Automatic control method for conveying return ore and return coke of blast furnace

Abstract

The application provides a blast furnace return ore and return coke conveying automatic control method, which comprises the following steps: receiving a starting command, performing a ringing early warning for a preset time length; judging whether all belt conveyors meet the automatic starting condition after the early warning ends; if yes, starting a main circuit soft starter, judging whether the main circuit soft starter normally operates; if yes, the main circuit soft starter starts the belt conveyors in sequence from the far to the near; judging whether each belt conveyor normally operates through a safety interlocking control function; if yes, continuously maintaining the normal operation of the remaining belt conveyors; and stopping the belt conveyors in sequence from the near to the far after the belt conveyor operation time meets the set feeding time. The application realizes remote full-automatic control of the belt conveyors and has the function of one-key control; a double power automatic switching switch is applied in the system, thereby improving the equipment operation reliability; and the belt conveyors are designed to be interlocked and controlled, thereby ensuring the safety of the system operation.

Description

Technical Field

[0001] This application relates to the technical field, and in particular to an automatic control method for conveying blast furnace return ore and coke. Background Technology

[0002] During blast furnace ironmaking, raw materials such as coke and sinter should be transported to the coke and ore bins by belt conveyors according to the blast furnace charge ratio and storage time requirements. The feeding is organized according to the batch size of the blast furnace charge. During feeding, the feeder under the bins conveys the charge to a vibrating screen for screening. Charges of qualified particle size enter the weighing hopper for weighing. For returned ore and coke, the charge is transported to the returned ore bin or returned coke bin by belt conveyor or trolley, and then transported to the sintering plant or returned coke plant by belt conveyor or truck. After being weighed according to batch size in the weighing hopper, the charge is transported to the charging car or main belt conveyor by the main ore and coke supply belt conveyor, and then into the furnace. It enters the furnace along with the sinter, replacing part of the coke.

[0003] Existing enterprise return ore and coke reverse coking processes are generally completed by transporting raw materials such as coke and sinter by belt conveyor or trolley. The transfer process cannot be fully automated and requires manual intervention. Furthermore, belt conveyors may malfunction during high-intensity operation. Once a belt conveyor malfunctions, the raw materials being transported on it are prone to piling up, which can lead to production safety accidents. Summary of the Invention

[0004] This application provides an automatic control method for blast furnace return ore and coke conveying, to solve the problem that the existing enterprise return ore and coke conveying process is generally completed by transporting raw materials such as coke and sinter by belt conveyor or trolley. During the transfer, it cannot be fully automatically controlled and requires manual intervention to operate. In addition, belt conveyors may fail during high-intensity operation. Once the belt conveyor fails, the raw materials transported on it are prone to piling up, which may cause production safety accidents.

[0005] This application provides an automatic control method for conveying blast furnace return ore and coke, including:

[0006] Upon receiving the start command, ring the alarm for a preset duration;

[0007] After the warning ends, determine whether all belt conveyors meet the automatic start-up conditions;

[0008] If the conditions are met, start the main circuit soft starter and determine whether the main circuit soft starter is operating normally.

[0009] If operating normally, the main circuit soft starter starts the belt conveyors sequentially from farthest to nearest.

[0010] The safety interlock control function is used to determine whether each belt conveyor is operating normally;

[0011] If operating normally, continue to maintain the normal operation of the remaining belt conveyors;

[0012] Once the belt conveyor has been running for the set feeding time, it will be stopped sequentially from nearest to farthest.

[0013] Optional, also includes:

[0014] Start the main circuit soft starter and determine if it is operating normally.

[0015] If the main circuit soft starter fails to operate normally, the backup circuit soft starter is activated by the dual power automatic transfer switch.

[0016] The backup circuit soft starter starts the belt conveyors sequentially from farthest to nearest.

[0017] The safety interlock control function is used to determine whether each belt conveyor is operating normally;

[0018] If operating normally, continue to maintain the normal operation of the remaining belt conveyors;

[0019] Once the belt conveyor has been running for the set feeding time, it will be stopped sequentially from nearest to farthest.

[0020] Optional, also includes:

[0021] The safety interlock control function is used to determine whether each belt conveyor is operating normally;

[0022] If the operation is abnormal, stop the operation of the connected belt conveyor;

[0023] Send a stop signal to the other belt conveyors, switch the control mode to manual mode, and provide voice alarm prompts.

[0024] Optional, also includes:

[0025] After the warning ends, determine whether all belt conveyors meet the automatic start-up conditions;

[0026] If the requirements are not met, a voice alarm will be triggered.

[0027] Optionally, the main circuit soft starter may malfunction or stop in the following situations: main circuit soft starter failure.

[0028] Optionally, the dual power supply automatic transfer switch and safety interlock control function can also be controlled by a host computer.

[0029] As can be seen from the above technical solutions, this application provides an automatic control method for blast furnace return ore and coke conveying, including: receiving a start command and sounding an alarm for a preset time; after the alarm ends, determining whether all belt conveyors meet the automatic start conditions; if they do, starting the main circuit soft starter and determining whether the main circuit soft starter is operating normally; if operating normally, the main circuit soft starter starts the belt conveyors sequentially from farthest to nearest; determining whether each belt conveyor is operating normally through a safety interlock control function; if operating normally, continuing to maintain the normal operation of the remaining belt conveyors; after the belt conveyor running time meets the set feeding time, stopping the belt conveyors sequentially from nearest to farthest.

[0030] This application not only enables remote control of the blast furnace return ore and coke conveyor belts, but also provides one-button start / stop control, reducing the workload of operators. It also employs a soft-start "one-in-use, one-out-of-use" design, allowing the dual power switches to automatically switch to the backup circuit in the event of a main circuit failure, and enables remote circuit switching control, significantly improving the stability of the transmission system and the convenience of circuit switching. This application is safe and reliable. Detailed interlocking procedures are designed to link two connected conveyor belts within the same area, such as preventing the upstream conveyor from starting if the downstream conveyor fails. Two connected conveyor belts across different areas also achieve interlocking control through signal transmission, preventing material buildup and ensuring the overall safety of the system. Attached Figure Description

[0031] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 A flowchart illustrating an automatic control method for conveying blast furnace return ore and coke, provided in this application;

[0033] Figure 2 A schematic diagram of the automatic control process for the belt conveyor provided in this application;

[0034] Figure 3 A schematic diagram of the one-button start procedure for the belt conveyor provided in this application;

[0035] Figure 4 Wiring diagram of the automatic transfer switch provided in this application;

[0036] Figure 5 The interlocking procedure diagram provided in this application;

[0037] Figure 6 A schematic diagram of the communication program provided in this application. Detailed Implementation

[0038] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples consistent with some aspects of this application as detailed in the claims.

[0039] See Figure 1 The flowchart of an automatic control method for blast furnace return ore and coke conveying provided in this application includes:

[0040] Upon receiving the start command, ring the alarm for a preset duration;

[0041] In one embodiment, this application integrates a pre-start alarm bell function into the automatic program. After setting the alarm duration, each conveyor belt will automatically start after the alarm ends. The alarm bell function can prompt the operator to start the conveyor belt and remind the operator to stay away from the conveyor belt to avoid safety accidents.

[0042] See Figure 2 This is a flowchart illustrating the automatic control process of the belt conveyor provided in this application. After the warning ends, it is determined whether all belt conveyors meet the automatic start conditions.

[0043] In one embodiment, determining whether all belt conveyors meet the automatic start conditions after the warning ends is to facilitate the one-click start of all belt conveyors in this application.

[0044] In one embodiment, this application can be applied to a blast furnace return ore and coke conveying system with 22 conveyor belts. Due to the large number of equipment covering three areas: No. 1 blast furnace, No. 2 blast furnace, and sintering, and the shortage of on-site operators, this application realizes the sequential start and stop program of the 22 conveyor belts by combining multiple key signals such as conveyor belt operation feedback signal, manual / automatic switching signal, remote / local signal, start warning, start command rising edge, and rising edge hold signal.

[0045] If the conditions are met, start the main circuit soft starter and determine whether the main circuit soft starter is operating normally.

[0046] In one embodiment, this application does not cause material accumulation when the belt conveyor is started with one key, regardless of whether there is material on it. The start-up time is shorter, the idling time is reduced, the equipment wear is reduced, energy is saved, and production efficiency is improved. This reduces the labor costs and employee burden of enterprises and allows for more precise control of the belt conveyor.

[0047] In one embodiment, the high-power motor in this application adopts a soft-start "one-in-use, one-out-of-use" design to ensure the stable operation of the critical material conveyor belt. To ensure automatic power switching when one piece of equipment fails, this system uses a dual-power automatic transfer switch for the first time in a belt conveyor drive system. This enables the dual power switch to automatically switch to the standby circuit when the main circuit fails, greatly improving the stability of the drive system and the convenience of circuit switching.

[0048] If it is running normally, see Figure 3 This is a schematic diagram of the one-button start procedure for the belt conveyor provided in this application. The main circuit soft starter starts the belt conveyor sequentially from farthest to nearest.

[0049] In one embodiment, the order from far to near facilitates the transportation of raw materials, and the direction of the belt conveyor's start-up and operation is consistent with the direction of blast furnace return ore and coke conveying.

[0050] The safety interlock control function is used to determine whether each belt conveyor is operating normally;

[0051] In one embodiment, since this application requires 24-hour uninterrupted operation, in the event of tearing, misalignment, rope pulling, or electrical transmission failure of the belt conveyor, this application needs to control the system to shut down interlockingly to avoid mechanical damage, personal injury, material accumulation, and other situations. Therefore, safety hazards during operation are a key issue that needs to be addressed.

[0052] In one embodiment, this application incorporates an interlocking control design for the key alarm signals and associated status signals of the belt conveyor. When the system detects that the interlocking control conditions are not met, it promptly stops the belt conveyor, switches all controls to manual mode, and provides a voice alarm. This interlocking control design not only significantly improves the safety of the work area but also reduces the workload of the operators.

[0053] If operating normally, continue to maintain the normal operation of the remaining belt conveyors;

[0054] In one embodiment, this function enables fully automatic control of the belt conveyor, effectively addressing the shortcomings of both reverse and forward coke flow start-up methods.

[0055] Once the belt conveyor has been running for the set feeding time, it will be stopped sequentially from nearest to farthest.

[0056] In one embodiment, the belt conveyors travel in the reverse direction of blast furnace return ore and coke conveying from near to far, thus avoiding material stockpiling.

[0057] Furthermore, it also includes:

[0058] Start the main circuit soft starter and determine if it is operating normally.

[0059] See Figure 4 The above is a wiring diagram of the automatic transfer switch provided in this application. If the main circuit soft starter cannot operate normally, the backup circuit soft starter is started through the dual power supply automatic transfer switch.

[0060] In one embodiment, this application employs a soft-start method for all belt conveyors. To ensure equipment operational stability, a one-in-one backup design for the soft starters is adopted. By configuring dual power supply transfer switches at the output terminals of the two soft starters, the system can automatically switch to the backup soft starter upon detecting a soft starter failure or shutdown in the main circuit, achieving true automatic soft starter switching. When manual soft starter switching or maintenance is required, the main and backup soft starter circuits can be switched with a single button via the host computer screen or the cabinet door switch on-site, making operation convenient and simple. In addition to the above functions, real-time monitoring and display of the dual circuit positions are also implemented, allowing for real-time monitoring and selection of the main or backup circuit on-site from the host computer.

[0061] In one embodiment, the Automatic Transfer Switch (ATSE) is used for the first time in soft-start automatic transfer, truly realizing the electromechanical integration of automatic transfer function. It features voltage detection, a communication interface, and electromechanical interlocking, enabling fully automatic operation, remote control, forced reset to "0", and emergency manual operation. This maximizes the stable operation of the system and reduces the failure rate of the conveyor system and the direct economic losses caused by downtime due to malfunctions.

[0062] The backup circuit soft starter starts the belt conveyors sequentially from farthest to nearest.

[0063] In one embodiment, the backup circuit has the same starting function as the main circuit, realizing the stable operation of the belt conveyor controlled by the dual-start system.

[0064] See Figure 5 This is a schematic diagram of the interlocking procedure provided in this application, which uses the safety interlocking control function to determine whether each belt conveyor is operating normally;

[0065] If operating normally, continue to maintain the normal operation of the remaining belt conveyors;

[0066] Once the belt conveyor has been running for the set feeding time, it will be stopped sequentially from nearest to farthest.

[0067] Furthermore, it also includes:

[0068] The safety interlock control function is used to determine whether each belt conveyor is operating normally;

[0069] If the operation is abnormal, stop the operation of the connected belt conveyor;

[0070] In one embodiment, the two belt conveyors connected in the same area controlled by this application are linked together through a detailed interlocking program design. For example, if the downstream belt conveyor does not start, the upstream belt conveyor cannot start; if the downstream belt conveyor malfunctions, the upstream belt conveyor also stops running.

[0071] In one embodiment, the safety interlock control function improves the safety of the entire blast furnace return ore and coke conveying system.

[0072] See Figure 6 The diagram shows the communication program provided in this application. It sends a stop signal to the other belt conveyors, switches the control mode to manual mode, and provides a voice alarm prompt.

[0073] In one embodiment, to meet the interlocking requirements between belt conveyors connecting two different process areas, this application employs inter-PLC communication to achieve this function. An M580 program is written to write function code %M (15). In this system, the M580 acts as a Modbus TCP client to write data, and the Quantum PLC acts as a server to receive data. The IP address of the Quantum 140 PLC is set to 192.168.0.101, and the address format of ADDMX is '0.0.3{192.168.0.101}'. The OUT pin of ADDMX and the ADR pin of READ_VAR need to be connected using a link (F6). The OBJ type is selected as %M, which means writing the word address in Modbus 0 area. NUM is 0, which means that the bit address corresponding to the starting address 05999 is %M5999. The NB length is 2, which means writing the bit address 00001-0002 of the slave device. EMIS means writing the value in the address %MW800.0-%MW800.2 of M580 to the address %M5999-%M6000 of the Quantum 140 PLC.

[0074] Furthermore, it also includes:

[0075] After the warning ends, determine whether all belt conveyors meet the automatic start-up conditions;

[0076] If the requirements are not met, a voice alarm will be triggered.

[0077] In one embodiment, if the application determines that a belt conveyor does not meet the automatic start conditions after the warning ends, then all belt conveyors will not be started, and a voice alarm will be issued to prompt the operator that a fault has occurred during the start-up process and to seek manual troubleshooting.

[0078] Furthermore, the main circuit soft starter may malfunction or stop in the following situations: main circuit soft starter failure.

[0079] Furthermore, the dual power supply automatic transfer switch and safety interlock control function can also be controlled by a host computer.

[0080] In one embodiment, this application has an automatic / manual switching function, which can switch some belt conveyors out of the automatic program and perform manual start-stop control, which facilitates subsequent maintenance and repair.

[0081] In one embodiment, when manual soft-start switching or maintenance is required, the primary and backup soft-start circuits can be switched with a single click via the host computer screen or the cabinet door switch on-site, making operation convenient and simple. In addition to the above functions, real-time monitoring and display of the dual-circuit settings are also implemented, allowing for real-time monitoring and selection of the primary or backup circuit on-site via the host computer.

[0082] In one embodiment, this application also includes a reporting function. Based on on-site needs, it utilizes the IFIX and ACCESS database platforms to achieve one-click report generation through script writing. In developing the reporting function, the IFIX platform primarily uses the following controls: Microsoft Common Dialog Control Version 6.0 (file management), Microsoft Date and Time Picker Control 6.0 (date and time), Microsoft FlexGrid Control Version 6.0 (tables), and Microsoft ActiveX Date Objects 2.6.

[0083] In one embodiment, the implementation of the reporting function not only ensures the authenticity, accuracy, and timeliness of the data, but also greatly reduces the workload of workers, providing strong technical support for enterprise personnel optimization and data utilization.

[0084] This application provides an automatic control method for blast furnace return ore and coke conveying, comprising: receiving a start command and sounding an alarm for a preset duration; after the alarm ends, determining whether all belt conveyors meet the automatic start conditions; if so, starting the main circuit soft starter and determining whether the main circuit soft starter is operating normally; if operating normally, the main circuit soft starter starts the belt conveyors sequentially from farthest to nearest; determining whether each belt conveyor is operating normally through a safety interlock control function; if operating normally, continuing to maintain the normal operation of the remaining belt conveyors; after the belt conveyor running time meets the set feeding time, stopping the belt conveyors sequentially from nearest to farthest.

[0085] This application not only enables remote control of the blast furnace return ore and coke conveyor belts, but also provides one-button start / stop control, reducing the workload of operators. It also employs a soft-start "one-in-use, one-out-of-use" design, allowing the dual power switches to automatically switch to the backup circuit in the event of a main circuit failure, and enables remote circuit switching control, significantly improving the stability of the transmission system and the convenience of circuit switching. This application is safe and reliable. Detailed interlocking procedures are designed to link two connected conveyor belts within the same area, such as preventing the upstream conveyor from starting if the downstream conveyor fails. Two connected conveyor belts across different areas also achieve interlocking control through signal transmission, preventing material buildup and ensuring the overall safety of the system.

[0086] The foregoing has shown and described the basic principles and main features of this application, as well as its advantages. It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from its spirit or basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this application is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application.

[0087] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0088] Similar parts between the embodiments provided in this application can be referred to mutually. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods extended from the solution of this application without creative effort shall fall within the scope of protection of this application.

Claims

1. An automatic control method for conveying blast furnace return ore and coke, characterized in that, include: Upon receiving the start command, ring the alarm for a preset duration; After the warning ends, determine whether all belt conveyors meet the automatic start conditions; If the conditions are met, start the main circuit soft starter and determine whether the main circuit soft starter is operating normally. If operating normally, the main circuit soft starter starts the belt conveyors sequentially from farthest to nearest. The safety interlock control function is used to determine whether each belt conveyor is operating normally; If operating normally, continue to maintain the normal operation of the remaining belt conveyors; After the belt conveyor runs for the set feeding time, it is stopped sequentially from near to far. The sequence of belt conveyors from near to far is the reverse direction of blast furnace return ore and return coke conveying. Also includes: Start the main circuit soft starter and determine if it is operating normally. If the main circuit soft starter fails to operate normally, the backup circuit soft starter is activated by the dual power automatic transfer switch. The backup circuit soft starter starts the belt conveyors sequentially from farthest to nearest. The safety interlock control function is used to determine whether each belt conveyor is operating normally; If operating normally, continue to maintain the normal operation of the remaining belt conveyors; Once the belt conveyor has been running for the set feeding time, it should be stopped sequentially from nearest to farthest. Also includes: The safety interlock control function is used to determine whether each belt conveyor is operating normally; If the operation is abnormal, stop the operation of the connected belt conveyor; Send a stop signal to the other belt conveyors, switch the control mode to manual mode, and provide voice alarm prompts.

2. The automatic control method for conveying blast furnace return ore and coke according to claim 1, characterized in that, Also includes: After the warning ends, determine whether all belt conveyors meet the automatic start conditions; If the requirements are not met, a voice alarm will be triggered.

3. The automatic control method for conveying blast furnace return ore and coke according to claim 2, characterized in that, The main circuit soft starter cannot operate normally in the following situations: main circuit soft starter failure or shutdown.

4. The automatic control method for conveying blast furnace return ore and coke according to claim 2, characterized in that, The dual-power automatic transfer switch and safety interlock control functions can also be controlled by a host computer.

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