A blast furnace tapping optimization method

Abstract

The present application relates to a kind of blast furnace tapping optimization method, blast furnace tapping optimization system includes water slag integrated detection system, torpedo tank truck is matched with jar detection system, molten iron flow detection system, come slag amount detection and automatic sample taking system, molten iron automatic temperature measurement system, molten iron automatic sampling system, swing hook mouth automatic switching system and automatic scheduling and data entry system, realize the full-automatic control of blast furnace tapping process, realize the accurate loading of torpedo tank truck, effectively improve the turnover rate of blast furnace molten iron torpedo tank truck, substantially reduce the molten iron temperature drop caused by "empty load" or "less load", conducive to ironmaking production.

Description

Technical Field

[0001] This invention relates to a method, specifically a method for optimizing blast furnace tapping, belonging to the field of blast furnace ironmaking technology in the iron and steel metallurgy industry. Background Technology

[0002] The tapping of iron from the blast furnace in the ironmaking plant is a continuous process. After passing through the tapping hole in front of the furnace, the slag and iron flow to the iron trough and slag trough respectively. The molten iron passes through the iron trough and is switched by the swing hook nozzle to enter the torpedo ladle car. The blast furnace slag is cooled in the slag flushing pool and then enters the rotating drum to achieve water-slag separation. Finally, it is transported by water-slag belt for secondary utilization.

[0003] The blast furnace tapping process requires confirmation and coordination from systems such as the furnace front and slag system. Simultaneously, sampling and analysis of molten iron and blast furnace slag, as well as switching of the torpedo ladle car's swing hook nozzle, are necessary during tapping. In existing technology, the slag system is contacted before the blast furnace taphole to confirm that the granulation pump and underflow pump are operational, preventing damage to the slag equipment from high-temperature slag. However, during blast furnace tapping, the tapping area is a high-temperature molten metal zone and a metallurgical gas operating area, which can easily cause burns and gas poisoning among workers. From a safety perspective, entering the tapping area during the tapping process is strictly prohibited. Furthermore, there is still a risk of property damage due to human negligence causing burn-through of mechanical equipment such as slag conveyors and railway tracks. In addition, the switching of torpedo ladle cars in the existing technology is also judged by the operator by observing the molten iron level. However, due to the large amount of smoke and dust generated during the blast furnace tapping process, the operator's observation of the molten iron level is subject to errors, uncertainties and subjective assumptions, which may lead to molten iron overflow or splashing accidents. At the same time, it may also cause the torpedo ladle car to fail to meet the loading requirements, which will greatly reduce the turnover rate of the torpedo ladle car. In addition, the "empty" or "underloaded" torpedo ladle car will seriously cause the temperature drop of the molten iron, which will greatly reduce the accurate iron receiving rate, fail to meet the steelmaking requirements, and seriously restrict subsequent processes.

[0004] A search revealed that Chinese invention patent CN113736935A, entitled "Blast Furnace Molten Iron Transportation System and Method," discloses a blast furnace molten iron transportation system and method to overcome the shortcomings of existing technologies, such as low operating efficiency of molten iron ladles, a large number of online molten iron ladles required, and a large number of tail ladles generated. This system can improve the operating efficiency of molten iron ladles and significantly reduce the number of online molten iron ladles required and the number of tail ladles generated. However, it only considers the molten iron transportation system and does not realize the integrated operation of scheduling, transportation, and sampling. The application of this patent does not fundamentally optimize blast furnace tapping.

[0005] For example, Chinese invention patent CN105112589B, "A Method for Aligning Blast Furnace Iron Tapping and Molten Iron Ladles," provides a method for aligning blast furnace iron tapping and molten iron ladles. This method uses a ladle alignment tractor instead of a diesel locomotive to complete the alignment operation. Remote alignment is achieved through remote control, and multiple ladle alignment tractors can be controlled by a single remote controller. This prevents the tractors from moving due to misoperation during iron tapping, ensuring equipment and personnel safety. While this technology has significant advantages, it still requires the assistance and support of operators. Furthermore, the large amount of smoke and dust generated during blast furnace iron tapping often limits the operator's visibility, leading to significant deviations from the ideal results in practical applications. Therefore, a new solution is urgently needed to address these technical problems. Summary of the Invention

[0006] To address the safety hazards in current blast furnace tapping technology, such as burns and gas poisoning among workers, damage to mechanical equipment like slag conveyors and railway tracks due to human negligence, errors and uncertainties in operators' observation of molten iron levels caused by blast furnace dust leading to overflows or splashes, and significantly reduced torpedo ladle car turnover, molten iron temperature drop, and inaccurate iron receiving rate, which severely restrict subsequent production processes, this invention provides an optimized blast furnace tapping system and method. Through the coordinated operation of a slag integrated detection system, a torpedo ladle car matching detection system, a molten iron flow detection system, a slag quantity detection and automatic slag sampling system, an automatic molten iron temperature measurement system, an automatic molten iron sampling system, an automatic oscillating hook switching system, and an automatic scheduling and data entry system, this invention achieves fully automated control of the blast furnace tapping process, ensures accurate loading of torpedo ladle cars, effectively improves the turnover rate of blast furnace molten iron torpedo ladle cars, and significantly reduces molten iron temperature drop caused by "empty load" or "underload," thus facilitating smooth ironmaking production.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: a method for optimizing blast furnace iron tapping, the method comprising the following steps:

[0008] Step 1: Upon receiving the "Open the taphole" command, the integrated water slag detection system is activated. Simultaneously, it checks whether the granulation pump K1 and the underflow pump K2 of the water slag system are open. If both granulation pump K1 and underflow pump K2 are open, proceed to Step 2. If neither granulation pump K1 nor underflow pump K2 are open, an early warning message is sent to the water slag system, and manual intervention is initiated.

[0009] Further, in step 1, the number of granulation pumps K1 in the slag system is 1-3, and the number of underflow pumps K2 in the slag system is 1-3. However, in the optimized blast furnace tapping system and method of the present invention, the number of granulation pumps K1 and underflow pumps K2 in the slag system that are opened at the same time can be 1 each.

[0010] Step 2: After the granulation pump K1 and the underflow pump K2 are opened simultaneously in Step 1, the torpedo car matching detection system is quickly started to detect whether the torpedo car on the railway track is in place. When the torpedo car matching detection system of the present invention satisfies M1=1 and M2=1 or M1=1 or M2=1, the iron tap is opened and Step 3 is performed simultaneously.

[0011] Furthermore, in step 2, the torpedo tank car matching and detection systems M1 and M2 represent the two torpedo tank car transport lines corresponding to the iron tap.

[0012] Step 3: When the torpedo car matching detection system in Step 2 satisfies M1=1 and M2=1 or M1=1 or M2=1, the tap is opened, and an automatic timer is started. After the timer reaches T=T0, the mass M0 of the rail torpedo car is detected, and it is determined whether its value satisfies M0>M 标 ;

[0013] Furthermore, in step 3, after the timing time T = T0, if M0 > M 标 Then proceed to step 4;

[0014] Furthermore, in step 3, after the timing time T = T0, if M0 > M cannot be satisfied... 标 The system will then send an early warning message to the furnace front system, which will then manually intervene to check and promptly address whether the taphole and trough are stuck with coke.

[0015] Furthermore, in step 3, the M... 标 The weight of the tank allocated by the steel plant dispatcher, in tons, is entered by the steel plant dispatcher.

[0016] Furthermore, in step 3, the value of the timing time T0 is determined by the length of the iron trough L0 and the initial flow velocity of the molten iron at the taphole V0, and its calculation method is T0=ε*L0 / V0,s;

[0017] Furthermore, in step 3, ε is the delay coefficient, with a value of 1.05-1.35;

[0018] Furthermore, in step 3, the value of the timing time T0 can also be obtained from experience data on tapping iron from the taphole.

[0019] Step 4, when M0 > M in step 3 标 Then, continue timing. When the timing time T = T1, start the slag flow detection system to detect the slag flow rate Z on the slag conveyor belt and determine whether its value satisfies Z > Z0.

[0020] Furthermore, in step 4, if Z>Z0 is satisfied after the timing time T=T1, then step 5 is initiated;

[0021] Furthermore, in step 4, if Z>Z0 cannot be satisfied after the timing time T=T1, an early warning message is sent to the furnace front system and the slag system, and the furnace front system and the slag system will intervene manually. The furnace front system checks and promptly handles whether the taphole and trough are stuck with coke, and the slag system checks whether the slag trough, slag flushing pool, rotating drum, slag conveyor belt and other processes are normal. If there is any abnormality, it will be handled in a timely manner according to the pre-plan drill.

[0022] Furthermore, in step 4, Z0 is the slag flow rate when the slag conveyor belt is idling, t / min, and its value is obtained through experience in slag transportation of the slag system.

[0023] Furthermore, in step 4, the timing time T1 represents the time from the opening of the taphole to the entry of blast furnace slag into the conveyor belt. Its value is determined by the delayed slag flow time t1, the slag trough flow time t2, the slag flushing time t3, and the drum rotation time t4. The calculation formula is as follows:

[0024] T1 = t1 + t2 + t3 + t4, min

[0025] Furthermore, in step 4, the value of the timing time T1 can also be obtained from experience data on tapping iron from the taphole.

[0026] Step 5: After Z>Z0 is satisfied in Step 4, continue timing. When the timing time T=T2, check the mass M0 of the track torpedo car and determine whether its value satisfies M0>M 额 ;

[0027] Furthermore, in step 5, after the timing time T = T2, if M0 > M 额 Then the automatic molten iron temperature measurement system Q0 will be activated;

[0028] Furthermore, in step 5, after the timing time T = T2, if M0 > M cannot be satisfied... 额 Then continue waiting until the loop satisfies M0 > M 额 Start the automatic temperature measurement system for molten iron Q0;

[0029] Furthermore, in step 5, the M mentioned 额 The total weight of the molten iron and torpedo ladle cars is M, which is determined by the weight M of the ladle allocated by the steel mill dispatcher. 标 and the weight M of molten iron flowing in during the timing time T = T2. 铁水 The decision is made using the following formula:

[0030] M 额 =M 标 +M 铁水 , t

[0031] Furthermore, in step 5, the M mentioned 铁水 The timing time T2 and the average flow rate of molten iron V 平均The decision is made using the following formula:

[0032] M 铁水 =T2*V 平均 , t

[0033] Furthermore, in step 5, the M mentioned 铁水 The value can also be obtained from experience data on iron tapping from the taphole;

[0034] Furthermore, in step 5, the M mentioned 铁水 In both of the above methods, the constraint range is 160t≤M 铁水 ≤240t;

[0035] Step 6, when M0 > M in step 5 额 Start the automatic molten iron temperature measurement system Q0, and simultaneously determine whether the molten iron temperature Q0 meets the following constraint condition, Q max ≥Q0≥Q min ;

[0036] Furthermore, in step 6, if constraint Q is satisfied... max ≥Q0≥Q min Then the automatic hot metal sampling system is activated, and at the same time a "slag sample can be taken" signal is sent to the slag system to complete the blast furnace slag sample sampling and analysis.

[0037] Furthermore, in step 6, if constraint Q cannot be satisfied... max ≥Q0≥Q min Then continue waiting until the loop satisfies Q. max ≥Q0≥Q min Then the automatic hot metal sampling system is activated, and at the same time a "slag sample can be taken" signal is sent to the slag system to complete the blast furnace slag sample sampling and analysis.

[0038] Furthermore, in step 6, the Q... max and Q min The value is determined by the blast furnace condition and can also be obtained from experience data on tapping iron from the taphole.

[0039] Step 7: After the automatic sampling of molten iron and slag samples is completed in Step 6, continue timing. When the timing time T = T3, check the mass M0 of the rail torpedo ladle car and determine whether its value satisfies M0 ≥ M max ;

[0040] Furthermore, in step 7, if M0≥M max If the original M0→M1 is switched to M0→M2 or the original M0→M2 is switched to M0→M1, then the swing hook mouth automatic switching system will be activated; that is, the original M0→M1 will be switched to M0→M2 or the original M0→M2 will be switched to M0→M1.

[0041] Furthermore, in step 7, the M... maxThis is the maximum total weight of molten iron and the torpedo ladle that the torpedo ladle car can bear. This value is jointly provided by the steel plant's dispatching and transportation center, and depends on the blast furnace condition and molten iron distribution. Generally, its constraint range is 520t ≤ M. max ≤590t;

[0042] Step 7: After the above-mentioned integrated slag detection system, torpedo ladle matching detection system, molten iron flow detection system, slag quantity detection and automatic slag sampling system, automatic molten iron temperature measurement system, automatic molten iron sampling system, and automatic switching system for swing hook nozzle are completed, preparations are made for plugging. After plugging is completed, the mud-removing pressure is recorded, and the automatic scheduling and data entry system is started to notify the scheduler that the molten iron tapping of this ladle has been completed. At the same time, the tapping data is automatically entered into the system, and the tapping cycle is repeated.

[0043] Compared to existing technologies, this solution has the following advantages:

[0044] (1) The present invention provides a system and method for optimizing blast furnace tapping. Through the coordination of systems such as slag integrated detection system, torpedo ladle matching detection system, molten iron flow detection system, slag quantity detection and automatic slag sampling system, molten iron automatic temperature measurement system, molten iron automatic sampling system, swing hook automatic switching system, automatic scheduling and data entry system, the system reduces the workload and working time of front-line operators and can effectively avoid safety accidents such as burns and gas poisoning of operators caused by high-temperature slag and iron and metallurgical gas areas.

[0045] (2) The present invention provides a system and method for optimizing blast furnace tapping, which can effectively avoid the damage to mechanical equipment such as slag conveyors and railway tracks caused by operator negligence in the prior art.

[0046] (3) The system and method for optimizing blast furnace tapping of the present invention can effectively avoid the large amount of smoke and dust generated during the blast furnace tapping process, the error and uncertainty of the operator's observation of the molten iron level, and the subjective conjecture, which may lead to molten iron overflow or splashing accidents.

[0047] (4) The present invention provides a system and method for optimizing blast furnace tapping, which realizes fully automatic control of the blast furnace tapping process, achieves precise "loading" of torpedo ladle cars, effectively improves the turnover rate of blast furnace molten iron torpedo ladle cars, and significantly reduces the temperature drop of molten iron caused by "empty load" or "underload", which is conducive to the smooth operation of ironmaking production. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the pre-opening inspection system of the iron tap of the present invention;

[0049] Figure 2 This is a schematic diagram of the system after the iron tap is opened in Embodiment 1 of the present invention.

[0050] Figure 3 This is a schematic diagram of the system after the iron tap is opened in Embodiment 2 of the present invention.

[0051] In the figure: 1. Slag integrated detection system; 2. Torpedo ladle matching detection system; 3. Molten iron flow detection system; 4. Slag quantity detection and automatic slag sampling system; 5. Automatic molten iron temperature measurement system; 6. Automatic molten iron sampling system; 7. Automatic switching system for swing hook nozzle; 8. Automatic scheduling and data entry system. Other labels are described in the embodiments. Detailed Implementation

[0052] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0053] Example 1

[0054] This embodiment was implemented using the process of blast furnace No. 4 in a steel plant, with an effective volume of 3200m³. 3 There are four tapholes, named 1#, 2#, 3#, and 4#, which correspond to two railway lines respectively: Furnace Line 8 and Furnace Line 7, Furnace Line 6 and Furnace Line 5, Furnace Line 4 and Furnace Line 3, and Furnace Line 2 and Furnace Line 1. There are two slag removal systems, one in the north and one in the south. Tapholes 1# and 2# correspond to the north slag removal system, and tapholes 3# and 4# correspond to the south slag removal system. The process includes the following steps:

[0055] Step 1: Upon receiving the "Open the taphole" command, the integrated water slag detection system is activated. Simultaneously, it checks whether the granulation pump K1 and the underflow pump K2 of the water slag system are open. If both granulation pump K1 and underflow pump K2 are open, proceed to Step 2. If neither granulation pump K1 nor underflow pump K2 are open, an early warning message is sent to the water slag system, and manual intervention is initiated.

[0056] In step 1, the number of granulation pumps K1 in the slag system is 3, and the number of underflow pumps K2 in the slag system is 2;

[0057] Step 2: After the granulation pump K1 and the underflow pump K2 are opened simultaneously in Step 1, the torpedo car matching detection system is quickly started to detect whether the torpedo car on the railway track is in place. When the torpedo car matching detection system of the present invention satisfies M1=1 and M2=1 and opens the iron tap, Step 3 is performed simultaneously.

[0058] In step 2, the torpedo tank car matching and detection systems M1 and M2 represent the two torpedo tank car transport lines corresponding to the iron tap.

[0059] Step 3: When the torpedo car matching detection system in Step 2 satisfies M1 = 1 and M2 = 1, open the taphole and start automatic timing. After the timing time T = T0, check the mass M0 of the rail torpedo car and determine whether its value satisfies M0 > M 标 ;

[0060] In step 3, after the timing time T = T0, if M0 > M 标 Then proceed to step 4;

[0061] In step 3, after the timing time T = T0, if M0 > M cannot be satisfied... 标 The system will then send an early warning message to the furnace front system, which will then manually intervene to check and promptly address whether the taphole and trough are stuck with coke.

[0062] In step 3, the M 标 The weight of the tank allocated by the steel plant dispatcher, in tons, is entered by the steel plant dispatcher. In this embodiment, M 标 It is 280t;

[0063] In step 3, the value of the timing time T0 is determined by the length of the iron trough L0 and the initial flow velocity of the molten iron at the taphole V0. The calculation method is T0=ε*L0 / V0,s;

[0064] In step 3, ε is the delay coefficient, with a value of 1.05-1.35;

[0065] In step 3, the value of the timing time T0 can also be obtained through experience data on iron tapping from the taphole. In this embodiment, the value of T0 is 1 minute.

[0066] Step 4, when M0 > M in step 3 标 Then, continue timing. When the timing time T = T1, start the slag flow detection system to detect the slag flow rate Z on the slag conveyor belt and determine whether its value satisfies Z > Z0.

[0067] In step 4, if Z>Z0 is satisfied after the timing time T=T1, then step 5 is started;

[0068] In step 4, if Z>Z0 cannot be satisfied after the timing time T=T1, an early warning message is sent to the furnace front system and the slag system. The furnace front system and the slag system will then intervene manually. The furnace front system will check and promptly handle whether the taphole and trough are stuck with coke. The slag system will check whether the slag trough, slag flushing pool, rotating drum, slag conveyor belt and other processes are normal. If there are any abnormalities, they will be handled in a timely manner according to the emergency plan.

[0069] In step 4, Z0 is the slag flow rate when the slag conveyor belt is idling, in t / min. Its value is obtained through experience in slag transportation of the slag system. In this embodiment, the value of Z0 is 0.2t / min.

[0070] In step 4, the timing time T1 represents the time from the opening of the taphole to the entry of blast furnace slag into the conveyor belt. Its value is determined by the delayed slag flow time t1, the slag trough flow time t2, the slag flushing time t3, and the drum rotation time t4. The calculation formula is as follows:

[0071] T1 = t1 + t2 + t3 + t4, min

[0072] In step 4, the timing time T1 can also be obtained from the experience data of tapping iron from the taphole. In this embodiment, the value of T1 is 15 minutes.

[0073] Step 5: After Z>Z0 is satisfied in Step 4, continue timing. When the timing time T=T2, check the mass M0 of the track torpedo car and determine whether its value satisfies M0>M 额 ;

[0074] In step 5, after the timing time T = T2, if M0 > M 额 Then the automatic molten iron temperature measurement system Q0 will be activated;

[0075] In step 5, after the timing time T = T2, if M0 > M cannot be satisfied... 额 Then continue waiting until the loop satisfies M0 > M 额 Start the automatic temperature measurement system for molten iron Q0;

[0076] In step 5, the M 额 The total weight of the molten iron and torpedo ladle cars is M, which is determined by the weight M of the ladle allocated by the steel mill dispatcher. 标 and the weight M of molten iron flowing in during the timing time T = T2. 铁水 The decision is made using the following formula:

[0077] M 额 =M 标 +M 铁水 , t

[0078] In step 5, the M 铁水 The timing time T2 and the average flow rate of molten iron V 平均 The decision is made using the following formula:

[0079] M 铁水 =T2*V 平均 , t

[0080] In step 5, the M 铁水 The value can also be obtained from experience data on iron tapping from the taphole;

[0081] In step 5, the M 铁水 In both of the above methods, the constraint range is 160t≤M 铁水 ≤240t, in this embodiment, M 铁水 Based on empirical data obtained from the tapping process, the value is 200t, which corresponds to M in this embodiment. 额 It is 480t;

[0082] Step 6, when M0 > M in step 5额 Start the automatic molten iron temperature measurement system Q0, and simultaneously determine whether the molten iron temperature Q0 meets the following constraint condition, Q max ≥Q0≥Q min ;

[0083] In step 6, if constraint Q is satisfied... max ≥Q0≥Q min Then the automatic hot metal sampling system is activated, and at the same time a "slag sample can be taken" signal is sent to the slag system to complete the blast furnace slag sample sampling and analysis.

[0084] In step 6, if constraint Q cannot be satisfied... max ≥Q0≥Q min Then continue waiting until the loop satisfies Q. max ≥Q0≥Q min Then the automatic hot metal sampling system is activated, and at the same time a "slag sample can be taken" signal is sent to the slag system to complete the blast furnace slag sample sampling and analysis.

[0085] In step 6, the Q... max and Q min The value is determined by the blast furnace condition and can also be obtained from experience data on tapping iron from the taphole. In this embodiment, Q max The value is set to 1540℃, and Q is... min The value is 1440℃;

[0086] Step 7: After the automatic sampling of molten iron and slag samples is completed in Step 6, continue timing. When the timing time T = T3, check the mass M0 of the rail torpedo ladle car and determine whether its value satisfies M0 ≥ M max ;

[0087] In step 7, if M0≥M max If the original M0→M1 is switched to M0→M2 or the original M0→M2 is switched to M0→M1, then the swing hook mouth automatic switching system will be activated; that is, the original M0→M1 will be switched to M0→M2 or the original M0→M2 will be switched to M0→M1.

[0088] In step 7, the M max This is the maximum total weight of molten iron and the torpedo ladle that the torpedo ladle car can bear. This value is jointly provided by the steel plant's dispatching and transportation center, and depends on the blast furnace condition and molten iron distribution. Generally, its constraint range is 520t ≤ M. max ≤590t, M in this embodiment max It is 560t;

[0089] Step 7: After the above-mentioned integrated slag detection system, torpedo ladle matching detection system, molten iron flow detection system, slag quantity detection and automatic slag sampling system, automatic molten iron temperature measurement system, automatic molten iron sampling system, and automatic switching system for the swing hook nozzle are completed, preparations are made for plugging. After plugging is completed, the mud-removing pressure is recorded, the automatic scheduling and data entry system is activated, and the dispatcher is notified that the tapping of molten iron from this ladle is complete. At the same time, the tapping data is automatically entered into the system, and this cycle of tapping continues. Figure 1 , Figure 2 As shown.

[0090] Example 2:

[0091] This embodiment was implemented using the process of blast furnace No. 4 in a steel plant, with an effective volume of 3200m³. 3 There are four tapholes, named 1#, 2#, 3#, and 4#, corresponding to two railway lines: Furnace Line 8 and Furnace Line 7, Furnace Line 6 and Furnace Line 5, Furnace Line 4 and Furnace Line 3, and Furnace Line 2 and Furnace Line 1, respectively. There are two slag removal systems, one in the north and one in the south. Tapholes 1# and 2# correspond to the north slag removal system, while tapholes 3# and 4# correspond to the south slag removal system. The technology and steps used are the same as in Example 1, the only difference being that in Example 1, the "torpedo car matching detection system opens the taphole when M1=1 and M2=1," while in this example, the torpedo car matching detection system opens the taphole when M1=1 or M2=1, including the following steps:

[0092] Step 1: Upon receiving the "Open the taphole" command, the integrated water slag detection system is activated. Simultaneously, it checks whether the granulation pump K1 and the underflow pump K2 of the water slag system are open. If both granulation pump K1 and underflow pump K2 are open, proceed to Step 2. If neither granulation pump K1 nor underflow pump K2 are open, an early warning message is sent to the water slag system, and manual intervention is initiated.

[0093] In step 1, the number of granulation pumps K1 in the slag system is 3, and the number of underflow pumps K2 in the slag system is 2;

[0094] Step 2: When the granulation pump K1 and the underflow pump K2 are opened simultaneously in Step 1, the torpedo car matching detection system is quickly started to detect whether the torpedo car on the railway track is in place. When the torpedo car matching detection system of the present invention satisfies M1=1 or M2=1 and opens the iron tap, Step 3 is performed simultaneously.

[0095] In step 2, the torpedo tank car matching and detection systems M1 and M2 represent the two torpedo tank car transport lines corresponding to the iron tap.

[0096] Step 3: When the torpedo car matching detection system in Step 2 satisfies M1 = 1 or M2 = 1, open the taphole and start automatic timing. After the timing time T = T0, check the mass M0 of the rail torpedo car and determine whether its value satisfies M0 > M 标 ;

[0097] In step 3, after the timing time T = T0, if M0 > M 标 Then, step 4 is initiated, and a "tank shortage alarm" signal is issued to urge the dispatcher to dispatch the torpedo tanker truck.

[0098] In step 3, after the timing time T = T0, if M0 > M cannot be satisfied... 标 The system will then send an early warning message to the furnace front system, which will then manually intervene to check and promptly address whether the taphole and trough are stuck with coke.

[0099] In step 3, the M 标 The weight of the tank allocated by the steel plant dispatcher, in tons, is entered by the steel plant dispatcher. In this embodiment, M 标 It is 280t;

[0100] In step 3, the value of the timing time T0 is determined by the length of the iron trough L0 and the initial flow velocity of the molten iron at the taphole V0. The calculation method is T0=ε*L0 / V0,s;

[0101] In step 3, ε is the delay coefficient, with a value of 1.05-1.35;

[0102] In step 3, the value of the timing time T0 can also be obtained through experience data on iron tapping from the taphole. In this embodiment, the value of T0 is 1 minute.

[0103] Step 4, when M0 > M in step 3 标 Then, the timing continues. When the timing time T = T1, the slag arrival detection system is activated to detect the slag flow rate Z on the slag conveyor belt and determine whether its value satisfies Z > Z0. At the same time, a "shortage alarm" signal is issued to further urge the dispatcher to dispatch the torpedo tanker.

[0104] In step 4, if Z>Z0 is satisfied after the timing time T=T1, then step 5 is started;

[0105] In step 4, if Z>Z0 cannot be satisfied after the timing time T=T1, an early warning message is sent to the furnace front system and the slag system. The furnace front system and the slag system will then intervene manually. The furnace front system will check and promptly handle whether the taphole and trough are stuck with coke. The slag system will check whether the slag trough, slag flushing pool, rotating drum, slag conveyor belt and other processes are normal. If there are any abnormalities, they will be handled in a timely manner according to the emergency plan.

[0106] In step 4, Z0 is the slag flow rate when the slag conveyor belt is idling, in t / min. Its value is obtained through experience in slag transportation of the slag system. In this embodiment, the value of Z0 is 0.2t / min.

[0107] In step 4, the timing time T1 represents the time from the opening of the taphole to the entry of blast furnace slag into the conveyor belt. Its value is determined by the delayed slag flow time t1, the slag trough flow time t2, the slag flushing time t3, and the drum rotation time t4. The calculation formula is as follows:

[0108] T1 = t1 + t2 + t3 + t4, min

[0109] In step 4, the timing time T1 can also be obtained from the experience data of tapping iron from the taphole. In this embodiment, the value of T1 is 15 minutes.

[0110] Step 5: After Z>Z0 is satisfied in Step 4, continue timing. When the timing time T=T2, check the mass M0 of the track torpedo car and determine whether its value satisfies M0>M 额 ;

[0111] In step 5, after the timing time T = T2, if M0 > M 额 Then the automatic molten iron temperature measurement system Q0 is activated, and a "lamb shortage alarm" signal is issued, urging the dispatcher to dispatch the torpedo ladle car again;

[0112] In step 5, after the timing time T = T2, if M0 > M cannot be satisfied... 额 Then continue waiting until the loop satisfies M0 > M 额 Start the automatic temperature measurement system for molten iron Q0;

[0113] In step 5, the M 额 The total weight of the molten iron and torpedo ladle cars is M, which is determined by the weight M of the ladle allocated by the steel mill dispatcher. 标 and the weight M of molten iron flowing in during the timing time T = T2. 铁水 The decision is made using the following formula:

[0114] M 额 =M 标 +M 铁水 , t

[0115] In step 5, the M 铁水 The timing time T2 and the average flow rate of molten iron V 平均 The decision is made using the following formula:

[0116] M 铁水 =T2*V 平均 , t

[0117] In step 5, the M 铁水The value can also be obtained from experience data on iron tapping from the taphole;

[0118] In step 5, the M 铁水 In both of the above methods, the constraint range is 160t≤M 铁水 ≤240t, in this embodiment, M 铁水 Based on empirical data obtained from the tapping process, the value is 200t, which corresponds to M in this embodiment. 额 It is 480t;

[0119] Step 6, when M0 > M in step 5 额 Start the automatic molten iron temperature measurement system Q0, and simultaneously determine whether the molten iron temperature Q0 meets the following constraint condition, Q max ≥Q0≥Q min ;

[0120] In step 6, if constraint Q is satisfied... max ≥Q0≥Q min Then the automatic hot metal sampling system is activated, and a "slag sample available" signal is sent to the slag system to complete the blast furnace slag sample sampling and analysis. At the same time, a "ladle shortage alarm" signal is sent, and the dispatcher is urged to dispatch the torpedo ladle car again.

[0121] In step 6, if constraint Q cannot be satisfied... max ≥Q0≥Q min Then continue waiting until the loop satisfies Q. max ≥Q0≥Q min Then the automatic hot metal sampling system is activated, and at the same time a "slag sample can be taken" signal is sent to the slag system to complete the blast furnace slag sample sampling and analysis.

[0122] In step 6, the Q... max and Q min The value is determined by the blast furnace condition and can also be obtained from experience data on tapping iron from the taphole. In this embodiment, Q max The value is set to 1540℃, and Q is... min The value is 1440℃;

[0123] Step 7: After the automatic sampling of molten iron and slag in Step 6 is completed, compared to Example 1, this step involves restarting the torpedo ladle car matching detection system M1 and M2, and determining whether the torpedo ladle car matching detection system satisfies M1=1 and M2=1. If satisfied, proceed to the next step of tapping iron according to Example 1; if not satisfied, send an "emergency plugging" signal to the furnace front system. At this time, another torpedo ladle car has not yet arrived, and emergency plugging is necessary. Figure 3 As shown.

[0124] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A method for optimizing blast furnace tapping, characterized in that, The blast furnace tapping optimization system includes a slag integrated detection system, a torpedo ladle matching detection system, a molten iron flow detection system, a slag quantity detection and automatic slag sampling system, a molten iron automatic temperature measurement system, a molten iron automatic sampling system, a swing hook nozzle automatic switching system, and an automatic scheduling and data entry system. The method includes the following steps: Step 1: Upon receiving the "Open the taphole" command, the integrated water slag detection system is activated. Simultaneously, it checks whether the granulation pump K1 and the underflow pump K2 of the water slag system are open. If both granulation pump K1 and underflow pump K2 are open, proceed to Step 2. If neither granulation pump K1 nor underflow pump K2 are open, an early warning message is sent to the water slag system, and manual intervention is performed. Step 2: After the granulation pump K1 and the underflow pump K2 are opened simultaneously in Step 1, the torpedo car matching detection system is quickly started to check whether the torpedo car is in place on the railway track. When the torpedo car matching detection system meets the condition that M1=1 and M2=1 or M1=1 or M2=1, the iron tap is opened, and Step 3 is performed simultaneously. In Step 2, M1 and M2 of the torpedo car matching detection system represent the two torpedo car transport lines corresponding to the iron tap. Step 3: When the torpedo car matching detection system in Step 2 satisfies M1=1 and M2=1 or M1=1 or M2=1, the tap is opened, and an automatic timer is started. After the timer reaches T=T0, the mass M0 of the rail torpedo car is detected, and it is determined whether its value satisfies M0>M 标 ; In step 3, the M 标 The weight of the tank allocated by the steel plant dispatcher, in tons, is entered by the steel plant dispatcher. In step 3, the value of the timing time T0 is determined by the length of the iron trough L0 and the initial flow velocity of the molten iron at the taphole V0. The calculation method is T0 = ɛ * L0 / V0, s; In step 3, ɛ is the delay coefficient, with a value of 1.05-1.35; Step 4, when M0 > M in step 3 标 Then, continue timing. When the timing time T=T1, start the slag flow detection system to detect the slag flow rate Z on the slag conveyor belt and determine whether its value satisfies Z>Z0. In step 4, Z0 is the slag flow rate when the slag conveyor belt is running idle, t / min, and its value is obtained through experience in slag transportation of the slag system. In step 4, the timing time T1 represents the time from the opening of the taphole to the entry of blast furnace slag into the conveyor belt. Its value is determined by the delayed slag flow time t1, the slag trough flow time t2, the slag flushing time t3, and the drum rotation time t4. The calculation formula is as follows: T1 = t1 + t2 + t3 + t4, min; In step 4, the timing time T1 can also be obtained from experience data on tapping iron from the taphole; Step 5: After Z>Z0 is satisfied in Step 4, continue timing. When the timing time T=T2, check the mass M0 of the track torpedo car and determine whether its value satisfies M0>M 额 ; In step 5, the M 额 The total weight of the molten iron and torpedo ladle cars is M, which is determined by the weight M of the ladle allocated by the steel mill dispatcher. 标 and the weight M of molten iron flowing in during the timing time T=T2. 铁水 The decision is made using the following formula: M 额 =M 标 +M 铁水 ,t In step 5, the M 铁水 The timing time T2 and the average flow rate of molten iron V 平均 The decision is made using the following formula: M 铁水 =T2*V 平均 ,t In step 5, the M 铁水 The value can also be obtained from experience data on iron tapping from the taphole; In step 5, the M 铁水 In the acquisition method, the constraint range is 160t ≤ M. 铁水 ≤240t; Step 6, when M0 > M in step 5 额 Start the automatic molten iron temperature measurement system Q0, and simultaneously determine whether the molten iron temperature Q0 meets the following constraint condition, Q max ≥Q0≥Q min Then the automatic hot metal sampling system is activated, and a "slag sample available" signal is sent to the slag system to complete the blast furnace slag sampling and analysis; in step 6, Q... max and Q min The value is determined by the blast furnace condition and can also be obtained from experience data on tapping iron from the taphole. Step 7: After the automatic sampling of molten iron and slag is completed in Step 6, continue timing. When the timing time T=T3, check the mass M0 of the rail torpedo ladle car and determine whether its value satisfies M0≥M max Then the automatic switching system for the swing hook nozzle will be activated.

2. The blast furnace tapping optimization method according to claim 1, characterized in that, In step 1, the number of granulation pumps K1 in the slag system is 1-3, the number of underflow pumps K2 in the slag system is 1-3, and the number of granulation pumps K1 and underflow pumps K2 in the slag system simultaneously is 1 each.

3. The blast furnace tapping optimization method according to claim 2, characterized in that, In step 3, after the timing time T = T0, if M0 > M 标 Then proceed to step 4; In step 3, after the timing time T = T0, if M0 > M... 标 The system will then send an early warning message to the furnace front system, which will then manually intervene to check and promptly address whether the taphole and trough are stuck with coke. In step 3, the value of the timing time T0 can also be obtained from the experience data of tapping iron from the taphole.

4. The blast furnace tapping optimization method according to claim 3, characterized in that, In step 4, if Z>Z0 is satisfied after the timing time T=T1, then step 5 is started; In step 4, if Z>Z0 cannot be satisfied after the timing time T=T1, an early warning message is sent to the furnace front system and the slag system. The furnace front system and the slag system will then intervene manually. The furnace front system will check and promptly handle whether the taphole and trough are stuck with coke. The slag system will check whether the slag trough, slag flushing pool, rotating drum, and slag conveyor belt processes are normal. If any abnormality is found, it will be handled promptly according to the emergency plan.

5. The blast furnace tapping optimization method according to claim 3 or 4, characterized in that, In step 5, after the timing time T = T2, if M0 > M 额 Then the automatic molten iron temperature measurement system Q0 will be activated; In step 5, if the timeout period T = T2, and M0 > M cannot be satisfied... 额 Then continue waiting until the loop satisfies M0 > M 额 Start the automatic temperature measurement system for molten iron (Q0).

6. The blast furnace tapping optimization method according to claim 5, characterized in that, In step 6, if constraint Q is satisfied... max ≥Q0≥Q min Then the automatic hot metal sampling system is activated, and at the same time a "slag sample can be taken" signal is sent to the slag system to complete the blast furnace slag sample sampling and analysis. In step 6, if constraint Q cannot be satisfied... max ≥Q0≥Q min Then continue waiting until the loop satisfies Q. max ≥Q0≥Q min The automatic molten iron sampling system is then activated, and a "slag sample can be taken" signal is sent to the slag system to complete the blast furnace slag sample sampling and analysis.

7. The blast furnace tapping optimization method according to claim 6, characterized in that, In step 7, if M0≥M max If the original M0→M1 is switched to M0→M2 or the original M0→M2 is switched to M0→M1, then the swing hook mouth automatic switching system will be activated; that is, the original M0→M1 will be switched to M0→M2 or the original M0→M2 will be switched to M0→M1. In step 7, the M max This is the maximum total weight of molten iron and the torpedo ladle that the torpedo ladle car can withstand. This value is jointly provided by the steel plant's dispatching and transportation center, and its constraint range is 520t ≤ M. max ≤590t; Step 7: After the above-mentioned integrated slag detection system, torpedo ladle matching detection system, molten iron flow detection system, slag quantity detection and automatic slag sampling system, automatic molten iron temperature measurement system, automatic molten iron sampling system, and automatic switching system for swing hook nozzle are completed, preparations are made for plugging. After plugging is completed, the mud-removing pressure is recorded, and the automatic scheduling and data entry system is started to notify the scheduler that the molten iron tapping of this ladle has been completed. At the same time, the tapping data is automatically entered into the system, and the tapping cycle is repeated.

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