CN114875210A - Automatic nitrogen-argon switching process for refining furnace - Google Patents
Automatic nitrogen-argon switching process for refining furnace Download PDFInfo
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- CN114875210A CN114875210A CN202210326460.8A CN202210326460A CN114875210A CN 114875210 A CN114875210 A CN 114875210A CN 202210326460 A CN202210326460 A CN 202210326460A CN 114875210 A CN114875210 A CN 114875210A
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- 238000007670 refining Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 25
- PWKWDCOTNGQLID-UHFFFAOYSA-N [N].[Ar] Chemical compound [N].[Ar] PWKWDCOTNGQLID-UHFFFAOYSA-N 0.000 title abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 249
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 188
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 117
- 229910052786 argon Inorganic materials 0.000 claims abstract description 94
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 74
- 239000010959 steel Substances 0.000 claims abstract description 70
- 239000007789 gas Substances 0.000 claims abstract description 41
- 238000005070 sampling Methods 0.000 claims abstract description 4
- 230000001131 transforming effect Effects 0.000 claims abstract description 4
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 15
- 238000003860 storage Methods 0.000 claims description 12
- 230000003595 spectral effect Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000012790 confirmation Methods 0.000 abstract description 2
- 230000032683 aging Effects 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003679 aging effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- ABLLXXOPOBEPIU-UHFFFAOYSA-N niobium vanadium Chemical compound [V].[Nb] ABLLXXOPOBEPIU-UHFFFAOYSA-N 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
-
- 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
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to the technical field of nitrogen-argon switching of a refining furnace, and discloses a process for automatically switching nitrogen and argon of the refining furnace, which comprises the following steps; s1: the method comprises the following steps of transforming an argon gas cabinet, switching and dismantling an original hose, installing a nitrogen main pipe for conveying nitrogen, communicating the nitrogen main pipe with an argon main pipe for conveying argon, and respectively installing a nitrogen pneumatic cut-off valve and an argon pneumatic cut-off valve on the nitrogen main pipe and the argon main pipe; s2: and setting and modifying nitrogen content on an HMI (human machine interface) of a PLC (programmable logic controller) system of the refining furnace body, introducing molten steel into the refining furnace body, and sampling the molten steel. The invention greatly improves the automation degree of equipment, prepares for the next step of intelligent one-key refining, reduces the labor intensity of staff, does not need manual intervention and manual confirmation in the whole process, improves the operation efficiency of the refining furnace, improves the standard operation rate and reduces the skill requirement of the operation on operators.
Description
Technical Field
The invention relates to the technical field of nitrogen-argon switching of a refining furnace, in particular to a process for automatically switching nitrogen and argon of the refining furnace.
Background
The nitrogen content of the molten steel of the converter and the refining furnace can be absorbed from furnace gas and atmosphere during smelting and transportation, so that the nitrogen content in the molten steel is changed, and the nitrogen content in the molten steel can cause quenching aging and deformation aging of carbon steel, thereby having remarkable influence on the performance of the carbon steel. The hardness and strength of the steel are inherently increased by the ageing effect of nitrogen, but the plasticity and toughness are reduced, particularly in the case of deformation ageing, and therefore the ageing phenomenon is harmful to ordinary low-alloy steels, and nitrogen is a harmful element. However, for some fine-grained steels and vanadium-and niobium-containing steels, nitrogen becomes a beneficial element due to the strengthening and grain-refining effect of nitrides, so that the nitrogen content in molten steel needs to be controlled in the smelting process of the molten steel, the purpose of controlling the just-mentioned performance is achieved, and the purpose of controlling the nitrogen content in the molten steel is generally achieved by controlling the switching of nitrogen and argon of bottom-blown gas.
At present, the refining furnace mostly completely depends on manual operation in the aspects of introduction and switching of nitrogen and argon, realizes the aspects of introduction and switching of nitrogen and argon through manual analysis, chemical examination, manual recording and operation, not only has high labor intensity, but also can cause the untimely condition of switching, thereby reducing the operating efficiency of the refining furnace.
Disclosure of Invention
The invention aims to solve the problems that in the prior art, the refining furnace mostly completely depends on manual operation in the aspects of introducing and switching nitrogen and argon, and the operating efficiency of the refining furnace is reduced, and provides a process for automatically switching nitrogen and argon of the refining furnace.
In order to achieve the purpose, the invention adopts the following technical scheme:
a process for automatically switching nitrogen and argon of a refining furnace comprises the following steps;
s1: the method comprises the following steps of transforming an argon gas cabinet, switching and dismantling an original hose, installing a nitrogen header pipe for conveying nitrogen, communicating the nitrogen header pipe with an argon header pipe for conveying argon, and respectively installing a nitrogen pneumatic cut-off valve and an argon pneumatic cut-off valve on the nitrogen header pipe and the argon header pipe;
s2: setting and modifying nitrogen content on an HMI (human machine interface) of a PLC (programmable logic controller) system of a refining furnace body, introducing molten steel into the refining furnace body, and sampling the molten steel;
s3: sending the sample into a laboratory, analyzing and acquiring nitrogen content data in the sample through a spectral composition analyzer, and transmitting the nitrogen content data to a PLC (programmable logic controller) system of a refining furnace body through an industrial internet system to acquire the nitrogen content data in the current molten steel;
s4: the PLC system controls the nitrogen pneumatic cut-off valve to be opened, the argon pneumatic cut-off valve is closed, nitrogen is conveyed to the argon gas cabinet through the nitrogen main pipe, and the nitrogen entering the argon gas cabinet is conveyed to molten steel in the refining furnace body;
s5: extracting a molten steel sample in the refining furnace body at regular time, sending the sample into a laboratory, analyzing and obtaining nitrogen content data in the sample through a spectral component analyzer, and transmitting the nitrogen content data to a PLC (programmable logic controller) system of the refining furnace body through an industrial Internet system to obtain the current nitrogen content data in the molten steel;
s6: repeating S5 operation, until molten steel nitrogen content reaches the settlement nitrogen content of PLC system in the refining furnace body, PLC system control nitrogen gas pneumatic trip valve is closed afterwards to open the pneumatic trip valve of argon gas, nitrogen gas house steward stops to carry nitrogen gas in the argon gas cabinet, and argon gas house steward carries argon gas in to the argon gas cabinet, and the argon gas that gets into in the argon gas cabinet lasts again and carries this internal molten steel of refining furnace.
Preferably, the gas transmission pipeline in the refining furnace body is arranged at the bottom of the refining furnace body, and nitrogen and argon entering the refining furnace body directly enter bottom molten steel in the refining furnace body.
Preferably, the PLC system includes a main control unit, an information receiving unit, a storage unit, an execution unit, and an entry unit;
the main control unit specifically comprises: executing a corresponding setting command according to the information acquired by the PLC system;
the information receiving unit is specifically: the system comprises a main control unit, a data processing unit and a data processing unit, wherein the main control unit is used for receiving information sent from the outside and feeding back the information to the main control unit;
the storage unit is specifically: storing a program to be executed;
the execution unit specifically includes: operating the corresponding equipment to complete the set operation steps according to the execution instruction issued by the main control unit;
the recording unit is specifically as follows: and recording a program to be executed into the storage unit on the HMI human-machine interface.
Preferably, the industrial internet system is provided with a steel program corresponding unit,
the steel grade program corresponds to the unit, and it specifically is: different programs are set in advance according to different types of steel grades, each program corresponds to one type of steel grade,
the industrial internet system is connected with an ERP system of an enterprise, steel grades produced at present are obtained through production plan scheduling information in the ERP system, corresponding steel grade programs in units corresponding to the steel grade programs are called, and the steel grade programs are conveyed to a storage unit in the PLC system to be executed in a covering mode.
Preferably, the pneumatic trip valve of nitrogen gas and the pneumatic trip valve of argon gas all are connected with the solenoid valve, the PLC system is connected with the solenoid valve through the wire, install stop valve and check valve about the pneumatic trip valve of nitrogen gas and the pneumatic trip valve symmetry of argon gas respectively on nitrogen gas house steward and the argon gas house steward.
Preferably, pressure transmitters are arranged on the nitrogen main pipe and the argon main pipe, and the two pressure transmitters are connected with the PLC system through wires.
Compared with the prior art, the invention provides a process for automatically switching nitrogen and argon of a refining furnace, which has the following beneficial effects:
1. this refining furnace nitrogen argon automatic switch's technology, through industry internet system with the PLC system of spectral composition analysis appearance analysis's sample result conveying refining furnace body, through the automatic judgement nitrogen blowing time of procedure, save this link of artifical judgement chemical examination result uncontrolled nitrogen blowing time again, reduced artifical intensity of labour, improved refining furnace operating efficiency.
2. This refining furnace nitrogen argon automatic switch-over's technology through setting for nitrogen content in the PLC system at the refining furnace body, when nitrogen content reachs and sets for the content in the molten steel, the pneumatic trip valve of self-closing nitrogen gas stops nitrogen gas to carry to open the pneumatic trip valve of argon gas, carry out the argon gas and carry, realize automatic switch-over nitrogen, argon gas valve, improved refining furnace operating efficiency.
3. According to the process for automatically switching nitrogen and argon of the refining furnace, the currently produced steel grade is obtained through production plan scheduling information of an ERP system, the nitrogen content set value to be set by the current steel grade is automatically judged according to the steel grade, the nitrogen content value does not need to be reset manually according to the type of molten steel, and the nitrogen and argon valves are automatically switched.
The parts which are not involved in the device are the same as or can be realized by adopting the prior art, the automation degree of equipment is greatly improved, the preparation work is prepared for the next step of intelligent one-key refining, the labor intensity of staff is reduced, the whole link does not need manual intervention and manual confirmation, the operation efficiency of the refining furnace is improved, the standard operation rate is improved, and the skill requirement of the operation on operators is reduced.
Drawings
FIG. 1 is a schematic view of an automatic nitrogen-argon switching process for a refining furnace according to the present invention;
FIG. 2 is a schematic diagram of a PLC system for a process of automatic nitrogen-argon switching of a refining furnace according to the present invention.
In the figure: 1. an argon gas cabinet; 2. a nitrogen header pipe; 3. an argon main pipe; 4. a nitrogen pneumatic cut-off valve; 5. an argon gas pneumatic cut-off valve; 6. a refining furnace body; 7. a spectral component analyzer; 8. an industrial internet system; 9. an ERP system; 10. a stop valve; 11. a check valve; 12. a pressure transmitter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-2, a process for automatic switching of nitrogen and argon in a refining furnace comprises the following steps;
s1: the method comprises the following steps of transforming an argon gas cabinet 1, switching and dismantling an original hose, installing a nitrogen main pipe 2 for conveying nitrogen, communicating an argon main pipe 3 for conveying argon on the nitrogen main pipe 2, respectively installing a nitrogen pneumatic stop valve 4 and an argon pneumatic stop valve 5 on the nitrogen main pipe 2 and the argon main pipe 3, respectively installing pressure transmitters 12 on the nitrogen main pipe 2 and the argon main pipe 3, connecting the two pressure transmitters 12 with a PLC (programmable logic controller) system through a wire, acquiring pressure data values in a pipeline through the pressure transmitters 12, and knowing whether the corresponding pipeline is completely closed when the nitrogen pneumatic stop valve 4 and the argon pneumatic stop valve 5 are closed;
s2: setting and modifying nitrogen content on an HMI (human machine interface) of a PLC (programmable logic controller) system of a refining furnace body 6, introducing molten steel into the refining furnace body 6, and sampling the molten steel;
s3: sending the sample into a laboratory, analyzing and acquiring nitrogen content data in the sample through a spectral component analyzer 7, and transmitting the nitrogen content data to a PLC (programmable logic controller) system of a refining furnace body 6 through an industrial Internet system 8 to acquire the nitrogen content data in the current molten steel;
s4: the PLC system controls the nitrogen pneumatic cut-off valve 4 to be opened, the argon pneumatic cut-off valve 5 to be closed, nitrogen is conveyed to the argon cabinet 1 through the nitrogen header pipe 1, the nitrogen entering the argon cabinet 1 is conveyed to molten steel in the refining furnace body 6, a gas conveying pipeline in the refining furnace body 6 is arranged at the bottom of the refining furnace body 6, the nitrogen and the argon entering the refining furnace body 6 directly enter the molten steel at the bottom in the refining furnace body 6, and the molten steel in the refining furnace body 6 is stirred through the upward floating process of the nitrogen and the argon;
s5: extracting a molten steel sample in the refining furnace body 6 at regular time, sending the sample into a laboratory, analyzing and obtaining nitrogen content data in the sample through a spectral component analyzer 7, and transmitting the nitrogen content data to a PLC (programmable logic controller) system of the refining furnace body 6 through an industrial Internet system 8 to obtain the current nitrogen content data in the molten steel;
s6: repeating S5 operation until the nitrogen content of the molten steel in the refining furnace body 6 reaches the set nitrogen content of the PLC system, then controlling the nitrogen pneumatic cut-off valve 4 to close by the PLC system, opening the argon pneumatic cut-off valve 5, stopping conveying nitrogen into the argon cabinet 1 by the nitrogen header pipe 2, conveying argon into the argon cabinet 1 by the argon header pipe 3, and continuously conveying the argon into the molten steel in the refining furnace body 6 by the argon entering the argon cabinet 1.
The PLC system comprises a main control unit, an information receiving unit, a storage unit, an execution unit and an input unit; the main control unit specifically comprises: executing a corresponding setting command according to the information acquired by the PLC system; an information receiving unit, which is specifically: the system comprises a main control unit, a data processing unit and a data processing unit, wherein the main control unit is used for receiving information sent from the outside and feeding back the information to the main control unit; a storage unit, which is specifically: storing a program to be executed; an execution unit, which is specifically: operating the corresponding equipment to complete the set operation steps according to the execution instruction issued by the main control unit; an entry unit, which is specifically: and recording a program to be executed into the storage unit on the HMI human-machine interface.
The industrial internet system 8 is provided with a steel type program corresponding unit, and the steel type program corresponding unit specifically comprises: different programs are set in advance according to different types of steel, each program corresponds to one type of steel, the industrial Internet system 8 is connected with an ERP system 9 of an enterprise, the currently produced steel is obtained through production plan scheduling information in the ERP system 9, the corresponding steel program in a unit corresponding to the steel program is called and conveyed to a storage unit in a PLC system for covering execution, the nitrogen content set value to be set for the current steel is automatically judged according to the steel, the nitrogen content value does not need to be reset manually according to the type of molten steel, and the nitrogen and argon valves are automatically switched.
The pneumatic stop valve of nitrogen gas 4 and the pneumatic stop valve of argon gas 5 all are connected with the solenoid valve, and the PLC system is connected with the solenoid valve through the wire, installs stop valve 10 and check valve 11 respectively about the pneumatic stop valve of nitrogen gas 4 and the pneumatic stop valve of argon gas 5 symmetry on nitrogen gas house steward 2 and the argon gas house steward 3, prevents through check valve 11 that the interior gas of pipeline from flowing backwards, when the unable normal work of the pneumatic stop valve of nitrogen gas 4 and the pneumatic stop valve of argon gas 5 damage, carries out the manual work through stop valve 10 and closes.
In the invention, the sample result analyzed by the spectral composition analyzer 7 is transmitted to the PLC system of the refining furnace body 6 through the industrial Internet system 8, the nitrogen blowing time is automatically judged through a program, the link of manually judging the test result and controlling the nitrogen blowing time is saved, the manual labor intensity is reduced, the operating efficiency of the refining furnace is improved, the nitrogen content is set in the PLC system of the refining furnace body 1, when the nitrogen content in the molten steel reaches the set content, the nitrogen pneumatic stop valve 4 is automatically closed, the nitrogen conveying is stopped, the argon pneumatic stop valve 5 is opened for argon conveying, the automatic switching of the nitrogen and argon valves is realized, the currently produced steel grade is obtained through the production plan scheduling information of the ERP system 9, the set value of the nitrogen content which is required to be set by the current steel grade is automatically judged according to the steel grade, the nitrogen content value is not required to be manually reset according to the molten steel grade, realize automatic switching nitrogen, argon gas valve.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A process for automatically switching nitrogen and argon of a refining furnace is characterized by comprising the following steps;
s1: the method comprises the following steps of transforming an argon gas cabinet, switching and dismantling an original hose, installing a nitrogen header pipe for conveying nitrogen, communicating the nitrogen header pipe with an argon header pipe for conveying argon, and respectively installing a nitrogen pneumatic cut-off valve and an argon pneumatic cut-off valve on the nitrogen header pipe and the argon header pipe;
s2: setting and modifying nitrogen content on an HMI (human machine interface) of a PLC (programmable logic controller) system of a refining furnace body, introducing molten steel into the refining furnace body, and sampling the molten steel;
s3: sending the sample into a laboratory, analyzing and acquiring nitrogen content data in the sample through a spectral composition analyzer, and transmitting the nitrogen content data to a PLC (programmable logic controller) system of a refining furnace body through an industrial internet system to acquire the nitrogen content data in the current molten steel;
s4: the PLC system controls the nitrogen pneumatic cut-off valve to be opened, the argon pneumatic cut-off valve is closed, nitrogen is conveyed to the argon gas cabinet through the nitrogen main pipe, and the nitrogen entering the argon gas cabinet is conveyed to molten steel in the refining furnace body;
s5: extracting a molten steel sample in the refining furnace body at regular time, sending the sample into a laboratory, analyzing and obtaining nitrogen content data in the sample through a spectral component analyzer, and transmitting the nitrogen content data to a PLC (programmable logic controller) system of the refining furnace body through an industrial Internet system to obtain the current nitrogen content data in the molten steel;
s6: repeating S5 operation, until molten steel nitrogen content reaches the settlement nitrogen content of PLC system in the refining furnace body, PLC system control nitrogen gas pneumatic trip valve is closed afterwards to open the pneumatic trip valve of argon gas, nitrogen gas house steward stops to carry nitrogen gas in the argon gas cabinet, and argon gas house steward carries argon gas in to the argon gas cabinet, and the argon gas that gets into in the argon gas cabinet lasts again and carries this internal molten steel of refining furnace.
2. The process of claim 1, wherein the gas lines in the refining furnace body are arranged at the bottom of the refining furnace body, and the nitrogen and argon entering the refining furnace body directly enter the bottom molten steel in the refining furnace body.
3. The process of claim 1, wherein the PLC system comprises a master control unit, an information receiving unit, a storage unit, an execution unit, and a logging unit;
the main control unit specifically comprises: executing a corresponding setting command according to the information acquired by the PLC system;
the information receiving unit is specifically: the system comprises a main control unit, a data processing unit and a data processing unit, wherein the main control unit is used for receiving information sent from the outside and feeding back the information to the main control unit;
the storage unit is specifically: storing a program to be executed;
the execution unit specifically includes: operating the corresponding equipment to complete the set operation steps according to the execution instruction issued by the main control unit;
the recording unit is specifically as follows: and recording a program to be executed into the storage unit on the HMI human-machine interface.
4. The process of claim 3, wherein the industrial Internet system is provided with a steel program corresponding unit,
the steel grade program corresponds to the unit, and it specifically is: different programs are set in advance according to different types of steel grades, each program corresponds to one type of steel grade,
the industrial internet system is connected with an ERP system of an enterprise, steel grades produced at present are obtained through production plan scheduling information in the ERP system, corresponding steel grade programs in units corresponding to the steel grade programs are called, and the steel grade programs are conveyed to a storage unit in the PLC system to be executed in a covering mode.
5. The process of claim 1, wherein the pneumatic nitrogen and argon shut-off valve and the pneumatic argon shut-off valve are connected with solenoid valves, the PLC system is connected with the solenoid valves through wires, and the nitrogen main pipe and the argon main pipe are respectively provided with stop valves and check valves symmetrically about the pneumatic nitrogen shut-off valve and the pneumatic argon shut-off valve.
6. The process of claim 1, wherein pressure transmitters are mounted on the nitrogen main and the argon main, and the two pressure transmitters are connected with a PLC system through wires.
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| CN115786644A (en) * | 2022-11-17 | 2023-03-14 | 山东莱钢永锋钢铁有限公司 | Automatic control steel ladle bottom blowing gas conveying equipment |
| CN115820985A (en) * | 2022-11-25 | 2023-03-21 | 山东钢铁股份有限公司 | Method for accurately controlling nitrogen content of molten steel of deformed steel bar |
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