Blast furnace stokehole dust removal control system and method

Abstract

The invention discloses a blast furnace stokehole dust removal control system and method.The system comprises an iron notch drilling machine, a hydraulic clay gun, a swing sliding nozzle, stokehole dust removal equipment and a control unit, the iron notch drilling machine is used for opening a blast furnace iron notch, and the hydraulic clay gun is used for blocking the blast furnace iron notch after tapping is completed; the swinging chute nozzle is used for receiving molten iron flowing out of the branch iron runner and feeding the molten iron into the molten iron tank; the stokehole dust removal equipment is electrically connected with the iron notch drilling machine, the hydraulic clay gun and the swing chute nozzle through the control unit, and when the iron notch drilling machine starts iron notch drilling operation, the control unit controls the stokehole dust removal equipment to be started and enter a first preset dust removal efficiency working state; when the hydraulic clay gun finishes the plugging operation, the control unit controls the stokehole dust removal equipment to reduce the dust removal efficiency and enter a second preset dust removal efficiency working state, and when the swing chute nozzle finishes the molten iron conveying operation, the control unit controls the stokehole dust removal equipment to be closed.

Description

Technical Field

[0001] This invention relates to the field of blast furnace dust removal technology, and particularly to a blast furnace dust removal control system and method. Background Technology

[0002] The blast furnace front area is where slag and iron are tapped and handled. Operations include tasks primarily focused on slag and iron tapping, as well as maintenance of the taphole, skimmers and slag / iron trough, tapping equipment, and tuyere replacement. Even with the slag / iron trough covers, significant amounts of smoke and dust still escape during tapping, causing substantial environmental pollution and posing a significant health threat to furnace operators. Therefore, dust collection devices are typically installed in areas where smoke and dust escape, reducing pollution and improving the working environment.

[0003] The main dust removal equipment in front of the blast furnace includes taphole dust removal device, slag skimmer dust removal device, iron support trough dust removal device, slag trough dust removal device and chute dust removal device.

[0004] Currently, the above-mentioned furnace dust removal equipment is under independent control. During the tapping process, it is turned on or off simultaneously by manual or electrical control, which leads to problems such as inconvenient operation and untimely dust removal. Summary of the Invention

[0005] The purpose of this invention is to provide a blast furnace front dust removal control system, which at least solves the problem of inconvenient operation caused by the independent control of blast furnace front dust removal equipment in the prior art.

[0006] The above-mentioned objectives of the present invention can be achieved by the following technical solutions:

[0007] This invention provides a blast furnace front dust removal control system, including a taphole opener, a hydraulic mud gun, a swing chute, a furnace front dust removal device, and a control unit. The taphole opener is used to open the blast furnace taphole, and the hydraulic mud gun is used to seal the taphole after tapping. The swing chute is used to receive molten iron flowing from the iron trough and send it into the molten iron ladle. The furnace front dust removal device is electrically connected to the taphole opener, the hydraulic mud gun, and the swing chute through the control unit. When the taphole opener starts tapping, the control unit controls the furnace front dust removal device to turn on and enter a first preset dust removal efficiency working state. When the hydraulic mud gun finishes sealing, the control unit controls the furnace front dust removal device to reduce its dust removal efficiency and enter a second preset dust removal efficiency working state. When the swing chute finishes conveying molten iron, the control unit controls the furnace front dust removal device to turn off.

[0008] Specifically, the furnace front dust removal equipment includes a taphole dust removal device, a slag skimmer dust removal device, a support trough dust removal device, a slag trough dust removal device, and a chute dust removal device, all electrically connected to the output of the control unit.

[0009] Preferably, the control unit includes a first control module, a second control module, a third control module, a fourth control module, and a fifth control module. The first control module is used to control the start-up and shutdown of the taphole dust removal device and its dust removal efficiency; the second control module is used to control the start-up and shutdown of the skimmer dust removal device and its dust removal efficiency; the third control module is used to control the start-up and shutdown of the iron support trough dust removal device and its dust removal efficiency; the fourth control module is used to control the start-up and shutdown of the slag trough dust removal device and its dust removal efficiency; and the fifth control module is used to control the start-up and shutdown of the chute dust removal device and its dust removal efficiency.

[0010] Preferably, the iron tap dust removal device includes a top suction dust removal mechanism and a side suction dust removal mechanism, wherein the top suction dust removal mechanism is disposed above the iron tap and the side suction dust removal mechanism is disposed on both sides of the iron tap.

[0011] Preferably, the first control module includes a top suction control module electrically connected to the top suction dust removal mechanism and a side suction control module electrically connected to the side suction dust removal mechanism.

[0012] Preferably, the dust removal device for the chute includes a first dust removal mechanism and a second dust removal mechanism, which are respectively disposed on both sides of the iron outlet of the oscillating chute.

[0013] Preferably, a first molten iron collection line and a second molten iron collection line are respectively provided on both sides below the swing nozzle. Multiple molten iron ladles are arranged on the first molten iron collection line and the second molten iron collection line. The first molten iron collection line is arranged on the same side as the first dust removal mechanism, and the second molten iron collection line is arranged on the same side as the second dust removal mechanism.

[0014] Specifically, when the oscillating chute tilts downward toward the first molten iron collection line, the fifth control module controls the first dust removal mechanism to increase its dust removal efficiency and controls the second dust removal mechanism to decrease its dust removal efficiency; when the oscillating chute tilts downward toward the second molten iron collection line, the fifth control module controls the second dust removal mechanism to increase its dust removal efficiency and controls the first dust removal mechanism to decrease its dust removal efficiency.

[0015] Preferably, the fifth control module includes a first chute dust removal control module electrically connected to the first dust removal mechanism and a second chute dust removal control module electrically connected to the second dust removal mechanism.

[0016] Another objective of this invention is to provide a blast furnace front dust removal control method, which is implemented using the blast furnace front dust removal control system described above, comprising: acquiring a taphole start signal of the taphole machine; after acquiring the taphole start signal, the control unit controls the furnace front dust removal equipment to start and enter a first preset dust removal efficiency working state based on the taphole start signal; acquiring a plugging operation stop signal of the hydraulic mud gun; after acquiring the plugging operation stop signal of the hydraulic mud gun, the control unit controls the furnace front dust removal equipment to reduce the dust removal efficiency and enter a second preset dust removal efficiency working state based on the plugging operation stop signal of the hydraulic mud gun; acquiring a molten iron conveying end signal of the oscillating chute; after acquiring the molten iron conveying end signal of the oscillating chute, the control unit controls the furnace front dust removal equipment to shut down based on the molten iron conveying end signal of the oscillating chute.

[0017] Specifically, when the feed motor of the taphole opener starts feeding, the taphole opener sends a taphole opening operation start signal to the control unit; when the hydraulic mud gun's rotary cylinder holds pressure for a preset time, the hydraulic mud gun sends a taphole blocking operation stop signal to the control unit; when the drive assembly of the swing chute stops outputting, the swing chute sends an iron conveying end signal to the control unit.

[0018] The features and advantages of this invention are as follows: The blast furnace front dust removal control system provided in this application realizes automatic control of the opening and closing status and dust removal efficiency of the furnace front dust removal equipment based on the start and stop of the operation of the taphole machine, hydraulic mud gun, swing chute and control unit through signal transmission. This solves the problems of inconvenient opening and closing operation and untimely dust removal of the furnace front dust removal equipment, while also taking into account resource conservation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the composition of the blast furnace front dust removal control system provided in an embodiment of the present invention.

[0021] Explanation of icon numbers:

[0022] 1. Hydraulic pump station; 2. Control valve platform; 3. Hydraulic mud gun; 4. Iron tapping machine; 5. Top suction control module; 6. Side suction control module; 7. Second control module; 8. Third control module; 9. Fourth control module; 10. First chute dust removal control module; 11. Second chute dust removal control module; 12. Swinging chute; 13. Chute swing control module; 14. First weighing device; 15. Second weighing device. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, this invention provides a blast furnace front dust removal control system, including a taphole opener 4, a hydraulic mud gun 3, a swing chute 12, a furnace front dust removal device, and a control unit. The taphole opener 4 is used to open the blast furnace taphole, and the hydraulic mud gun 3 is used to seal the blast furnace taphole after tapping. The swing chute 12 is used to receive molten iron flowing from the iron trough and send it into the molten iron ladle. The furnace front dust removal device is electrically connected to the taphole opener 4, the hydraulic mud gun 3, and the swing chute 12 through the control unit. When the taphole opener 4 starts tapping, the control unit controls the furnace front dust removal device to turn on and enter the first preset dust removal efficiency working state. When the hydraulic mud gun 3 finishes sealing, the control unit controls the furnace front dust removal device to reduce the dust removal efficiency and enter the second preset dust removal efficiency working state. When the swing chute 12 finishes molten iron conveying, the control unit controls the furnace front dust removal device to turn off. Thus, through signal transmission between the taphole opener 4, the hydraulic mud gun 3, the oscillating chute 12, and the control unit, the opening and closing status and dust removal efficiency of the furnace-front dust removal equipment are automatically controlled based on the start and stop operations of the taphole opener 4, the hydraulic mud gun 3, and the oscillating chute 12. This solves the problems of inconvenient operation and untimely dust removal of the furnace-front dust removal equipment, while also achieving resource conservation. In this embodiment, the control unit controls the dust removal efficiency of the furnace-front dust removal equipment by controlling its drive power. Furthermore, to better improve the furnace-front environment, the furnace-front dust removal equipment adopts adsorption-type dust removal. The control unit controls the airflow by controlling the drive power of the furnace-front dust removal equipment, thereby achieving dust removal efficiency control.

[0025] To further achieve resource conservation, the preferred dust removal efficiency is, firstly, the optimal dust removal efficiency that matches the large amount of dust generated when the furnace dust removal equipment is in operation and the iron is being tapped from the taphole; secondly, the optimal dust removal efficiency that matches the smaller amount of dust generated when the furnace dust removal equipment is not in operation and the iron is not being tapped from the taphole. Both the taphole opening machine 4 and the hydraulic mud gun 3 are connected to the hydraulic pump station 1 via the control valve platform 2.

[0026] Specifically, the taphole opening machine 4 performs taphole opening operations including a preparation and positioning stage, a taphole opening operation stage, and a return to standby position stage. When the blast furnace hearth reaches a safe iron capacity and the taphole needs to be opened for tapping, the hydraulic pump station 1 starts, and the hydraulic system begins to work. The taphole opening machine 4 is hydraulically driven. Under the control of the control valve platform 2, oil is introduced into the rodless chamber of the drill rod clamping cylinder to clamp the drill rod. At the same time, oil is supplied to the rodless chamber of the rotating hydraulic cylinder, and the rotating arm begins to rotate. From the standby position until the trolley rail beam rotates to the tapping position above the main iron trough and stops, oil is then introduced into the rodless chamber of the tilting cylinder, and the drill tilts, so that the anchor hook catches the anchor hook seat and the drill rod is aligned with the taphole. At this point, the preparation and positioning stage of the taphole opening machine 4 is completed. In the taphole opening operation stage, the feed motor rotates forward, driving the trolley to move forward slowly. When the drill rod approaches the taphole, the drilling motor of the vibrating mechanism starts to rotate. When the drill bit touches the taphole, the impactor also starts to work. During the taphole opening process, drilling and impacting occur simultaneously, and the feed motor also feeds slowly. After the taphole is opened, the taphole opener 4 enters the recovery standby position. Under the control of the control valve panel 2, the feed motor rotates rapidly in the reverse direction, causing the trolley to retract quickly. At the same time, the impactor is shut off. When the drill bit is completely withdrawn, the drilling motor stops, oil enters the rod chamber of the tilting cylinder, the anchor hook disengages, the drilling rig is leveled, and then oil is supplied to the rod chamber of the rotary hydraulic cylinder, the rotating arm rotates in the reverse direction, and the taphole opener 4 returns to the standby position. To achieve better timely dust removal and resource conservation, preferably, when the taphole opener 4 enters the taphole opening operation stage, the control unit controls the furnace front dust removal equipment to start and enter the first preset dust removal efficiency working state.

[0027] The hydraulic mud gun 3 performs the plugging operation, which includes a mud-pumping positioning stage, a plugging operation stage, and a return to standby stage. Near the end of blast furnace tapping, the hydraulic mud gun 3, hydraulically driven and controlled by the control valve platform 2, receives oil in the rodless chamber of the rotary cylinder, driving the mud gun body to rotate from the standby position to the taphole and press the nozzle against the mud sleeve. This completes the mud-pumping positioning stage. During the plugging operation stage, oil is supplied to the rodless chamber of the mud-pumping cylinder until the mud-pumping is finished. During this process, the rotary cylinder maintains pressure to keep the mud gun body at the taphole until the plugging operation is complete. After the rotary cylinder maintains pressure for a preset time (the time required for the mud gun body to complete the plugging operation), the hydraulic mud gun 3 enters the return to standby stage. Oil is supplied to the rod chamber of the rotary cylinder, the mud gun body rotates in the opposite direction to the standby position, and oil is supplied to the rod chamber of the mud-pumping cylinder, returning to the mud-loading state. In this embodiment, the preset pressure-holding time of the rotary cylinder is approximately 30 minutes. To achieve better resource conservation, preferably, when the hydraulic mud gun 3 enters the plugging operation stage, the control unit controls the furnace front dust removal equipment to reduce the dust removal efficiency and enter the second preset dust removal efficiency working state.

[0028] According to one embodiment of the present invention, the furnace front dust removal equipment includes a taphole dust removal device, a slag skimmer dust removal device, a trough dust removal device, a slag trough dust removal device, and a chute dust removal device, all electrically connected to the output terminal of the control unit. Specifically, when the taphole machine 4 starts taphole opening operation, the control unit simultaneously controls the taphole dust removal device, slag skimmer dust removal device, trough dust removal device, slag trough dust removal device, and chute dust removal device to open and enter their respective first preset dust removal efficiency working states; when the hydraulic mud gun 3 finishes the taphole blocking operation, the control unit controls the taphole dust removal device, slag skimmer dust removal device, trough dust removal device, slag trough dust removal device, and chute dust removal device to reduce their dust removal efficiency and enter their respective second preset dust removal efficiency working states; when the swing chute 12 finishes the molten iron conveying operation, the control unit controls the taphole dust removal device, slag skimmer dust removal device, trough dust removal device, slag trough dust removal device, and chute dust removal device to close.

[0029] According to a preferred embodiment of the present invention, such as Figure 1As shown, the control unit includes a first control module, a second control module 7, a third control module 8, a fourth control module 9, and a fifth control module. The first control module controls the start-up and shutdown of the taphole dust removal device and its dust removal efficiency; the second control module 7 controls the start-up and shutdown of the skimmer dust removal device and its dust removal efficiency; the third control module 8 controls the start-up and shutdown of the support trough dust removal device and its dust removal efficiency; the fourth control module 9 controls the start-up and shutdown of the slag trough dust removal device and its dust removal efficiency; and the fifth control module controls the start-up and shutdown of the chute dust removal device and its dust removal efficiency. This arrangement allows each control module to be positioned close to the control target, ensuring that operators near the control target can control the device if the automatic control system malfunctions. The control unit also includes a chute swing control module 13 for controlling the swing of the swing chute 12 towards the molten iron conveying side.

[0030] According to a preferred embodiment of the present invention, the iron tap dust removal device includes a top suction dust removal mechanism and a side suction dust removal mechanism. The top suction dust removal mechanism is disposed above the iron tap, and the side suction dust removal mechanisms are disposed on both sides of the iron tap. By providing the top suction dust removal mechanism and the side suction dust removal mechanism above and on both sides of the iron tap, respectively, the dust at the iron tap can be completely covered and removed.

[0031] According to a preferred embodiment of the present invention, such as Figure 1 As shown, the first control module includes a top suction control module 5 electrically connected to the top suction dust removal mechanism and a side suction control module 6 electrically connected to the side suction dust removal mechanism. By setting the top suction control module 5 and the side suction control module 6, the top suction dust removal mechanism and the side suction dust removal mechanism can be controlled separately, so as to achieve targeted and effective dust removal of smoke and dust above and on both sides of the taphole while saving resources.

[0032] According to a preferred embodiment of the present invention, the chute dust removal device includes a first dust removal mechanism and a second dust removal mechanism, which are respectively disposed on both sides of the molten iron discharge end of the oscillating chute 12. This achieves both resource conservation and effective dust removal on the molten iron conveying side.

[0033] According to a preferred embodiment of the present invention, a first molten iron collection line and a second molten iron collection line are respectively arranged on both sides below the oscillating chute 12. Multiple molten iron ladles are arranged on the first and second molten iron collection lines. The first molten iron collection line is arranged on the same side as the first dust removal mechanism, and the second molten iron collection line is arranged on the same side as the second dust removal mechanism, so as to facilitate timely dust removal on the molten iron conveying side of the oscillating chute 12. The first molten iron collection line is equipped with a first weighing device 14 for weighing the molten iron ladle receiving the molten iron from the oscillating chute 12, and the second molten iron collection line is equipped with a second weighing device 15 for weighing the molten iron ladle receiving the molten iron from the oscillating chute 12. Both the first weighing device 14 and the second weighing device 15 are electrically connected to the chute oscillation control module 13. When the molten iron in the ladle at the working position on the first molten iron collection line reaches the set weight, the first weighing device 14 sends a signal to the chute swing control module 13. After receiving the signal, the chute swing control module 13 automatically controls the swing chute 12 to swing towards the side of the second molten iron collection line, transporting the molten iron to the ladle at the working position on the second molten iron collection line. After the molten iron in the ladle at the working position on the second molten iron collection line reaches the set weight, the second weighing device 15 sends a signal to the chute swing control module 13. After receiving the signal, the chute swing control module 13 automatically controls the swing chute 12 to swing towards the side of the first molten iron collection line, transporting the molten iron to the ladle at the working position on the first molten iron collection line. This cycle continues until the molten iron transport is completed.

[0034] According to one embodiment of the present invention, when the oscillating chute 12 tilts downward toward the first molten iron collection line, the fifth control module controls the first dust removal mechanism to increase its dust removal efficiency and controls the second dust removal mechanism to decrease its dust removal efficiency; when the oscillating chute 12 tilts downward toward the second molten iron collection line, the fifth control module controls the second dust removal mechanism to increase its dust removal efficiency and controls the first dust removal mechanism to decrease its dust removal efficiency. Specifically, the amount of dust on the molten iron conveying side of the oscillating chute 12 is greater than that on the non-molten iron conveying side. By correspondingly increasing the dust removal efficiency of the dust removal mechanism on the molten iron conveying side and decreasing the dust removal efficiency of the dust removal mechanism on the non-molten iron conveying side, a better resource-saving effect can be achieved while ensuring the dust removal effect.

[0035] According to a preferred embodiment of the present invention, such as Figure 1 As shown, the fifth control module includes a first chute dust removal control module 10 electrically connected to the first dust removal mechanism and a second chute dust removal control module 11 electrically connected to the second dust removal mechanism. By setting the first chute dust removal control module 10 and the second chute dust removal control module 11, the first dust removal mechanism and the second dust removal mechanism can be controlled separately, so as to achieve targeted and effective dust removal of smoke and dust on both sides of the swing chute 12 while saving resources.

[0036] Another objective of this invention is to provide a blast furnace front dust removal control method, which is implemented using the aforementioned blast furnace front dust removal control system. The method includes: acquiring a taphole start signal from the taphole machine 4; upon acquiring the taphole start signal, the control unit controls the furnace front dust removal equipment to start and enter a first preset dust removal efficiency working state; acquiring a plugging operation stop signal from the hydraulic mud gun 3; upon acquiring the plugging operation stop signal from the hydraulic mud gun 3, the control unit controls the furnace front dust removal equipment to reduce its dust removal efficiency and enter a second preset dust removal efficiency working state; acquiring a molten iron conveying end signal from the oscillating chute 12; and upon acquiring the molten iron conveying end signal from the oscillating chute 12, the control unit controls the furnace front dust removal equipment to shut down. In this way, the control unit realizes the opening and closing status and dust removal efficiency of the furnace front dust removal equipment based on the opening start signal of the taphole machine 4, the plugging stop signal of the hydraulic mud gun 3, and the molten iron conveying end signal of the swing chute 12, so as to achieve the purpose of saving resources and timely automatic control of the furnace front dust removal equipment.

[0037] According to one embodiment of the present invention, when the feed motor of the taphole opener 4 starts feeding, the taphole opener 4 sends a taphole opening operation start signal to the control unit; when the pressure holding of the rotary cylinder of the hydraulic mud gun 3 reaches the preset time requirement, the hydraulic mud gun 3 sends a taphole sealing operation stop signal to the control unit; when the drive assembly of the swing chute 12 stops outputting, the swing chute 12 sends a molten iron conveying end signal to the control unit. By using the feed motor start signal during the taphole opening operation as the taphole opening operation start signal, the rotary cylinder pressure holding reaching the preset time requirement during the taphole sealing operation as the taphole sealing operation stop signal, and the drive assembly of the swing chute 12 stopping outputting as the molten iron conveying end signal, the timeliness of dust removal and resource conservation are further balanced.

[0038] The specific implementation process is as follows: After the blast furnace hearth reaches the safe iron capacity, the hydraulic pump station 1 starts, the hydraulic system begins to work, and the control valve platform 2 controls the taphole machine 4 to perform the taphole opening operation. When the feed motor of the taphole machine 4 starts feeding, the taphole machine 4 simultaneously sends a taphole opening operation start signal to the top suction control module 5, the side suction control module 6, the second control module 7, the third control module 8, the fourth control module 9, the chute swing control module 13, the first chute dust removal control module 10, and the second chute dust removal control module 11. After receiving the taphole opening operation start signal, the top suction control module 5, the side suction control module 6, the second control module 7, the third control module 8, and the fourth control module 9 control the top suction dust removal mechanism, the side suction dust removal mechanism, the slag skimmer dust removal device, the iron support trough dust removal device, and the slag trough dust removal device accordingly. The first chute oscillation control module 13 receives the tapping start signal and controls the oscillating chute 12 to tilt downwards toward the first molten iron collection line, so as to transport the molten iron to the molten iron ladle in the working position on the first molten iron collection line. The first chute dust removal control module 10 receives the tapping start signal and controls the first dust removal mechanism to increase the dust removal efficiency to ensure the dust removal effect on the molten iron conveying side. The second chute dust removal control module 11 receives the tapping start signal and controls the second dust removal mechanism to decrease the dust removal efficiency to balance the dust removal effect on the non-molten iron conveying side and resource conservation. After the tapping is opened, the tapping machine 4 enters the recovery standby position stage, and the feed motor quickly reverses the rotation to return the tapping machine 4 to the standby position.

[0039] When the molten iron in the ladle at the working position on the first molten iron collection line reaches the set weight, the first weighing device 14 sends a signal to the chute swing control module 13. After receiving the signal, the chute swing control module 13 automatically controls the swing chute 12 to swing towards the second molten iron collection line, transporting the molten iron to the ladle at the working position on the second molten iron collection line. After the molten iron in the ladle at the working position on the second molten iron collection line reaches the set weight, the second weighing device 15 sends a signal to the chute swing control module 13. After receiving the signal, the chute swing control module 13 automatically controls the swing chute 12 to swing towards the first molten iron collection line, transporting the molten iron to the ladle at the working position on the first molten iron collection line. This cycle continues until the molten iron transport is completed.

[0040] As the blast furnace tapping nears completion, control valve 2 controls the hydraulic mud gun 3 to perform the plugging operation. When the hydraulic mud gun 3 enters the plugging stage, oil is introduced into the rodless chamber of the mud-applying cylinder until the plugging is completed. During the plugging operation, the rotating cylinder maintains pressure to keep the mud gun body stationary at the tapping opening for stable plugging. After the hydraulic mud cannon 3's rotating cylinder holds pressure for the preset time, oil enters the rod chamber of the rotating cylinder, the mud cannon body rotates in the opposite direction to the standby position, oil enters the rod chamber of the mud-discharging cylinder, and the mud-loading state is restored. At the same time, the hydraulic mud cannon 3 sends a blocking operation stop signal to the top suction control module 5, side suction control module 6, second control module 7, third control module 8, fourth control module 9, first chute dust removal control module 10, and second chute dust removal control module 11. After receiving the blocking operation stop signal, the top suction control module 5, side suction control module 6, second control module 7, third control module 8, fourth control module 9, first chute dust removal control module 10, and second chute dust removal control module 11 control the top suction dust removal mechanism, side suction dust removal mechanism, slag skimmer dust removal device, iron support trough dust removal device, slag trough dust removal device, first dust removal mechanism, and second dust removal mechanism to reduce the dust removal efficiency and enter their respective second preset dust removal efficiency working states.

[0041] When the entire tapping process ends, the drive assembly of the swing chute 12 stops outputting. Simultaneously, the chute swing control module 13 sends an iron conveying end signal to the top suction control module 5, the side suction control module 6, the second control module 7, the third control module 8, the fourth control module 9, the first chute dust removal control module 10, and the second chute dust removal control module 11. After receiving the stop signal for the plugging operation, the top suction control module 5, the side suction control module 6, the second control module 7, the third control module 8, the fourth control module 9, the first chute dust removal control module 10, and the second chute dust removal control module 11 control the top suction dust removal mechanism, the side suction dust removal mechanism, the slag skimmer dust removal device, the iron support trough dust removal device, the slag trough dust removal device, the first dust removal mechanism, and the second dust removal mechanism to shut down accordingly.

[0042] Based on the above description, the blast furnace front dust removal control system and method provided in this application have the following beneficial effects:

[0043] The blast furnace dust removal control system provided in this application embodiment achieves automatic control of the opening and closing status and dust removal efficiency of the furnace front dust removal equipment based on the start and stop of operation of the taphole machine 4, hydraulic mud gun 3, and swing chute 12 through signal transmission with the control unit. This solves the problems of inconvenient opening and closing operation and untimely dust removal of the furnace front dust removal equipment, while also achieving resource conservation. Furthermore, by setting a first dust removal mechanism and a second dust removal mechanism on both sides of the swing chute 12, the dust removal efficiency of the dust removal mechanism on the side conveying molten iron is increased and the dust removal efficiency of the dust removal mechanism on the side not conveying molten iron is decreased accordingly. Thus, while ensuring the dust removal effect, better resource conservation effect is achieved.

[0044] The blast furnace dust removal control method provided in this application uses a control unit to control the opening and closing status and dust removal efficiency of the furnace dust removal equipment based on the tap opening start signal of the tap opening machine 4, the plugging stop signal of the hydraulic mud gun 3, and the molten iron conveying end signal of the swing chute 12. This achieves the goal of both saving resources and timely automatic control of the furnace dust removal equipment.

[0045] The above descriptions are merely a few embodiments of the present invention. Those skilled in the art can make various modifications or variations to the embodiments of the present invention based on the content disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A dust removal control system for blast furnace front, characterized in that, The system includes a taphole opener, a hydraulic mud gun, a swing chute, a furnace front dust removal device, and a control unit. The taphole opener is used to open the blast furnace taphole, the hydraulic mud gun is used to seal the blast furnace taphole after tapping is completed, and the swing chute is used to receive the molten iron flowing from the iron trough and send it into the molten iron ladle. The furnace-front dust removal equipment is electrically connected to the taphole opening machine, the hydraulic mud gun, and the oscillating chute via the control unit. When the taphole opening machine starts taphole opening operation, the control unit controls the furnace-front dust removal equipment to turn on and enter the first preset dust removal efficiency working state. When the hydraulic mud gun finishes its taphole blocking operation, the control unit controls the furnace-front dust removal equipment to reduce its dust removal efficiency and enter the second preset dust removal efficiency working state. When the oscillating chute finishes its molten iron conveying operation, the control unit controls the furnace-front dust removal equipment to turn off.

2. The blast furnace dust removal control system according to claim 1, characterized in that, The furnace front dust removal equipment includes a taphole dust removal device, a slag skimmer dust removal device, a support trough dust removal device, a slag trough dust removal device, and a chute dust removal device, all electrically connected to the output end of the control unit.

3. The blast furnace front dust removal control system according to claim 2, characterized in that, The control unit includes a first control module, a second control module, a third control module, a fourth control module, and a fifth control module. The first control module is used to control the start-up and shutdown of the iron tap dust removal device and its dust removal efficiency; the second control module is used to control the start-up and shutdown of the slag skimmer dust removal device and its dust removal efficiency; the third control module is used to control the start-up and shutdown of the iron support trough dust removal device and its dust removal efficiency; the fourth control module is used to control the start-up and shutdown of the slag trough dust removal device and its dust removal efficiency; and the fifth control module is used to control the start-up and shutdown of the chute dust removal device and its dust removal efficiency.

4. The blast furnace front dust removal control system according to claim 3, characterized in that, The iron tap dust removal device includes a top suction dust removal mechanism and a side suction dust removal mechanism. The top suction dust removal mechanism is located above the iron tap, and the side suction dust removal mechanism is located on both sides of the iron tap.

5. The blast furnace front dust removal control system according to claim 4, characterized in that, The first control module includes a top suction control module electrically connected to the top suction dust removal mechanism and a side suction control module electrically connected to the side suction dust removal mechanism.

6. The blast furnace front dust removal control system according to claim 3 or 5, characterized in that, The dust removal device for the chute includes a first dust removal mechanism and a second dust removal mechanism, which are respectively located on both sides of the iron outlet of the oscillating chute.

7. The blast furnace front dust removal control system according to claim 6, characterized in that, A first molten iron collection line and a second molten iron collection line are respectively arranged on both sides below the swing nozzle. Multiple molten iron ladles are arranged on the first molten iron collection line and the second molten iron collection line. The first molten iron collection line is arranged on the same side as the first dust removal mechanism, and the second molten iron collection line is arranged on the same side as the second dust removal mechanism.

8. The blast furnace front dust removal control system according to claim 7, characterized in that, When the oscillating chute tilts downward toward the first molten iron collection line, the fifth control module controls the first dust removal mechanism to increase the dust removal efficiency and controls the second dust removal mechanism to decrease the dust removal efficiency; when the oscillating chute tilts downward toward the second molten iron collection line, the fifth control module controls the second dust removal mechanism to increase the dust removal efficiency and controls the first dust removal mechanism to decrease the dust removal efficiency.

9. The blast furnace front dust removal control system according to claim 8, characterized in that, The fifth control module includes a first chute dust removal control module electrically connected to the first dust removal mechanism and a second chute dust removal control module electrically connected to the second dust removal mechanism.

10. A method for controlling dust removal in front of a blast furnace, characterized in that, The blast furnace front dust removal control method is implemented using the blast furnace front dust removal control system as described in any one of claims 1 to 9, including: Obtain the start signal for the tapping operation of the tapping machine; After receiving the tapping machine's tapping start signal, the control unit controls the furnace front dust removal equipment to start and enter the first preset dust removal efficiency working state based on the tapping machine's tapping start signal. Obtain the shutdown signal for the plugging operation of the hydraulic mud gun; After receiving the shutdown signal of the hydraulic mud gun's plugging operation, the control unit controls the furnace front dust removal equipment to reduce the dust removal efficiency and enter the second preset dust removal efficiency working state based on the shutdown signal of the hydraulic mud gun's plugging operation. Obtain the end signal of molten iron delivery from the oscillating chute; After receiving the end signal of molten iron conveying from the oscillating chute, the control unit controls the furnace front dust removal equipment to shut down based on the end signal of molten iron conveying from the oscillating chute.

11. The blast furnace dust control method according to claim 10, characterized in that, When the feed motor of the taphole opener starts feeding, the taphole opener sends a taphole opening operation start signal to the control unit; when the hydraulic mud gun's rotating cylinder holds pressure for a preset time, the hydraulic mud gun sends a taphole blocking operation stop signal to the control unit; when the drive assembly of the swing chute stops outputting, the swing chute sends an iron conveying end signal to the control unit.

Images