WO2024016409A1

WO2024016409A1 - Automatic control system for molten iron pretreatment

Info

Publication number: WO2024016409A1
Application number: PCT/CN2022/112182
Authority: WO
Inventors: 吴经纬; 祝兵权
Original assignee: 中冶南方工程技术有限公司
Priority date: 2022-07-21
Filing date: 2022-08-12
Publication date: 2024-01-25
Also published as: CN115167270A

Abstract

An automatic control system for molten iron pretreatment, comprising a molten iron pretreatment PLC, a molten iron pretreatment HMI, a slagging-off machine PLC, an automatic slagging-off control unit, an automatic tilting control unit, a tilting car automatic traveling control unit, a molten iron pretreatment process calculation and prediction unit, and a technological process management unit. The automatic control system for molten iron pretreatment disclosed by the present invention achieves the purpose of automatic control of molten iron pretreatment, and by using the automatic control system and an automatic control method, all production sub-procedures of molten iron pretreatment can be connected, such that automation of the whole process of molten iron pretreatment production is achieved, and intervention of operators is reduced to the maximum extent.

Description

An automatic control system for molten iron pretreatment

Technical field

The invention relates to the field of molten iron pretreatment, and in particular to an automatic control system for molten iron pretreatment.

Background technique

The main purpose of the molten iron pretreatment process in the metallurgical industry is to desulfurize, dephosphorize, and desilicon the molten iron in the blast furnace, thereby reducing the content of sulfur, phosphorus, silicon and other elements in the molten iron, and improving the product quality of the subsequent steelmaking process. There are two main dephosphorization and desiliconization processes: KR method and injection method.

The KR method is also called the stirring method. The process is to insert a three-blade or four-blade stirring head into the molten iron ladle for stirring, and then add a certain amount of additives to the stirred molten iron, so that the molten iron and the additives react chemically in the stirring vortex, and the additives and Elements such as sulfur, phosphorus, and silicon are combined and transformed into iron slag, which floats on the surface of molten iron. Finally, use a slag scraper to scoop out the iron slag to achieve the purpose of pretreatment of molten iron. The complete process of the KR method includes: lifting the iron ladle from the crane to the molten iron tipper, moving the molten iron tipper to the processing position, temperature measurement and sampling of the molten iron, tipping the iron ladle to the slag removal position, and the operation of removing the slag. The molten iron tipping car returns to the processing position, the molten iron mixing head is lowered and submerged into the molten iron liquid level, the mixing head rotates to stir, feed, the mixing head throws slag, the mixing head rises to the standby position, the temperature is measured and sampled after desulfurization, and the iron ladle is tipped again to Operations such as the slag removal position, the operation of removing the slag, the molten iron tipper returning to the right position, and the movement of the molten iron tipper to the lifting bag position.

The injection method is a treatment method in which a spray gun is inserted into the molten iron and the agent is directly injected into the molten iron. During the floating process, the additive reacts chemically with the molten iron to produce iron slag floating in the molten iron. Finally, a slag scraper is also used to dig out the slag to complete the molten iron pretreatment operation. The complete process of the injection method includes: lifting the iron ladle from the crane to the molten iron tipper, moving the molten iron tipper to the processing position, temperature measurement and sampling of the molten iron, tipping the iron ladle to the slag removal position, and the operation of removing the slag. , the molten iron tipping car returns to the processing position, the spray gun is lowered and submerged into the molten iron liquid level, the spray gun injects materials into the molten iron, the spray gun rises to the standby position, temperature measurement and sampling after pretreatment, the iron ladle is tipped again to the slag removal position, and the Operations such as rear slag operation, returning the molten iron tipper to the right position again, and moving the molten iron tipper to the lifting bag position.

However, regardless of the KR method or the injection method, the entire pretreatment production process is still inseparable from the full intervention of operators, resulting in low production efficiency and high labor intensity.

Contents of the invention

In view of the above problems, the present invention is proposed to provide an automatic control system for molten iron pretreatment that overcomes the above problems or at least partially solves the above problems.

In order to solve the above technical problems, the embodiments of this application disclose the following technical solutions:

An automatic control system for molten iron pretreatment, including: molten iron pretreatment PLC, molten iron pretreatment HMI, slag removal machine PLC, automatic slag removal control unit, automatic tipping control unit, tilting car automatic travel control unit, and molten iron pretreatment process Calculation and prediction unit and process management unit; among which:

The molten iron pretreatment PLC is used to collect the I/O status signals of the equipment in the molten iron pretreatment station, and directly output signals to control the start, stop and switch actions of the molten iron pretreatment equipment;

The molten iron pretreatment HMI is used for operators to visually monitor the equipment status, process parameters, energy medium consumption, interlocking signals, alarm information, and data history curves in the molten iron pretreatment station. It is also used to provide an interface for operators to report to the molten iron pretreatment PLC. Issue equipment action instructions; provide an interface for operators to input equipment action or system operation setting parameters;

The PLC of the slag scraper is used to collect the I/O status signals of the lifting height of the molten iron slag scraper, the telescopic length, pitch angle, and rotation angle of the slag scraper arm, and directly control a series of actions such as lifting, telescoping, pitching, and rotation of the slag scraper;

The automatic slagging control unit is used for the automatic control of molten iron slagging operations. The unit includes various sensors required for automatic slagging control, several cameras, and an automatic slagging control server. Among them, a series of detection of automatic slagging , analysis and control models run on the automatic slag removal server;

The automatic tipping control unit is used to automatically control the tipping and righting process of the iron ladle; the unit includes various sensors required for automatic tipping control, several cameras, and the automatic tipping control server; among them, the automatic tipping control unit A series of detection, analysis and control models are run on the automatic tipping server;

The automatic travel control unit of the tipper is used to automatically control the travel process of the tipper from the lifting bag position to the processing position, and from the processing position to the lifting bag position. This unit includes various sensors and several cameras required for automatic travel control. and an automatic walking control server; among which, a series of detection, analysis and control models for automatic walking are run on the automatic walking control server;

The molten iron pretreatment process calculation and prediction unit is used to realize the configuration, management, parameter setting, response request and model calculation functions of the production process model. This unit includes a process calculation and prediction server. The software system of the production process model is used in process calculation and Run on prediction server;

The process management unit defines and configures the molten iron pretreatment production process, sets parameters and automatically controls the molten iron; this unit includes a process management server and a monitoring terminal, in which the process management software system runs on the process management server. The monitoring terminal provides a human-machine operation interface for monitoring the entire production process, manually sending control instructions, defining and configuring parameters, viewing information, and confirming instructions.

Further, the product production process flow definition and configuration unit defines and configures the molten iron pretreatment production process, including: defining the basic steps of the molten iron pretreatment production process, wherein the basic steps at least include: molten iron tipping and walking Station, molten iron temperature measurement and sampling, iron ladle tipping, iron ladle return to normal, mixing head lowering and stirring, feeding, mixing head slag removal and lifting to the standby position, spray gun lowering into the molten iron, spray gun rising to the standby position, molten iron slag removal , the hot metal dump truck walked out of the station.

Furthermore, the product production process flow definition and configuration unit defines and configures the molten iron pretreatment production process, and also includes: defining the association between basic steps and basic operations, and defining the relationship between the basic steps and the molten iron pretreatment process production process model. Association, as well as the conditional logic that defines the execution sequence and execution of basic operations, production process models.

Furthermore, the product production process flow definition and configuration unit defines and configures the molten iron pretreatment production process, and also includes: selecting multiple basic steps for combined configuration according to the actual needs of different products and different production rhythms in the steel plant, Define a variety of preconfigured process production processes corresponding to different products and different production rhythms.

Further, the process flow management unit pre-processes the molten iron for the iron ladle according to the defined and configured process flow by obtaining the current production variety plan, variety indicators, production rhythm requirements, molten iron composition, molten iron temperature, molten iron weight, and molten iron in-position signal. Automatic control of processing, the control process includes:

S201. The process flow management unit automatically selects the corresponding preconfigured process production control process according to the production variety plan, variety index, and production rhythm information of the current product;

S202. The process management unit uses the iron ladle in place signal or other signals as the control process start signal; after receiving the above signal, the system automatically starts the molten iron pretreatment production process control and produces according to the preconfigured process selected in S201 operation. The basic step definition and operation sequence of the control process, automatic interaction and control of the tipper automatic travel control unit, process calculation and prediction unit, molten iron pretreatment PLC, automatic tipping control unit, automatic slag removal control unit and slag removal machine PLC According to the process execution, the production process operation of molten iron pretreatment is carried out until the control of the preconfigured process flow is completed.

Further, in S202, before the process flow management unit starts the automatic production process control, the iron ladles to be preprocessed and produced need to be lifted from the overhead crane to the molten iron tipper, and the process flow management unit receives the information from the secondary information unit The sent production variety plan, variety indicators, production rhythm requirements, molten iron composition, molten iron temperature, and molten iron weight data.

Furthermore, the production process model in the process calculation and prediction unit includes the operating mixing depth and speed control model, the pretreatment time optimization model and the feeding model. By operating the mixing depth and speed control model, the pretreatment time optimization model and the feeding model , calculate the optimal insertion depth of the mixing head, mixing speed curve, mixing time, optimal feeding time and optimal feeding amount parameters.

Further, according to the actual needs of different products and different production rhythms in the steel plant, exit, pause and skip operations can be performed on each production step in the S202 operation.

The beneficial effects of the above technical solutions provided by the embodiments of the present invention at least include:

The invention discloses an automatic control system for molten iron pretreatment, which includes: molten iron pretreatment PLC, molten iron pretreatment HMI, slag removal machine PLC, automatic slag removal control unit, automatic tipping control unit, and tilting car automatic travel control unit. The molten iron pretreatment process calculation and prediction unit and the process flow management unit; the molten iron pretreatment PLC is used to collect the I/O status signals of the equipment in the molten iron pretreatment station, and directly output signals to control the start, stop, and switch actions of the molten iron pretreatment equipment. ; Molten iron pretreatment HMI is used for operators to visually monitor the equipment status, process parameters, energy medium consumption, interlocking signals, alarm information, and data history curves in the molten iron pretreatment station. It is also used to provide an interface for operators to report to molten iron pretreatment stations. The PLC issues equipment action instructions; provides an interface for the operator to input equipment actions or system operation setting parameters; the slag scraper PLC is used to collect the lifting height of the molten iron slag scraper, the telescopic length, pitch angle, and rotation angle of the scraper arm. O status signal, and directly controls a series of actions such as lifting, telescoping, pitching, and rotation of the slagging machine; the automatic slagging control unit is used to automatically control the molten iron slag slagging operation; the automatic tipping control unit is used to automatically control the iron ladle The tipping and righting process; the automatic movement control unit of the tilting vehicle is used to automatically control the movement of the tipping vehicle from the lifting bag position to the processing position, and from the processing position to the lifting bag position; the molten iron pretreatment process calculation and prediction unit is used to To realize the configuration, management, parameter setting, response request and model calculation function of the production process model; the process flow management unit defines and configures the molten iron pretreatment production process, parameter setting and automatic control of the molten iron; through the present invention The disclosed automatic control system for molten iron pretreatment realizes the purpose of automatic control of molten iron pretreatment. The automatic control system and the automatic control method can be used to connect the various production sub-processes of molten iron pretreatment to achieve the goal of the entire molten iron pretreatment production process. Automated to minimize operator intervention.

The technical solution of the present invention will be further described in detail below through the accompanying drawings and examples.

Description of drawings

The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. In the attached picture:

Figure 1 is a schematic structural diagram of an automatic control system for molten iron pretreatment in Embodiment 1 of the present invention;

Figure 2 is a flow chart of the production process of product B in Embodiment 1 of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a thorough understanding of the disclosure, and to fully convey the scope of the disclosure to those skilled in the art.

In order to solve the problems existing in the prior art, embodiments of the present invention provide an automatic control system for molten iron pretreatment.

Example 1

An automatic control system for molten iron pretreatment, as shown in Figure 1, includes: molten iron pretreatment PLC, molten iron pretreatment HMI, slag removal machine PLC, automatic slag removal control unit, automatic tipping control unit, tilting car automatic travel control unit, Molten iron pretreatment process calculation and prediction unit and process flow management unit;

Specifically, the molten iron pretreatment PLC, the slag removal machine PLC, the molten iron pretreatment HMI, the tipper automatic traveling control unit, the automatic tipping control unit, the automatic slag removal control unit, and the process management unit are connected through industrial Ethernet; the process flow The management unit and the secondary information system are connected through Ethernet; the hot metal pretreatment PLC and the tipping/traveling operating console are connected through hard wiring; the slag removal machine PLC and the slag removal machine operating console are connected through hard wiring; the tilting machine is connected through hard wiring. The remote control of the rolling cart and the molten iron pretreatment PLC are connected through industrial wireless Ethernet. In different embodiments, the molten iron pretreatment PLC and the slag removal machine PLC can be two independent PLC systems, or they can share one PLC system. Both solutions do not affect the realization of PLC system functions.

The automatic slagging control unit is used for the automatic control of molten iron slagging operations. The unit includes various sensors required for automatic slagging control, several cameras, and an automatic slagging control server. Among them, a series of detection of automatic slagging , analysis and control models run on the automatic slag removal server; the sensors included in the automatic slag removal control unit include but are not limited to liquid level gauges, encoders, laser rangefinders, inclination sensors, linear displacement sensors, etc.; included are one The multiple cameras may be visible light cameras, infrared cameras, far-infrared cameras, etc.

The slag removal operating platform is equipped with handles, buttons, selector switches, indicator lights, etc. The molten iron slag removal operation can be completed manually on the slag removal operating table, or it can be completed automatically under the control of the automatic slag removal control unit. According to different embodiments, whether to adopt manual or automatic control mode can be selected using a knob on the slag-removing operation console or on the operation interface of the automatic slag-removing server. Manually completing the slag removal on the operating platform is only used as a backup measure when the automatic slag removal control unit or the molten iron pretreatment automatic control unit is not running, and is not within the scope of the automatic control system and automatic control method of the present invention.

The automatic tipping control unit is used to automatically control the tipping and righting process of the iron ladle; the unit includes various sensors required for automatic tipping control, several cameras, and the automatic tipping control server; among them, the automatic tipping control unit A series of detection, analysis and control models are run on the automatic tipping server; the sensors included in the automatic tipping control unit include but are not limited to encoders, inclination sensors, linear displacement sensors, etc.; one or more cameras are included It can be a visible light camera, an infrared camera or a far-infrared camera, etc.

The traveling/tilting operating platform is equipped with buttons, selector switches, indicator lights, etc. The tipping operation of the iron ladle can be performed manually on the traveling/tilting operating platform, or automatically controlled by the automatic tipping control system. According to different embodiments, whether to adopt manual or automatic control mode can be selected with a knob on the traveling/tilting operating platform or on the operating interface of the automatic tilting control server.

The sensors included in the automatic travel control unit of the dump truck include but are not limited to limit switches, laser range finders, etc.; the one or more cameras included can be visible light cameras, infrared cameras, or far-infrared cameras, etc. The traveling operation of the tipping vehicle can be performed manually on the traveling/tilting operating platform or on the remote control, or it can be performed automatically under the control of the automatic traveling control unit. According to different embodiments, whether the control mode is manual on the console, manual on the remote control or automatic, it can be selected with a knob on the traveling/tilting operating console or on the operating interface of the automatic traveling control server.

Manually complete the tipping and righting operations of the iron ladle and the moving actions of the molten iron tipping car on the operating platform. This is only used as a backup measure when the automatic tipping control unit, the automatic moving control unit of the tipping car or the automatic control unit for molten iron pretreatment is not running. , is not within the scope of the automatic control system and automatic control method of the present invention.

The molten iron pretreatment process calculation and prediction unit is used to realize the configuration, management, parameter setting, response request and model calculation functions of the production process model. This unit includes a process calculation and prediction server. The software system of the production process model is used in process calculation and Run on the prediction server; the production process model in the process calculation and prediction unit includes the running mixing depth and speed control model, the preprocessing time optimization model and the feeding model. By running the mixing depth and speed control model, the preprocessing time optimization model and The feeding model calculates the optimal insertion depth of the mixing head, the mixing speed curve, the mixing time, the optimal feeding time and the optimal feeding amount parameters.

The process management unit defines and configures the molten iron pretreatment production process, sets parameters and automatically controls the molten iron; this unit includes a process management server and a monitoring terminal, in which the process management software system runs on the process management server. The monitoring terminal provides a human-machine operation interface for monitoring the entire production process, manually sending control instructions, parameter definition and configuration, information viewing and instruction confirmation.

In this embodiment, the product production process flow definition and configuration unit defines and configures the molten iron pretreatment production process, including: defining the basic steps of the molten iron pretreatment production process, where the basic steps at least include: molten iron pouring Rolling over and moving into the station, hot metal temperature measurement and sampling, iron ladle tipping, iron ladle return to the right position, mixing head lowering and stirring, feeding, mixing head slag removal and lifting to the standby position, spray gun lowering into the hot metal, spray gun rising to the standby position, The molten iron slag removal and molten iron tipping trucks walked out of the station.

In some preferred embodiments, the product production process flow definition and configuration unit defines and configures the molten iron pretreatment production process, and also includes: defining the association between basic steps and basic operations, defining the basic steps and the molten iron pretreatment process The association of the production process model, and the conditional logic that defines the basic operations, execution sequence and execution of the production process model.

In some preferred embodiments, the product production process flow definition and configuration unit defines and configures the molten iron pretreatment production process, and also includes: selecting multiple basic steps according to the actual needs of different products and different production rhythms in the steel plant. Perform combined configurations to define multiple preconfigured process production processes corresponding to different products and different production rhythms.

In this embodiment, the process flow management unit obtains the current production variety plan, variety indicators, production rhythm requirements, molten iron composition, molten iron temperature, molten iron weight, and molten iron position signal, and performs the iron ladle according to the defined and configured process flow. Automatic control of molten iron pretreatment, the control process includes:

S201. The process flow management system automatically selects the corresponding preconfigured process production control process according to the production variety plan, variety indicators, and production rhythm information of the current product;

S202. The process flow management system uses the iron ladle in place signal or other signals as the control process start signal; after receiving the above signal, the system automatically starts the molten iron pretreatment production process control and produces according to the preconfigured process selected in S201 operation. The basic step definition and operation sequence of the control process, automatic interaction and control of the tipper automatic travel control unit, process calculation and prediction unit, molten iron pretreatment PLC, automatic tipping control unit, automatic slag removal control unit and slag removal machine PLC According to the process execution, the production process operation of molten iron pretreatment is carried out until the control of the preconfigured process flow is completed.

In S202 of this embodiment, before the process flow management unit starts the automatic production process control, the iron ladles to be preprocessed and produced need to be lifted from the crane to the molten iron tipper, and the process flow management unit receives the secondary information. The production variety plan, variety indicators, production rhythm requirements, molten iron composition, molten iron temperature, and molten iron weight data sent by the chemical unit. In this embodiment, according to the actual needs of different products and different production rhythms of the steel plant, exit, pause and skip operations can be performed on each production step in operation S202.

In order to better understand this embodiment, as shown in Figure 2, the following takes the production process flow of product B as an example. The control flow of the molten iron pretreatment automatic control system includes:

S201. After obtaining the production variety plan, variety index, production rhythm and other information of the current product, the process flow management unit automatically determines and selects the preconfigured process production control process of product B as the current automatic control process.

S202. After the process management system receives the iron ladle in place signal, it automatically starts the production process control and sends the "walking into the station" instruction to the dump truck automatic traveling control unit. After receiving the instruction, the dump truck automatic traveling control unit Analyze and send action instructions to the molten iron pretreatment PLC to control the dump truck to automatically move to the processing position; when the walking operation is completed, the dump truck automatic moving control unit feeds back the "walking end" signal to the process management unit; the process management unit receives When the "walking end" signal is reached, combined with the tipping car arrival signal fed back by the molten iron pretreatment PLC, it is judged that the "walking into the station" operation is over, and the S203 operation continues;

S203. The process flow management unit sends the "mixing head lowering and stirring" instruction to the process calculation and prediction unit. The process calculation and prediction unit calculates the optimal insertion depth of the mixing head, the mixing speed curve, the mixing time, the optimal feeding time, and Optimal feeding amount parameters are sent to the molten iron pretreatment PLC, which automatically controls the lowering and rotation of the mixing head through the molten iron pretreatment PLC;

S204. The process management unit monitors the feeding time. When the optimal feeding time arrives, it sends a "feeding" instruction and "feeding amount" parameter to the molten iron pretreatment PLC. After receiving the instructions and parameters, the molten iron pretreatment PLC automatically controls Dosing action of ingredients;

S205. The process management unit sends the "mixing head slag removal and lifting to standby position" command to the molten iron pretreatment PLC; after receiving the command, the molten iron pretreatment PLC automatically controls the stirring head lifting, slag rejection and re-lifting actions; when the mixing head After the lifting, slag rejection and re-lifting actions are completed, the molten iron pretreatment PLC feeds back the "slag rejection and lifting end" signal to the process management unit. The process management unit receives the "slag rejection and lifting end" signal, combined with the molten iron pretreatment PLC The feedback signal of the mixing head reaching the standby position determines that the "slag rejection and lifting end" operation is completed, and continues to perform S206 operation;

S206. The process management unit sends a "temperature measurement and sampling" instruction to the molten iron pretreatment PLC; after receiving the instruction, the molten iron pretreatment PLC automatically controls the temperature measurement sampling gun to complete the actions of lowering the temperature measurement sampling gun into the molten iron for temperature measurement sampling and raising the temperature measurement sampling gun; When the temperature measurement sampling gun is lowered into the molten iron for temperature measurement sampling and the action of lifting the temperature measurement sampling gun is completed, the molten iron pretreatment PLC feeds back the "temperature measurement sampling completed" signal to the process management unit; the process management unit receives the "temperature measurement sampling completed" signal. "Sampling completed" signal, combined with signals such as the temperature measurement sampling gun in place fed back by the molten iron pretreatment PLC, determines that the "temperature measurement sampling" operation is completed; continue to perform S207 operation;

S207. The process management unit sends a "tilt" command to the automatic tipping control unit. After receiving the command, the automatic tipping control unit sends an action command to the molten iron pretreatment PLC to control the iron ladle to automatically tip to the appropriate slag removal angle. ; When the iron ladle is automatically tipped to the appropriate slagging angle, the automatic tipping control unit feeds back the "tilting end" signal to the process management unit; the process management unit receives the "tilting end" signal and combines it with the molten iron Preprocess the tipping angle signal fed back by the PLC, judge that the "tilting" operation is over, and continue to perform the S208 operation;

S208. The process management unit sends a "start slag removal" command to the automatic slag removal control unit. After receiving the "start slag removal" command, the automatic slag removal control unit controls the action of the slag removal machine by sending instructions to the slag removal machine PLC. Start the automatic slag removal operation; when the slag removal arm returns to a safe position, the automatic slag removal control unit feeds back the "slag removal end" signal to the process management unit; the process flow management unit receives the "slag removal end" signal and determines " The "Scrap" operation is completed and the S209 operation continues;

S209. The process management unit sends a "return" instruction to the automatic tipping control unit; after receiving the instruction, the automatic tipping control unit controls the iron ladle to automatically return to normal by sending an action command to the molten iron pretreatment PLC; when the iron ladle automatically After the back-to-right tilting operation is completed, the automatic tilting control unit feeds back the "back-to-right end" signal to the process management unit; the process management unit receives the "back-to-right end" signal and combines the tipping angle and tilt feedback from the molten iron pretreatment PLC. Turn the oil cylinder to the position and wait for the signal to judge that the "returning" operation is completed; continue to perform S210 operation;

S210. The process management unit sends a "walk out" instruction to the dump truck automatic traveling control unit. After receiving the instruction, the dump truck automatic traveling control unit controls the dump truck to automatically move to the lifting bag by sending action instructions to the molten iron pretreatment PLC. position to complete the pretreatment of molten iron.

In some preferred embodiments, exit, pause and skip operations are performed on the production operation steps according to the actual needs of different products and different production rhythms in the steel plant. For example, for product A, the corresponding steps in S201-S210 can be exited, paused and skipped according to the preset process.

Specifically, the "exit" of the step means that the operator clicks the "exit" command on the monitoring terminal operation screen of the process management system before the process automatic control starts or during operation. After the "exit" command is confirmed by the operator, the process flow management system sends an "exit" signal to the equipment or systems involved in the current step, instructing the equipment or systems involved in the current step to stop automatic operation and run the equipment to a safe state. Subsequently, the process flow management system ends the current process flow automatic control and returns to the initial state. For example, in the control process of product B in this embodiment, if the seventh step "hot metal slag removal" is currently being performed. At this time, the operator issues an "exit" command on the monitoring terminal operation screen, and the process flow management system issues an "exit" command to the automatic slag removal control system, ends the current process flow automatic control, and returns to the initial state. At the same time, the automatic slag removal control system that receives the "exit" command controls the slag removal machine to move to a safe position and then ends the slag removal operation.

The "pause" of a step refers to the operator marking a subsequent step of the currently selected or executing process as a "pause step" on the operating screen of the monitoring terminal before the automatic control of the process starts or during operation. ". When the control of the process flow management system enters the "pause step", the operations defined by the "pause step" are not performed temporarily, but the current process flow control status is paused and saved, without issuing any instructions or any parameters, waiting for further operations by the operator. The further operation at this time can be "continue" or "exit". For example, in the control process of product B in this embodiment, if the second step "mixing head lowering and stirring" is currently being performed, the operator can manually mark the subsequent sixth step "iron ladle tipping" as " Pause step". When the control of the process flow management system enters the sixth step of "iron ladle tipping", the system immediately pauses and waits for further "continue" or "exit" operations by the operator. If "Continue" is selected, the process flow management system will send a "tilt" command to the automatic tipping control system according to the operation definition of the "iron ladle tipping" step, and continue the subsequent automatic control process. If you select "Exit", the process flow management system will immediately end the current process flow automatic control and return to the initial state.

The "skip" of a step refers to the operator marking a subsequent step of the currently selected or executing process as "skip" on the operating screen of the monitoring terminal before the automatic control of the process starts or during operation. Too much." When the control of the process flow management system enters the "skip step", the operation defined by the "skip step" is not performed, but directly skips the step and enters the next step. For example, in the control process of product B in this embodiment, if the operator manually marks the fifth step "Molten Iron Temperature Measurement and Sampling" as a "skip step". When the control of the process flow management system enters the fifth step "Molten Iron Temperature Measurement and Sampling", the system does not perform the operation of the "Molten Iron Temperature Measurement and Sampling" step, but directly skips to the next step "Iron Ladle Tipping" ”, and continue the subsequent automatic control process.

This embodiment discloses an automatic control system for molten iron pretreatment, including: molten iron pretreatment PLC, molten iron pretreatment HMI, slag removal machine PLC, automatic slag removal control unit, automatic tipping control unit, and tilting car automatic travel control unit , molten iron pretreatment process calculation and prediction unit and process flow management unit; molten iron pretreatment PLC, used to collect I/O status signals of equipment in the molten iron pretreatment station, and directly output signals to control the start, stop, and switch of the molten iron pretreatment equipment. Action; HMI for molten iron pretreatment is used for operators to visually monitor the equipment status, process parameters, energy medium consumption, interlocking signals, alarm information, and data history curves in the molten iron pretreatment station. It is also used to provide an interface for operators to report to molten iron pretreatment stations. Processing PLC issues equipment action instructions; provides an interface for operators to input equipment actions or system operation setting parameters; slag scraper PLC is used to collect I of the lifting height of the molten iron slag scraper, telescopic length, pitch angle, and rotation angle of the slag scraper arm. /O status signal, and directly controls a series of actions such as lifting, telescoping, pitching and rotation of the slagging machine; automatic slagging control unit, used for automatic control of molten iron slagging operation; automatic tipping control unit, used for automatic control of iron ladles The tipping and righting process; the automatic movement control unit of the tilting vehicle is used to automatically control the movement of the tipping vehicle from the lifting bag position to the processing position, and from the processing position to the lifting bag position; the molten iron pretreatment process calculation and prediction unit, It is used to realize the configuration, management, parameter setting, response request and model calculation function of the production process model; the process management unit defines and configures the molten iron pretreatment production process, parameter setting and automatic control of the molten iron; through this The invention discloses an automatic control system for molten iron pretreatment, which realizes the purpose of automatic control of molten iron pretreatment. The automatic control system and the automatic control method can be used to connect various production sub-processes of molten iron pretreatment to achieve the entire process of molten iron pretreatment production. Automation minimizes operator intervention.

It is understood that the specific order or hierarchy of steps in the disclosed processes is an example of an exemplary approach. Based on design preferences, it is understood that the specific order or hierarchy of steps in the process 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 intended to be limited to the specific order or hierarchy described.

In the foregoing detailed description, various features are grouped together in single embodiments to simplify the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that embodiments of the claimed subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, this invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the Detailed Description, with each claim standing on its own as a separate preferred embodiment of this invention.

Those skilled in the art will further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments herein may be implemented as electronic hardware, computer software, or combinations thereof. 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 this functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. Skilled artisans may implement the described functionality in alternative ways for each particular application, however, such implementation decisions should not be construed as departing from the scope of the present disclosure.

The steps of the methods or algorithms described in connection with the embodiments herein may be directly embodied in hardware, software modules executed by a processor, or a combination thereof. The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage media may be located in an ASIC. The ASIC can be located in the user terminal. Of course, the processor and the storage medium may also exist in the user terminal as discrete components.

For software implementation, the technology described in this application may be implemented with modules (eg, procedures, functions, etc.) that perform the functions described in this application. These software codes may be stored in a memory unit and executed by the processor. The memory unit may be implemented within the processor or external to the processor, in which case it is communicatively coupled to the processor via various means, all of which are well known in the art.

The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for describing the above embodiments, but those of ordinary skill in the art will recognize that the various embodiments can be further combined and arranged. 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, to the extent that the term "comprises" is used in the description or claims, the word is encompassed in a manner similar to the term "includes," as if "comprises," is interpreted as a connective in the claims. Furthermore, any term "or" used in the description of the claims is intended to mean "a non-exclusive or".

Claims

An automatic control system for molten iron pretreatment, which is characterized by including: molten iron pretreatment PLC, molten iron pretreatment HMI, slag removal machine PLC, automatic slag removal control unit, automatic tipping control unit, and tilting car automatic travel control unit. Molten iron pretreatment process calculation and prediction unit and process flow management unit; including:

The molten iron pretreatment PLC is used to collect the I/O status signals of the equipment in the molten iron pretreatment station, and directly output signals to control the start, stop and switch actions of the molten iron pretreatment equipment;

The molten iron pretreatment HMI is used for operators to visually monitor the equipment status, process parameters, energy medium consumption, interlocking signals, alarm information, and data history curves in the molten iron pretreatment station. It is also used to provide an interface for operators to report to the molten iron pretreatment PLC. Issue equipment action instructions; provide an interface for operators to input equipment action or system operation setting parameters;

The PLC of the slag scraper is used to collect the I/O status signals of the lifting height of the molten iron slag scraper, the telescopic length, pitch angle, and rotation angle of the slag scraper arm, and directly control a series of actions such as lifting, telescoping, pitching, and rotation of the slag scraper;

The automatic slagging control unit is used for the automatic control of molten iron slagging operations. The unit includes various sensors required for automatic slagging control, several cameras, and an automatic slagging control server. Among them, a series of detection of automatic slagging , analysis and control models run on the automatic slag removal server;

The automatic tipping control unit is used to automatically control the tipping and righting process of the iron ladle; the unit includes various sensors required for automatic tipping control, several cameras, and the automatic tipping control server; among them, the automatic tipping control unit A series of detection, analysis and control models are run on the automatic tipping server;

The automatic travel control unit of the tipper is used to automatically control the travel process of the tipper from the lifting bag position to the processing position, and from the processing position to the lifting bag position. This unit includes various sensors and several cameras required for automatic travel control. and an automatic walking control server; among which, a series of detection, analysis and control models for automatic walking are run on the automatic walking control server;

The molten iron pretreatment process calculation and prediction unit is used to realize the configuration, management, parameter setting, response request and model calculation functions of the production process model. This unit includes a process calculation and prediction server. The software system of the production process model is used in process calculation and Run on prediction server;

The process management unit defines and configures the molten iron pretreatment production process, sets parameters and automatically controls the molten iron; this unit includes a process management server and a monitoring terminal, in which the process management software runs on the process management server and monitors The terminal provides a human-machine operation interface for monitoring the entire production process, manually sending control instructions, defining and configuring parameters, viewing information, and confirming instructions.
An automatic control system for molten iron pretreatment as claimed in claim 1, characterized in that the product production process flow definition and configuration unit defines and configures the molten iron pretreatment production process, including: defining molten iron pretreatment production The basic steps of the process, among which, the basic steps at least include: the molten iron tipping car enters the station, the molten iron temperature is measured and sampled, the iron ladle is tipped, the iron ladle is returned to the right position, the mixing head is lowered and stirred, feeding, the mixing head is thrown away and lifted Arrive at the standby position, lower the spray gun into the molten iron, raise the spray gun to the standby position, remove slag from the molten iron, and then walk out of the station with the molten iron tipper.
An automatic control system for molten iron pretreatment as claimed in claim 1, characterized in that the product production process flow definition and configuration unit defines and configures the molten iron pretreatment production process, and further includes: defining basic steps and The association of basic operations, defining the association between basic steps and the molten iron pretreatment process production process model, and defining the execution sequence and execution conditional logic of basic operations, production process models.
An automatic control system for molten iron pretreatment as claimed in claim 1, characterized in that the product production process flow definition and configuration unit defines and configures the molten iron pretreatment production process, and further includes: according to different products of the steel plant , the actual needs of different production rhythms, select multiple basic steps for combined configuration, and define a variety of preconfigured process production processes corresponding to different products and different production rhythms.
An automatic control system for molten iron pretreatment as claimed in claim 1, characterized in that the process management unit obtains the current production variety plan, variety indicators, production rhythm requirements, molten iron composition, molten iron temperature, molten iron weight, molten iron The in-place signal is used to automatically control the molten iron pretreatment of the iron ladle according to the defined and configured process flow. The control process includes:

S201. The process flow management unit automatically selects the corresponding preconfigured process production control process according to the production variety plan, variety index, and production rhythm information of the current product;

S202. The process management unit uses the iron ladle in place signal or other signals as the control process start signal; after receiving the above signal, the system automatically starts the molten iron pretreatment production process control and produces according to the preconfigured process selected in S201 operation. The basic step definition and operation sequence of the control process, automatic interaction and control of the tipper automatic travel control unit, process calculation and prediction unit, molten iron pretreatment PLC, automatic tipping control unit, automatic slag removal control unit and slag removal machine PLC According to the process execution, the production process operation of molten iron pretreatment is carried out until the control of the preconfigured process flow is completed.
An automatic control system for molten iron pretreatment as claimed in claim 5, characterized in that, in S202, before the process flow management unit starts the automatic production process control, the iron ladles to be pretreated need to be lifted by a crane. After arriving at the molten iron dump truck, the process management unit receives the production variety plan, variety indicators, production rhythm requirements, molten iron composition, molten iron temperature, and molten iron weight data sent by the secondary information unit.
An automatic control system for molten iron pretreatment as claimed in claim 5, characterized in that the production process model in the process calculation and prediction unit includes an operating stirring depth and speed control model, a pretreatment time optimization model and a feeding model, By running the mixing depth and speed control model, preprocessing time optimization model and feeding model, the optimal insertion depth of the mixing head, mixing speed curve, mixing duration, optimal feeding time and optimal feeding amount parameters are calculated.
An automatic control system for molten iron pretreatment as claimed in claim 5, characterized in that, according to the actual needs of different products and different rhythms of production in the steel plant, each production step in the S202 operation can be exited, paused and skipped. operate.