CN117900406A - Control method for preventing blank stagnation in quick change process of casting blank tundish - Google Patents
Control method for preventing blank stagnation in quick change process of casting blank tundish Download PDFInfo
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- CN117900406A CN117900406A CN202410021968.6A CN202410021968A CN117900406A CN 117900406 A CN117900406 A CN 117900406A CN 202410021968 A CN202410021968 A CN 202410021968A CN 117900406 A CN117900406 A CN 117900406A
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- 238000000034 method Methods 0.000 title claims abstract description 79
- 238000005266 casting Methods 0.000 title claims abstract description 62
- 230000008569 process Effects 0.000 title claims abstract description 37
- 230000008859 change Effects 0.000 title claims description 17
- 238000009749 continuous casting Methods 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 239000000498 cooling water Substances 0.000 claims description 19
- 238000005192 partition Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Classifications
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- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
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- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/182—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by measuring temperature
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- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
- B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling
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Abstract
The application provides a control method for preventing blank stagnation in a quick-change process of a casting blank tundish, which comprises the following steps: in the quick-change process of the tundish, controlling the large-area water flow of the crystallizer in a preset flow range, and controlling the water inlet temperature of the crystallizer in a preset temperature range; the method comprises the steps of obtaining the pulling speed of a pulling and straightening machine, and reducing the pulling speed of the pulling and straightening machine to a first preset pulling speed value and maintaining the first time before casting the casting blank to a preset length threshold value in a specified length; reducing the pulling speed of the pulling and straightening machine to a second preset pulling speed value, and maintaining the second time; and reducing the pulling speed of the pulling and straightening machine to a third preset pulling speed value, and after casting the steel ladle, expanding the pulling speed of the pulling and straightening machine to a fourth preset pulling speed value, wherein the time interval from the third preset pulling speed value to the fourth preset pulling speed value of the pulling and straightening machine is smaller than or equal to a preset time threshold. The application can effectively solve the problem of blank stagnation caused by blank bulging in the quick-change process of the tundish, stabilizes on-site production, realizes flexible continuous casting of the continuous casting machine, and has important significance in releasing production capacity.
Description
Technical Field
The application relates to the technical field of continuous casting, in particular to a control method for preventing a casting blank from being stagnated in a quick change process of a casting blank tundish.
Background
The continuous casting high-efficiency production is the development trend of the modern high-efficiency continuous casting machine, and in order to improve the operation rate of the continuous casting machine, a tundish quick-change technology is generally adopted, and the technological process is as follows: when the pouring of the poured tundish (called an old tundish) is finished, an unprimed new tundish (called a new tundish) is quickly moved to a pouring location, and the continuous pouring process control of the casting machine is maintained.
For the steel grade with low high-temperature heat conductivity coefficient and low high-temperature strength, in the quick-change process of the tundish, the pulling speed is reduced to stop and restart, the flow of secondary cooling water is changed, the pulling speed is reduced, the flow of secondary cooling water is changed, the time is required for changing, the phenomenon that a casting blank does not walk easily occurs in the process, the casting blank is stagnated, and the operation rate of the continuous casting machine is seriously influenced. Therefore, by optimizing technological parameters such as the drawing speed, the secondary cooling water quantity, the drawing pressure and the like, the method solves the problem of blank stagnation risk of the steel with low high-temperature heat conductivity coefficient and low high-temperature strength in the quick-change process of the tundish, realizes flexible continuous casting of the continuous casting machine, and has important significance in releasing production capacity.
Disclosure of Invention
The application aims to provide a control method for preventing blank stagnation in the quick-change process of a casting blank tundish, which can effectively solve the blank stagnation accident caused by the bulging of the casting blank in the quick-change process of the tundish, stabilizes field production, realizes flexible continuous casting of a continuous casting machine, and has important significance in releasing production capacity.
In order to achieve the above object, the present application provides a control method for preventing a casting blank from being stagnated in a quick-change process of a casting blank tundish, which is applied to continuous casting equipment, wherein the continuous casting equipment comprises a ladle, a tundish, a crystallizer, two cold water areas and a withdrawal and straightening machine, the two cold water areas comprise 10 subareas which are sequentially arranged along a production direction, the withdrawal and straightening machine comprises 14 sector sections which are sequentially arranged along the production direction, and the control method comprises:
In the quick-change process of the tundish, controlling the large-area water flow of the crystallizer in a preset flow range, and controlling the water inlet temperature of the crystallizer in a preset temperature range;
The method comprises the steps of obtaining the pulling speed of a pulling and straightening machine, and reducing the pulling speed of the pulling and straightening machine to a first preset pulling speed value and maintaining the first time before casting the casting blank to a preset length threshold value in a specified length;
reducing the pulling speed of the pulling and straightening machine to a second preset pulling speed value, and maintaining the second time;
And reducing the pulling speed of the pulling and straightening machine to a third preset pulling speed value, and after casting the steel ladle, expanding the pulling speed of the pulling and straightening machine to a fourth preset pulling speed value, wherein the time interval from the third preset pulling speed value to the fourth preset pulling speed value of the pulling and straightening machine is smaller than or equal to a preset time threshold.
In some embodiments of the present application, based on the foregoing solution, before the step of reducing the pull rate of the pull leveler to the first preset pull rate value, the control method further includes:
and (3) keeping the immersed nozzle of the tundish immersed in molten steel in the crystallizer, and controlling the height difference between the immersed nozzle of the tundish and the molten steel level in the crystallizer to be a preset difference value.
In some embodiments of the application, the preset difference is 100-120 mm based on the foregoing scheme.
In some embodiments of the present application, based on the foregoing solution, while reducing the pull rate of the pull leveler to a first preset pull rate value and maintaining the first time, the control method further includes:
The inner and outer arc secondary cooling water flow rates of the 1 st to 4 th subareas are increased by a first preset percentage, and the inner and outer arc secondary cooling water flow rates of the 5 th subarea and the 6 th subarea are reduced by a second preset percentage.
In some embodiments of the application, the first preset percentage is 20% to 25% and the second preset percentage is 10% to 15% based on the foregoing scheme.
In some embodiments of the present application, based on the foregoing solution, while reducing the pull rate of the pull leveler to a second preset pull rate value and maintaining the second time, the control method further includes:
The inner and outer arc secondary cooling water flow rates of the 1 st to 4 th subareas are increased by a third preset percentage, and the inner and outer arc secondary cooling water flow rates of the 5 th subarea and the 6 th subarea are reduced by a fourth preset percentage.
In some embodiments of the application, based on the foregoing, the third preset percentage is 10% to 15%, and the fourth preset percentage is 5% to 10%.
In some embodiments of the present application, based on the foregoing solution, before the step of expanding the pull rate of the tension leveler to the fourth preset pull rate value after the ladle is opened, the control method further includes:
The drive roller pinch rolls of the 13 th segment and the 14 th segment are raised by a fifth preset percentage.
In some embodiments of the application, the fifth predetermined percentage is 10% to 20% based on the previous protocol.
In some embodiments of the present application, based on the foregoing solution, the preset flow range is 3800L/min to 4100L/min, the preset temperature range is 30 ℃ to 35 ℃, the preset length threshold is 5m, the first preset pull rate value is 0.7m/min, the first time is 60s to 90s, the second preset pull rate value is 0.4m/min, the second time is 300s to 350s, the third preset pull rate value is 0, the fourth preset pull rate value is 0.4m/min, and the preset time threshold is 160s.
The technical scheme of the application provides a control method for preventing blank stagnation in a quick change process of a casting blank tundish, which comprises the following steps: in the quick-change process of the tundish, controlling the large-area water flow of the crystallizer in a preset flow range, and controlling the water inlet temperature of the crystallizer in a preset temperature range; the method comprises the steps of obtaining the pulling speed of a pulling and straightening machine, and reducing the pulling speed of the pulling and straightening machine to a first preset pulling speed value and maintaining the first time before casting the casting blank to a preset length threshold value in a specified length; reducing the pulling speed of the pulling and straightening machine to a second preset pulling speed value, and maintaining the second time; and reducing the pulling speed of the pulling and straightening machine to a third preset pulling speed value, and after casting the steel ladle, expanding the pulling speed of the pulling and straightening machine to a fourth preset pulling speed value, wherein the time interval from the third preset pulling speed value to the fourth preset pulling speed value of the pulling and straightening machine is smaller than or equal to a preset time threshold. According to the application, by optimizing the pulling speed and the maintaining time, the secondary cooling water flow, the immersion depth, the crystallizer water temperature and the large-surface water flow of the crystallizer at different stages, the strength of an initial casting blank is improved, the bulging of the casting blank is reduced, the blank-retaining phenomenon caused by the rising of blank-pulling resistance of the casting blank, which is caused by the difficulty in deformation of the casting blank due to the large cooling strength, of the casting blank before the quick change of a tundish is reduced, the blank-retaining accident caused by the bulging of the casting blank in the quick change process of the tundish can be effectively solved, the on-site production is stabilized, the blank-retaining risk of the steel with low high-temperature heat conductivity and low high-temperature strength in the quick change process of the tundish can be particularly solved, the flexible continuous casting of the continuous casting machine is realized, and the production capacity is released, so that has important significance is achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
In the drawings:
FIG. 1 is a schematic view of a continuous casting apparatus according to an embodiment of the present application;
FIG. 2 is a flow chart of a control method for preventing blank stagnation in a quick change process of a casting blank tundish according to an embodiment of the application;
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, a schematic structural diagram of a continuous casting apparatus according to an embodiment of the present application is provided, where the continuous casting apparatus includes a ladle 1, a tundish 3, a crystallizer 4, a second cooling water area and a withdrawal and straightening machine, the second cooling water area includes 10 sections sequentially arranged along a production direction, and the withdrawal and straightening machine includes 14 sections of fan-shaped sections sequentially arranged along the production direction.
Among 10 sections of the secondary cooling water area, the 1 st section is a crystallizer foot roller, and the 2 nd to 4 th sections are 0 sections. Of the 14-section segments of the tension leveler, the 1 st to 6 th segment segments are arc-shaped segment A, the 7 th to 8 th segment segments are straightening segment B, and the 9 th to 14 th segment segments are horizontal segment C.
And, the 5 th partition corresponds to the 1 st segment sector, the 6 th partition corresponds to the 2 nd to 3 rd segment sector, the 7 th partition corresponds to the 4 th to 5 th segment sector, the 8 th partition corresponds to the 6 th to 8 th segment sector, the 9 th partition corresponds to the 9 th to 11 th segment sector, and the 10 th partition corresponds to the 12 th to 14 th segment sector. The inner and outer arcs of the 5 th to 8 th subareas are respectively provided with two nozzles, and the outer arcs of the 9 th to 10 th subareas are respectively provided with 1 nozzle for supplying transverse water.
As shown in fig. 2, an embodiment of the present application provides a control method for preventing a casting blank from being stagnated in a quick-change process of a casting blank tundish, which is applied to continuous casting equipment, and the control method includes:
Step S1, controlling the large-area water flow of a crystallizer in a preset flow range and controlling the water inlet temperature of the crystallizer in a preset temperature range in the quick-change process of the tundish;
in some embodiments, the preset flow range is 3800L/min to 4100L/min and the preset temperature range is 30 ℃ to 35 ℃.
S2, obtaining the pulling speed of the withdrawal and straightening machine, and reducing the pulling speed of the withdrawal and straightening machine to a first preset pulling speed value and maintaining the first time before casting the casting blank to a preset length threshold value in a specified length;
Since the density of molten steel is a fixed value, the weight per unit (per meter) of cast slab can be calculated from the width and thickness of cast slab, and the pouring surplus length (meters) for performing the tundish quick change can be calculated by performing the tundish quick change when the residual weight of molten steel in the tundish is a certain set value (for example, 10 t). Assuming that the pouring length is 10m and then the tundish is quickly changed, the pulling speed is changed before the casting blank is poured to 5m (a preset length threshold value) in a specified length.
Specifically, the preset length threshold is 5m, the first preset pulling speed value is 0.7m/min, and the first time is 60-90 s.
In some embodiments, before the step of reducing the pull rate of the tension leveler to the first preset pull rate value, the control method further includes:
and (3) keeping the immersed nozzle of the tundish immersed in molten steel in the crystallizer, and controlling the height difference between the immersed nozzle of the tundish and the molten steel level in the crystallizer to be a preset difference value.
Specifically, the preset difference is 100-120 mm.
In some embodiments, while reducing the pull rate of the pull leveler to a first preset pull rate value and maintaining the first time, the control method further includes:
The inner and outer arc secondary cooling water flow rates of the 1 st to 4 th subareas are increased by a first preset percentage, and the inner and outer arc secondary cooling water flow rates of the 5 th subarea and the 6 th subarea are reduced by a second preset percentage.
Specifically, the first preset percentage is 20% -25%, and the second preset percentage is 10% -15%.
S3, reducing the pulling speed of the pulling and straightening machine to a second preset pulling speed value, and maintaining the second time;
Specifically, the second preset pulling speed value is 0.4m/min, and the second time is 300 s-350 s.
In some embodiments, while reducing the pull rate of the pull leveler to a second preset pull rate value and maintaining the second time, the control method further includes:
The inner and outer arc secondary cooling water flow rates of the 1 st to 4 th subareas are increased by a third preset percentage, and the inner and outer arc secondary cooling water flow rates of the 5 th subarea and the 6 th subarea are reduced by a fourth preset percentage.
Specifically, the third preset percentage is 10% -15%, and the fourth preset percentage is 5% -10%.
And S4, reducing the pulling speed of the pulling and straightening machine to a third preset pulling speed value, and after casting the steel ladle, expanding the pulling speed of the pulling and straightening machine to a fourth preset pulling speed value, wherein the time interval from the third preset pulling speed value to the fourth preset pulling speed value of the pulling and straightening machine is smaller than or equal to a preset time threshold.
Specifically, the third preset pull rate value is 0, the fourth preset pull rate value is 0.4m/min, and the preset time threshold value is 160s. I.e. the time interval for restarting is controlled within 160s.
In some embodiments, before the step of expanding the pull rate of the withdrawal and straightening machine to the fourth preset pull rate value after the ladle is opened, the control method further includes:
The drive roller pinch rolls of the 13 th segment and the 14 th segment are raised by a fifth preset percentage.
Specifically, the fifth preset percentage is 10% -20%.
By improving the pressure of the driving roller pressed compact, the casting blank can be pulled out conveniently, and the service life and the precision of the sector section of the withdrawal and straightening machine can be ensured.
The bulging of the cast slab refers to a phenomenon in which a solidified shell on the surface of the cast slab is deformed convexly due to the action of the hydrostatic pressure of the molten steel in the interior. It occurs mostly on the wide surface of slab, and is one of the common shape defects of slab continuous casting billets. Along with the bulging of the casting blank, the casting blank is mostly provided with surface longitudinal cracks, corner longitudinal cracks and internal crack defects.
And the blank drum can cause the blank, that prevents the blank drum just needs to improve the thickness and the intensity of solidifying the shell, improves shell intensity and thickness, just needs to improve cooling strength, and that improves cooling strength just needs:
1. Reducing the water temperature;
2. the water flow rate is improved;
3. the immersion depth is reduced, so that the temperature of molten steel at the middle and lower parts of the crystallizer and the flushing of the casting blank shell at the middle and lower parts can be reduced;
4. The proper pulling speed control is that the pulling speed is low, the thickness of the blank shell is naturally thick, but the pulling speed cannot be infinitely reduced, the proper pulling speed control can also prevent the blank from bulging, if the bulging is carried out for a long time, the bulging becomes hard, the blank cannot be pressed back, and the blank is stagnated.
Based on the method, the technical scheme of the application improves the strength of an initial casting blank, reduces the bulging of the casting blank, reduces the blank-retaining phenomenon caused by rising of blank-pulling resistance of the casting blank, which is caused by difficult deformation of the casting blank and is caused by high cooling strength, of the casting blank before quick-changing of the tundish, can effectively solve the blank-retaining accident caused by bulging of the casting blank in the quick-changing process of the tundish, stabilizes field production, can particularly solve the blank-retaining risk of the steel with low high-temperature heat conductivity coefficient and low high-temperature strength in the quick-changing process of the tundish, realizes flexible continuous casting of the continuous casting machine, and has important significance for releasing production capacity.
In summary, the control method for preventing the blank stagnation in the quick change process of the casting blank tundish provided by the application comprises the following steps: in the quick-change process of the tundish, controlling the large-area water flow of the crystallizer in a preset flow range, and controlling the water inlet temperature of the crystallizer in a preset temperature range; the method comprises the steps of obtaining the pulling speed of a pulling and straightening machine, and reducing the pulling speed of the pulling and straightening machine to a first preset pulling speed value and maintaining the first time before casting the casting blank to a preset length threshold value in a specified length; reducing the pulling speed of the pulling and straightening machine to a second preset pulling speed value, and maintaining the second time; and reducing the pulling speed of the pulling and straightening machine to a third preset pulling speed value, and after casting the steel ladle, expanding the pulling speed of the pulling and straightening machine to a fourth preset pulling speed value, wherein the time interval from the third preset pulling speed value to the fourth preset pulling speed value of the pulling and straightening machine is smaller than or equal to a preset time threshold. The application can effectively solve the problem of blank stagnation caused by blank bulging in the quick-change process of the tundish, stabilizes on-site production, realizes flexible continuous casting of the continuous casting machine, and has important significance in releasing production capacity.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. The control method for preventing blank stagnation in the quick-change process of a casting blank tundish is characterized by being applied to continuous casting equipment, wherein the continuous casting equipment comprises a ladle, a tundish, a crystallizer, two cold water areas and a withdrawal and straightening machine, the two cold water areas comprise 10 subareas which are sequentially arranged along the production direction, the withdrawal and straightening machine comprises 14 sector sections which are sequentially arranged along the production direction, and the control method comprises the following steps:
In the quick-change process of the tundish, controlling the large-area water flow of the crystallizer in a preset flow range, and controlling the water inlet temperature of the crystallizer in a preset temperature range;
the method comprises the steps of obtaining the pulling speed of the pulling and straightening machine, reducing the pulling speed of the pulling and straightening machine to a first preset pulling speed value and maintaining the first time before casting the casting blank to a preset length threshold value in a specified length;
Reducing the pulling speed of the pulling and straightening machine to a second preset pulling speed value, and maintaining the second time;
And reducing the pulling speed of the pulling and straightening machine to a third preset pulling speed value, and after casting the steel ladle, expanding the pulling speed of the pulling and straightening machine to a fourth preset pulling speed value, wherein the time interval from the third preset pulling speed value to the fourth preset pulling speed value of the pulling and straightening machine is smaller than or equal to a preset time threshold.
2. The control method for preventing a blank from being stagnated in a quick change process of a casting blank tundish according to claim 1, wherein before the step of reducing the withdrawal speed of the withdrawal and straightening machine to a first preset withdrawal speed value, the control method further comprises:
And (3) keeping the immersed nozzle of the tundish immersed in molten steel in the crystallizer, and controlling the height difference between the immersed nozzle of the tundish and the molten steel level in the crystallizer to be a preset difference value.
3. The control method for preventing blank stagnation in a quick change process of a casting blank tundish according to claim 2, wherein the preset difference is 100-120 mm.
4. The control method for preventing a blank stagnation in a quick change process of a casting blank tundish according to claim 1, wherein the control method further comprises, while the step of reducing the withdrawal speed of the withdrawal and straightening machine to a first preset withdrawal speed value and maintaining the first time:
The inner and outer arc secondary cooling water flow rates of the 1 st to 4 th subareas are increased by a first preset percentage, and the inner and outer arc secondary cooling water flow rates of the 5 th subarea and the 6 th subarea are reduced by a second preset percentage.
5. The control method for preventing blank stagnation in a quick change process of a casting blank tundish according to claim 4, wherein the first preset percentage is 20% -25% and the second preset percentage is 10% -15%.
6. The control method for preventing a blank from being stagnated in a quick change process of a casting blank tundish according to claim 1, wherein the control method further comprises, while the step of reducing the withdrawal speed of the withdrawal and straightening machine to a second preset withdrawal speed value and maintaining the second time:
The inner and outer arc secondary cooling water flow rates of the 1 st to 4 th subareas are increased by a third preset percentage, and the inner and outer arc secondary cooling water flow rates of the 5 th subarea and the 6 th subarea are reduced by a fourth preset percentage.
7. The control method for preventing blank stagnation in a quick change process of a casting blank tundish according to claim 6, wherein the third preset percentage is 10% -15% and the fourth preset percentage is 5% -10%.
8. The control method for preventing a blank from being stagnated in a quick-change process of a casting blank tundish according to claim 1, wherein before the step of expanding the withdrawal speed of the withdrawal and straightening machine to a fourth preset withdrawal speed value after the ladle is opened, the control method further comprises:
The drive roller pinch rolls of the 13 th segment and the 14 th segment are raised by a fifth preset percentage.
9. The control method for preventing a billet from being stagnated in a rapid exchange process of a casting blank tundish according to claim 8, wherein the fifth preset percentage is 10% -20%.
10. The control method for preventing a blank from being stagnated in a quick-change process of a casting blank tundish according to claim 1, wherein the preset flow range is 3800-4100L/min, the preset temperature range is 30-35 ℃, the preset length threshold is 5m, the first preset pulling speed value is 0.7m/min, the first time is 60-90 s, the second preset pulling speed value is 0.4m/min, the second time is 300-350 s, the third preset pulling speed value is 0, the fourth preset pulling speed value is 0.4m/min, and the preset time threshold is 160s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410021968.6A CN117900406A (en) | 2024-01-05 | 2024-01-05 | Control method for preventing blank stagnation in quick change process of casting blank tundish |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410021968.6A CN117900406A (en) | 2024-01-05 | 2024-01-05 | Control method for preventing blank stagnation in quick change process of casting blank tundish |
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| CN117900406A true CN117900406A (en) | 2024-04-19 |
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