Blast furnace bottom weighing-free molten iron one-tank system dynamic regulation and control method

Abstract

The invention relates to a one-tank system dynamic regulation and control method for weighing-free molten iron under a blast furnace. The method comprises the following specific steps: acquiring information; iron receiving and weighing; calculating the weight of clean molten iron; information pushing and demand determination; molten iron weight fluctuation; the molten iron blending operation process is refined; and monitoring and recording the deployment process. The method has the beneficial effects that compared with an original process that all molten iron is firstly added into an iron mixer and then is added into a converter through a ladle, after the method is implemented, only more than 45t of molten iron in each tank needs to be added into another molten iron tank and is directly added into the converter, so that the secondary iron adding amount is reduced by more than 95%, and the production cost is reduced; according to the method, the heat loss and secondary dust raising pollution risk of the molten iron in the iron mixing process of the metal mixer can be effectively reduced, the heat utilization rate of the molten iron is greatly increased, finally, the scrap steel ratio of converter steelmaking is increased, carbon emission per ton of steel is reduced, and the heat balance control precision of converter smelting is remarkably improved.

Description

Technical Field

[0001] The invention relates to a dynamic control method for a molten iron one-pot system, and in particular to a dynamic control method for a molten iron one-pot system without weighing under a blast furnace. Background Art

[0002] The "one-pot molten iron" production model means that after the molten iron is produced in the blast furnace ironmaking process, it is directly loaded into the molten iron tank and transported to the steel plant without going through the intermediate tank pouring link. In the steelmaking process, there is no need to pour the tank again to add iron, and it is directly poured into the converter for smelting.

[0003] This model has significant advantages: on the one hand, it can effectively reduce the heat loss and secondary dust pollution risk of molten iron during the iron adding process in traditional mixing furnaces, greatly improve the heat utilization rate of molten iron, thereby increasing the scrap steel ratio of converter steelmaking and reducing carbon emissions per ton of steel; on the other hand, it can significantly simplify the production process, reduce the equipment, energy consumption and operating costs required for intermediate links such as mixing furnaces, improve production efficiency, and provide strong support for steel companies to achieve efficient production and sustainable development.

[0004] However, some blast furnaces are not equipped with molten iron floor scales, and only track scales are set up on the transportation track between the blast furnace process and the converter process as the basis for molten iron weight settlement. Since the weight of molten iron cannot be accurately measured in the iron-bearing link of the blast furnace of the ironmaking plant, the actual weight of the molten iron after being transported to the steelmaking plant often does not meet the loading system requirements of the steelmaking converter, and the iron addition operation cannot be carried out directly. At this time, the conventional operation is to add all the molten iron to the mixing furnace for temporary storage, and then according to the needs of the converter smelting, the required weight of molten iron is added from the mixing furnace to the molten iron tank, and finally it is lifted to the converter for iron addition using a metallurgical crane. This secondary iron addition process not only causes additional heat loss and dust pollution, but also makes the advanced production model of "molten iron in one tank" difficult to apply in practice. It has become a key bottleneck restricting steel companies from further improving production efficiency and economic benefits. Therefore, there is an urgent need for a dynamic control method of molten iron in one tank without weighing under the blast furnace. Summary of the Invention

[0005] The purpose of the present invention is to address the shortcomings and defects in the prior art and provide a dynamic control method for a one-pot molten iron system under a blast furnace without weighing. Compared with the original process of first adding all the molten iron into a mixing furnace and then into a converter through a ladle, after the implementation of the present invention, each pot of molten iron only needs to add the part exceeding 45t into another molten iron pot and directly into the converter, thereby reducing the secondary iron addition amount by more than 95%. This method can effectively reduce the heat loss of molten iron in the process of adding iron in the mixing furnace and the risk of secondary dust pollution, greatly improve the heat utilization rate of molten iron, and ultimately increase the scrap steel ratio of converter steelmaking, reduce carbon emissions per ton of steel, and significantly improve the heat balance control accuracy of converter smelting.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a dynamic control method of a molten iron tank system without weighing under a blast furnace, which includes the following specific steps: information acquisition: including the return of empty tanks and preparation for weighing on a track scale, obtaining the tank number and information by radio frequency identification technology and sending them to the molten iron intelligent scheduling system in real time; iron receiving and weighing: including the empty tank iron receiving operation and transportation, full tank weighing operation and data transmission and storage; net molten iron weight calculation: including tank number information matching, molten iron weight calculation and verification and application of calculation results; information push and demand determination: including information push, converter demand determination and information sharing and coordination; molten iron weight fluctuation; molten iron blending operation process refinement; blending process monitoring and recording.

[0007] Furthermore, the information acquisition is specifically as follows: empty tank return and track scale weighing preparation: when the empty tank that has been emptied of molten iron completes the previous round of molten iron transportation task, it returns to the ironmaking blast furnace area along the preset transportation track, ready to receive molten iron again, and the empty tank slowly enters the track scale weighing area at a stable speed. The weighing sensor of the track scale will sense the pressure exerted by the empty tank in real time and convert the pressure signal into an electrical signal. After amplification, filtering and related processing, these electrical signals are transmitted to the data processing unit of the weighing system. The data processing unit converts the electrical signal into the weight data of the empty tank according to the preset algorithm and calibration parameters. During the weighing process, the system will perform multiple sampling and averaging calculations to improve the accuracy of the weight data; radio frequency identification technology to obtain the tank number: when the empty tank enters the track scale weighing area, the tank number of the empty tank is obtained with the help of advanced radio frequency identification technology. Each empty tank is installed with a unique electronic tag, which stores the tank number, production date, maintenance To record and related information, the reader sends a radio frequency signal to the electronic tag through the antenna to activate the electronic tag. After receiving the radio frequency signal, the electronic tag sends the information stored in it back to the reader by backscattering. After receiving the information returned by the electronic tag, the reader decodes and processes it to extract the tank number information. In order to ensure the accuracy of the tank number information, the reader will perform multiple readings and verifications. At the same time, the system will compare the read tank number with the tank number information pre-stored in the database to verify its legitimacy; the information is sent to the molten iron intelligent scheduling system in real time: after obtaining the weight data and tank number information of the empty tank, the system will send this information to the molten iron intelligent scheduling system in real time through wired or wireless communication. During the data transmission process, encryption technology is used to encrypt the data to ensure the security and integrity of the data. After receiving the data, the molten iron intelligent scheduling system will store it in the database and perform preliminary analysis and processing.

[0008] Furthermore, the iron receiving and weighing are specifically as follows: empty tank iron receiving operation and transportation: after the empty tank is weighed in the blast furnace, it will be transported to the taphole position of the blast furnace, ready to receive molten iron. After arriving at the taphole position, the operator will dock the empty tank with the taphole to ensure that the molten iron can flow smoothly into the tank; full tank weighing operation: after the empty tank completes the iron receiving operation, it will be transported to the track scale for weighing again. The operation process of full tank weighing is the same as that of empty tank weighing. During the weighing process, the system will monitor the weight changes of the full tank in real time. When the weight is stable, the weight data of the full tank of molten iron will be recorded. At the same time, the system will automatically associate the data with the previously recorded empty tank weight data to form a complete record of the molten iron tank weight information; data transmission and storage: after the full tank molten iron weight data is obtained, it will be transmitted to the molten iron intelligent scheduling system through the same communication method as the empty tank information. After the system receives the data, it will store it in the database and associate it with the empty tank weight data, tank number information and related information. The system can query and analyze the weight information of each molten iron tank in different states at any time, providing data support for subsequent net molten iron weight calculations and related decisions.

[0009] Furthermore, the net molten iron weight calculation is specifically as follows: Tank number information matching: After receiving the weight data of empty and full tanks and the tank number information, the molten iron intelligent scheduling system will first match the tank number information. Based on the uniqueness of the tank number, the system will associate the empty tank weight and full tank weight data of the same tank number. During the matching process, the system will perform strict verification to ensure the accuracy of the matching; Net molten iron weight calculation: After completing the tank number information matching, the system will calculate the net molten iron weight of the corresponding tank number according to the preset calculation formula. During the calculation process, the system will perform precision control on the calculation result to ensure the accuracy of the calculation result; Calculation result verification and application: After calculating the net molten iron weight, the system will verify the calculation result. The verified net molten iron weight data will serve as an important basis for subsequent molten iron allocation and converter production.

[0010] Furthermore, the calculation formula is: Net molten iron weight = Full tank molten iron weight - Empty tank weight, and the system will automatically calculate each tank number and record the calculation results as W1, W2, W3...W n .

[0011] Furthermore, the information push and demand determination are specifically as follows: Information push: The molten iron intelligent scheduling system will promptly push the tank number, net weight of molten iron and related information sent by the same locomotive to the converter process to the converter process. During the information push process, the system will select the appropriate push method and frequency according to the needs and receiving capacity of the converter process; Converter demand determination: After the converter process receives the information pushed by the molten iron intelligent scheduling system, it will determine the required molten iron weight Wt of the converter in combination with the actual production situation, which is in the range of 45t±0.5t. When determining the weight of the molten iron, the converter process will consider multiple factors, including the capacity of the converter, the production plan, and the composition of the molten iron; Information sharing and coordination, the blast furnace and converter processes realize information sharing, so that the converter process can reasonably arrange the molten iron consumption according to its own needs. At the same time, the blast furnace process can also adjust the iron-making plan and molten iron allocation plan according to the needs of the converter process.

[0012] Furthermore, the molten iron weight fluctuations are as follows: The amount of molten iron tapped from the blast furnace fluctuates significantly each time, primarily due to changes in internal furnace conditions, fluctuations in raw material quality, and adjustments to operating parameters. After the molten iron is filled to a full ladle, the ladle is replaced by a swinging spout, with seven ladles tapped at a time and then transported to the converter via locomotive. Due to varying degrees of corrosion resistance in the ladle materials, the net weight of a full ladle fluctuates between 47 and 53 tons, with the weight of the final ladle varying. The intelligent molten iron dispatching system monitors and analyzes the net weight of each ladle in real time. The system sets reasonable fluctuation ranges and warning thresholds. If the net weight exceeds this normal fluctuation range, the system issues a warning message, which is then sent to relevant operators and managers, prompting them to take timely action.

[0013] Furthermore, the molten iron mixing operation process is detailed as follows: After the molten iron is transported to the converter process, the first step is to prepare for the pouring station. The operator will use a metallurgical crane to lift an empty can onto the scale at the pouring station, calibrate and debug the scale to ensure its weighing accuracy, and check whether the dust removal equipment at the pouring station is operating normally. The first can of molten iron is lifted to the top of the pouring station, and by controlling the height of the small hook of the metallurgical crane, some molten iron is added to the empty can. The weight of the added iron is W1-45. During the iron addition process, the operator must pay close attention to the display data of the scale, control the speed and weight of the iron addition, and stop the iron addition when the weight of the added molten iron reaches W1-45. The first can of molten iron is lifted and added to the converter: The first can of molten iron is lifted to the converter using a metallurgical crane and slowly added to the converter. During the addition process, care must be taken to control the addition speed to avoid splashing of the molten iron. At the same time, the converter operator should pay close attention to the reaction in the converter and adjust the operating parameters in time; the subsequent tanks of molten iron are allocated and judged: the weight of the tank of molten iron at the tank pouring station is judged again. If it is still less than 45t, continue to add part of the molten iron from the second tank into the tank. The weight of the added weight is W2-45. After adding each tank of molten iron, the weight of the tank of molten iron must be re-judged. If the weight is still less than 45t, continue to add the molten iron from the subsequent tank. When the weight reaches 45t, stop adding iron to the tank; lift the tank of molten iron that reaches 45t and add it into the converter. At the same time, lift the empty tank to the scale at the tank pouring station to continue receiving iron. Repeat the above steps until the molten iron in all molten iron tanks is allocated according to the converter requirements.

[0014] Furthermore, the monitoring and recording of the mixing process are specifically as follows: during the entire molten iron mixing process, a dedicated person should be arranged to monitor and record. The monitoring personnel should pay close attention to the operating status of the equipment, the flow of molten iron and the operating specifications of the operators. The recording personnel should record in detail the weight of each tank of molten iron, the mixing time, the equipment operating parameters and related information for subsequent tracing and analysis.

[0015] After adopting the above technical scheme, the beneficial effect of the present invention is: compared with the original process of first adding all the molten iron into the mixing furnace and then adding it to the converter through the molten iron ladle, after the implementation of the present invention, each tank of molten iron only needs to add the part exceeding 45t into another molten iron tank and directly add it to the converter, thereby reducing the secondary iron addition amount by more than 95%. This method can effectively reduce the heat loss and secondary dust pollution risk of molten iron in the process of adding iron in the mixing furnace, greatly improve the heat utilization rate of molten iron, and ultimately increase the scrap steel ratio of converter steelmaking, reduce carbon emissions per ton of steel, and significantly improve the heat balance control accuracy of converter smelting. DETAILED DESCRIPTION

[0016] The technical solution adopted in this specific implementation method is: it includes the following specific steps: S1, information acquisition, specifically: 1) Empty tank return and track scale weighing preparation: When the empty tank that has been emptied of molten iron completes the previous round of molten iron transportation task, it returns to the ironmaking blast furnace area along the preset transportation track to prepare to receive molten iron again. The empty tank slowly enters the track scale weighing area at a steady speed. The weighing sensor of the track scale will sense the pressure exerted by the empty tank in real time and convert the pressure signal into an electrical signal. After amplification and filtering, these electrical signals are transmitted to the data processing unit of the weighing system. The data processing unit converts the electrical signal into the weight data of the empty tank according to the preset algorithm and calibration parameters. During the weighing process, the system will perform multiple sampling and averaging calculations to improve the accuracy of the weight data. 2) Radio Frequency Identification Technology to Obtain Tank Number: When an empty tank enters the weighing area of ​​the track scale, the tank number of the empty tank is obtained with the help of advanced Radio Frequency Identification Technology (RFID). The Radio Frequency Identification Technology (RFID) system consists of an electronic tag, a reader and an antenna. Each empty tank is installed with a unique electronic tag, which stores the tank number, production date, maintenance record and related information of the tank. The reader sends a radio frequency signal to the electronic tag through the antenna to activate the electronic tag. After receiving the radio frequency signal, the electronic tag sends the information stored in it back to the reader by backscattering. After receiving the information returned by the electronic tag, the reader decodes and processes it to extract the tank number information. To ensure the accuracy of the tank number information, the reader will perform multiple readings and verifications. At the same time, the system will compare the read tank number with the tank number information pre-stored in the database to verify its legitimacy. If the tank number information is legal, the system will associate the tank number with the empty tank weight data currently weighed; if the tank number information is illegal, the system will issue an alarm to prompt the operator to intervene manually. 3) Real-time information transmission to the molten iron intelligent dispatching system: After obtaining the empty tank weight data and tank number information, the system transmits this information to the molten iron intelligent dispatching system in real time via wired or wireless communication. During data transmission, encryption technology is used to ensure data security and integrity. After receiving the data, the molten iron intelligent dispatching system stores it in a database and performs preliminary analysis and processing. For example, the system performs statistical analysis on the empty tank weight data, calculating statistical quantities such as the mean and standard deviation to promptly detect abnormal changes in the empty tank weight.

[0017] S2, receiving iron and weighing, specifically: 1) Empty can iron receiving and transportation: After being weighed in the blast furnace, the empty can is transported to the taphole of the blast furnace to receive molten iron. During transportation, the transport vehicle will maintain a stable speed and driving state to prevent the residual molten iron in the empty can from splashing out due to bumps or sudden braking. After arriving at the taphole, the operator will dock the empty can with the taphole to ensure that the molten iron can flow smoothly into the can; 2) Full tank weighing operation: After the empty tank completes the iron-receiving operation, it will be transported to the track scale for weighing again. The operation process of full tank weighing is the same as that of empty tank weighing. Due to the large weight of the full tank, the weighing process must ensure that the load-bearing capacity of the track scale is sufficient, and the weighing system must be calibrated and debugged more strictly. When the full tank enters the weighing area of ​​the track scale, the driving speed must be controlled to avoid increasing the weighing error due to excessive speed. During the weighing process, the system will monitor the weight change of the full tank in real time. When the weight is stable, the weight data of the full tank of molten iron will be recorded. At the same time, the system will automatically associate the data with the previously recorded empty tank weight data to form a complete record of the molten iron tank weight information; 3) Data transmission and storage: After the full tank weight data is acquired, it will be transmitted to the molten iron intelligent scheduling system through the same communication method as the empty tank information. After the system receives the data, it will store it in the database and associate it with the empty tank weight data, tank number information and related information. The system can query and analyze the weight information of each molten iron tank in different states at any time, providing data support for subsequent net molten iron weight calculations and related decisions.

[0018] S3, calculation of net molten iron weight, specifically: 1) Tank number information matching: After receiving the weight data of empty and full tanks and the tank number information, the molten iron intelligent scheduling system will first match the tank number information. Based on the uniqueness of the tank number, the system will associate the empty and full tank weight data of the same tank number. During the matching process, the system will perform strict verification to ensure the accuracy of the matching. If the tank number information does not match or the data is abnormal, the system will issue an alarm and prompt the operator to conduct manual verification; 2) Calculation of net molten iron weight: After completing the tank number information matching, the system will calculate the net molten iron weight of the corresponding tank number according to the preset calculation formula. During the calculation process, the system will perform precision control on the calculation results to ensure the accuracy of the calculation results. The calculation formula is: Net molten iron weight = full tank molten iron weight - empty tank weight. The system will automatically calculate for each tank number and record the calculation results as W1, W2, W3...W n ; 3) Verification and Application of Calculation Results: After calculating the net molten iron weight, the system verifies the result. For example, the system compares the result with historical data to analyze its rationality. If any abnormality is found, the system will rematch and recalculate the data or prompt the operator for manual review. The verified net molten iron weight data will serve as an important basis for subsequent molten iron allocation and converter production.

[0019] S4, information push and demand determination, specifically: 1) Information push: The intelligent hot metal dispatching system will promptly push the tank number, net weight of hot metal, and other related information sent by the locomotive to the converter process. During this information push process, the system will select the appropriate push method and frequency based on the needs and receiving capacity of the converter process. For example, the system can send information directly to the production management system of the converter process via a network communication protocol, or notify relevant operators via SMS or email. 2) Determining converter requirements: After receiving information pushed by the molten iron intelligent scheduling system, the converter process will determine the required molten iron weight Wt of the converter based on actual production conditions, which is within the range of 45t±0.5t. When determining the molten iron weight, the converter process will consider multiple factors, including the converter capacity, production plan, and molten iron composition. For example, if the converter is undergoing high-intensity production tasks, the molten iron weight may need to be increased; if the molten iron composition does not meet the requirements, the molten iron weight may need to be adjusted. 3) Information Sharing and Coordination: The blast furnace and converter processes share information, enabling the converter process to rationally arrange molten iron usage based on its own needs. Simultaneously, the blast furnace process can adjust its tapping schedule and molten iron allocation plan based on the converter process's needs. For example, if the converter process reports a high demand for molten iron, the blast furnace process can appropriately increase the tapping volume or adjust the tapping rhythm. If the converter process reports issues with molten iron quality, the blast furnace process can promptly take measures to improve them.

[0020] S5, molten iron weight fluctuation, specifically: 1) The amount of hot metal tapped from the blast furnace fluctuates significantly each time. This is primarily due to changes in internal furnace conditions, fluctuations in raw material quality, and adjustments to operating parameters. After the molten iron is filled to a full ladle, the ladle is replaced by a swinging spout. Seven ladlefuls of hot metal are tapped each time and then transported to the converter via locomotive. Due to varying degrees of corrosion resistance in the ladle material, the net weight of the full ladle fluctuates between 47 and 53 tons, and the weight of the final ladle varies. 2) The intelligent molten iron dispatching system will monitor and analyze the net molten iron weight of each molten iron trip in real time. The system will set a reasonable fluctuation range and warning threshold. When the net molten iron weight exceeds the normal fluctuation range, the system will promptly issue a warning message, which will be sent to relevant operators and managers to remind them to take timely measures to deal with it.

[0021] S6, refinement of the molten iron mixing operation process, specifically: 1) After the molten iron is transported to the converter process, the first step is to prepare the tank dumping station. The operator will use a metallurgical crane to lift an empty tank to the tank dumping station scale, calibrate and debug the scale to ensure its weighing accuracy, and at the same time, check whether the dust removal equipment at the tank dumping station is operating normally; 2) First Can of Iron: Lift the first can of molten iron to the top of the canister dumping station. By controlling the height of the metallurgical crane's small hook, some of the molten iron is poured into the empty canister. The weight of the added iron is W1-45. During the iron pouring process, the operator must closely monitor the display data on the floor scale to control the speed and weight of the iron pouring. When the weight of the molten iron reaches W1-45, the iron pouring is stopped. 3) Lifting the first molten iron and adding it to the converter: Use a metallurgical crane to lift the first molten iron to the converter and slowly add it to the converter. During the addition process, pay attention to controlling the addition speed to avoid splashing. At the same time, the converter operator should pay close attention to the reaction situation in the converter and adjust the operating parameters in time; 4) Allocation and judgment of subsequent molten iron tanks: The weight of the molten iron tank at the tank pouring station is re-judged. If it is still less than 45t, part of the molten iron from the second tank is continued to be added to the tank. The weight of the added weight is W2-45. After each tank of molten iron is added, the weight of the molten iron tank is re-judged. If the weight is still less than 45t, the molten iron from the subsequent tank is continued to be added. When the weight reaches 45t, the molten iron addition to the tank is stopped. 5) The molten iron in the tank that has reached 45t is lifted and added to the converter. At the same time, the empty tank is lifted to the tank unloading station and placed on the scale to continue receiving iron. The above steps are repeated until the molten iron in all the tanks is mixed according to the converter requirements.

[0022] S7, deployment process monitoring and recording, specifically: During the entire molten iron mixing process, dedicated personnel should be arranged to monitor and record. The monitoring personnel should pay close attention to the operating status of the equipment, the flow of molten iron and the operating specifications of the operators. The recorders should record in detail the weight of each tank of molten iron, mixing time, equipment operating parameters and related information for subsequent traceability and analysis.

[0023] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for dynamically controlling molten iron in a single tank under a blast furnace without weighing, characterized in that: It includes the following specific steps: S1, information acquisition: including the return of empty tanks and preparation for weighing on the track scale, obtaining the tank number using radio frequency identification technology, and sending the information to the molten iron intelligent scheduling system in real time; S2, iron receiving and weighing: including iron receiving and transportation of empty tanks, weighing operations of full tanks, and data transmission and storage; S3, net molten iron weight calculation: including tank number information matching, molten iron weight calculation and calculation result verification and application; S4, information push and demand determination: including information push, converter demand determination, and information sharing and coordination; S5, molten iron weight fluctuation; S6, refinement of molten iron mixing operation process; S7, monitoring and recording of the deployment process.

2. The method for dynamic control of molten iron in one tank without weighing under a blast furnace according to claim 1, characterized in that: The S1 is specifically: 1) Empty tank return and track scale weighing preparation: When the empty tank that has been emptied of molten iron completes the previous round of molten iron transportation task, it returns to the ironmaking blast furnace area along the preset transportation track to prepare to receive molten iron again. The empty tank slowly enters the track scale weighing area at a steady speed. The weighing sensor of the track scale will sense the pressure exerted by the empty tank in real time and convert the pressure signal into an electrical signal. After amplification and filtering, these electrical signals are transmitted to the data processing unit of the weighing system. The data processing unit converts the electrical signal into the weight data of the empty tank according to the preset algorithm and calibration parameters. During the weighing process, the system will perform multiple sampling and averaging calculations to improve the accuracy of the weight data. 2) Obtaining the tank number using radio frequency identification technology: When an empty tank enters the weighing area of ​​a track scale, the tank number of the empty tank is obtained with the help of advanced radio frequency identification technology. Each empty tank is installed with a unique electronic tag, which stores the tank number, production date, maintenance record and related information. The reader sends a radio frequency signal to the electronic tag through the antenna to activate the electronic tag. After receiving the radio frequency signal, the electronic tag sends the information stored in it back to the reader by backscattering. After receiving the information returned by the electronic tag, the reader decodes and processes it to extract the tank number information. To ensure the accuracy of the tank number information, the reader will perform multiple readings and verifications. At the same time, the system will compare the read tank number with the tank number information pre-stored in the database to verify its legitimacy. 3) Information is sent to the molten iron intelligent scheduling system in real time: After obtaining the weight data and tank number information of the empty tank, the system will send this information to the molten iron intelligent scheduling system in real time through wired or wireless communication. During the data transmission process, encryption technology is used to encrypt the data to ensure the security and integrity of the data. After receiving the data, the molten iron intelligent scheduling system will store it in the database and perform preliminary analysis and processing.

3. The method for dynamic control of molten iron in one tank without weighing under a blast furnace according to claim 1, characterized in that: The S2 is specifically: 1) Empty can iron receiving and transportation: After the empty can is weighed in the blast furnace, it will be transported to the taphole of the blast furnace to receive molten iron. After arriving at the taphole, the operator will connect the empty can with the taphole to ensure that the molten iron can flow smoothly into the can; 2) Full tank weighing operation: After the empty tank completes the iron-receiving operation, it will be transported to the track scale for re-weighing. The operation process of full tank weighing is the same as that of empty tank weighing. During the weighing process, the system will monitor the weight changes of the full tank in real time. When the weight stabilizes, the weight data of the full tank of molten iron will be recorded. At the same time, the system will automatically associate this data with the previously recorded empty tank weight data to form a complete record of the molten iron tank weight information; 3) Data transmission and storage: After the full tank weight data is acquired, it will be transmitted to the molten iron intelligent scheduling system through the same communication method as the empty tank information. After the system receives the data, it will store it in the database and associate it with the empty tank weight data, tank number information and related information. The system can query and analyze the weight information of each molten iron tank in different states at any time, providing data support for subsequent net molten iron weight calculations and related decisions.

4. The method for dynamic control of molten iron in one tank under a blast furnace without weighing according to claim 1, characterized in that: The S3 is specifically: 1) Tank number information matching: After receiving the weight data of empty and full tanks and the tank number information, the molten iron intelligent scheduling system will first match the tank number information. Based on the uniqueness of the tank number, the system will associate the empty tank weight and full tank weight data of the same tank number. During the matching process, the system will perform strict verification to ensure the accuracy of the matching; 2) Net molten iron weight calculation: After completing the tank number information matching, the system will calculate the net molten iron weight of the corresponding tank number according to the preset calculation formula. During the calculation process, the system will perform precision control on the calculation results to ensure the accuracy of the calculation results; 3) Verification and application of calculation results: After calculating the net molten iron weight, the system will verify the calculation results. The net molten iron weight data after verification will serve as an important basis for subsequent molten iron allocation and converter production.

5. The method for dynamic control of molten iron in one tank without weighing under a blast furnace according to claim 4, characterized in that: The calculation formula in step 2 is: Net molten iron weight = full tank molten iron weight - empty tank weight, and the system will automatically calculate each tank number and record the calculation results as W1, W2, W3...W n .

6. The method for dynamic control of molten iron in one tank without weighing under a blast furnace according to claim 1, characterized in that: The S4 is specifically: 1) Information push: The molten iron intelligent dispatching system will promptly push the tank number, net weight of molten iron, and related information of the same locomotive to the converter process. During the information push process, the system will select the appropriate push method and frequency based on the needs and receiving capacity of the converter process; 2) Determining converter requirements: After receiving information pushed by the molten iron intelligent scheduling system, the converter process will determine the required molten iron weight Wt of the converter based on actual production conditions, within the range of 45t ± 0.5t. When determining the molten iron weight, the converter process considers multiple factors, including converter capacity, production plan, and molten iron composition. 3) Information sharing and coordination: The blast furnace and converter processes share information, so that the converter process can reasonably arrange the amount of molten iron according to its own needs. At the same time, the blast furnace process can also adjust the iron-making plan and molten iron allocation plan according to the needs of the converter process.

7. The method for dynamic control of molten iron in one tank under a blast furnace without weighing according to claim 1, characterized in that: The S5 is specifically: 1) The amount of hot metal tapped from the blast furnace fluctuates significantly each time. This is primarily due to changes in internal furnace conditions, fluctuations in raw material quality, and adjustments to operating parameters. After the molten iron is filled to a full ladle, the ladle is swapped out using a swinging spout. Seven ladlefuls of hot metal are tapped each time and then transported to the converter via a locomotive. This constitutes one trip of hot metal. Due to varying degrees of corrosion resistance in the ladle materials, the net weight of the full ladle fluctuates between 47 and 53 tons, and the weight of the final ladle varies. 2) The intelligent molten iron dispatching system will monitor and analyze the net molten iron weight of each molten iron trip in real time. The system will set a reasonable fluctuation range and warning threshold. When the net molten iron weight exceeds the normal fluctuation range, the system will promptly issue a warning message, which will be sent to relevant operators and managers to remind them to take timely measures to deal with it.

8. The method for dynamic control of molten iron in one tank without weighing under a blast furnace according to claim 1, characterized in that: The S6 is specifically: 1) After the molten iron is transported to the converter process, the first step is to prepare the tank dumping station. The operator will use a metallurgical crane to lift an empty tank to the tank dumping station scale, calibrate and debug the scale to ensure its weighing accuracy, and at the same time, check whether the dust removal equipment at the tank dumping station is operating normally; 2) First Can of Iron: Lift the first can of molten iron to the top of the canister dumping station. Control the height of the small hook of the metallurgical crane to pour some of the molten iron into the empty canister. The weight of the molten iron poured in is W1-45. During the pouring process, the operator must pay close attention to the display data of the floor scale and control the speed and weight of the pouring. When the weight of the molten iron reaches W1-45, the pouring is stopped. 3) Lifting the first pot of molten iron and adding it to the converter: Use a metallurgical crane to lift the first pot of molten iron to the converter and slowly add it into the converter. During the addition process, pay attention to controlling the addition speed to avoid splashing of molten iron. At the same time, the converter operator should pay close attention to the reaction situation in the converter and adjust the operating parameters in time; 4) Allocation and judgment of subsequent molten iron tanks: The weight of the molten iron tank at the tank pouring station is re-judged. If it is still less than 45t, part of the molten iron from the second tank is continued to be added to the tank. The weight of the added weight is W2-45. After each tank of molten iron is added, the weight of the molten iron tank is re-judged. If the weight is still less than 45t, the molten iron from the subsequent tank is continued to be added. When the weight reaches 45t, the molten iron addition to the tank is stopped. 5) The molten iron in the tank that has reached 45t is lifted and added to the converter. At the same time, the empty tank is lifted to the tank unloading station and placed on the scale to continue receiving iron. The above steps are repeated until the molten iron in all the tanks is mixed according to the converter requirements.

9. The method for dynamic control of molten iron in one tank under a blast furnace without weighing according to claim 1, characterized in that: The S7 is specifically: During the entire molten iron mixing process, dedicated personnel should be arranged to monitor and record. The monitoring personnel should pay close attention to the operating status of the equipment, the flow of molten iron and the operating specifications of the operators. The recorders should record in detail the weight of each tank of molten iron, mixing time, equipment operating parameters and related information for subsequent traceability and analysis.