CN115261543B - Automatic control method for molten iron pretreatment - Google Patents
Automatic control method for molten iron pretreatment Download PDFInfo
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- CN115261543B CN115261543B CN202210864296.6A CN202210864296A CN115261543B CN 115261543 B CN115261543 B CN 115261543B CN 202210864296 A CN202210864296 A CN 202210864296A CN 115261543 B CN115261543 B CN 115261543B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 318
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 159
- 238000000034 method Methods 0.000 title claims abstract description 153
- 230000008569 process Effects 0.000 claims abstract description 111
- 238000004519 manufacturing process Methods 0.000 claims abstract description 77
- 239000002893 slag Substances 0.000 claims abstract description 58
- 238000004364 calculation method Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims description 55
- 238000005070 sampling Methods 0.000 claims description 20
- 238000009529 body temperature measurement Methods 0.000 claims description 13
- 230000033764 rhythmic process Effects 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims 1
- 230000003993 interaction Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 10
- 238000013019 agitation Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
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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
- C21C1/00—Refining of pig-iron; Cast iron
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/04—Removing impurities other than carbon, phosphorus or sulfur
-
- 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
- C21C2300/00—Process aspects
- C21C2300/06—Modeling of the process, e.g. for control purposes; CII
-
- 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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
An automatic control method for molten iron pretreatment firstly defines and configures the operation of the molten iron pretreatment production process flow; and then the automatic control of the molten iron pretreatment process is realized by interaction of the process flow management system with the automatic running control unit, the process calculation and prediction unit, the molten iron pretreatment PLC, the automatic tipping control unit, the automatic slag skimming control unit and the slag skimming machine PLC of the tipping vehicle.
Description
Technical Field
The application relates to the field of molten iron pretreatment, in particular to an automatic control method for molten iron pretreatment.
Background
The main purpose of the molten iron pretreatment process in the metallurgical industry is to carry out desulfurization, dephosphorization and desilication treatment on the blast furnace molten iron, so that the contents of elements such as sulfur, phosphorus and silicon in the molten iron are reduced, and the quality of products of the subsequent steelmaking process is improved, wherein the desulfurization, dephosphorization and desilication processes of the molten iron mainly comprise two types: KR method and blowing method.
The KR process is also known as the stirring process. The technological process includes inserting three-leaf or four-leaf stirring head into ladle to stir, adding material to make molten iron and material react chemically in the vortex to form iron slag, and floating on the surface of molten iron. Finally, the slag is scraped out by a slag removing machine, so as to achieve the aim of molten iron pretreatment. The complete process of the KR method comprises the following steps: the ladle is lifted to a molten iron tilting car by a crown block, the ladle is tilted to a slag removing position by the travelling of the molten iron tilting car to a treatment position, the temperature measurement and sampling of molten iron, the slag removing operation, the return of the molten iron tilting car to the treatment position, the lowering of a molten iron stirring head into the molten iron liquid level, the rotary stirring of the stirring head, the feeding, the slag throwing of the stirring head, the lifting of the stirring head to a waiting machine position, the temperature measurement and sampling after desulfurization, the tilting of the ladle to the slag removing position again, the slag removing operation, the return of the molten iron tilting car, the travelling of the ladle tilting car to the ladle position and the like.
The blowing method is a treatment method in which a lance is inserted into molten iron and a charging agent is directly injected into the molten iron. The material agent chemically reacts with molten iron in the floating process to generate iron slag floating on the molten iron. Finally, the slag is scraped out by a slag removing machine, and the molten iron pretreatment operation is completed. The complete technological process of the blowing method comprises the following steps: the ladle is lifted to a molten iron tilting car by a crown block, the molten iron tilting car moves to a processing position, the temperature of molten iron is measured and sampled, the ladle is tilted to a slag removing position, slag removing operation is performed, the molten iron tilting car returns to the processing position, a spray gun descends and drops into the molten iron liquid level, a spray gun injects material into molten iron, the spray gun ascends to a waiting position, the temperature of the pretreated molten iron is measured and sampled, the ladle is tilted to the slag removing position again, slag removing operation is performed, the molten iron tilting car returns to the processing position again, the molten iron tilting car moves to the ladle lifting position and the like.
Whether the KR method or the blowing method is adopted, the whole pretreatment production process is not separated from the whole intervention of operators, the production efficiency is low, and the labor intensity is high.
Disclosure of Invention
The present application has been made in view of the above problems, and has as its object to provide an automatic control method of molten iron pretreatment that overcomes or at least partially solves the above problems.
In order to solve the technical problems, the embodiment of the application discloses the following technical scheme:
an automatic control method for molten iron pretreatment, comprising:
s100, defining and configuring a molten iron pretreatment production process flow, and sending the definition and configuration of the production process flow to a process flow management system;
s200, a process flow management system acquires a production variety plan, variety indexes and ladle positioning signals of the current product, and automatically controls the ladle to carry out molten iron pretreatment according to defined and configured process production flows.
Further, in S100, defining and configuring a hot metal pretreatment production process flow includes: defining a basic step sequence of a molten iron pretreatment production flow, wherein the basic step sequence at least comprises the following steps: the method comprises the steps of molten iron tilting and moving to a station, molten iron temperature measurement and sampling, ladle tilting, ladle aligning, stirring head descending and stirring, feeding, stirring head slag throwing and lifting to a standby position, spray gun descending into molten iron, spray gun ascending to a standby position, molten iron slag skimming and molten iron tilting and moving to a station.
Further, in S100, defining and configuring a hot metal pretreatment production process flow, further includes: defining the association of the basic steps and basic operations, defining the association of the basic steps and the molten iron pretreatment process production process model, and defining the basic operations, the execution sequence and the execution condition logic of the production process model.
Further, in S100, defining and configuring a hot metal pretreatment production process flow, further includes: according to the actual requirements of different products and different rhythms of the steel mill, a plurality of basic steps are selected for combination configuration, and a plurality of different product production process flows are defined.
Further, in S200, the process management unit obtains the production variety plan, variety index, and ladle in-place signal of the current product, and the method for automatically controlling the ladle to perform the pretreatment of molten iron according to the defined and configured process flow includes:
s201, the process flow management system automatically selects a corresponding pre-configured process production control flow according to the obtained information such as the production variety plan, variety index, production rhythm and the like of the current product.
S202, a process flow management system takes a ladle in-place signal or other signals as a control flow starting signal; after the system receives the signals, according to the definition and the operation time sequence of each basic step sequence of the pre-configuration process production control flow selected in the S201 operation, each system such as an automatic travel control unit, a process calculation and prediction unit, a molten iron pretreatment PLC, an automatic tipping control unit, an automatic slag skimming control unit, a slag skimming machine PLC and the like for automatic interaction and control of the tipping car is executed according to the flow, and the operation of the molten iron pretreatment production flow is carried out until the control of the pre-configuration process flow is completed.
Further, before the automatic production process control is started by the process flow management system, after the iron ladle to be pretreated is lifted to the molten iron tilting car by the crown block, the process flow management unit receives the production variety plan, variety index, production rhythm requirement, molten iron composition, molten iron temperature and molten iron weight data sent by the secondary informatization unit.
Further, in S202, the process calculation and prediction unit includes an operation stirring depth and speed control model, a pretreatment time optimizing model and a charging model, and by operating the stirring depth and speed control model, the pretreatment time optimizing model and the charging model, the optimum insertion depth, the stirring speed curve, the stirring duration, the optimum charging time and the optimum charging amount parameters of the stirring head are calculated.
Further, according to actual requirements of different products and different rhythms of the steelworks, the operations of exiting, suspending and skipping can be performed for each production step in the operation S202.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
the application discloses an automatic control method for molten iron pretreatment, which comprises the steps of defining and configuring a molten iron pretreatment production process flow; then the automatic control purpose of the molten iron pretreatment is realized by the interaction of the process flow management unit, the automatic traveling control unit of the tilting cart, the process calculation and prediction unit, the molten iron pretreatment PLC, the automatic tilting control unit, the automatic slag skimming control unit and the slag skimming machine PLC, and the automatic control system and the automatic control method can be used for connecting each production sub-process of the molten iron pretreatment, so that the automation of the whole process of the molten iron pretreatment production is realized, and the intervention of operators is reduced to the greatest extent.
The technical scheme of the application is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate the application and together with the embodiments of the application, serve to explain the application. In the drawings:
fig. 1 is a flowchart of an automatic control method for molten iron pretreatment in embodiment 1 of the present application;
fig. 2 is a flow chart of the production process of the B product in example 1 of the present application.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In order to solve the problems in the prior art, the embodiment of the application provides an automatic control method for molten iron pretreatment.
Example 1
The embodiment discloses an automatic control method for molten iron pretreatment, as shown in fig. 1, comprising the following steps:
s100, defining and configuring a molten iron pretreatment production process flow, and sending the definition and configuration of the production process flow to a process flow management system;
in this embodiment, defining and configuring a molten iron pretreatment production process flow includes: defining a basic step sequence of a molten iron pretreatment production flow, wherein the basic step sequence at least comprises the following steps: the method comprises the steps of molten iron tilting and moving to a station, molten iron temperature measurement and sampling, ladle tilting, ladle aligning, stirring head descending and stirring, feeding, stirring head slag throwing and lifting to a standby position, spray gun descending into molten iron, spray gun ascending to a standby position, molten iron slag skimming and molten iron tilting and moving to a station.
In this embodiment, defining and configuring the production process flow of molten iron pretreatment further includes: defining the association of the basic steps and basic operations, the association of the basic steps and the molten iron pretreatment process production process model, and the basic operations, the execution sequence and the execution condition logic of the production process model. Specifically, if the ladle returns to the positive step, the related operation can be that the process flow management system sends a return instruction to the automatic tipping control system; the process model such as the process model of descending of a stirring head and stirring step sequence can comprise a stirring depth and speed control model, a pretreatment time optimizing model, a feeding model and the like. When the step of lowering and stirring the stirring head is achieved, the process flow management system initiates a request to the process calculation and prediction system, runs a stirring depth and speed control model, a pretreatment time optimizing model, a feeding model and the like, calculates parameters such as the optimal insertion depth, a stirring speed curve, a pretreatment time length, the optimal feeding time and the optimal feeding amount of the stirring head, and sends parameters such as a command of lowering and rotating the stirring head, the insertion depth, the stirring speed curve and the like to the molten iron pretreatment PLC after the calculation is completed.
In this embodiment, defining and configuring the production process flow of molten iron pretreatment further includes: according to the actual requirements of different products and different rhythms of the steel mill, a plurality of basic steps are selected for combination configuration, and a plurality of different product production process flows are defined. For example, in this embodiment, in the process flow management system, the production process flow of the product a may be defined as follows: pouring molten iron, taking out a travelling station, measuring the temperature of molten iron, sampling, tilting a ladle, taking slag from the molten iron, aligning the ladle, lowering and stirring a stirring head, feeding, throwing slag by the stirring head, lifting to a standby position, measuring the temperature of molten iron, sampling, tilting the ladle, taking slag from the molten iron, aligning the ladle, and pouring molten iron, and travelling out the travelling station; the production process flow of the product B is defined as follows: molten iron tilting car travel station, stirring head descending and stirring, feeding, stirring head slag throwing and lifting to a standby position, molten iron temperature measurement sampling, ladle tilting, molten iron slag skimming, ladle aligning and molten iron tilting car travel station; it can be understood that different production process flows can be predefined for different products, so as to achieve the aim of molten iron pretreatment.
S200, the process management system acquires the type and the in-place signal of the current ladle product, and automatically controls the pretreatment of molten iron for the ladle according to the defined and configured process flow.
Specifically, taking the production process flow of the product B defined above as an example, the control flow of the automatic control system for molten iron pretreatment in this embodiment includes:
s201, after the process flow management system obtains the information of the production variety plan, variety index, production rhythm and the like of the current product, the preconfigured process production control flow of the product B is automatically judged and selected as the current automatic control flow.
S202, after receiving a ladle positioning signal, the process flow management system automatically starts production flow control, and sends a running station command to the automatic running control unit of the tipping vehicle, after receiving the command, the automatic running control unit of the tipping vehicle analyzes the command, and sends an action command to the molten iron pretreatment PLC, so as to control the automatic running of the tipping vehicle to the treatment position; when the running operation is finished, the automatic running control unit of the tipping vehicle feeds a running end signal back to the process flow management unit; the process flow management unit receives the 'walking end' signal, and judges that the 'walking station' operation is ended by combining the tipping vehicle arrival processing position signal fed back by the molten iron pretreatment PLC, and continues to execute the S203 operation;
s203, a process flow management unit sends a stirring head descending and stirring instruction to a process calculation and prediction unit, and the process calculation and prediction unit calculates optimal insertion depth, stirring speed curve, stirring time, optimal feeding time and optimal feeding amount parameters of the stirring head according to the instruction, sends the parameters to a molten iron pretreatment PLC, and automatically controls descending and rotating actions of the stirring head through the molten iron pretreatment PLC;
s204, monitoring charging time by a process flow management unit, and sending a charging instruction and a charging amount parameter to the molten iron pretreatment PLC after the optimal charging time is reached; after receiving the instruction and the parameter, the molten iron pretreatment PLC automatically controls the feeding action of the feed agent;
s205, a process flow management unit sends a stirring head slag throwing and lifting to a standby position instruction to a molten iron pretreatment PLC; after receiving the instruction, the molten iron pretreatment PLC automatically controls the lifting and slag throwing and lifting actions again of the stirring head; after the stirring head lifting, slag throwing and re-lifting actions are completed, the molten iron pretreatment PLC feeds back a slag throwing and lifting ending signal to the process flow management unit, the process flow management unit receives the slag throwing and lifting ending signal, and the stirring head to standby position signal fed back by the molten iron pretreatment PLC is combined to judge that the slag throwing and lifting ending operation is ended, and the S206 operation is continuously executed;
s206, the process flow management unit sends a temperature measurement sampling instruction to the molten iron pretreatment PLC; after receiving the instruction, the molten iron pretreatment PLC automatically controls the temperature measuring sampling gun to finish the actions of descending to the molten iron for temperature measuring sampling and lifting the temperature measuring sampling gun; when the temperature measuring sampling gun is lowered to the molten iron, the molten iron pretreatment PLC feeds a temperature measuring sampling completion signal back to the process flow management unit; the process flow management unit receives a temperature measurement and sampling completion signal, and judges that the temperature measurement and sampling operation is finished by combining signals of a temperature measurement and sampling gun in place and the like fed back by the molten iron pretreatment PLC; continuing to execute the S207 operation;
s207, the process flow management unit sends a tilting command to the automatic tilting control unit, and after receiving the command, the automatic tilting control unit sends an action command to the molten iron pretreatment PLC to control the automatic tilting of the ladle to a proper slag removing angle; when the ladle is automatically tipped to a proper slag removing angle, the automatic tipping control unit feeds a tipping end signal back to the process flow management unit; the process flow management unit receives the tipping end signal, judges that the tipping operation is ended by combining the tipping angle signal fed back by the molten iron pretreatment PLC, and continues to execute the S208 operation;
s208, the process flow management unit sends a command of starting slag skimming to the automatic slag skimming control unit, and after receiving the command of starting slag skimming, the automatic slag skimming control unit controls the action of the slag skimming machine by sending the command to the PLC of the slag skimming machine, and starts automatic slag skimming operation; when the slag removing arm is retracted to the safe position, the automatic slag removing control unit feeds back a slag removing end signal to the process flow management unit; the process flow management unit receives the slag skimming end signal, judges that the slag skimming operation is ended, and continues to execute S209 operation;
s209, the process flow management unit sends a return instruction to the automatic tipping control unit; after receiving the instruction, the automatic tipping control unit controls the automatic return of the ladle by sending an action instruction to the molten iron pretreatment PLC; when the automatic return tilting operation of the ladle is finished, the automatic tilting control unit feeds back a return finishing signal to the flow management unit; the process flow management unit receives a return ending signal and judges the return operation to be ended by combining signals of a tipping angle, a tipping oil cylinder in place and the like fed back by the molten iron pretreatment PLC; continuing to execute the S210 operation;
s210, the process flow management unit sends a 'walking out station' instruction to the automatic tipping vehicle walking control unit, and after receiving the instruction, the automatic tipping vehicle walking control unit controls the automatic tipping vehicle to walk to a ladle hanging position by sending an action instruction to the molten iron pretreatment PLC, so that molten iron pretreatment is completed.
In some preferred embodiments, before the process flow management unit sends a "travel station" instruction to the automatic tilting car travel control unit, after the ladle to be pretreated is lifted to the molten iron tilting car by the crown block, the process flow management unit receives the ladle in-place signal, the production plan, the production quality index and the molten iron composition data sent by the secondary informatization unit.
In some preferred embodiments, the process calculation and prediction unit includes an operational agitation depth and speed control model, a pretreatment time optimizing model, and a charging model, by which an optimum insertion depth, an agitation speed profile, an agitation duration, an optimum charging time, and an optimum charging amount parameter of the agitation head are calculated.
In some preferred embodiments, the exit, pause and skip operations are performed on the production steps according to the actual requirements of different products, different cadences of the steelworks. For example, for the product a, the corresponding steps in S201-S210 may be exited, paused, and skipped according to a preset procedure.
Specifically, the "exit" of the step sequence refers to that before or during the automatic control of the process flow, an operator clicks an "exit" instruction on an operation screen of a monitoring terminal of the process flow management system. After the exit command is confirmed by an operator, the process flow management system sends an exit signal to the equipment or the system related to the current step, instructs the equipment or the system related to the current step to stop automatic operation and enables the equipment to be operated to a safe state. Then, the process flow management system ends the current process flow automatic control and returns to the initial state. For example, in the control flow of the product of the embodiment B, if the seventh step of "slag skimming of molten iron" is currently performed. At this time, the operator sends out an exit command on the operation picture of the monitoring terminal, and the process flow management system sends out the exit command to the automatic slag skimming control system, ends the automatic control of the current process flow and returns to the initial state. Meanwhile, the automatic slag-raking control system which receives the exit command controls the slag-raking machine to be moved to a safe position, and then the slag-raking operation is finished.
"pause" of a process sequence means that an operator identifies a certain subsequent step of a currently selected or executing process sequence as a "pause step" on an operation screen of a monitor terminal before or during the start of automatic control of the process sequence. When the control of the process flow management system enters a 'pause step', the operation defined by the 'pause step' is not executed temporarily, but the current process flow control state is paused and saved, no instruction and no parameter are sent out, and the operator waits for further operation. Further operations at this point may be "continue" or "exit". For example, in the control flow of the product in this embodiment B, if the second step "the stirring head descends and stirs" is currently performed, the operator may manually identify that the subsequent sixth step "the ladle is tipped" as "the pause step". When control of the process flow management system enters the sixth step "ladle tipping", the system immediately pauses, waiting for further "continue" or "exit" operations by the operator. If "continue" is selected, the process flow management system sends a "tip" command to the automatic tip control system as defined by the operation of the "ladle tip" sequence, and continues with the subsequent automatic control process. If "exit" is selected, the process flow management system immediately ends the current process flow automatic control and returns to the initial state.
"skip" of a process sequence means that a certain subsequent step of a currently selected or executing process sequence is identified as a "skip step" by an operator on an operation screen of a monitor terminal before or during the start of automatic control of the process sequence. When control of the process flow management system enters a "skip step," the operations defined by the "skip step" are not performed, but directly pass through the step to enter the next step. For example, in the control flow of the product in the embodiment B, if the operator manually identifies the fifth step "the hot metal temperature measurement sampling" is "skip step". When the control of the process flow management system enters the fifth step of molten iron temperature measurement sampling, the system does not execute the operation of the step of molten iron temperature measurement sampling, but directly skips the step of entering the next step of ladle tipping, and continues the following automatic control process.
The embodiment discloses an automatic control method for molten iron pretreatment, which comprises the steps of defining and configuring a molten iron pretreatment production process flow; then the automatic control purpose of the molten iron pretreatment is realized by the interaction of the process flow management unit, the automatic traveling control unit of the tilting cart, the process calculation and prediction unit, the molten iron pretreatment PLC, the automatic tilting control unit, the automatic slag skimming control unit and the slag skimming machine PLC, and the automatic control system and the automatic control method can be used for connecting each production sub-process of the molten iron pretreatment, so that the automation of the whole process of the molten iron pretreatment production is realized, and the intervention of operators is reduced to the greatest extent.
It should be understood that the specific order or hierarchy of steps in the processes disclosed are examples of exemplary approaches. Based on design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in a sample order, and are not meant to be limited to the specific order or hierarchy presented.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, application lies in less than all features of a single disclosed embodiment. Thus the following claims are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate preferred embodiment of this application.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall unit. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. The processor and the storage medium may reside as discrete components in a user terminal.
For a software implementation, the techniques described in this disclosure may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. These software codes may be stored in memory units and executed by processors. The memory unit may be implemented within the processor or external to the processor, in which case it can be communicatively coupled to the processor via various means as is known in the art.
The foregoing description includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, as used in the specification or claims, the term "comprising" is intended to be inclusive in a manner similar to the term "comprising," as interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean "non-exclusive or".
Claims (7)
1. An automatic control method for molten iron pretreatment, which is characterized by comprising the following steps:
s100, defining and configuring a molten iron pretreatment production process flow, and sending the definition and configuration of the production process flow to a process flow management system;
s200, a process flow management system acquires production variety plan, variety index, production rhythm requirement, molten iron composition, molten iron temperature, molten iron weight and molten iron in-situ signal information of the current product, and automatically controls the pretreatment process of the molten iron according to defined and configured process flows;
in S200, the process flow management system obtains the current production variety plan, variety index, production rhythm requirement, molten iron composition, molten iron temperature, molten iron weight, molten iron in-place signal, and the method for automatically controlling the pretreatment of molten iron for the ladle according to the defined and configured process flow comprises:
s201, the process flow management system automatically selects a corresponding pre-configured process production control flow according to the obtained production variety plan, variety index and production rhythm information of the current product;
s202, a process flow management system takes a ladle in-place signal or other signals as a control flow starting signal; after the system receives the signals, the system automatically starts the control of the production flow of the molten iron pretreatment, defines and operates the time sequence according to each basic step sequence of the production control flow of the pre-configured process selected in the S201 operation, and automatically interacts and controls the automatic running control unit, the process calculation and prediction unit, the molten iron pretreatment PLC, the automatic tipping control unit, the automatic slag skimming control unit and the slag skimming machine PLC of the tipping vehicle to execute according to the flow, so as to perform the operation of the production flow of the molten iron pretreatment until the control of the pre-configured process flow is completely completed.
2. The automatic control method for molten iron pretreatment of claim 1, wherein in S100, defining and configuring the molten iron pretreatment production process flow comprises: defining a basic step sequence of a molten iron pretreatment production flow, wherein the basic step sequence at least comprises the following steps: the method comprises the steps of molten iron tilting and moving to a station, molten iron temperature measurement and sampling, ladle tilting, ladle aligning, stirring head descending and stirring, feeding, stirring head slag throwing and lifting to a standby position, spray gun descending into molten iron, spray gun ascending to a standby position, molten iron slag skimming and molten iron tilting and moving to a station.
3. The automatic control method for molten iron pretreatment of claim 1, wherein in S100, the molten iron pretreatment production process is defined and configured, further comprising: defining the association of the basic steps and basic operations, defining the association of the basic steps and the molten iron pretreatment process production process model, and defining the basic operations, the execution sequence and the execution condition logic of the production process model.
4. The automatic control method for molten iron pretreatment of claim 1, wherein in S100, the molten iron pretreatment production process is defined and configured, further comprising: according to the actual requirements of different products and different production rhythms of a steel mill, a plurality of basic steps are selected for combination configuration, and a plurality of pre-configuration process production flows corresponding to the different products and the different production rhythms are defined.
5. The automatic control method for molten iron pretreatment of claim 1, wherein in S202, before the process flow management system starts the automatic production flow control, after the ladle to be pretreated is lifted from the crown block to the molten iron tilting car, the process flow management unit receives the production variety plan, variety index, production rhythm requirement, molten iron composition, molten iron temperature and molten iron weight data sent by the secondary informatization unit.
6. The automatic control method for molten iron pretreatment of claim 1, wherein in S202, the process calculation and prediction unit comprises an operation stirring depth and speed control model, a pretreatment time optimizing model and a charging model, and the optimal insertion depth, stirring speed curve, stirring time length, optimal charging time and optimal charging amount parameters of the stirring head are calculated by operating the stirring depth and speed control model, the pretreatment time optimizing model and the charging model.
7. The automatic control method for molten iron pretreatment of claim 5, wherein the operations of exiting, suspending and skipping are performed for each production step in the operation S202 according to actual demands of different products and different rhythms production in a steelworks.
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| JPH06346130A (en) * | 1993-06-04 | 1994-12-20 | Nippon Steel Corp | Slag forming detection method by image processing |
| CN104313246A (en) * | 2014-11-24 | 2015-01-28 | 武汉钢铁(集团)公司 | Control method applied to KR desulfurization method |
| CN114574660A (en) * | 2022-02-21 | 2022-06-03 | 山东钢铁股份有限公司 | KR intelligent control method based on-demand desulfurization |
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| US6884269B2 (en) * | 2002-06-13 | 2005-04-26 | Fuelcell Energy, Inc. | Continuous method for manufacture of uniform size flake or powder |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06346130A (en) * | 1993-06-04 | 1994-12-20 | Nippon Steel Corp | Slag forming detection method by image processing |
| CN104313246A (en) * | 2014-11-24 | 2015-01-28 | 武汉钢铁(集团)公司 | Control method applied to KR desulfurization method |
| CN114574660A (en) * | 2022-02-21 | 2022-06-03 | 山东钢铁股份有限公司 | KR intelligent control method based on-demand desulfurization |
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