN 201910355912A CN 109894585 B CN109894585 B CN 109894585B
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Abstract
The invention belongs to the field of metallurgical equipment, and particularly discloses a continuous casting tubular crystallizer capable of effectively reducing the middle deformation of an existing copper pipe. The continuous casting pipe type crystallizer comprises a copper pipe and a water jacket; the copper pipe is rectangular, and the adjacent side surfaces of the copper pipe are connected in a smooth transition mode through arc parts; the water jacket is sleeved on the copper pipe, and a water gap is formed between the water jacket and the copper pipe; the copper pipe is characterized by further comprising a copper bar arranged on the outer surface of the arc portion along the height direction of the copper pipe, and the outer surface of the copper bar is an arc-shaped surface and is matched and attached to the inner surface of the water jacket. Set up the copper bar on the arc portion surface of copper pipe through the direction of height along the copper pipe, can strengthen the structural strength of copper pipe on the one hand, on the other hand the copper bar can also be in close fit with the water jacket together, consequently can show the deflection that reduces the copper pipe middle part to improve the quality of the continuous casting billet of producing and the life of crystallizer.
Description
Technical Field
The invention belongs to the field of metallurgical equipment, and particularly relates to a continuous casting tubular crystallizer.
Background
The main body of the continuous casting tubular crystallizer is directly formed by a copper pipe, a water jacket is sleeved outside the copper pipe, and cooling water is in contact with the cold surface of the whole copper pipe. Compared with a combined crystallizer, the continuous casting tubular crystallizer is not provided with angle seams among copper plates, the arrangement of the water seams at the angle parts is more reasonable, the casting blank is cooled more uniformly, and the quality of the angle parts is better. However, the copper pipe of the continuous casting pipe type crystallizer is generally thin, the copper pipe and the water jacket are fixed only by flanges at the top and the bottom of the crystallizer, deformation of the top and the bottom is prevented, the middle part of the copper pipe and the water jacket cannot be connected and fixed by bolts like a combined crystallizer, and the middle part of the copper pipe is easily deformed greatly under the action of molten steel static pressure, cooling hydrostatic pressure and thermal stress because the continuous casting pipe type crystallizer is large in height and generally about 0.9m, and the area with the largest deformation of the copper pipe is 0.1m below the liquid level of the molten steel.
Researches show that with the increase of the cross section of the continuous casting tubular crystallizer, the deformation is increased by 0.4-1.4 mm, the heat transfer resistance is increased by 30-70%, the heat transfer and solidification behaviors of a casting blank are obviously influenced, local heat transfer unevenness is caused, cracks and other defects are formed, and particularly, the corner cracks of the casting blank are caused. In addition, after the deformation of the copper pipe is increased, the abrasion between the copper pipe and a casting blank is increased, and the service life of the copper pipe can be shortened.
Disclosure of Invention
The invention aims to solve the technical problem of providing a continuous casting tube type crystallizer which can effectively reduce the middle deformation of the existing copper tube.
The technical scheme adopted by the invention for solving the technical problems is as follows: the continuous casting pipe type crystallizer comprises a copper pipe and a water jacket; the copper pipe is rectangular, and the adjacent side surfaces of the copper pipe are connected in a smooth transition mode through arc parts; the water jacket is sleeved on the copper pipe, and a water gap is formed between the water jacket and the copper pipe; the copper pipe is characterized by further comprising a copper bar arranged on the outer surface of the arc portion along the height direction of the copper pipe, and the outer surface of the copper bar is an arc-shaped surface and is matched and attached to the inner surface of the water jacket.
Further, the arc length of the outer surface of the copper bar is 5-40 mm, and the distance between the outer surface of the copper bar and the outer surface of the copper pipe is 4-10 mm.
Further, the height of the copper pipe is H1The height of the copper bar is H2，100mm≤H2≤H1-20mm。
Further, the top of the copper bar is at least 10mm lower than the top of the copper tube, and the bottom of the copper bar is at least 10mm higher than the bottom of the copper tube.
Furthermore, the copper bar is welded on the copper pipe, and the side surface of the copper bar is connected with the outer surface of the copper pipe in a smooth transition mode through an arc chamfer.
Further, the radius of the arc chamfer is 2-5 mm.
Furthermore, at least two copper strips are arranged on the arc part, and the copper strips on each arc part are distributed at intervals along the height direction of the copper pipe.
Further, the distance between two adjacent copper bars on the arc part is 50-400 mm.
Further, the area where the copper strip is located is a middle reinforcing area of the copper pipe, the distance between the top of the middle reinforcing area and the top of the copper pipe is 80mm, and the distance between the bottom of the middle reinforcing area and the top of the copper pipe is 300 mm.
Furthermore, a top flange and a bottom flange are respectively arranged on the top and the bottom of the copper pipe and are respectively fixed with the top and the bottom of the water jacket through the top flange and the bottom flange.
The invention has the beneficial effects that: the copper strip is arranged on the outer surface of the arc part of the copper pipe in the height direction of the copper pipe, so that the structural strength of the copper pipe can be enhanced, and the copper strip can be tightly matched with the water jacket, so that the deformation of the middle part of the copper pipe of the produced tubular crystallizer can be obviously reduced, and the quality of the produced continuous casting billet and the service life of the crystallizer are improved. Compared with the prior continuous casting tubular crystallizer, the continuous casting tubular crystallizer has the advantages that the deformation of a copper pipe is reduced by 25-58 percent (the average is about 46 percent), the crack rate of the casting blank corner is reduced by 25-40 percent (the average is about 31 percent), and the service life is prolonged by 29-62 percent.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
labeled as: copper pipe 10, water jacket 20, water seam 30, copper bar 40.
Detailed Description
The invention will be further explained with reference to the drawings.
Referring to fig. 1 and 2, a continuous casting tube type crystallizer includes a copper tube 10 and a water jacket 20; the copper pipe 10 is rectangular, and the adjacent side surfaces of the copper pipe 10 are connected in a smooth transition mode through arc parts; the water jacket 20 is sleeved on the copper pipe 10, and a water gap 30 is formed between the water jacket 20 and the copper pipe 10; the copper pipe is characterized by further comprising a copper bar 40 arranged on the outer surface of the arc portion along the height direction of the copper pipe 10, wherein the outer surface of the copper bar 40 is an arc surface and is matched and attached with the inner surface of the water jacket 20.
The copper pipe 10 comprises four arc parts which are respectively positioned at four corners of the copper pipe; a top flange and a bottom flange are generally provided on the top and bottom of the copper pipe 10, respectively, and are fixed to the top and bottom of the water jacket 20 by the top flange and the bottom flange, respectively. The copper bar 40 is arranged on the outer surface of the arc part, can be connected with the arc part in an embedded mode and connected through a connecting piece, and is preferably welded with the arc part; because the outer surface of the copper bar 40 is an arc surface and is matched and attached with the inner surface of the water jacket 20, after the water jacket 20 is sleeved on the copper pipe 10, the copper pipe 10 can be tightly matched with the water jacket 20 through the copper bar 40; the copper bar 40 is typically made of the same material as the copper tube 10. In order to perfectly match the copper bar 40 and the water jacket 20, the arc length of the outer surface of the copper bar 40 is preferably 5-40 mm, and the distance between the outer surface of the copper bar 40 and the outer surface of the copper pipe 10 is preferably 4-10 mm.
Typically the copper tube 10 has a height H1The height of the copper bar 40 is H2(ii) a In order to minimize the deformation of the middle portion of the copper pipe 10 and ensure the cooling effect, it is preferable to set H to 100mm ≦ H2≤H1-20 mm. I.e., such that the minimum height of the copper bar 40 is not less than 100mm and the maximum height is 20mm less than the height of the copper tube 10. It is further preferred that the copper bar 40 is formed such that the top of the copper bar 40 is at least 10mm lower than the top of the copper tube 10 and the bottom of the copper bar 40 is at least 10mm higher than the bottom of the copper tube 10.
As shown in fig. 2, in order to ensure the structural strength of the joint between the copper bar 40 and the copper pipe 10 and to improve the water diversion effect, the copper bar 40 is usually welded to the copper pipe 10, and the side surface of the copper bar 40 is smoothly transitionally connected to the outer surface of the copper pipe 10 by an arc chamfer. Preferably, the radius of the arc chamfer is 2-5 mm.
In a preferred embodiment of the present invention, at least two copper bars 40 are disposed on the circular arc portion, and the copper bars 40 on each circular arc portion are spaced apart from each other in the height direction of the copper tube 10. By providing the plurality of copper bars 40 on the arc portion, the deformation amount of the copper pipe 10 can be further reduced, and the cooling effect of the cooling water is also improved.
In addition, the distance between two adjacent copper bars 40 on the arc part is preferably 50 to 400 mm.
Generally, the area where the copper bar 40 is located is divided into a middle reinforcing area on the copper tube 10, and in order to minimize the deformation of the middle portion of the copper tube 10, it is preferable that the distance between the top of the middle reinforcing area and the top of the copper tube 10 is 80mm, and the distance between the bottom of the middle reinforcing area and the top of the copper tube 10 is 300 mm.
Example 1
The continuous casting tubular crystallizer comprises a copper tube 10, a water jacket 20 and a copper bar 40; the cross section of the copper pipe 10 is a rectangle with the size of 320mm multiplied by 410mm, and the adjacent side surfaces of the copper pipe 10 are connected in a smooth transition mode through arc parts, so that four arc parts are formed; the water jacket 20 is sleeved on the copper pipe 10, and a water gap 30 is formed between the water jacket 20 and the copper pipe 10; the copper bar 40 is arranged on the outer surface of the arc part along the height direction of the copper pipe 10, and the outer surface of the copper bar 40 is an arc surface and is matched and attached with the inner surface of the water jacket 20; the number of the copper bars 40 is four, the copper bars are respectively positioned on the four arc parts, the arc length of the outer surface of each copper bar 40 is 30mm, the distance between the outer surface of each copper bar 40 and the outer surface of the copper pipe 10 is 8mm, and the height of each copper bar 40 is 800 mm; the top of the copper bar 40 is 50mm lower than the top of the copper pipe 10, and the bottom of the copper bar 40 is 50mm higher than the bottom of the copper pipe 10; the side of the copper bar 40 is connected with the outer surface of the copper pipe 10 in a smooth transition way through an arc chamfer with the radius of 4 mm.
The test under the same working condition shows that compared with the existing continuous casting tubular crystallizer, the temperature of cooling water in the continuous casting process is increased by 4-5 ℃, the corner defects of a casting blank are reduced by 40%, the deformation of a measured copper pipe 10 after the continuous casting is finished is reduced by 58%, and the service life of the crystallizer is increased by 62%.
Example 2
The continuous casting tubular crystallizer comprises a copper tube 10, a water jacket 20 and a copper bar 40; the cross section of the copper pipe 10 is a rectangle with the size of 150mm multiplied by 150mm, and the adjacent side surfaces of the copper pipe 10 are connected in a smooth transition mode through arc parts, so that four arc parts are formed; the water jacket 20 is sleeved on the copper pipe 10, and a water gap 30 is formed between the water jacket 20 and the copper pipe 10; the copper bar 40 is arranged on the outer surface of the arc part along the height direction of the copper pipe 10, and the outer surface of the copper bar 40 is an arc surface and is matched and attached with the inner surface of the water jacket 20; the number of the copper bars 40 is four, the copper bars are respectively positioned on the four arc parts, the arc length of the outer surface of each copper bar 40 is 10mm, the distance between the outer surface of each copper bar 40 and the outer surface of the copper pipe 10 is 5mm, and the height of each copper bar 40 is 700 mm; the top of the copper bar 40 is 100mm lower than the top of the copper pipe 10, and the bottom of the copper bar 40 is 100mm higher than the bottom of the copper pipe 10; the side of the copper bar 40 is connected with the outer surface of the copper pipe 10 through a circular arc chamfer in a smooth transition way, and the radius of the circular arc chamfer is 2 mm.
Compared with the conventional continuous casting tubular crystallizer, the temperature of cooling water in the continuous casting process is increased by 5-6 ℃, the corner defects of a casting blank are reduced by 25%, the deformation of a measured copper pipe 10 after the continuous casting tubular crystallizer is offline is reduced by 25%, and the service life of the crystallizer is increased by 29%.
Example 3
The continuous casting tubular crystallizer comprises a copper tube 10, a water jacket 20 and a copper bar 40; the cross section of the copper pipe 10 is a rectangle with the size of 200mm multiplied by 200mm, and the adjacent side surfaces of the copper pipe 10 are connected in a smooth transition mode through arc parts, so that four arc parts are formed; the water jacket 20 is sleeved on the copper pipe 10, and a water gap 30 is formed between the water jacket 20 and the copper pipe 10; the copper bar 40 is arranged on the outer surface of the arc part along the height direction of the copper pipe 10, and the outer surface of the copper bar 40 is an arc surface and is matched and attached with the inner surface of the water jacket 20; the arc length of the outer surface of the copper bar 40 is 20mm, the distance between the outer surface of the copper bar 40 and the outer surface of the copper pipe 10 is 6mm, and the height of the copper bar 40 is 100 mm; the number of the copper bars 40 is 12, and 3 copper bars 40 are distributed on each arc part at intervals along the height direction of the copper pipe 10; the tops of the 4 copper bars 40 positioned at the upper part are 80mm lower than the tops of the copper pipes 10, the tops of the 4 copper bars 40 positioned at the middle part are 200mm lower than the tops of the copper pipes 10, and the tops of the 4 copper bars 40 positioned at the lower part are 350mm lower than the tops of the copper pipes 10; the side of the copper bar 40 is connected with the outer surface of the copper pipe 10 in a smooth transition way through an arc chamfer with the radius of 5 mm.
Compared with the existing continuous casting tubular crystallizer, the temperature of cooling water in the continuous casting process is increased by 5-6 ℃, the corner defects of a casting blank are reduced by 31%, the deformation of a measuring copper pipe 10 after the continuous casting tubular crystallizer is offline is reduced by 46%, and the service life of the crystallizer is increased by 55%.
Claims (9)
1. The continuous casting pipe type crystallizer comprises a copper pipe (10) and a water jacket (20); the copper pipe (10) is rectangular, and the adjacent side surfaces of the copper pipe (10) are connected in a smooth transition mode through arc parts; the water jacket (20) is sleeved on the copper pipe (10), and a water gap (30) is formed between the water jacket (20) and the copper pipe (10); the method is characterized in that: the copper pipe is characterized by further comprising a copper bar (40) arranged on the outer surface of the arc part along the height direction of the copper pipe (10), wherein the outer surface of the copper bar (40) is an arc-shaped surface and is matched and attached with the inner surface of the water jacket (20); the arc parts are provided with at least two copper bars (40), and the copper bars (40) on each arc part are distributed at intervals along the height direction of the copper pipe (10).
2. The continuous-casting tubular crystallizer of claim 1, wherein: the arc length of the outer surface of the copper bar (40) is 5-40 mm, and the distance between the outer surface of the copper bar (40) and the outer surface of the copper pipe (10) is 4-10 mm.
3. The continuous-casting tubular crystallizer of claim 1, wherein: the height of the copper pipe (10) is H1The height of the copper bar (40) is H2，100mm≤H2≤H1-20mm。
4. The continuous-casting tubular crystallizer of claim 3, wherein: the top of the copper bar (40) is lower than the top of the copper pipe (10) by at least 10mm, and the bottom of the copper bar (40) is higher than the bottom of the copper pipe (10) by at least 10 mm.
5. The continuous-casting tubular crystallizer of claim 1, wherein: the copper bar (40) is welded on the copper pipe (10), and the side surface of the copper bar (40) is connected with the outer surface of the copper pipe (10) in a smooth transition mode through an arc chamfer.
6. The continuous-casting tubular crystallizer of claim 5, wherein: the radius of the arc chamfer is 2-5 mm.
7. The continuous-casting tubular crystallizer of any one of claims 1 to 6, wherein: the distance between two adjacent copper bars (40) on the circular arc part is 50-400 mm.
8. The continuous-casting tubular crystallizer of claim 7, wherein: the copper bar (40) is located the middle part reinforcing area of copper pipe (10), the distance between the top in middle part reinforcing area and copper pipe (10) top is 80mm, and the distance between the bottom in middle part reinforcing area and copper pipe (10) top is 300 mm.
9. The continuous-casting tubular crystallizer of claim 1, wherein: the top and the bottom of the copper pipe (10) are respectively provided with a top flange and a bottom flange, and the copper pipe and the bottom flange are respectively fixed with the top and the bottom of the water jacket (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910355912.3A CN109894585B (en) | 2019-04-29 | 2019-04-29 | Continuous casting tube type crystallizer |
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| CN201910355912.3A CN109894585B (en) | 2019-04-29 | 2019-04-29 | Continuous casting tube type crystallizer |
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| CN109894585A CN109894585A (en) | 2019-06-18 |
| CN109894585B true CN109894585B (en) | 2021-01-26 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2423285A1 (en) * | 1978-04-17 | 1979-11-16 | Siderurgie Fse Inst Rech | COOLING SHIRT FOR CONTINUOUS METAL CASTING LINGOTIER |
| JPS59150644A (en) * | 1983-02-16 | 1984-08-28 | Mitsubishi Heavy Ind Ltd | Mold for continuous casting |
| DE3690795C2 (en) * | 1986-10-24 | 1990-03-08 | V N Issladovatel Skij Pk I T I | Crystallizer |
| PT1468760E (en) * | 2003-04-16 | 2005-10-31 | Concast Ag | TUBULAR INJECTION FOR CONTINUOUS LEAKING |
| CN2834740Y (en) * | 2005-08-26 | 2006-11-08 | 殷瑞国 | A novel large-billet mold tube for continuous casting machine |
| EP2014393B1 (en) * | 2007-06-04 | 2012-04-11 | Concast Ag | Mould for strand casting of blooms, cogged blooms or billets |
| CN104624990B (en) * | 2015-02-26 | 2023-08-25 | 周嘉平 | Copper pipe of uniform cooling crystallizer and manufacturing method thereof |
| CN107952943A (en) * | 2017-11-02 | 2018-04-24 | 西安交通大学 | A kind of uniform cooler crystallizer |
| CN108838352B (en) * | 2018-05-25 | 2023-08-22 | 中冶连铸技术工程有限责任公司 | Crystallizer with double water jacket structure |
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