CN117773045A - Spraying device of continuous casting machine secondary cooling system - Google Patents
Spraying device of continuous casting machine secondary cooling system Download PDFInfo
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- CN117773045A CN117773045A CN202311642992.3A CN202311642992A CN117773045A CN 117773045 A CN117773045 A CN 117773045A CN 202311642992 A CN202311642992 A CN 202311642992A CN 117773045 A CN117773045 A CN 117773045A
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- cooling
- area
- foot roller
- nozzles
- spray
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- 238000001816 cooling Methods 0.000 title claims abstract description 83
- 238000009749 continuous casting Methods 0.000 title claims abstract description 28
- 238000005507 spraying Methods 0.000 title claims abstract description 24
- 239000007921 spray Substances 0.000 claims abstract description 57
- 238000005266 casting Methods 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 9
- 238000005096 rolling process Methods 0.000 abstract description 9
- 238000009628 steelmaking Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000002436 steel type Substances 0.000 description 2
- 241000826860 Trapezium Species 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000006032 tissue transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Continuous Casting (AREA)
Abstract
The invention relates to a spraying device of a secondary cooling system of a continuous casting machine, and belongs to the field of steelmaking continuous casting. The casting blank cooling device comprises a foot roller area, a second cooling first area, a second cooling second area and a second cooling third area which are concentric with an arc-shaped casting blank and are sequentially arranged around the casting blank, wherein the foot roller area comprises an annular foot roller bracket, a spray pipe and a spray nozzle which are arranged around the casting blank; the first cooling area, the second cooling area and the third cooling area respectively comprise a linear foot roller bracket, a spray pipe and a nozzle arranged on the linear foot roller bracket. The nozzle spacing is 200mm, the nozzle type of the foot roller area is a deflection fan-shaped nozzle, and the water spraying distance is 102mm; the nozzle types of the two-cooling first, second and third areas are deflection fan-shaped nozzles, and the water spraying distance is 130mm. The invention improves the secondary cooling effect on casting blanks by optimizing the density, the water spraying distance and the type of the nozzles in the spraying device, improves and stabilizes the quality of the casting blanks, meets the production requirement of the double high-rod rolling mill, and ensures the smooth production.
Description
Technical Field
The invention belongs to the field of steelmaking continuous casting, and relates to a spraying device of a secondary cooling system of a continuous casting machine.
Background
The secondary cooling of continuous casting is an important process in the continuous casting steelmaking process, and the casting blank is forcedly and uniformly cooled in the length interval from the outlet of the crystallizer to the withdrawal and straightening machine; this zone is called the secondary cooling zone, and is provided with a water spray system and a series of nip rolls arranged in a straight line or an arc.
The casting blank is subjected to shell crystallization in a crystallizer and is internally cooled when passing through a secondary cooling zone so as to achieve an ideal cooling effect; firstly, the secondary cooling can enable the surface of the casting blank to be rapidly cooled, reduce the thermal stress in the casting blank and avoid cracks in the casting blank. Meanwhile, the secondary cooling can promote the crystallization and the tissue transformation of the casting blank, and the compactness and the mechanical property of the casting blank are improved.
If the secondary cooling is insufficient, the casting blank may have conditions such as 'bulging', 'steps', 'trapezium', and the like, which affect the shape and size of the casting blank, even lead to cracks and waste products, generate pressure strain on the blank shell, and the like, and flow out internal molten steel, and damage machine equipment and even cause serious production accidents such as fire and the like due to the fact that the temperature of the internal molten steel is up to one thousand or more degrees; if the secondary cooling is too strong, hardening tissues and cracks may appear in the casting blank, and the quality of the casting blank is also affected.
Therefore, the secondary cooling of continuous casting has an important influence on the quality of the cast slab.
Continuous casting secondary cooling is not simply a cooling, especially in the field of complex steel production, and many different influencing factors have to be taken into account. For the casting blank production of different steel types and specifications, different cooling systems are required to be respectively arranged so as to ensure that the two-cooling system for continuous casting of the plate blank and the long material has enough cooling capacity, and each production process flow has unique requirements for different installation types, different steel production modes and different steel types. Currently there is no unified standard solution due to the various different requirements.
The continuous casting secondary cooling process flow mainly realizes the cooling of the surface of a casting blank by spraying water and is the only controllable part in a secondary cooling system. In the secondary cooling system, the nozzle arrangement and the process parameters determine the characteristics of the water spray cooling system, the nozzle arrangement determines the area where spray cooling of the surface of the casting blank occurs, and the process parameters of the nozzle, such as the set pressure and flow rate, determine the cooling strength and the water distribution on the surface of the casting blank. The nozzle arrangement and the process parameters thus determine the cooling and solidification of the cast strand, i.e. whether the nozzle is able to carry heat away from the surface of the cast strand uniformly and effectively.
If the quality of the casting blank is required to be improved and stabilized, the arrangement and the technological parameters of the nozzles, such as the arrangement and the type selection of the nozzles, the water distribution of the nozzles and the like, are required to be optimized.
Disclosure of Invention
In view of the above, the invention aims to provide a spray device of a secondary cooling system of a continuous casting machine, which optimizes the arrangement and technological parameters of nozzles, optimizes the water distribution and flow of the secondary cooling system, improves and stabilizes the quality of casting blanks, and ensures stable and smooth production.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a spray set of two cold systems of conticaster for on the cooling arc casting blank, include with the foot roller region, two cold one region, two cold two regions and two cold three regions that arc casting blank concentric setting, foot roller region, two cold one region, two cold two regions and two cold three regions all encircle the setting of arc casting blank, foot roller region, two cold one region, two cold two regions and two cold three regions all are provided with the nozzle towards the arc casting blank, adjacent interval is 190 ~ 210mm between the nozzle.
Optionally, the foot roller region includes three annular foot roller supports that set gradually, every annular foot roller support all encircles the setting of arc casting blank.
Optionally, each annular foot roller support is provided with a spray pipe and a nozzle communicated with the spray pipe; and the spray pipe is also provided with a water inlet. Cooling water enters the spray pipe from the water inlet and is uniformly sprayed on the casting blank through the nozzle, so that an ideal cooling effect can be achieved.
Optionally, the annular foot roller supports are quadrilateral, and two nozzles are arranged on each side of each annular foot roller support.
Optionally, the water spraying distance of the nozzles in the foot roller area is 92-112 mm.
Optionally, the nozzles of the foot roller region are deflection fan nozzles (PZ type).
Optionally, the two-cooling-one area, the two-cooling-two area and the two-cooling-three area are all provided with four linear foot roller supports around the arc casting blank, and the linear foot roller supports are parallel to the arc casting blank.
Optionally, each straight foot roller bracket is provided with a spray pipe and a nozzle communicated with the spray pipe; and the spray pipe is also provided with a water inlet. Cooling water enters the spray pipe from the water inlet and is uniformly sprayed on the casting blank through the nozzle, so that an ideal cooling effect can be achieved.
Optionally, in the second cooling first area, 14 nozzles are arranged on each linear foot roller bracket; in the secondary cooling area, 6 nozzles are arranged on each linear foot roller bracket; in the second-third cooling area, 10 nozzles are arranged on each linear foot roller support.
Optionally, the nozzles in the two-cooling-one area, the two-cooling-two area and the two-cooling-three area are deflection fan-shaped nozzles (PZ type), and the water spraying distance of the nozzles is 120-140 mm.
The invention has the beneficial effects that:
the invention improves the secondary cooling effect of the casting blank by optimizing the density, the water spraying distance and the type of the nozzles in the spraying device of the secondary cooling system of the continuous casting machine, and further optimizes the water distribution and the flow of the secondary cooling system, thereby improving and stabilizing the quality of the casting blank, meeting the production requirement of a double high-rod rolling mill and ensuring the smooth production.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic plan layout of a spray device of a secondary cooling system of a continuous casting machine;
FIG. 2 is a schematic plan view of a foot roller region;
FIG. 3 is a schematic plan view of a two-cold-one region, a two-cold-two region, and a three-cold-two region;
FIG. 4 is a schematic cross-sectional view of a foot roll area;
FIG. 5 is a schematic cross-sectional view of a two-cold-one region, a two-cold-two region, and a three-cold-two region.
Reference numerals:
1 casting blank, 2 annular foot roller supports, 3 linear foot roller supports, 4 spray pipes and 5 nozzles.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1 to 5, a spray device of a secondary cooling system of a continuous casting machine is used for cooling an arc-shaped casting blank 1, and comprises a foot roller region, a secondary cooling primary region, a secondary cooling secondary region and a secondary cooling tertiary region which are concentric with the arc-shaped casting blank 1 and are sequentially arranged around the casting blank 1.
The foot roller region comprises three annular foot roller supports 2 which are sequentially arranged, each annular foot roller support 2 is quadrilateral, and a casting blank 1 is surrounded inside the annular foot roller supports 2; the upper part of each row of annular foot roller supports 2 is provided with a spray pipe 4, 8 spray nozzles 5 are also uniformly arranged, namely, each side of each annular foot roller support 2 is provided with two spray nozzles 5, the spray nozzles 5 are communicated with the spray pipe 4, and cooling water flowing in through a water inlet on the spray pipe 4 is sprayed onto the casting blank 1 through the spray nozzles 5.
The annular foot roller supports 2 in the foot roller region are about 200mm apart, the nozzles 5 are deflection fan-shaped nozzles (PZ type), and the water spray distance of the nozzles 5 is about 102mm.
The two-cooling first area, the two-cooling second area and the two-cooling third area comprise 4 linear foot roller supports 3, the trend of the 4 linear foot roller supports 3 is consistent with that of the casting blank 1, and the two-cooling first area, the two-cooling second area and the two-cooling third area are all arranged around the casting blank 1; each straight foot roller bracket 3 is provided with a spray pipe 4 in the same direction with the straight foot roller bracket, and each spray pipe 4 is provided with a water inlet.
The two-cooling-one area further comprises nozzles 5 which are uniformly arranged on the linear foot roller supports 3 and are communicated with the spray pipes 4, 14 nozzles 5 are arranged on each linear foot roller support 3, namely 14 rows of nozzles 5 are arranged in the two-cooling-one area, 4 nozzles 5 are arranged in each row, and the distance between every two adjacent nozzles 5 is about 200mm.
The two-cooling two-area further comprises nozzles 5 which are uniformly arranged on the linear foot roller supports 3 and are communicated with the spray pipes 4, 6 nozzles 5 are arranged on each linear foot roller support 3, namely, 6 rows of nozzles 5 are arranged in the two-cooling two-area, 4 nozzles 5 are arranged in each row, and the distance between every two adjacent nozzles 5 is about 200mm.
The two-cooling three-area further comprises nozzles 5 which are uniformly arranged on the linear foot roller supports 3 and are communicated with the spray pipes 4, 10 nozzles 5 are arranged on each linear foot roller support 3, namely 10 rows of nozzles 5 are arranged in the two-cooling one-area, 4 nozzles 5 are arranged in each row, and the distance between every two adjacent nozzles 5 is about 200mm.
The nozzles 5 in the two-cooling-one area, the two-cooling-two area and the two-cooling-three area are deflection fan-shaped nozzles (PZ) and the water spraying distance is about 130mm.
The spray angle of the deflection fan nozzle (PZ type) can be adjusted according to actual needs. Such nozzles are typically composed of a nozzle body and a spray device composed of an air cap and a liquid cap. The nozzle body is usually provided with an adjusting needle valve, and the flow rate of the nozzle can be changed by adjusting the needle valve. The spray shape of the PZ deflection fan nozzle may be circular, fan-shaped, or 360 degree annular. The nozzle has wide applicability and can be applied to the fields of liquid, air and steam jet, conveyor belt cooling film washing, water curtain fire prevention and the like. Under the same pressure, the spray generated by the PZ type deflection fan-shaped nozzle is uniformly distributed, the size of liquid drops is medium, and the striking force is high.
The invention adopts the deflection fan-shaped nozzle (PZ type) to ensure that the quantity of cooling water sprayed on the casting blank is more uniform, thereby achieving the beneficial effect of uniform cooling.
The spray nozzles 5 of the spray system are arranged in a single flow, i.e. the spray nozzles 5 only play a role in a unidirectional flow in the continuous casting machine. In particular, the nozzle 5 achieves a directional flow of the liquid metal by withdrawing the liquid metal or other fluid from the supply line and injecting it into the casting mold of the continuous casting machine.
After the arrangement of the spraying system is finished, the spraying system is required to be detected, the interval error of the nozzles 5 is within +/-10 mm, the deviation of the distance between the nozzles 5 and the blank surface is within +/-10 mm (namely the water spraying distance), and the straightness error of the nozzles 5 is within +/-10 mm.
The straightness of the nozzle 5 refers to an included angle between the direction of water flow sprayed by the nozzle 5 and the axis of the nozzle. If the straightness of the nozzle 5 is poor, the sprayed water flow is dispersed, and the water spraying effect is affected, so that the straightness of the nozzle 5 needs to be controlled to achieve the ideal water spraying effect. The desired straightness can be achieved by adjusting the structure and parameters of the nozzle 5, for example, by changing the design of the flow channels inside the nozzle 5, optimizing the structure of the nozzle 5, selecting a suitable material for the nozzle 5, etc.
The spraying device can be used for meeting the production requirement of a double-high-rod rolling mill, wherein the double-high-rod rolling mill is a rolling mill for producing high-precision and high-quality bars, and the characteristics of the double-high-rod rolling mill include high precision, high efficiency, high automation, high reliability and the like. The double high bar mill is usually composed of two roughing mills, a middle mill and a finishing mill, and bars with different specifications can be produced. In the production process of the double high-rod rolling mill, raw materials need to be strictly checked and screened so as to ensure that the quality of the produced bars meets the requirements. In addition, the control system of the double high rod rolling mill generally adopts an advanced computer control system, so that automatic control and adjustment can be realized, and the production efficiency and the product quality are improved.
The invention improves the secondary cooling effect of the casting blank 1 by optimizing the density, the water spraying distance and the type of the spray nozzles 5 in the spraying device of the secondary cooling system of the continuous casting machine, and further optimizes the water distribution and the flow of the secondary cooling system, thereby improving and stabilizing the quality of the casting blank 1, meeting the production requirement of a double high-rod rolling mill and ensuring the smooth production.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a spray set of two cold systems of conticaster for on the cooling arc casting blank (1), include with the sufficient roller region, two cold one region, two cold two regions and two cold three regions of arc casting blank (1) concentric setting, sufficient roller region, two cold one region, two cold two regions and two cold three regions all encircle arc casting blank (1) set up its characterized in that: the foot roller region, the two-cooling first region, the two-cooling second region and the two-cooling third region are respectively provided with nozzles (5) facing the arc casting blank (1), and the distance between every two adjacent nozzles (5) is 190-210 mm.
2. The spray device of a two-cooling system of a continuous casting machine according to claim 1, wherein: the foot roller region comprises three annular foot roller supports (2) which are sequentially arranged, and each annular foot roller support (2) is arranged around the arc-shaped casting blank (1).
3. The spray device of a two-cooling system of a continuous casting machine according to claim 2, wherein: each annular foot roller bracket (2) is provided with a spray pipe (4) and a nozzle (5) communicated with the spray pipes (4); and a water inlet is also formed in the spray pipe (4).
4. The spray device of a two-cooling system of a continuous casting machine according to claim 3, wherein: the annular foot roller supports (2) are quadrilateral, and two nozzles (5) are arranged on each side of each annular foot roller support (2).
5. The spray device of the two-cooling system of the continuous casting machine according to claim 4, wherein: the water spraying distance of the spray nozzle (5) in the foot roller area is 92-112 mm.
6. The spray device of the secondary cooling system of the continuous casting machine according to any one of claims 1 to 5, wherein: the nozzles (5) of the foot roller area are deflection fan-shaped nozzles.
7. The spray device of a two-cooling system of a continuous casting machine according to claim 1, wherein: four linear foot roller supports (3) are arranged around the arc-shaped casting blank (1) in the two-cooling-one area, the two-cooling-two area and the two-cooling-three area, and the linear foot roller supports (3) are parallel to the arc-shaped casting blank (1).
8. The spray device of the two-cooling system of the continuous casting machine according to claim 7, wherein: each straight foot roller bracket (3) is provided with a spray pipe (4) and a nozzle (5) communicated with the spray pipes (4); and a water inlet is also formed in the spray pipe (4).
9. The spray device of a two-cooling system of a continuous casting machine according to claim 8, wherein: in the two-cooling-one area, 14 nozzles (5) are arranged on each linear foot roller bracket (3); in the two-cooling two-area, 6 nozzles (5) are arranged on each linear foot roller bracket (3); in the second cooling area and the third cooling area, 10 nozzles (5) are arranged on each linear foot roller bracket (3).
10. The spray device of a two-cooling system of a continuous casting machine according to any one of claims 7 to 9, characterized in that: the nozzles (5) in the two-cooling-one area, the two-cooling-two area and the two-cooling-three area are deflection fan-shaped nozzles, and the water spraying distance of the nozzles (5) is 120-140 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311642992.3A CN117773045A (en) | 2023-12-01 | 2023-12-01 | Spraying device of continuous casting machine secondary cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311642992.3A CN117773045A (en) | 2023-12-01 | 2023-12-01 | Spraying device of continuous casting machine secondary cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117773045A true CN117773045A (en) | 2024-03-29 |
Family
ID=90386297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311642992.3A Pending CN117773045A (en) | 2023-12-01 | 2023-12-01 | Spraying device of continuous casting machine secondary cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117773045A (en) |
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2023
- 2023-12-01 CN CN202311642992.3A patent/CN117773045A/en active Pending
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