CN115537503B - Automatic argon blowing system and method for steel ladle - Google Patents
Automatic argon blowing system and method for steel ladle Download PDFInfo
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- CN115537503B CN115537503B CN202211270720.0A CN202211270720A CN115537503B CN 115537503 B CN115537503 B CN 115537503B CN 202211270720 A CN202211270720 A CN 202211270720A CN 115537503 B CN115537503 B CN 115537503B
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- argon
- molten steel
- ladle
- argon blowing
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 title claims abstract description 454
- 229910052786 argon Inorganic materials 0.000 title claims abstract description 227
- 238000007664 blowing Methods 0.000 title claims abstract description 153
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 148
- 239000010959 steel Substances 0.000 title claims abstract description 148
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000007670 refining Methods 0.000 claims abstract description 88
- 238000010079 rubber tapping Methods 0.000 claims abstract description 45
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 23
- 239000000956 alloy Substances 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 12
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000009628 steelmaking Methods 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4673—Measuring and sampling devices
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention provides a system and a method for automatically blowing argon from a steel ladle, and relates to the technical field of steelmaking, wherein the system comprises a steel ladle, an argon pipeline and an argon blowing control module, wherein the argon blowing control module is electrically connected with a CAS refined alloy feeding module, a CAS scrap steel feeding module and a converter rocking angle module; according to the invention, the tapping position signal of the molten steel car is detected, the shaking angle of the converter 15 is detected, the refining position signal of the molten steel car is detected, the refining addition signal of the CAS is detected, the scrap adding signal of the CAS is detected, and the separation signal of the molten steel car from the refining position is detected to control argon blowing and stopping, so that the whole process is automatically controlled, and the operation intensity of personnel can be effectively reduced.
Description
Technical Field
The invention relates to the technical field of steelmaking, in particular to a system and a method for automatically blowing argon into a steel ladle.
Background
Argon blowing of a steel ladle: the primary molten steel of the converter is tapped into a ladle from the beginning, molten steel is stirred by argon bottom blowing of the ladle to be quickly mixed with the added alloy for deoxidization alloying, the molten steel enters a CAS for secondary refining after tapping, and the alloy added in the CAS refining step and the waste steel for temperature adjustment are stirred and uniformly mixed by the argon bottom blowing of the ladle in the secondary refining process, so that inclusions in the steel are removed by floating up, and the molten steel with quality meeting continuous casting requirements is obtained;
The existing ladle argon blowing control generally adopts a manual adjustment method and other automatic argon blowing methods, and the manual adjustment of argon has the following problems: 1. the manual adjustment of argon needs to be tracked and adjusted by workers in the whole course from the tapping of the converter to the completion of CAS refining, so that the working intensity is high; 2. the condition that argon is not timely regulated by workers in the control of argon in different periods causes the excessive or insufficient argon blowing intensity, so that the added materials such as alloy, scrap steel and the like are uneven, inclusions are not effectively removed, argon resources are wasted and the like;
Other automatic argon blowing methods have the problems: patent application CN111679622a discloses a device and a method for regulating and controlling the flow of argon blown from the bottom of a ladle, the scheme obtains an image of the surface of molten steel after argon blown from the bottom of the ladle through a visual sensor, the image processing unit obtains a molten steel ratio after processing, the image processing unit transmits the molten steel ratio to a ladle bottom argon blowing valve opening control unit, the ladle bottom argon blowing valve opening control unit calculates a new ladle bottom argon blowing valve opening value according to the molten steel ratio, a target value and a target range, and transmits the new ladle bottom argon blowing valve opening value to a ladle bottom argon blowing valve opening control PLC to control the opening of the ladle bottom argon blowing valve, thereby forming closed loop control of the flow of argon blown from the bottom of the ladle, however, the mode of image acquisition and analysis processing has a plurality of interference factors of field operation environments, and the acquired image is possibly distorted due to ladle cooling and argon blowing, so that the control cannot be precisely controlled;
Patent application CN112410510a discloses a method for automatically controlling ladle argon blowing, the problem of the scheme is mainly that argon blowing parameters are adjusted according to temperature conditions, argon is increased when high temperature is met, temperature is reduced when low temperature is met, too small argon blowing parameters can cause uneven materials added in alloy, scrap steel and the like, too large or too small argon blowing parameters can cause problems of secondary oxidation of molten steel, argon consumption increase, inclusion increase and the like, and the problems of argon cost control and molten steel quality control are unfavorable, therefore, the invention provides a ladle automatic argon blowing system and a ladle automatic argon blowing method to solve the problems in the prior art.
Disclosure of Invention
In order to solve the problems, the invention provides a system and a method for automatically blowing argon from a steel ladle, and the system and the method for automatically blowing the argon from the steel ladle are automatically controlled in the whole process, so that the operation intensity of personnel can be effectively reduced.
In order to achieve the purpose of the invention, the invention is realized by the following technical scheme: the automatic argon blowing system for the steel ladle comprises a steel ladle, an argon pipeline and an argon blowing control module, wherein the argon blowing control module is electrically connected with a CAS refined alloy feeding module, a CAS scrap steel feeding module and a converter rocking angle module, the steel ladle is arranged on a processing station, two ends of the processing station are respectively provided with a molten steel car at a CAS refined position signal module and a molten steel car at a tapping position signal module, and the molten steel car at the CAS refined position signal module and the molten steel car at the tapping position signal module are electrically connected with the argon blowing control module;
The argon gas pipeline is communicated with the steel ladle, the argon gas pipeline is provided with a cut-off valve and a pressure gauge, the positions of the two ends of the cut-off valve are communicated with a shunt pipeline, the shunt pipeline is provided with a first digital cut-off valve, a digital flow valve and a flowmeter, one end of the argon gas pipeline is communicated with an exhaust pipe, the exhaust pipe is provided with a second digital cut-off valve, and the cut-off valve, the pressure gauge, the first digital cut-off valve, the digital flow valve, the flowmeter and the second digital cut-off valve are electrically connected with the argon blowing control module.
The further improvement is that: the converter shaking angle module is used for sending a shaking angle value of the converter to the argon blowing control module in real time, and the molten steel car tapping position signal module is used for sending a signal of the molten steel car tapping position to the argon blowing control module.
The further improvement is that: and the argon blowing control module is used for receiving the value of the shaking angle of the converter shaking angle module and the tapping position signal of the molten steel car in the tapping position signal module at the tapping beginning stage, and when the shaking angle of the converter reaches a set value A, the argon pipeline performs strong argon blowing on the ladle, and the flow is 100-120 m 3/h.
The further improvement is that: and the argon blowing control module is used for receiving the value of the shaking angle of the converter shaking angle module and the tapping position signal of the molten steel car in the tapping position signal module in the tapping process, and when the shaking angle of the converter is smaller than a set value A, the argon pipeline is used for moderately blowing argon into the steel ladle, and the flow is 30-45 m 3/h.
The further improvement is that: the molten steel car is in the signal module of the CAS refining position and is used for sending a signal of the molten steel car in the CAS refining position to the argon blowing control module, the argon blowing control module is used for receiving the signal of the molten steel car in the CAS refining position after the molten steel car is transported to the CAS refining position, and the argon pipeline is used for carrying out soft argon blowing on the steel ladle, wherein the flow is 15-25 m 3/h.
The further improvement is that: and the argon blowing control module receives a molten steel car signal of the molten steel car in the CAS refining position signal module in a CAS refining position and a refining adding alloy signal of the CAS refining alloy feeding module in a CAS refining stage, when the alloy is added, an argon pipeline turns a ladle into medium argon blowing for T minutes, the flow is 30-45 m 3/h, then the argon pipeline turns the ladle into soft argon blowing, and the flow is 15-25 m 3/h.
The further improvement is that: and the argon blowing control module receives a molten steel car refining position signal of the molten steel car in the CAS refining position signal module and a refining scrap adding signal of the CAS scrap adding module in a CAS refining stage, when scrap is added, the argon pipeline turns the ladle into medium argon blowing for T minutes, the flow is 30-45 m 3/h, and then the argon pipeline turns the ladle into soft argon blowing, and the flow is 15-25 m 3/h.
The further improvement is that: and the argon blowing control module is used for receiving a molten steel car disconnection signal of the molten steel car at the CAS refining position signal module after the molten steel car is transported away from the CAS refining position, and the argon pipeline stops blowing argon to the steel ladle.
The further improvement is that: after the argon pipeline stops blowing argon to the steel ladle, the argon blowing control module controls the second digital cut-off valve for exhausting to be opened for N seconds and then to be automatically closed.
A method for automatically blowing argon into a ladle, which comprises the following steps:
S1: detecting a tapping position signal of a molten steel car, and when the tilting angle of the swinging angle of the converter is larger than a set value A, starting to strongly blow argon to the ladle, wherein the flow is controlled to be 100-120 m 3/h;
S2: when detecting that the tilting angle of the converter rocking angle is less than the set value A, the ladle starts to be turned into medium argon blowing, and the flow is controlled to be 30-45 m 3/h;
S3: detecting a signal of a molten steel car at a CAS refining position, and starting to convert a ladle into soft argon blowing, wherein the flow is controlled to be 15-25 m 3/h;
S4: detecting a CAS refining alloy signal at a CAS refining position by a molten steel car, starting to turn into medium argon blowing Tmin by a ladle, and automatically turning into soft argon blowing;
S5: the molten steel car detects a signal of adding scrap steel in CAS refining at a CAS refining position, and the ladle starts to be changed into medium argon blowing Tmin and then is automatically changed into soft argon blowing;
S6: detecting that the molten steel vehicle leaves the refining position signal, stopping argon blowing by the steel ladle, and opening a second digital cut-off valve to diffuse residual argon in the pipeline.
The beneficial effects of the invention are as follows:
1. According to the invention, the tapping position signal of the molten steel car is detected, the shaking angle of the converter 15 is detected, the refining position signal of the molten steel car is detected, the refining addition signal of the CAS is detected, the scrap adding signal of the CAS is detected, and the separation signal of the molten steel car from the refining position is detected to control argon blowing and stopping, so that the whole process is automatically controlled, and the operation intensity of personnel can be effectively reduced.
2. According to the invention, argon blowing parameters such as flow and the like are adjusted according to process requirements, and strong argon blowing, medium argon blowing or soft argon blowing are carried out, so that the automatic control of argon in different periods is realized, the functions of uniform components, uniform temperature, inclusion removal and the like are all stably realized, the procedure is simple, and the manufacturing cost is low.
Drawings
Fig. 1 is a front view of the present invention.
Wherein: 1. ladle; 2. an argon pipeline; 3. argon blowing control module; 4. a CAS refining alloy charging module; 5. CAS scrap steel charging module; 6. a converter rocking angle module; 7. the molten steel car is arranged on the CAS refining position signal module; 8. the molten steel car is at the tapping position signal module; 9. a shut-off valve; 10. a pressure gauge; 11. a first digital shut-off valve; 12. a digital flow valve; 13. a flow meter; 14. a second digital cut-off valve; 15. a converter.
Detailed Description
The present invention will be further described in detail with reference to the following examples, which are only for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Example 1
According to the embodiment shown in fig. 1, the system for automatically blowing argon from a ladle comprises a ladle 1, an argon pipeline 2 and an argon blowing control module 3, wherein the argon blowing control module 3 is electrically connected with a CAS refined alloy feeding module 4, a CAS scrap steel feeding module 5 and a converter rocking angle module 6, the ladle 1 is arranged on a processing station, two ends of the processing station are respectively provided with a molten steel car at a CAS refined position signal module 7 and a molten steel car at a tapping position signal module 8, and the molten steel car at the CAS refined position signal module 7, the molten steel car at the tapping position signal module 8 and the argon blowing control module 3 are electrically connected;
The argon gas pipeline 2 is communicated with the steel ladle 1, the argon gas pipeline 2 is provided with a cut-off valve 9 and a pressure gauge 10, the positions of two ends of the cut-off valve 9 are communicated with a shunt pipeline on the argon gas pipeline 2, the shunt pipeline is provided with a first digital cut-off valve 11, a digital flow valve 12 and a flowmeter 13, one end of the argon gas pipeline 2 is communicated with an exhaust pipe, the exhaust pipe is provided with a second digital cut-off valve 14, and the cut-off valve 9, the pressure gauge 10, the first digital cut-off valve 11, the digital flow valve 12, the flowmeter 13 and the second digital cut-off valve 14 are electrically connected with the argon blowing control module 3.
The converter shaking angle module 6 is used for sending a shaking angle value of a converter 15 to the argon blowing control module 3 in real time, and the molten steel car tapping position signal module 8 is used for sending a signal of the molten steel car tapping position to the argon blowing control module 3. The argon blowing control module 3 is used for receiving the value of the shaking angle of the converter shaking angle module 6 and the tapping position signal of the molten steel car in the tapping position signal module 8 at the tapping beginning stage, and when the shaking angle of the converter reaches the set value A, the argon pipeline 2 carries out strong argon blowing on the ladle 1, and the flow is 100-120 m 3/h. And the argon blowing control module 3 is used for receiving the value of the shaking angle of the converter shaking angle module 6 and the tapping position signal of the molten steel car in the tapping position signal module 8 in the tapping process, and when the shaking angle of the converter is smaller than a set value A, the argon pipeline 2 is used for moderately blowing argon into the ladle 1, and the flow is 30-45 m 3/h. The molten steel car is at CAS refining position signal module 7 is used for sending the signal of molten steel car at CAS refining position to argon blowing control module 3, argon blowing control module 3 is used for receiving the molten steel car at CAS refining position signal of molten steel car at CAS refining position signal module 7 after molten steel car transportation to CAS refining position, argon pipeline 2 carries out soft argon blowing to ladle 1, and the flow is 15 ~ 25m 3/h. And the argon blowing control module 3 receives a molten steel car signal of the molten steel car in the CAS refining position signal module 7 in the CAS refining position and a refining adding alloy signal of the CAS refining alloy feeding module 4 in the CAS refining stage, when the alloy is added, the argon pipeline 2 turns into medium argon blowing T minutes for the ladle 1, the flow is 30-45 m 3/h, and then the argon pipeline 2 turns into soft argon blowing for the ladle 1, and the flow is 15-25 m 3/h. And the argon blowing control module 3 receives a molten steel car refining position signal of the molten steel car in the CAS refining position signal module 7 and a refining adding scrap steel signal of the CAS scrap steel feeding module 5 in a CAS refining stage, when scrap steel is added, the argon pipeline 2 turns into medium argon blowing T minutes for the ladle 1, the flow rate is 30-45 m 3/h, and then the argon pipeline 2 turns into soft argon blowing for the ladle 1, and the flow rate is 15-25 m 3/h. After the molten steel car is transported away from the CAS refining position, the argon blowing control module 3 is used for receiving a molten steel car disconnection signal of the molten steel car at the CAS refining position signal module 7, and the argon pipeline 2 stops blowing argon to the ladle 1. After the argon pipeline 2 stops blowing argon to the ladle 1, the argon blowing control module 3 controls the second digital cut-off valve 14 for exhausting to be opened for N seconds, and then the second digital cut-off valve is automatically closed.
The method comprises the following steps: the argon blowing control module 3 is used for receiving the value of the shaking angle of the converter shaking angle module 6 and the signal of the molten steel car at the tapping position signal module 8 at the tapping beginning stage of tapping, when the shaking angle of the converter reaches a set value, the argon blowing control module 3 starts to control the first digital cut-off valve 11 on the argon pipeline 2 to be opened, and controls the digital flow valve 12 to control the argon blowing flow of the steel ladle at 115m 3/h. When the converter shaking angle is smaller than 70 degrees in the tapping process, the argon blowing control module 3 controls the digital flow valve 12 to adjust the argon blowing flow of the ladle to 35m 3/h. When the molten steel car is transported to the molten steel car at the CAS refining position signal module 7 after tapping, the molten steel car transmits a signal to the argon blowing control module 3, and the argon blowing control module 3 controls the digital flow valve 12 to adjust the argon blowing flow of the ladle to 18m 3/h. When the molten steel ladle car is at the CAS refining position, the CAS refining alloy feeding module 4 transmits an alloy feeding signal to the argon blowing control module 3, the argon blowing control module 3 controls the digital flow valve 12 to adjust the argon blowing flow of the ladle to 18m 3/h for 1 minute, and then the flow is adjusted to 35m 3/h. The CAS scrap steel feeding module 5 transmits a scrap steel feeding signal to the argon blowing control module 3, the argon blowing control module 3 controls the digital flow valve 12 to adjust the argon blowing flow of the steel ladle to 18m 3/h for 1 minute, and then the flow is adjusted to 35m 3/h. When the CAS refining is finished, after the molten steel car is transported away from the CAS refining position, a signal of the molten steel car is transmitted to the argon blowing control module 3 in the CAS refining position signal module 7, and the argon blowing control module 3 controls the first digital cut-off valve 11 of the argon pipeline 2 to be closed, so that argon blowing is stopped. The argon blowing control module 3 controls the second digital cut-off valve 14 for discharging to be opened for 20 seconds, discharges the residual argon in the pipeline, and then is automatically closed.
The converter rocking angle module 6 is a rocking angle PLC controller, the molten steel car is connected to the PLC through a photoelectric switch at the tapping position signal module 8, the argon blowing control module 3 is an argon blowing PLC controller, the molten steel car is connected to the PLC through a photoelectric switch at the CAS refining position signal module 7, the CAS refined alloy feeding module 4 is an alloy feeding PLC controller, and the CAS scrap feeding module 5 is a scrap feeding PLC controller. The argon pipeline 2 is connected with an argon source and the ladle 1. The shut-off valve 9, the pressure gauge 10, the first digital shut-off valve 11, the digital flow valve 12, the flowmeter 13 and the second digital shut-off valve 14 are various valves arranged on the argon pipeline 2, or are controlled by the argon blowing control module 3 singly or in combination to realize different control actions. The shut-off valve 9 is used for shutting off the main passage of the argon pipeline 2, so that argon flows from the shunt pipeline, the flow is controlled, one end of the inlet of the second digital shut-off valve 14 is connected with the argon pipeline 2, and one end of the outlet is not connected, so that the discharge of a small amount of argon left in the pipeline is realized.
Example two
According to the embodiment shown in fig. 1, a method for automatically blowing argon into a ladle is provided, which comprises the following steps:
S1: detecting a tapping position signal of a molten steel car, and when the tilting angle of the shaking angle of the converter 15 is larger than a set value of 70 degrees, starting to strongly blow argon to the ladle 1, wherein the flow is controlled to be 100-120 m 3/h;
S2: when detecting that the tilting angle of the rocking angle of the converter 15 is less than the set value of 70 DEG, the ladle 1 starts to turn into medium argon blowing, and the flow is controlled to be 30-45 m 3/h;
s3: detecting a signal of a molten steel car at a CAS refining position, and starting to convert the ladle 1 into soft argon blowing, wherein the flow is controlled to be 15-25 m 3/h;
S4: detecting a CAS refining alloy signal at a CAS refining position by the molten steel car, turning the ladle 1 into medium argon blowing for 1min, and automatically turning into soft argon blowing;
S5: the molten steel car detects a signal of adding scrap steel in CAS refining at a CAS refining position, and the ladle 1 starts to blow argon for 1min in a medium mode and then automatically changes into soft argon blowing;
s6: detecting that the molten steel car leaves the refining position signal, stopping argon blowing by the ladle 1, and opening the second digital cut-off valve 14 to diffuse residual argon in the pipeline.
According to the invention, the tapping position signal of the molten steel car is detected, the shaking angle of the converter 15 is detected, the refining position signal of the molten steel car is detected, the refining addition signal of the CAS is detected, the scrap adding signal of the CAS is detected, and the separation signal of the molten steel car from the refining position is detected to control argon blowing and stopping, so that the whole process is automatically controlled, and the operation intensity of personnel can be effectively reduced. According to the invention, argon blowing parameters such as flow and the like are adjusted according to process requirements, and strong argon blowing, medium argon blowing or soft argon blowing are performed, so that automatic control of argon in different periods is realized, and all functions such as uniform components, uniform temperature, inclusion removal and the like are ensured to be realized stably, so that the process is simple, and the cost is low.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. The utility model provides an automatic argon blowing's of ladle system, includes ladle (1), argon gas pipeline (2) and blows argon control module (3), its characterized in that: the steel ladle (1) is arranged on a processing station, two ends of the processing station are respectively provided with a molten steel car at a CAS refining position signal module (7) and a molten steel car at a tapping position signal module (8), and the molten steel car at the CAS refining position signal module (7), the molten steel car at the tapping position signal module (8) are electrically connected with the argon blowing control module (3);
The argon gas pipeline (2) is communicated with the steel ladle (1), a cut-off valve (9) and a pressure gauge (10) are arranged on the argon gas pipeline (2), a shunt pipeline is communicated with the argon gas pipeline (2) at the positions of two ends of the cut-off valve (9), a first digital cut-off valve (11), a digital flow valve (12) and a flowmeter (13) are arranged on the shunt pipeline, one end of the argon gas pipeline (2) is communicated with an exhaust pipe, a second digital cut-off valve (14) is arranged on the exhaust pipe, and the cut-off valve (9), the pressure gauge (10), the first digital cut-off valve (11), the digital flow valve (12), the flowmeter (13) and the second digital cut-off valve (14) are electrically connected with the argon blowing control module (3);
The converter shaking angle module (6) is used for sending a shaking angle value of the converter (15) to the argon blowing control module (3) in real time, and the molten steel car tapping position signal module (8) is used for sending a signal of the molten steel car tapping position to the argon blowing control module (3);
The argon blowing control module (3) is used for receiving a swinging angle value of the converter swinging angle module (6) and a tapping position signal of the molten steel car in the tapping position signal module (8) at a tapping beginning stage, and when the swinging angle of the converter reaches a set value A, the argon pipeline (2) carries out strong argon blowing on the ladle (1), and the flow is 100-120 m/h;
The argon blowing control module (3) is used for receiving a shaking angle value of the converter shaking angle module (6) and a tapping position signal of the molten steel car in the tapping position signal module (8) in the tapping process, and when the shaking angle of the converter is smaller than a set value A, the argon pipeline (2) is used for moderately blowing argon into the ladle (1), and the flow is 30-45 m/h;
The molten steel car at the CAS refining position signal module (7) is used for sending a signal of the molten steel car at the CAS refining position to the argon blowing control module (3), the argon blowing control module (3) is used for receiving the signal of the molten steel car at the CAS refining position signal module (7) after the molten steel car is transported to the CAS refining position, the argon pipeline (2) carries out soft argon blowing on the ladle (1), and the flow is 15-25 m/h;
the method for automatically blowing argon into the steel ladle comprises the following steps:
S1: detecting a tapping position signal of a molten steel car, and when the tilting angle of the swinging furnace angle of the converter (15) is larger than a set value A, starting to strongly blow argon to the ladle (1), wherein the flow is controlled to be 100-120 m/h;
s2: when detecting that the tilting angle of the swinging angle of the converter (15) is smaller than the set value A, the ladle (1) starts to turn into medium argon blowing, and the flow is controlled to be 30-45 m/h;
S3: detecting a signal of a molten steel car at a CAS refining position, and starting to convert the ladle (1) into soft argon blowing, wherein the flow is controlled to be 15-25 m/h;
S4: the molten steel car detects a CAS refining alloy signal at a CAS refining position, and the ladle (1) starts to turn into medium argon blowing Tmin and then automatically turns into soft argon blowing; the argon blowing control module (3) receives a molten steel car in a CAS refining position signal of the molten steel car in a CAS refining position signal module (7) and a refining adding alloy signal of the CAS refining alloy feeding module (4) in a CAS refining stage, when the alloy is added, an argon pipeline (2) turns a ladle (1) into medium argon blowing for T minutes with the flow rate of 30-45 m/h, and then the argon pipeline (2) turns the ladle (1) into soft argon blowing with the flow rate of 15-25 m/h
S5: the molten steel car detects a signal of adding scrap steel in CAS refining at a CAS refining position, and the ladle (1) starts to turn into medium argon blowing Tmin and then automatically turns into soft argon blowing; the argon blowing control module (3) receives a molten steel car refining position signal of the molten steel car in the CAS refining position signal module (7) and a refining adding scrap steel signal of the CAS scrap steel feeding module (5) in a CAS refining stage, when scrap steel is added, the argon pipeline (2) turns the ladle (1) into medium argon blowing for T minutes, the flow is 30-45 m/h, and then the argon pipeline (2) turns the ladle (1) into soft argon blowing, and the flow is 15-25 m/h;
S6: detecting that the molten steel car leaves the refining position signal, stopping argon blowing of the steel ladle (1) and opening a second digital cut-off valve (14) to diffuse residual argon in a pipeline, wherein the argon blowing control module (3) is used for receiving a molten steel car disconnection signal of the molten steel car at the CAS refining position signal module (7) after the molten steel car is transported away from the CAS refining position, stopping argon blowing of the steel ladle (1) by the argon pipeline (2), and controlling the second digital cut-off valve (14) for exhausting to be opened for N seconds and then automatically closing after stopping argon blowing of the steel ladle (1) by the argon pipeline (2).
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| CN202211270720.0A CN115537503B (en) | 2022-10-17 | 2022-10-17 | Automatic argon blowing system and method for steel ladle |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108441602A (en) * | 2018-04-18 | 2018-08-24 | 辽宁鸿盛冶金科技有限公司 | Converter steel ladle bottom argon blowing automatic control system |
| CN114774617A (en) * | 2022-04-11 | 2022-07-22 | 武汉钢铁有限公司 | Ladle bottom argon blowing control method, device, equipment and medium |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108441602A (en) * | 2018-04-18 | 2018-08-24 | 辽宁鸿盛冶金科技有限公司 | Converter steel ladle bottom argon blowing automatic control system |
| CN114774617A (en) * | 2022-04-11 | 2022-07-22 | 武汉钢铁有限公司 | Ladle bottom argon blowing control method, device, equipment and medium |
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| Title |
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| PLC控制系统在二钢吹氩站的应用;张平舜;安徽职业科技学院学报;第14卷(第02期);38-40 * |
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