CN110788286B - Steel ingot protection pouring device and method thereof - Google Patents
Steel ingot protection pouring device and method thereof Download PDFInfo
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- CN110788286B CN110788286B CN201911266266.XA CN201911266266A CN110788286B CN 110788286 B CN110788286 B CN 110788286B CN 201911266266 A CN201911266266 A CN 201911266266A CN 110788286 B CN110788286 B CN 110788286B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 42
- 239000010959 steel Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 15
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 355
- 229910052786 argon Inorganic materials 0.000 claims abstract description 175
- 238000005266 casting Methods 0.000 claims abstract description 63
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000001301 oxygen Substances 0.000 claims abstract description 53
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 53
- 238000007789 sealing Methods 0.000 claims abstract description 53
- 238000007664 blowing Methods 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims abstract description 41
- 239000007789 gas Substances 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 239000011449 brick Substances 0.000 claims abstract description 14
- 210000000078 claw Anatomy 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 11
- 238000005070 sampling Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 5
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 238000010926 purge Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000002411 adverse Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 238000004512 die casting Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
- B22D1/002—Treatment with gases
-
- 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
- B22D41/50—Pouring-nozzles
- B22D41/58—Pouring-nozzles with gas injecting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D9/00—Machines or plants for casting ingots
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention provides a steel ingot protection pouring device and a method thereof, wherein the steel ingot protection pouring device comprises an argon protection device, an argon blowing device, an oxygen content detection device, a flexible connection device and a middle casting pipe sealing hopper device; the argon protection device is rotationally connected with the ladle nozzle mechanism through the supporting claw, the argon blowing device is connected with the argon protection device through a metal hose, the oxygen content detection device is connected with the argon protection device through a metal hose, the soft connection is fixed on the argon protection device through a hoop, the middle casting pipe sealing funnel device is arranged between a pouring port of a funnel brick and the middle casting pipe, a gap is filled and blocked by using a filling material, the argon protection device descends along with a ladle, is inserted into the middle casting pipe sealing funnel device, and achieves the protection pouring effect under the protection of a full-sealing and double-layer argon gas curtain. According to the invention, the original pouring system is not changed, the soft connection is adopted at the connection part, argon is filled between the protection device and molten steel, the use is safer, and the production is not adversely affected; low cost and is convenient for large-scale popularization and use.
Description
Technical Field
The invention belongs to the technical field of metal materials and processing, and particularly relates to a steel ingot protection pouring device and a method thereof.
Background
Homogenization of steel materials is one of the important targets for materials research, but in steel production, secondary oxidation is always formed to some extent during casting of molten steel due to inclusion. With the continuous improvement of product quality and performance, the quality control of die cast steel is more severe, wherein the casting link is a key in the die casting process, while argon protection is a precondition for ensuring the casting quality, and the secondary oxidation control in the die casting process is one of the difficult problems in the industry all the time.
With the rapid development of secondary refining technology, ultra-high purity molten steel can be smelted at present, but whether the high purity can be perfectly reflected on a finished product or not is also mainly dependent on a die casting technology. In order to prevent serious secondary oxidation generated by casting in the air when molten steel is exposed in the die casting process, argon protection casting technology is adopted at home and abroad.
Protection casting is the only means to mitigate secondary oxidation during ingot casting. To achieve the purpose, metallurgical workers develop a single argon ring protection pouring ring technology, a double argon ring protection pouring technology, a semi-closed argon protection cover protection pouring technology, a telescopic argon protection cover protection pouring technology and the like. The argon ring protection pouring technology is that an argon ring is arranged between a ladle nozzle and the upper edge of a funnel brick to blow argon, and protection pouring is realized through an argon curtain; however, the production site is not completely sealed, and the air current exists, so that an argon curtain is easily damaged to influence the protection pouring; and if the ladle nozzle and the upper opening of the funnel brick cannot be completely centered, the high-temperature molten steel is extremely easy to damage the argon ring, so that the protection casting is ineffective. The semi-closed argon protection cover and the telescopic argon protection cover protection pouring technology is that an argon protection cover is arranged at the position of a ladle nozzle, argon is blown into the argon protection cover, and argon sinks by self weight to form an air curtain to realize protection pouring; however, the lower opening of the argon protection cover is open, the argon density is higher than that of the air, so that the protection effect is influenced by the fact that the air is easily sunk and scattered, for example, the air is easily sucked due to unreasonable argon blowing flow, and the secondary oxidation of molten steel is caused. Therefore, a new solution is urgently needed to solve the above technical problems.
Disclosure of Invention
Aiming at the problems, the invention provides a steel ingot protection pouring device and a steel ingot protection pouring method, the whole design of the device is ingenious, the molten steel between the ladle drain port and the funnel brick is completely sealed in a double-layer manner under the condition that the original pouring system is not changed, the secondary oxidation of the molten steel is further avoided, and the quality of the steel ingot is improved. The control unit controls the argon blowing device to blow argon to the argon protection device, a first layer of exhaust holes on the circular ring blow the argon to the vertical direction of the top opening of the middle casting pipe sealing funnel device, and a second layer of exhaust holes on the circular ring blow the argon to the joint of the soft connection and the top opening of the middle casting pipe sealing funnel device; the control unit controls the oxygen content detection device to detect the oxygen content in the argon protection device, and transmits oxygen information to the control unit, and the control unit adjusts the argon flow of the argon blowing device in real time according to the detection result of the oxygen content detection device, so that the protection pouring effect is enhanced.
The technical scheme adopted for solving the technical problems is as follows: a steel ingot protection pouring device comprises an argon protection device, an argon blowing device, an oxygen content detection device, a soft connection device, a middle casting tube sealing hopper device and a control unit;
the argon protection device is positioned above the middle cast tube sealing hopper device; the argon protection device comprises a cover body and a circular ring; the top of the cover body is provided with a first opening, the bottom of the cover body is provided with a second opening, and the first opening is used for being connected with a ladle nozzle mechanism; the second opening is inserted into the top opening of the middle casting pipe sealing funnel device through soft connection, the bottom opening of the middle casting pipe sealing funnel device is used for being embedded between a pouring gate of a funnel brick and the middle casting pipe, and a gap between the middle casting pipe sealing funnel device and the pouring gate is filled and blocked by filling materials; the circular ring is connected with the top of the cover body; the inside of the circular ring is a cavity, and a double-layer bidirectional exhaust hole is formed in the circular ring along the circumferential direction;
the argon blowing device is connected with the inside of the circular ring, and the argon blowing device enables a first layer of exhaust holes on the circular ring to blow argon to the vertical direction of the top opening of the middle casting pipe sealing funnel device, and a second layer of exhaust holes on the circular ring blow argon to the joint of the soft connection and the top opening of the middle casting pipe sealing funnel device;
the oxygen content detection device is connected with the inside of the argon protection device;
the control unit is respectively connected with the argon blowing device and the oxygen content detection device.
In the above scheme, the first opening is provided with a supporting claw; the first opening is connected with the ladle nozzle mechanism through a supporting claw.
Further, the supporting claw is rotationally clamped with the ladle nozzle mechanism.
In the above scheme, the first opening is an outward expansion type cone opening.
In the scheme, the circular ring is connected with the top of the cover body through the connecting block.
In the above scheme, the argon blowing device comprises an argon blowing adjusting module, an argon drying control module, an argon flow control module and an argon pressure adjusting module;
and the argon purging adjusting module, the argon drying control module, the argon flow control module and the argon pressure adjusting module are respectively connected with the control unit.
In the scheme, the oxygen content detection device comprises a pre-sampler, an electromagnetic valve, a high-precision filter, a sampling pump, a selection valve, a flowmeter, an online oxygen analyzer, a tail gas emptying port and a standard gas port;
the front sampler is connected with the inside of the argon protection device through a metal hose and is also connected with a first pipeline; the first pipeline is sequentially provided with an electromagnetic valve, a high-precision filter, a sampling pump, a selection valve and a standard gas port; the selector valve is also connected with a second pipeline, and the second pipeline is sequentially provided with a flowmeter, an online oxygen analyzer and a tail gas emptying port.
Further, the oxygen content detection device is also connected with a fourth pipeline, and two ends of the fourth pipeline are respectively provided with a pressure reducing valve and a impurity removing valve.
Further, the second pipeline is connected with a third pipeline in parallel, a bypass flowmeter is arranged on the third pipeline, one end of the third pipeline is connected with the first pipeline and is positioned between the sampling pump and the selector valve, and the other end of the third pipeline is connected with the tail gas emptying port.
The control method of the steel ingot protection pouring device comprises the following steps:
the upper end of the argon protection device is connected with a ladle nozzle mechanism, the argon blowing device is connected with the argon protection device, the oxygen content detection device is connected with the argon protection device, the soft connection is arranged on the argon protection device, the middle casting pipe sealing funnel device is arranged between a pouring nozzle of a funnel brick and a middle casting pipe, a gap is filled and blocked by using a filling material, and the argon protection device descends along with a ladle and is inserted into the middle casting pipe sealing funnel device;
the control unit controls the argon blowing device to blow argon to the argon protection device, a first layer of exhaust holes on the circular ring blow the argon to the vertical direction of the top opening of the middle casting pipe sealing funnel device, and a second layer of exhaust holes on the circular ring blow the argon to the joint of the soft connection and the top opening of the middle casting pipe sealing funnel device;
the control unit controls the oxygen content detection device to detect the oxygen content in the argon protection device, transmits oxygen information to the control unit, and controls the monocular to adjust the argon flow of the argon blowing device in real time according to the detection result of the oxygen content detection device.
Compared with the prior art, the invention has the beneficial effects that: under the condition of not changing the original pouring system, the invention carries out complete double-layer sealing on the molten steel between the ladle drain port and the funnel brick, further avoids secondary oxidation of the molten steel, reduces inclusions in the steel ingot, and further improves the quality of the steel ingot; a double-layer bidirectional exhaust hole is arranged on the circular ring along the circumferential direction; the first layer of exhaust holes blow argon to the vertical direction of the top opening of the middle casting pipe sealing funnel device, and the second layer of exhaust holes on the circular ring blow argon to the joint of the soft connection and the top opening of the middle casting pipe sealing funnel device, so that the design sealing effect is good; the invention has the advantages of ingenious overall structural design, convenient installation and convenient inspection and replacement; according to the protection pouring condition, the argon flow is regulated, so that secondary oxidation of molten steel is effectively prevented; the invention has good protection effect and can be used for pouring whole argon protection; according to the invention, the original pouring system is not changed by the protection pouring device, the soft connection is adopted at the connection part, argon is filled between the protection device and molten steel, the use is safer, and the production is not affected; low cost and is convenient for large-scale popularization and use.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic view of the composition and installation of a steel ingot protection pouring device according to an embodiment of the present invention;
FIG. 2 is a side view of an argon shield apparatus in accordance with one embodiment of the present invention;
FIG. 3 is a top view of an argon shield apparatus in accordance with one embodiment of the present invention;
FIG. 4 is an enlarged schematic view of the structure at I in FIG. 3;
FIG. 5 is an argon blowing apparatus of one embodiment of the present invention;
fig. 6 is an oxygen content detection device according to an embodiment of the present invention.
In the figure: 1. a ladle nozzle mechanism; 2. an argon protection device; 201. a cover body; 202. a first opening; 203. a second opening; 204. a supporting claw; 205. a circular ring; 206. a connecting block; 207. a first layer of exhaust holes; 208. a second layer of exhaust holes; 3. argon blowing device; 301. argon purging and adjusting module; 302. an argon drying control module; 303. an argon flow control module; 304. an argon pressure adjusting module; 4. an oxygen content detection device; 5. soft connection; 6. a middle cast tube sealing hopper device; 7. a sprue gate; 8. a filler; 9. middle casting pipe; 10. a front sampler; 11. a trash discharging valve; 12. a pressure reducing valve; 13. an electromagnetic valve; 14. a high-precision filter; 15. a sampling pump; 16. a bypass flow meter; 17. a selection valve; 18. a flow meter; 19. an on-line oxygen analyzer; 20. a tail gas vent; 21. a gas marking port; 22. a first pipeline; 23. a second pipeline; 24. a third pipeline; 25. and a fourth pipeline.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Example 1
Fig. 1 shows a preferred embodiment of the steel ingot protection pouring device according to the present invention, which comprises an argon protection device 2, an argon blowing device 3, an oxygen content detection device 4, a flexible connection 5, a middle casting tube sealing funnel device 6 and a control unit.
The argon protection device 2 is positioned above the middle casting pipe sealing hopper device 6; the argon protection device 2 comprises a cover 201 and a circular ring 205; the top of the cover 201 is provided with a first opening 202, and the bottom is provided with a second opening 203.
The middle casting pipe sealing funnel device 6 is arranged in a funnel shape, and a gap between the middle casting pipe sealing funnel device 6 and the pouring opening 7 is filled and blocked by a filler 8; the manufacturing is convenient, and the funnel brick is convenient to be connected and sealed, so that the lower part is prevented from being opened for air suction, and the protection effect is further enhanced.
The first opening 202 is used for being connected with the ladle nozzle mechanism 1; the second opening 203 is inserted into the top opening of the middle cast tube sealing funnel device 6 through the flexible connection 5, so that the two are convenient to cross-connect, the air suction at the joint is avoided, the protection effect is further enhanced, and the connection is ensured to be free of blocking and easy to seal; the bottom opening of the middle casting pipe sealing funnel device 6 is used for being embedded between a pouring gate 7 of a funnel brick and a middle casting pipe 9, and a gap between the middle casting pipe sealing funnel device 6 and the pouring gate 7 is filled and blocked by a filling material 8.
According to the present embodiment, preferably, the first opening 202 is provided with a supporting claw 204; the first opening 202 is connected with the ladle nozzle mechanism 1 through a supporting claw 204. Preferably, the supporting claw 204 is rotationally clamped with the ladle nozzle mechanism 1.
According to this embodiment, preferably, the first opening 202 is an outward expansion cone opening, and a gasket is disposed at the connection with the ladle nozzle mechanism 1, so that the manufacturing is convenient, the connection and sealing with the ladle nozzle are facilitated, the air suction at the connection is avoided, and the protection effect is further enhanced.
As shown in fig. 2, the ring 205 is connected to the top of the cover 201 through a connection block 206.
As shown in fig. 3 and 4, the inside of the ring 205 is a cavity, and a double-layer bi-directional vent hole is provided on the ring 205 along the circumferential direction, including a first layer vent hole 207 and a second layer vent hole 208. The argon blowing device 3 is connected with the circular ring 205 through a metal hose, the argon blowing device 3 enables the first layer of exhaust holes 207 on the circular ring 205 to blow argon to the vertical direction of the top opening of the middle casting tube sealing funnel device 6, the second layer of exhaust holes 208 on the circular ring 205 blow argon to the connection part of the soft connection 5 and the top opening of the middle casting tube sealing funnel device 6, the bidirectional double-layer annular argon curtain protection is realized, the manufacture is convenient, the more effective air isolation is convenient, and the protection effect is further enhanced.
According to this embodiment, the flexible connection 5 is preferably fixed to the second opening 203 of the argon protection device 2 by a hoop.
The argon protection device 2 descends along with the steel ladle and is inserted into the middle casting pipe sealing funnel device 6.
As shown in FIG. 5, the argon blowing device is a multifunctional argon blowing device, and is provided with an argon blowing adjusting device, an argon drying control device, an argon flow control device and an argon pressure adjusting device, so that the pipeline can be effectively prevented from being blocked, and the protection effect is further enhanced. The argon blowing device can adjust the argon flow in real time according to the protection effect, can effectively isolate air, ensures that the molten steel pouring process does not contact with air, and further enhances the protection pouring effect.
As shown in fig. 6, the oxygen content detection device 4 comprises a pre-sampler 10, a solenoid valve 13, a high-precision filter 14, a sampling pump 15, a selection valve 17, a flowmeter 18, an online oxygen analyzer 19, an exhaust vent 20 and a standard gas port 21; the pre-sampler 10 is connected with the inside of the argon protection device 2 through a metal hose, and the pre-sampler 10 is also connected with a first pipeline 22; the first pipeline 22 is sequentially provided with an electromagnetic valve 13, a high-precision filter 14, a sampling pump 15, a selection valve 17 and a standard gas port 21; the selector valve 17 is also connected with a second pipeline 23, and the second pipeline 23 is sequentially provided with a flowmeter 18, an online oxygen analyzer 19 and a tail gas emptying port 20.
According to this embodiment, preferably, the oxygen content detecting device 4 is further connected to a fourth pipeline 25, and two ends on the fourth pipeline 25 are respectively provided with a pressure reducing valve 12 and a impurity removing valve 11. The fourth pipeline 25 is a blowback pipeline, and is used for removing impurities when the pipeline is blocked.
According to this embodiment, preferably, the second pipeline 23 is connected in parallel with a third pipeline 24, the third pipeline 24 is provided with a bypass flowmeter 16, one end of the third pipeline 24 is connected with the first pipeline 22 and is located between the sampling pump 15 and the selector valve 17, and the other end of the third pipeline 24 is connected with the exhaust gas vent 20.
The oxygen content detection device 4 is connected with the argon protection device 2 through a metal hose, runs in a whole-process micro-negative pressure state, has the functions of detecting gas impurity removal, high-precision filtration, online accurate analysis and the like, and can reflect the protection effect in real time so as to adjust the argon flow in time, thereby enhancing the protection pouring effect.
The control unit is respectively connected with the argon blowing device 3 and the oxygen content detection device 4; the control unit controls the argon blowing device 3 to blow argon to the argon protection device 2; the control unit controls the oxygen content detection device 4 to detect the oxygen content in the argon protection device 2, and transmits oxygen information to the control unit, and the control unit adjusts the argon flow of the argon blowing device 3 in real time according to the detection result of the oxygen content detection device 4.
The working principle of the device is as follows:
according to the invention, the argon protection device 2 is rotatably connected with the ladle nozzle mechanism 1 through the supporting claw 204, the argon blowing device 3 is connected with the argon protection device 2 through a metal hose, the oxygen content detection device 4 is connected with the argon protection device 2 through a metal hose, the soft connection 5 is fixed on the argon protection device 2 through a hoop, the middle casting pipe sealing funnel device 6 is arranged between a pouring opening 7 of a funnel brick and a middle casting pipe 9, a gap is filled and blocked by using a filling material 8, the argon protection device 2 descends along with a ladle and is inserted into the middle casting pipe sealing funnel device 6, and a protection pouring effect is realized under the protection of a full-sealing and double-layer argon curtain.
Before the steel ladle arrives at the station, a middle casting pipe sealing funnel device 6 is arranged between a pouring gate 7 of a funnel brick and a middle casting pipe 9, a gap is filled and blocked by using a filling material 8, and meanwhile, a soft connection 5 is fixed on an argon protection device 2 through a hoop; after the steel ladle arrives at the station, the argon protection device 2 is connected with the steel ladle water gap mechanism 1 through the supporting claw 204, then the argon blowing device 3 is connected with the argon protection device 2 through a metal hose, and the oxygen content detection device 4 is connected with the argon protection device 2 through the metal hose; after reaching the pouring position, the argon protection device 2 is lowered and inserted into the middle casting pipe sealing hopper device 6 through the lifting function of the pouring truck, the argon blowing device 3 and the oxygen content detection device 4 are opened, and the argon flow of the argon blowing device 3 is regulated in real time according to the detection result of the oxygen content detection device 4 so as to ensure the protection pouring effect.
Example 2
The control method of the steel ingot protection pouring device according to the embodiment is performed based on the steel ingot protection pouring device according to embodiment 1, so that the control method has the beneficial effects of embodiment 1 and is not described herein.
The control method of the steel ingot protection pouring device comprises the following steps:
the upper end of the argon protection device 2 is connected with a ladle nozzle mechanism 1, the argon blowing device 3 is connected with the argon protection device 2, the oxygen content detection device 4 is connected with the argon protection device 2, the soft connection 5 is arranged on the argon protection device 2, the middle casting pipe sealing funnel device 6 is arranged between a pouring nozzle 7 of a funnel brick and a middle casting pipe 9, a gap is filled and blocked by using a filling material 8, and the argon protection device 2 descends along with a ladle and is inserted into the middle casting pipe sealing funnel device 6;
the control unit controls the argon blowing device 3 to blow argon to the argon protection device 2, a first layer of exhaust holes 207 on the circular ring 205 blow the argon to the vertical direction of the top opening of the middle casting pipe sealing funnel device 6, and a second layer of exhaust holes 208 on the circular ring 205 blow the argon to the connection part of the soft connection 5 and the top opening of the middle casting pipe sealing funnel device 6;
the control unit controls the oxygen content detection device 4 to detect the oxygen content in the argon protection device 2, and transmits oxygen information to the control unit, and the control unit adjusts the argon flow of the argon blowing device 3 in real time according to the detection result of the oxygen content detection device 4.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.
Claims (7)
1. The steel ingot protection pouring device is characterized by comprising an argon protection device (2), an argon blowing device (3), an oxygen content detection device (4), a flexible connection (5), a middle casting tube sealing funnel device (6) and a control unit;
the argon protection device (2) is positioned above the middle casting pipe sealing hopper device (6); the argon protection device (2) comprises a cover body (201) and a circular ring (205); the top of the cover body (201) is provided with a first opening (202), the bottom of the cover body is provided with a second opening (203), and the first opening (202) is used for being connected with a ladle nozzle mechanism (1); the second opening (203) is inserted into the top opening of the middle casting pipe sealing funnel device (6) through the flexible connection (5), the bottom opening of the middle casting pipe sealing funnel device (6) is used for being embedded between a pouring opening (7) of a funnel brick and a middle casting pipe (9), and a gap between the middle casting pipe sealing funnel device (6) and the pouring opening (7) is filled and blocked by a filling material (8); the circular ring (205) is connected with the top of the cover body (201); the inside of the circular ring (205) is a cavity, and a double-layer bidirectional exhaust hole is formed in the circular ring (205) along the circumferential direction;
the argon blowing device (3) is connected with the inside of the circular ring (205), the argon blowing device (3) enables a first layer of exhaust holes (207) on the circular ring (205) to blow argon to the vertical direction of the top opening of the middle casting pipe sealing funnel device (6), and a second layer of exhaust holes (208) on the circular ring (205) blows argon to the connection part of the soft connection (5) and the top opening of the middle casting pipe sealing funnel device (6);
the oxygen content detection device (4) is connected with the inside of the argon protection device (2); the oxygen content detection device (4) comprises a pre-sampler (10), an electromagnetic valve (13), a high-precision filter (14), a sampling pump (15), a selection valve (17), a flowmeter (18), an online oxygen analyzer (19), a tail gas emptying port (20) and a standard gas port (21);
the pre-sampler (10) is connected with the inside of the argon protection device (2) through a metal hose, and the pre-sampler (10) is also connected with a first pipeline (22); the first pipeline (22) is sequentially provided with an electromagnetic valve (13), a high-precision filter (14), a sampling pump (15), a selection valve (17) and a standard gas port (21); the selection valve (17) is also connected with a second pipeline (23), and the second pipeline (23) is sequentially provided with a flowmeter (18), an online oxygen analyzer (19) and a tail gas emptying port (20);
the control unit is respectively connected with the argon blowing device (3) and the oxygen content detection device (4);
the first opening (202) is provided with a supporting claw (204); the first opening (202) is connected with the ladle nozzle mechanism (1) through a supporting claw (204);
the first opening (202) is an external expansion type cone opening.
2. The steel ingot protection pouring device according to claim 1, wherein the supporting claw (204) is rotationally clamped with the ladle nozzle mechanism (1).
3. The ingot protection pouring device according to claim 1, characterized in that the ring (205) is connected to the top of the casing (201) by means of a connection block (206).
4. The steel ingot protection pouring device according to claim 1, wherein the argon blowing device (3) comprises an argon blowing adjustment module (301), an argon drying control module (302), an argon flow control module (303) and an argon pressure adjustment module (304);
the argon purging adjusting module (301), the argon drying control module (302), the argon flow control module (303) and the argon pressure adjusting module (304) are respectively connected with the control unit.
5. The steel ingot protection pouring device according to claim 1, wherein the oxygen content detection device (4) is further connected with a fourth pipeline (25), and both ends on the fourth pipeline (25) are respectively provided with a pressure reducing valve (12) and a impurity discharging valve (11).
6. The steel ingot protection pouring device according to claim 1, wherein the second pipeline (23) is connected with a third pipeline (24) in parallel, a bypass flowmeter (16) is arranged on the third pipeline (24), one end of the third pipeline (24) is connected with the first pipeline (22) and is positioned between the sampling pump (15) and the selector valve (17), and the other end of the third pipeline (24) is connected with the tail gas emptying port (20).
7. A control method of a steel ingot protection pouring device according to any one of claims 1 to 6, characterized by comprising the steps of:
the upper end of the argon protection device (2) is connected with a ladle nozzle mechanism (1), the argon blowing device (3) is connected with the argon protection device (2), the oxygen content detection device (4) is connected with the argon protection device (2), the soft connection (5) is arranged on the argon protection device (2), the middle casting pipe sealing funnel device (6) is arranged between a pouring port (7) of a funnel brick and a middle casting pipe (9), a gap is filled and blocked by using a filling material (8), and the argon protection device (2) descends along with a ladle and is inserted into the middle casting pipe sealing funnel device (6);
the control unit controls the argon blowing device (3) to blow argon to the argon protection device (2), a first layer of exhaust holes (207) on the circular ring (205) blow the argon to the vertical direction of the top opening of the middle casting pipe sealing funnel device (6), and a second layer of exhaust holes (208) on the circular ring (205) blow the argon to the connection part of the soft connection (5) and the top opening of the middle casting pipe sealing funnel device (6);
the control unit controls the oxygen content detection device (4) to detect the oxygen content in the argon protection device (2), and transmits oxygen information to the control unit, and the control unit adjusts the argon flow of the argon blowing device (3) in real time according to the detection result of the oxygen content detection device (4).
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| CN112157253B (en) * | 2020-09-25 | 2022-02-01 | 三明学院 | Whole-process non-oxidation protection casting device and casting method |
| CN113953470B (en) * | 2021-10-28 | 2023-02-03 | 江苏永钢集团有限公司 | Argon protection device for steel ingot pouring |
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