CN117139583A - Process control method for reducing residual steel poured in multi-machine multi-flow continuous casting tundish - Google Patents
Process control method for reducing residual steel poured in multi-machine multi-flow continuous casting tundish Download PDFInfo
- Publication number
- CN117139583A CN117139583A CN202311025849.XA CN202311025849A CN117139583A CN 117139583 A CN117139583 A CN 117139583A CN 202311025849 A CN202311025849 A CN 202311025849A CN 117139583 A CN117139583 A CN 117139583A
- Authority
- CN
- China
- Prior art keywords
- casting
- flow
- tundish
- continuous casting
- ladle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 74
- 239000010959 steel Substances 0.000 title claims abstract description 74
- 238000009749 continuous casting Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004886 process control Methods 0.000 title claims abstract description 14
- 238000005266 casting Methods 0.000 claims abstract description 105
- 238000005520 cutting process Methods 0.000 claims abstract description 20
- 238000004513 sizing Methods 0.000 claims abstract description 7
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002893 slag Substances 0.000 description 12
- 239000007788 liquid Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000024121 nodulation Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000002699 waste material Substances 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/003—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with impact pads
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention relates to a process control method for reducing residual steel poured by a multi-machine multi-stream continuous casting tundish, belonging to the technical field of continuous casting in the metallurgical industry. The technical proposal is as follows: (1) The tundish bottom is of a stepped ladle bottom structure, the distance between the upper through hole of the retaining wall and the ladle bottom of the impact area is 8-15mm, and a fusible baffle is arranged inside the retaining wall; (2) When the last furnace of the casting times is cast to the middle stage, reducing the continuous casting pulling rate; (3) Before the last furnace of molten steel is refined and discharged, the discharge temperature is increased; (4) When the flow is closed, preferentially closing the side flow far away from the impact area of the tundish, sequentially closing the side flow from outside to inside, and finally closing the central position flow; (5) And (3) starting assembly in the time period from the middle casting period of the last casting time to the closing of the ladle, sizing according to the casting blank requirement, and stopping casting the side stream which is preferentially processed by the casting blank flame cutting machine to form a whole sized side stream. The beneficial effects of the invention are as follows: the residual steel of pouring ladle is effectively reduced, the quality of molten steel at the end of pouring is improved, and the consumption of steel materials is reduced.
Description
Technical Field
The invention relates to a process control method for reducing residual steel poured by a multi-machine multi-stream continuous casting tundish, belonging to the technical field of continuous casting in the metallurgical industry.
Background
The casting residue of the continuous casting tundish refers to the residual molten steel quantity in the tundish after each casting time is finished when molten steel is continuously cast, and the casting residue of the continuous casting tundish is an important index for influencing the consumption of steel materials and is also a key index for measuring the economical efficiency of a modern continuous casting machine. When the liquid level of molten steel around the immersed nozzle of the tundish is reduced below the critical height of the vortex, the vortex is generated in the position area of the immersed nozzle of the tundish, so that ladle slag and covering agent on the surface layer of the molten steel of the tundish enter a crystallizer, and casting blank slag is caused. In order to prevent slag rolling accidents of molten steel in the later pouring stage of the tundish, steel enterprises can choose the liquid level of the molten steel of the tundish to be higher than the critical height of vortex slag rolling when pouring is stopped in pouring of the tundish, so that vortex slag rolling is avoided. The higher tundish molten steel can bring larger tundish casting residue, so that the molten steel yield is at a lower level, serious waste of enterprise production cost is caused, and particularly, under the current severe market environment, how to reduce the tundish casting residue is very critical to reduce the cost and efficiency, and further reduce the consumption of steel materials.
The multi-machine multi-stream continuous casting refers to that a multi-stream casting blank is produced on a continuous casting machine by using a crystallizer vibration device and a withdrawal and straightening machine which are independently arranged for each stream, and the continuous casting machines of 3 machines 3 to 8 machines 8 streams are widely applied, and most of the continuous casting machines are square and round continuous casting blanks. One or two of the multiple flows in the production are stopped due to faults, and the other residual flows can still continuously pour one ladle of molten steel. Multi-machine multi-strand continuous casting machines generally employ a long tundish provided with a plurality of water openings identical to the number of flows in order to simultaneously feed each flow of molten steel into the mold. The flowing distance of molten steel in a long tundish is longer, the temperature loss and the temperature difference between the flows are larger, the temperature of molten steel at the water gap at the outermost side is lower, and the molten steel is easy to block; the more the flow number is, the longer the tundish is, so that a plurality of flows are stopped simultaneously in production, and the problems of low casting blank forming amount and large residual steel amount of molten steel in the tundish are caused.
At present, research on reducing the residual steel of a continuous casting tundish at home and abroad is mainly focused on the optimization of the tundish structure, for example, chinese patent application with the application number of 201720407283.0 discloses a tundish for reducing the residual steel of the continuous casting tundish, and the method is to realize the reduction of the residual steel of the tundish by opening left and right through holes on a dam in the tundish and the bottom of a stopper rod injection flow area lower than the bottom of the tundish in the casting area, and mainly aims at 1 machine 1 flow.
The Chinese patent application with the application number of 200710010179.9 discloses a treatment method for reducing residual molten steel in a continuous casting tundish, which mainly aims to reduce the temperature of liquid around a casting nozzle, reduce the slag discharging amount, promote the solidification of molten steel in the section of a tail blank and reduce the residual molten steel by changing the property of molten steel slag in the tundish and increasing the alkalinity and viscosity.
Disclosure of Invention
The invention aims to provide a process control method for reducing residual steel poured by a multi-machine multi-flow continuous casting tundish, which effectively reduces residual steel poured by the tundish, improves molten steel quality at the end of pouring, reduces iron and steel material consumption and solves the problems in the background art.
The technical scheme of the invention is as follows:
a process control method for reducing residual steel poured in a multi-machine multi-stream continuous casting tundish is characterized by comprising the following steps of: the control is performed according to the following requirements:
(1) The tundish bottom is of a stepped ladle bottom structure, the height of the impact area ladle bottom is 2-10mm higher than that of the edge flow casting area ladle bottom, and the edge flow casting area ladle bottom is 5-15mm higher than that of the central flow casting area ladle bottom; the impact zone bottom is positioned in the middle of the middle ladle bottom, the central flow casting zone bottom is a left flow bottom and a right flow bottom which are adjacent to the impact zone bottom, and the rest ladle bottoms are side flow casting zone bottoms; retaining walls are arranged on two sides of the bottom of the impact zone, through holes are formed in the retaining walls, the distance between the through holes and the bottom of the impact zone is 8-15mm, and fusible baffles matched with the through holes are arranged in the retaining walls;
(2) When the last furnace of the casting times is cast to the middle stage, reducing the continuous casting drawing speed to ensure that the central flow drawing speed is the lowest drawing speed and the side flow drawing speed is +/-0.1 m/min;
(3) Before the last furnace of molten steel is refined and discharged, calculating the casting time of the last furnace according to the casting time, and raising the discharge temperature according to the temperature drop of the casting stop extension time, wherein the raising temperature range is calculated according to 0.5-1 ℃/min;
(4) When the flow is closed, preferentially closing the side flow far away from the impact area of the tundish, sequentially closing the side flow from outside to inside, and finally closing the central position flow;
(5) Starting assembly in the time period from the middle casting period of the last casting time to the closing of the ladle, sizing according to the casting blank requirement, and stopping casting the side stream which is preferentially processed by the casting blank flame cutting machine to be a whole sized; the assembly method comprises the following steps: assuming that the distance from a casting blank cutting machine to a crystallizer outlet is N meters, the casting blank is required to be fixed in length by N meters, stopping pouring the flow if N/N is an integer, stopping pouring the flow if the result of N/N is a decimal, and stopping pouring the flow when the dimension of the casting blank after passing through the cutting position and the added dimension of the decimal casting blank before cutting are fixed in length.
According to the process control method for reducing residual steel in the multi-machine multi-stream continuous casting tundish, the impact area bottom corresponds to the continuous casting machine long nozzle, the central stream pouring area bottom corresponds to the central position stream of the continuous casting machine, the central position stream is left and right streams which are adjacent to the impact area bottom, and the side stream pouring area bottom corresponds to other streams of the continuous casting machine, namely side streams.
According to the process control method for reducing residual steel in the multi-machine multi-stream continuous casting tundish, the fusible baffle is a low-carbon steel plate with the thickness of 1-3 mm.
According to the process control method for reducing residual steel in the multi-machine multi-stream continuous casting tundish, the fusible baffle is prefabricated inside the retaining wall.
The tundish structure adopted by the invention limits the height of the through hole of the slag blocking wall to be mainly equal to the height of molten steel in the retaining wall of the impact area of the last casting furnace, and reduces the residual steel. The addition of the fusible baffle with the retaining wall through holes mainly prevents molten steel sundries of the first furnace from flushing into the stopper rod injection area when casting is started, and the molten steel liquid level is higher than the retaining wall through holes when the fusible baffle is melted by adding the fusible baffle, so that the slag on the liquid level of the tundish is prevented from entering the stopper rod injection area of the tundish to cause casting blank inclusion. The step-shaped ladle bottom is adopted, the ladle bottom around the long nozzle impact area is higher than the side flow tundish bottom, the molten steel around the impact area is mainly ensured to enter the pouring area, the tundish liquid level in the pouring area at the end of stopping pouring is improved, the side flow tundish bottom is higher than the center flow ladle bottom mainly because the side flow is stopped at first, the temperature of the side flow molten steel is generally lower, the side flow is stopped at first, the low liquid level molten steel enters the center flow ladle bottom after stopping pouring, the molten steel level of the center flow tundish is improved, the temperature of the molten steel at the center position is higher, and the molten steel remaining amount in the tundish is fully reduced.
The pulling speed is controlled, and the pulling speed is reduced mainly through the last furnace, so that the critical height of vortex generation is reduced, and meanwhile, sufficient time is provided for artificial assembly.
The superheat degree is controlled, and mainly because the last casting time needs to finish casting the molten steel in the tundish for a long time and the pulling speed needs to be reduced, the temperature of the continuous casting tundish can be reduced, and the temperature of the tundish is increased by increasing the outlet temperature, so that a foundation is laid for subsequently reducing the pulling speed and the residual steel.
The artificial assembly is mainly used for preferentially assembling the casting stop side flow, mainly because the temperature of the side flow molten steel is low, water gap nodulation is easy, meanwhile, the bottom of the side flow tundish is higher than that of the middle flow tundish, the molten steel can flow to the center flow after the vortex critical height stop casting, the whole tundish molten steel is completely cast as much as possible, meanwhile, because the computer casting blank tracking intelligent condition is lagged and the actual production change is complex, the artificial assembly is flexible, and the casting blank with qualified casting size of the casting residual components of the molten steel in the tundish can be fully used.
The beneficial effects of the invention are as follows: the residual steel of pouring ladle pouring is effectively reduced, the quality of molten steel at the end of pouring is improved, the consumption of steel materials is reduced, and the production cost of enterprises is reduced.
Drawings
FIG. 1 is a schematic diagram of a tundish according to the present invention;
in the figure: ladle 1, long nozzle 2, tundish 3, stopper rod 4, retaining wall 5, fusible retaining wall and through hole 6, tundish submersed nozzle (7, 8, 9, 10, 71, 81, 91, 101), stopper rod 11, pouring zone bottom 12 with far impact zone, pouring zone bottom 13 with near impact zone, and pouring zone bottom 14 with near impact zone.
Description of the embodiments
The invention is further illustrated by way of example with reference to the accompanying drawings.
A process control method for reducing residual steel poured by a multi-machine multi-stream continuous casting tundish is controlled according to the following requirements:
(1) The tundish bottom is of a stepped ladle bottom structure, the height of the impact area ladle bottom is 2-10mm higher than that of the edge flow casting area ladle bottom, and the edge flow casting area ladle bottom is 5-15mm higher than that of the central flow casting area ladle bottom; the impact zone bottom is positioned in the middle of the middle ladle bottom, the central flow casting zone bottom is a left flow bottom and a right flow bottom which are adjacent to the impact zone bottom, and the rest ladle bottoms are side flow casting zone bottoms; retaining walls are arranged on two sides of the bottom of the impact zone, through holes are formed in the retaining walls, the distance between the through holes and the bottom of the impact zone is 8-15mm, and fusible baffles matched with the through holes are arranged in the retaining walls;
(2) When the last furnace of the casting times is cast to the middle stage, reducing the continuous casting drawing speed to ensure that the central flow drawing speed is the lowest drawing speed and the side flow drawing speed is +/-0.1 m/min;
(3) Before the last furnace of molten steel is refined and discharged, calculating the casting time of the last furnace according to the casting time, and raising the discharge temperature according to the temperature drop of the casting stop extension time, wherein the raising temperature range is calculated according to 0.5-1 ℃/min;
(4) When the flow is closed, preferentially closing the side flow far away from the impact area of the tundish, sequentially closing the side flow from outside to inside, and finally closing the central position flow;
(5) Starting assembly in the time period from the middle casting period of the last casting time to the closing of the ladle, sizing according to the casting blank requirement, and stopping casting the side stream which is preferentially processed by the casting blank flame cutting machine to be a whole sized; the assembly method comprises the following steps: assuming that the distance from a casting blank cutting machine to a crystallizer outlet is N meters, the casting blank is required to be fixed in length by N meters, stopping pouring the flow if N/N is an integer, stopping pouring the flow if the result of N/N is a decimal, and stopping pouring the flow when the dimension of the casting blank after passing through the cutting position and the added dimension of the decimal casting blank before cutting are fixed in length.
The continuous casting machine long nozzle corresponding to the impact area bottom corresponds to a central position flow of the continuous casting machine, the central position flow is left and right flows close to the impact area bottom, and the edge flow pouring area bottom corresponds to other flows of the continuous casting machine, which are called edge flows.
The fusible baffle is a low-carbon steel plate with the thickness of 1-3 mm.
The fusible baffle is prefabricated inside the retaining wall.
Example 1
Referring to fig. 1, the continuous casting machine is an eight-machine eight-strand continuous casting machine, when a tundish is built before casting, the distance between the through hole of the retaining wall of the tundish and the bottom of the impact zone is 8mm, and the fusible baffle of the through hole of the retaining wall of the tundish with the thickness of 1mm is increased; the height of the bottom of the impact area is 210mm higher than that of the bottom of the side stream pouring area, and the bottom of the side stream pouring area is 5mm higher than that of the bottom of the central stream pouring area;
before the final molten steel refining of the first furnace comes out, the refiner calculates the casting time of the final furnace according to the casting time, and increases the temperature of the outlet according to the casting stop extension time and the increase range according to 1 ℃/min;
when the final furnace is poured to the middle stage, the integral continuous casting pulling speed is reduced, so that the central stream pulling speed is 0.8m/min, and the side stream pulling speed is 0.9m/min;
when the last furnace is poured to the middle stage, an operator starts to assemble, the side stream 7 and the side stream 71 which are far away from the impact area of the tundish are preferentially assembled, the stream 8 and the stream 81 are assembled, the side stream 8 and the side stream 81 are sequentially assembled from outside to inside, and finally the stream 10 and the stream 101 at the central position are closed;
the distance from the casting blank cutting machine of the continuous casting machine to the outlet of the crystallizer is 25 meters, the casting blank sizing requirement is 12.5 meters, the result of 25/12.5 is an integer of 2, so 7 flows and 71 flows are observed when the casting blank is finished, the 7-flow casting blank head reaches the position of the flame cutting machine, casting is stopped for the flows, and the flows 71, 8, 81, 9, 91, 10 and 101 are sequentially closed by the same method.
And after the pouring is finished, 10 flows are closed finally, 6 tons of slag are left in the medium-ladle steel, all flows except 10 flows are successfully assembled, and the 10 flows are 0.2 meter in tail billet.
Example 2
Referring to fig. 1, the continuous casting machine is an eight-machine eight-strand continuous casting machine, when a tundish is built before casting, the distance between the through hole of the retaining wall of the tundish and the bottom of the impact zone is 15mm, and a fusible baffle of the through hole of the retaining wall of the tundish is increased by 3 mm; the height of the bottom of the impact area is 10mm higher than that of the bottom of the side stream pouring area, and the bottom of the side stream pouring area is 15mm higher than that of the bottom of the central stream pouring area;
before the final molten steel refining of the first furnace comes out, the refiner calculates the casting time of the final furnace according to the casting time, and increases the temperature of the outlet according to the casting stop extension time, and the increasing range is 0.5 ℃/min;
when the final furnace is poured to the middle stage, the integral continuous casting pulling speed is reduced, so that the central stream pulling speed is 0.8m/min, and the side stream pulling speed is 0.8m/min;
when the last furnace is poured to the middle stage, an operator starts to assemble, the side stream 7 and the side stream 71 which are far away from the impact area of the tundish are preferentially assembled, the stream 8 and the stream 81 are assembled, the side stream 8 and the side stream 81 are sequentially assembled from outside to inside, and finally the stream 10 and the stream 101 at the central position are closed;
the distance from the continuous casting machine casting blank cutting machine to the crystallizer outlet is 25 meters, the casting blank sizing is required to be 10 meters, the 25/10 result is 2.5 and is not an integer, so that the casting blank needs to be observed, when one of the 71 and 7 flows passes through the cutting machine for 5 meters, the casting blank is stopped, the 71 flows are stopped after the 71 flows reach the flame cutting machine position firstly, and the 7, 8, 81, 9, 91, 10 and 101 flows are closed in sequence by the same method.
And after the pouring is finished, the 101 flows are closed finally, 3 tons of slag are left in the medium-ladle steel, all flows except the 101 flows are successfully assembled, and the 10-flow tail billet is 0.15 m.
Example 3
Referring to fig. 1, the continuous casting machine is an eight-machine eight-strand continuous casting machine, when a tundish is built before casting, the distance between the through hole of the retaining wall of the tundish and the bottom of the impact zone is 10mm, and a fusible baffle of the through hole of the retaining wall of the tundish is increased by 2 mm; the height of the bottom of the impact area is 6mm higher than that of the bottom of the side stream pouring area, and the bottom of the side stream pouring area is 8mm higher than that of the bottom of the central stream pouring area;
before the final molten steel refining of the first furnace comes out, the refiner calculates the casting time of the final furnace according to the casting time, and increases the temperature of the outlet according to the casting stop extension time, and the increasing range is 0.6 ℃/min;
when the final furnace is poured to the middle stage, the integral continuous casting pulling speed is reduced, so that the central stream pulling speed is 0.8m/min, and the side stream pulling speed is 0.7m/min;
when the last furnace is poured to the middle stage, an operator starts to assemble, the side stream 7 and the side stream 71 which are far away from the impact area of the tundish are preferentially assembled, the stream 8 and the stream 81 are assembled, the side stream 8 and the side stream 81 are sequentially assembled from outside to inside, and finally the stream 10 and the stream 101 at the central position are closed;
the distance from the casting blank cutting machine of the continuous casting machine to the outlet of the crystallizer is 25 meters, the casting blank is required to be sized 11 meters, the 25/11 result is an integer of more than 3 meters, and 8 meters are required for sizing 11 meters, so 7 streams and 71 streams are observed during assembly, the 7 stream casting blank head reaches the position of 8 meters behind the flame cutting machine, the stream is stopped, and the streams 71, 8, 81, 9, 91, 10 and 101 are sequentially closed by the same method.
And after the pouring is finished, 10 flows are closed finally, 4 tons of slag are left in the medium-ladle steel, all flows except 101 flows are successfully assembled, and 10 flows are 0.25 m in tail billet.
Claims (4)
1. A process control method for reducing residual steel poured in a multi-machine multi-stream continuous casting tundish is characterized by comprising the following steps of: the control is performed according to the following requirements:
(1) The tundish bottom is of a stepped ladle bottom structure, the height of the impact area ladle bottom is 2-10mm higher than that of the edge flow casting area ladle bottom, and the edge flow casting area ladle bottom is 5-15mm higher than that of the central flow casting area ladle bottom; the impact zone bottom is positioned in the middle of the middle ladle bottom, the central flow casting zone bottom is a left flow bottom and a right flow bottom which are adjacent to the impact zone bottom, and the rest ladle bottoms are side flow casting zone bottoms; retaining walls are arranged on two sides of the bottom of the impact zone, through holes are formed in the retaining walls, the distance between the through holes and the bottom of the impact zone is 8-15mm, and fusible baffles matched with the through holes are arranged in the retaining walls;
(2) When the last furnace of the casting times is cast to the middle stage, reducing the continuous casting drawing speed to ensure that the central flow drawing speed is the lowest drawing speed and the side flow drawing speed is +/-0.1 m/min;
(3) Before the last furnace of molten steel is refined and discharged, calculating the casting time of the last furnace according to the casting time, and raising the discharge temperature according to the temperature drop of the casting stop extension time, wherein the raising temperature range is calculated according to 0.5-1 ℃/min;
(4) When the flow is closed, preferentially closing the side flow far away from the impact area of the tundish, sequentially closing the side flow from outside to inside, and finally closing the central position flow;
(5) Starting assembly in the time period from the middle casting period of the last casting time to the closing of the ladle, sizing according to the casting blank requirement, and stopping casting the side stream which is preferentially processed by the casting blank flame cutting machine to be a whole sized; the assembly method comprises the following steps: assuming that the distance from a casting blank cutting machine to a crystallizer outlet is N meters, the casting blank is required to be fixed in length by N meters, stopping pouring the flow if N/N is an integer, stopping pouring the flow if the result of N/N is a decimal, and stopping pouring the flow when the dimension of the casting blank after passing through the cutting position and the added dimension of the decimal casting blank before cutting are fixed in length.
2. The process control method for reducing residual steel in a multi-machine multi-stream continuous casting tundish according to claim 1, wherein: the continuous casting machine long nozzle corresponding to the impact area bottom corresponds to a central position flow of the continuous casting machine, the central position flow is left and right flows close to the impact area bottom, and the edge flow pouring area bottom corresponds to other flows of the continuous casting machine, which are called edge flows.
3. The process control method for reducing residual steel in a multi-machine multi-stream continuous casting tundish according to claim 1, wherein: the fusible baffle is a low-carbon steel plate with the thickness of 1-3 mm.
4. A process control method for reducing the surplus steel of a multi-machine multi-stream continuous casting tundish according to claim 3, characterized by: the fusible baffle is prefabricated inside the retaining wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311025849.XA CN117139583A (en) | 2023-08-15 | 2023-08-15 | Process control method for reducing residual steel poured in multi-machine multi-flow continuous casting tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311025849.XA CN117139583A (en) | 2023-08-15 | 2023-08-15 | Process control method for reducing residual steel poured in multi-machine multi-flow continuous casting tundish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117139583A true CN117139583A (en) | 2023-12-01 |
Family
ID=88899766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311025849.XA Pending CN117139583A (en) | 2023-08-15 | 2023-08-15 | Process control method for reducing residual steel poured in multi-machine multi-flow continuous casting tundish |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117139583A (en) |
-
2023
- 2023-08-15 CN CN202311025849.XA patent/CN117139583A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206622605U (en) | A kind of three machines three stream slab CC tundish | |
| CN103878334A (en) | Control method for automatic casting of plug-in continuous casting machine | |
| CN108080593A (en) | The method for controlling high pulling rate sheet blank continuous casting level fluctuation | |
| CN101091982A (en) | Method and device for carrying out protected casting for shaped blank continuous casting by using single immersed nozzle | |
| CN101844223B (en) | Structure for preventing continuous casting tundish from producing rotational flows | |
| CN101007340B (en) | Processing method of continuous casting tundish for reducing residual molten steel | |
| US6557623B2 (en) | Production method for continuous casting cast billet | |
| CN117139583A (en) | Process control method for reducing residual steel poured in multi-machine multi-flow continuous casting tundish | |
| CN201329417Y (en) | Multi-port submerged nozzle for sheet billet continuous casting | |
| CN104999044B (en) | A kind of continuous cast mold constant-current stabilizer | |
| CN215315682U (en) | Low-carbon steel tundish structure of slab caster | |
| CN105750534A (en) | IF steel tundish and manufacturing and application methods thereof | |
| JP4725244B2 (en) | Ladle for continuous casting and method for producing slab | |
| CN206253642U (en) | A kind of T-shaped tundish flow control device | |
| CN210139053U (en) | Single tundish structure of eight-strand continuous casting | |
| CN112548055A (en) | Device and method for semi-continuous casting of ultra-wide aluminum alloy slab ingot | |
| SK166399A3 (en) | Method and device for producing slabs | |
| CN102764884B (en) | Straight-through type continuous casting immersion-type water gap | |
| Kimura | Advances in high-purity IF steel manufacturing technology | |
| CN106623879B (en) | A kind of T-type tundish flow control device | |
| CN205437122U (en) | Reduce middle package of IF steel of casting blank inclusion | |
| CN112296293A (en) | Method for changing section in casting of double-flow slab continuous casting machine | |
| CN201603853U (en) | Quadripuntal submersed nozzle used for pouring conventional plate blank and preventing molten steel turbulence | |
| CN117463986B (en) | Method for improving castability of ultra-thick high-carbon steel | |
| CN115319073B (en) | Long-service-life tundish for near-net-shaped ultrathin deformed steel continuous casting and application method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |