A ladle nozzle drainage sand filling system and its use method

Abstract

The present invention discloses a ladle nozzle drainage sand filling system and its use method, comprising a ladle car positioning system, a ladle nozzle, a silo system, a sand adding system, a first platform, a second platform, and a third platform; the ladle car positioning system comprises a ladle, a ladle car, a distance measuring device, and a track; the silo system comprises a heating silo, a vibrating feeder, a weighing device, and a flap valve placed on the first platform, and a collecting hopper and a rotary chute placed on the second platform; wherein, multiple heating silos are provided for storing different types of drainage sand; the sand adding system comprises a feeding pipe, a reducer, a motor, an encoder, a crank, a connecting rod, a locking rod, and a guide sleeve, and the center of the feeding pipe coincides with the center of the ladle nozzle. The present invention can achieve precise positioning of the ladle car and accurately control the type and amount of drainage sand added, which is beneficial to improving the ladle nozzle sand filling effect and the ladle pouring self-priming rate, reducing steelmaking production costs and labor intensity.

Description

Technical Field

[0001] The invention relates to the technical field of converter steelmaking equipment, in particular to a ladle nozzle drainage sand filling system and a use method thereof. Background Art

[0002] Drainage sand, also known as drainage agent, is a loose refractory material filled into the ladle base bricks and upper nozzle. To prevent the molten steel from freezing at the ladle nozzle, drainage sand must be pre-filled into the ladle nozzle before tapping from the converter. The drainage sand poured into the ladle nozzle and base bricks is required to form a dune-like protrusion on the upper surface of the base bricks. The mechanism of action of the drainage sand is as follows: during the initial injection of molten steel into the ladle, the drainage sand on the upper surface of the nozzle rapidly sinters upon contact with the molten steel, hindering its penetration. Supported by the drainage sand below, the sintered layer can withstand the static pressure of the molten steel without being destroyed. Simultaneously, the sintering rate of the drainage sand slows, maintaining a certain thickness. However, during pouring, the unsintered drainage sand at the bottom falls under its own weight, causing the sintered layer to lose its support and shatter under the weight of the molten steel, allowing pouring to begin. In actual production, the filling efficiency of drainage sand is a key factor affecting the ladle's self-priming performance. Overfilling results in an excessively thick sintered layer; underfilling allows molten steel to easily penetrate the sand, both of which reduce the sand's self-priming efficiency. Currently, some domestic steel mills use a manual sand-throwing method. After hot repairs are completed, the ladle is flipped, and a person from above drops bags of drainage sand onto the nozzle block. This filling method has the following drawbacks: high labor intensity; inaccurate throwing; insufficient filling of the drainage sand into the upper nozzle; and adding the plastic bag into the upper nozzle, where the plastic bag melts and clumps at high temperatures, mixing with the drainage sand and reducing its fluidity, which can easily clog the nozzle. Alternatively, some steel mills use a tube-filling method for drainage sand. Similar to manual sand-throwing, after hot repairs are completed, the ladle is flipped, and a tube is used to drop the drainage sand directly above the nozzle block to complete the filling process. This method can ensure the accuracy of drainage sand placement, but when pouring the drainage sand into the water inlet, it is necessary to slowly lift the catheter to make the drainage sand accumulate into a spherical crown shape on the water inlet seat brick at the bottom of the bag, and the operation requirements are relatively high. In addition, some steel mills have specially developed mechanical equipment to assist in the sand filling operation in order to improve the accuracy of drainage sand placement, which costs a lot of money and the equipment is relatively complex.

[0003] A search revealed that Chinese patent number CN 117531988 A discloses an automatic drainage sand addition device and method. The device comprises a funnel-shaped primary silo, a secondary silo below the primary silo, and a funnel-shaped secondary silo with a sliding chute trolley below the secondary silo. A guide cone is positioned below the sliding chute trolley. The guide cone cooperates with a sand adding pipe, the upper end of which is fixed to the lower end of the funnel. The funnel is fixed to one end of a steel wire rope, and the other end of the steel wire rope is connected to a drive motor. This device reduces labor costs, precisely controls the addition time and amount of drainage sand, improves the ladle's self-opening rate, and reduces the impact of oxygen burning on molten steel quality. It addresses the existing issues of unsafe addition methods and difficult to control addition accuracy. However, this device still has the following shortcomings: 1) Due to the different steel grades used in converters, the required molten steel refining time varies, and the requirements for the type and quality of drainage sand at the ladle nozzle also vary. The device does not fully consider the requirements of different types of molten steel for the type and quality of drainage sand. A single silo cannot meet the requirements of adding different types of drainage sand to smelt different grades of steel; 2) An electric heating wire is used to preheat the drainage sand to remove moisture, which has the disadvantage of uneven heating; 3) A motor is used to drive the wire rope to drive the funnel to achieve the lifting and lowering of the sand adding tube. Because the wire rope is under long-term stress, it becomes loose, affecting the accuracy of the lifting and lowering stroke of the sand adding tube, and thus cannot guarantee the required distance between the lower end of the sand adding tube and the ladle water inlet; 4) The device uses a limit switch to position the ladle car. Affected by the splashing of argon slag during molten steel blowing, the ladle car's travel limit switch is easily damaged, affecting the accurate positioning of the ladle car, and cannot ensure that the lower end of the sand adding tube is directly above the ladle water inlet, thus affecting the sand filling effect. Summary of the Invention

[0004] The purpose of the present invention is to provide a ladle water inlet drainage sand filling system and a method of using the same, which can realize the precise positioning of the ladle car and accurately control the type and amount of drainage sand added, which is beneficial to improving the ladle water inlet sand filling effect and the ladle self-priming rate, reducing the steelmaking production cost and the labor intensity of the sand adding operation, so as to solve the problems in the prior art such as inaccurate ladle positioning and drainage sand dosage, high labor intensity of the sand adding operation, and poor self-priming rate of the ladle when pouring.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A ladle water inlet drainage sand filling system, comprising a ladle car positioning system, a ladle water inlet, a hopper system, a sand adding system, a first platform, a second platform and a third platform; the hopper system comprises a heating hopper, a vibrating feeder, a weighing device, a flap valve, a collecting hopper and a rotating chute; the heating hopper, vibrating feeder, weighing device, flap valve are placed on the first platform, and the collecting hopper and the rotating chute are placed on the second platform; the sand adding system comprises a feeding pipe, a reducer, a motor, an encoder, a crank, a connecting rod, a locking rod and a guide sleeve; the reducer, the motor and the encoder are placed on the second platform, and the crank, connecting rod and locking rod constitute an operating mechanism, one end of the crank is assembled and connected to the reducer, the other end of the crank is connected to the connecting rod through a pin, the other end of the connecting rod is connected to one side of the locking rod through a pin, the other side of the locking rod is fixed to the feeding pipe, the feeding pipe is placed in the guide sleeve, the guide sleeve is placed on the third platform for constraining and guiding the feeding pipe, and the discharge port of the feeding pipe is docked with the ladle water inlet.

[0007] Furthermore, the ladle car positioning system includes a ladle, a ladle car, a distance measuring device and a track; the ladle is placed on the ladle car, and the ladle car runs on the track. The track is located between the factory columns on both sides, and multiple distance measuring devices are installed on the factory columns for real-time measurement of the position of the ladle car.

[0008] Furthermore, the center of the ladle nozzle on the ladle coincides with the center of the feeding pipe.

[0009] Furthermore, the heating silo is provided with multiple ones for storing different types of drainage sand. The heating silo includes a silo, an ignition and nozzle device, a feeding port and a gas medium pipeline. Different types of drainage sand enter the silo through the feeding port. A gas medium pipeline is arranged around the silo. The gas medium pipeline is connected to the ignition and nozzle device. The different types of drainage sand stored in the silo are baked online through the ignition and nozzle device.

[0010] Furthermore, the heating silo is also provided with a fume recovery device, which is located above the silo and is used to collect fume generated by baking the drainage sand.

[0011] Furthermore, a vibrating feeder is provided at the discharge port below the silo, a weighing device is provided below the vibrating feeder, a flap valve is provided below the weighing device, a collecting hopper is provided at the lower end of the flap valve, the collecting hopper is used to hold drainage sand stored in different silos, a rotating chute is provided at the discharge port of the collecting hopper, and the discharge port of the rotating chute is connected to the feeding pipe.

[0012] Furthermore, the reducer adopts a large speed ratio, the motor adopts a built-in brake, the encoder adopts a counting encoder, and the encoder, motor, ladle car, and distance measuring device are all controlled by PLC.

[0013] The present invention provides another technical solution: a method for using a ladle nozzle drainage sand filling system, comprising the following steps:

[0014] S1: Material preparation: Place a certain amount of different types of drainage sand in multiple silos, open the gas valve, and burn the gas at the ignition and nozzle device through the gas medium pipeline. The high calorific value of the gas combustion bakes the drainage sand stored in the silo, and the smoke recovery device recovers the baking smoke;

[0015] S2: Automatic movement and positioning of ladle: After the ladle car is placed on the track and the ladle is placed on the ladle saddle of the ladle car, the ladle car automatic positioning system is turned on. The ladle car automatically moves, and its real-time position is recorded and fed back by the distance measuring devices installed on the columns at both ends of the plant. When the distance measuring device detects that the ladle car has reached the preset position, the ladle car automatically stops to ensure that the center of the feeding pipe coincides with the center of the ladle water outlet. The monitoring result signal is fed back to the silo system through the distance measuring device.

[0016] S3: Selection of drainage sand type and quantity: When the silo system receives the ladle car positioning stop signal fed back by the distance measuring device, it automatically selects and starts the vibrating feeder corresponding to the heating silo in the silo system to discharge the drainage sand according to the process requirements of the smelting steel grade on the type and amount of drainage sand, and weighs the discharged drainage sand through the weighing device; when the weight of the drainage sand reaches the preset weight, the weighing device feeds back the weighing result to the vibrating feeder, which automatically stops vibrating and feeds back the stop vibration signal to the sand adding system;

[0017] S4: The feeding pipe descends from the waiting position to the working position: When the sand feeding system receives the vibration stop signal from the vibrating feeder, the motor is automatically turned on, the motor runs, the reducer outputs at a low speed, drives the crank to rotate, and then drives the connecting rod to move up and down, and drives the feeding pipe to move vertically downward from the waiting position through the locking rod. When the encoder detects the set number of circles, the motor stops rotating and brakes, and the lower end of the feeding pipe stays at the preset position just above the ladle nozzle;

[0018] S5: Sand adding operation: When the feeding pipe stays at the set working position, the motor stop signal is fed back to the rotary chute in the silo system, and the rotary chute automatically rotates from the waiting position to the working position, so that the lower end of the rotary chute is placed directly above the funnel at the upper end of the feeding pipe. When the rotary chute rotates to the working position, the stop signal is fed back to the flap valve in the silo system, and the flap valve is opened to place the weighed quantitative drainage sand into the collecting hopper, and the sand adding operation at the ladle nozzle is realized through the rotary chute and the feeding pipe;

[0019] S6: The feeding pipe rises from the working position to the waiting position: When the sand adding operation is completed, the rotary chute automatically rotates from the working position to the waiting position, the motor reverses, the reducer outputs at a low speed, drives the crank to rotate, and then drives the connecting rod to move up and down, and drives the feeding pipe to move vertically upward from the working position through the locking rod. When the encoder detects the set number of circles, the motor stops rotating and brakes to ensure that the feeding pipe stays in the working position;

[0020] S7: Ladle receiving molten steel: When the feeding pipe stops at the working position, the ladle car moves automatically, and the real-time position of the ladle car is monitored by the distance measuring device. When the ladle car moves to the preset position under the converter furnace, the ladle car automatically stops at the ladle receiving molten steel position, thereby creating conditions for tapping the converter.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. A ladle inlet drainage sand filling system and its use method of the present invention can achieve precise positioning of the ladle car by adding a distance measuring device to the ladle positioning system, effectively solving the problem of difficult positioning operation of the ladle car during manual sand filling.

[0023] 2. The present invention provides a ladle nozzle drainage sand filling system and a method for using the same. A heating silo and a weighing device are provided in the silo system to effectively remove moisture from the drainage sand, improve the ladle's self-priming rate during pouring, and achieve the purpose of quantitatively adding drainage sand. Compared with conventional manual sand filling methods, the ladle's self-priming rate during pouring is increased from 92.3% to 99.5%, and the drainage sand consumption is reduced from 0.38kg / t steel to 0.23kg / t steel.

[0024] 3. The present invention provides a ladle nozzle drainage sand filling system and a method of using the same. The sand adding system adopts a crank slider mechanism to accurately control the lifting and lowering of the feeding pipe. The system has strong rigidity and is not easy to deform. It is not only suitable for high temperature and dusty environments, but also has accurate up and down movement positions, which facilitates and reliably adds drainage sand, and effectively solves the defects and shortcomings of traditional wire rope running mechanisms, such as loose wire rope and easy breakage.

[0025] 4. The ladle nozzle drainage sand filling system and its use method of the present invention have a high degree of automation, precise control, safety and reliability through the coordinated cooperation of various systems, and can effectively reduce steelmaking production costs and the labor intensity of sand adding operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the overall system structure of the present invention;

[0027] Figure 2 This is a structural diagram of the ladle car positioning system of the present invention;

[0028] Figure 3 It is a schematic structural diagram of the silo system of the present invention;

[0029] Figure 4 This is a schematic diagram of the heating silo structure of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the sand adding system of the present invention.

[0031] In the figure: 1. Ladle car positioning system; 11. Ladle; 12. Ladle car; 13. Distance measuring device; 14. Track; 2. Ladle nozzle; 3. Silo system; 31. Heating silo; 311. Silo; 312. Ignition and nozzle device; 313. Flue gas recovery device; 314. Feeding port; 315. Gas medium pipeline; 32. Vibrating feeder; 33. Weighing device; 34. Flap valve; 35. Collecting hopper; 36. Rotary chute; 4. Sand adding system; 41. Feeding pipe; 42. Reducer; 43. Motor; 44. Encoder; 45. Crank; 46. Connecting rod; 47. Locking rod; 48. Guide sleeve; 5. First platform; 6. Second platform; 7. Third platform. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figure 1-5In order to solve the problems of inaccurate ladle positioning and drainage sand dosage, high labor intensity of sand adding operation, poor self-priming rate of ladle pouring, etc. in the prior art, a ladle nozzle drainage sand filling system is provided in the embodiment of the present invention, comprising a ladle car positioning system 1, a ladle nozzle 2, a silo system 3, a sand adding system 4, a first platform 5, a second platform 6 and a third platform 7; the silo system 3 comprises a heating silo 31, a vibrating feeder 32, a weighing device 33, a flap valve 34, a collecting hopper 35 and a rotary chute 36; the heating silo 31, the vibrating feeder 32, the weighing device 33, the flap valve 34 are placed on the first platform 5, and the collecting hopper 35 and the rotary chute 36 are placed on the second platform 6; the sand adding system 4 comprises a adding silo The feed pipe 41, the reducer 42, the motor 43, the encoder 44, the crank 45, the connecting rod 46, the locking rod 47 and the guide sleeve 48; the reducer 42, the motor 43 and the encoder 44 are placed on the second platform 6, and the crank 45, the connecting rod 46 and the locking rod 47 constitute an operating mechanism. One end of the crank 45 is assembled and connected to the reducer 42, and the other end of the crank 45 is connected to the connecting rod 46 through a pin shaft. The other end of the connecting rod 46 is connected to one side of the locking rod 47 through a pin shaft. The other side of the locking rod 47 is fixed to the feeding pipe 41. The feeding pipe 41 is placed in the guide sleeve 48, and the guide sleeve 48 is placed on the third platform 7 for constraining and guiding the feeding pipe 41. The discharge port of the feeding pipe 41 is docked with the ladle water nozzle 2.

[0034] In the above embodiment, the ladle car positioning system 1 includes a ladle 11, a ladle car 12, a distance measuring device 13 and a track 14; the ladle 11 is placed on the ladle car 12, and the ladle car 12 runs on the track 14. The track 14 is located between the factory columns on both sides, and multiple distance measuring devices 13 are installed on the factory columns. The distance measuring device 13 uses the laser ranging principle to measure the position of the ladle car 12 in real time, and controls the start and stop of the ladle car 12 drive motor by feeding back the measurement result signal to the PLC. When the ladle car 12 moves to the preset position, the ladle car 12 stops moving, so that the center of the ladle nozzle 2 of the ladle 11 placed on the ladle car 12 coincides with the center of the feeding pipe 41, thereby achieving precise positioning.

[0035] In the above embodiment, the heating silo 31 is provided with multiple silos for storing different types of drainage sand to meet the metallurgical requirements of different steel grades for the types of drainage sand; specifically, the heating silo 31 includes a silo 311, an ignition and nozzle device 312, a feeding port 314 and a fuel gas medium pipeline 315; different types of drainage sand enter the silo 311 through the feeding port 314, and a fuel gas medium pipeline 315 is arranged around the silo 311, and the fuel gas medium pipeline 315 is connected to the ignition and nozzle device 312. The different types of drainage sand stored in the silo 311 are baked online through the ignition and nozzle device 312 to remove moisture from the drainage sand and prevent the drainage sand from getting damp and clumping, resulting in problems such as poor material discharge and poor sintering performance; a flue gas recovery device 313 is also provided on the heating silo 31. The flue gas recovery device 313 is located above the silo 311 and is used to collect flue gas generated by baking the drainage sand to avoid environmental pollution.

[0036] A vibrating feeder 32 is provided at the discharge port below the silo 311 in the embodiment of the present invention, a weighing device 33 is provided below the vibrating feeder 32, and a flap valve 34 is provided below the weighing device 33, which can realize quantitative control according to the requirement of the ladle water outlet 2 for the amount of drainage sand, so as to save the steelmaking production cost; a collecting hopper 35 is provided at the lower end of the flap valve 34, and the collecting hopper 35 is used to hold the drainage sand stored in different silos 311, which can meet the process requirements of smelting different grades of steel for the selection of drainage sand types, and the discharge port of the collecting hopper 35 is provided with a rotating chute 36, and the discharge port of the rotating chute 36 is connected to the feeding pipe 41. The rotating chute 36 can make different types of drainage sand smoothly added into the feeding pipe 41, thereby realizing the sand adding operation of the ladle water outlet 2.

[0037] In the above embodiment, the sand feeding system 4 uses the crank slider working principle to achieve the raising and lowering of the feeding tube 41. The reducer 42 uses a large speed ratio, the motor 43 uses a built-in brake, and the encoder 44 uses a counting encoder. This realizes the functions of the reducer 42 outputting a low speed, the motor 43 accurately positioning, and the encoder 44 providing counting feedback, thereby accurately controlling the actual height of the feeding tube 41. During actual operation, the motor 43 runs, the reducer 42 outputs a low speed, driving the crank 45 to rotate, which in turn drives the connecting rod 46 to move up and down, and drives the feeding tube 41 up and down through the locking rod 47. When the encoder 44 detects the set number of revolutions, the motor 43 stops and brakes, so that the feeding tube 41 is securely held in the set working position.

[0038] In order to further better explain the embodiments of the present invention, a method for using a ladle nozzle drainage sand filling system is also provided, comprising the following steps:

[0039] Step 1: Material Preparation: A certain amount of different types of drainage sand is placed in multiple silos 311. The gas valve is opened, and the gas is burned at the ignition and nozzle device 312 through the fuel gas medium pipeline 315. The high calorific value of the gas burns the drainage sand stored in the silos 311 to remove moisture from the drainage sand, thereby improving the self-priming rate of the ladle pouring. The smoke recovery device 313 recovers the baking smoke to avoid pollution to the environment.

[0040] Step 2: Automatic movement and positioning of the ladle: During normal production, the ladle car 12 is placed on the track 14, and the ladle 11 is placed on the ladle saddle of the ladle car 12. The automatic positioning system of the ladle car 12 is turned on, and the ladle car 12 moves automatically. Its real-time position is recorded and fed back by the distance measuring devices 13 installed on the columns at both ends of the factory building; when the distance measuring device 13 detects that the ladle car 12 has reached the preset position, the ladle car 12 automatically stops to ensure that the center of the feeding pipe 41 coincides with the center of the ladle nozzle 2, and the monitoring result signal is fed back to the silo system 3 through the distance measuring device 13;

[0041] Step 3: Selection of drainage sand type and quantity: When the silo system 3 receives the positioning stop signal of the ladle car 12 fed back by the distance measuring device 13, it automatically selects and starts the vibrating feeder 32 corresponding to the heating silo 31 in the silo system 3 to vibrate and discharge the sand according to the process requirements of the smelting steel grade for the type and amount of drainage sand, and weighs the discharged drainage sand through the weighing device 33; when the weight of the drainage sand reaches the preset weight, the weighing device 33 feeds back the weighing result to the vibrating feeder 32, and the vibrating feeder 32 automatically stops vibrating and discharges the sand, and feeds back the stop vibration signal to the sand adding system 4;

[0042] Step 4: The feeding pipe is lowered from the waiting position to the working position: When the sand feeding system 4 receives the vibration stop signal of the vibrating feeder 32, the motor 43 is automatically turned on, the motor 43 runs, and the reducer 42 outputs at a low speed, driving the crank 45 to rotate, thereby driving the connecting rod 46 to move up and down, and driving the feeding pipe 41 to perform a vertical downward movement from the waiting position through the locking rod 47. When the encoder 44 detects the set number of revolutions, the motor 43 stops rotating and brakes, and the lower end of the feeding pipe 41 stays at the preset position just above the ladle nozzle 2;

[0043] Step 5: Sand adding operation: When the feeding pipe 41 stays at the set working position, the motor 43 stops and a signal is fed back to the rotary chute 36 in the silo system 3. The rotary chute 36 automatically rotates from the waiting position to the working position, so that the lower end of the rotary chute 36 is placed just above the funnel at the upper end of the feeding pipe 41, so that the drainage sand can be added into the funnel of the feeding pipe 41. When the rotary chute 36 rotates to the working position, a stop signal is fed back to the flap valve 34 in the silo system 3, and the flap valve 34 is opened to place the weighed quantitative drainage sand into the collecting hopper 35. The sand adding operation of the ladle nozzle 2 is realized through the rotary chute 36 and the feeding pipe 41.

[0044] Step 6: The feeding tube rises from the working position to the waiting position: When the sand adding operation is completed, the rotating chute 36 automatically rotates from the working position to the waiting position, the motor 43 reverses, and the reducer 42 outputs at a low speed, driving the crank 45 to rotate, thereby driving the connecting rod 46 to move up and down, and driving the feeding tube 41 to move vertically upward from the working position through the locking rod 47. When the encoder 44 detects the set number of revolutions, the motor 43 stops rotating and brakes to ensure that the feeding tube 41 stays in the working position;

[0045] Step 7: The ladle receives the molten steel: When the feeding pipe 41 stops at the working position, the ladle car 12 moves automatically, and the real-time position of the ladle car 12 is monitored by the distance measuring device 13. When the ladle car 12 moves to the preset position under the converter furnace, the ladle car 12 automatically stops at the ladle receiving molten steel position, thereby creating conditions for the converter to tap steel.

[0046] To sum up: the present invention provides a ladle water inlet drainage sand filling system and its use method, through the set ladle car positioning system 1, silo system 3 and sand adding system 4, each system is highly integrated and coordinated, which can effectively solve the problems of inaccurate ladle positioning and drainage sand dosage, high labor intensity of sand adding operation, poor self-priming rate of ladle pouring, etc. in the prior art, which is beneficial to improving the ladle water inlet sand filling effect and the ladle pouring self-priming rate, and reducing steelmaking production costs and the labor intensity of sand adding operation. Specifically, in the ladle positioning system 1 of the present invention, by adding a distance measuring device 13, the ladle car 12 can be accurately positioned to ensure that the center of the drainage sand feeding pipe 41 coincides with the center of the ladle water inlet 2, effectively solving the problem of difficult positioning operation of the ladle car during manual sand filling; secondly, a plurality of heating silos 31 are provided in the silo system 3, and a gas baking and fume recovery device is added to the heating silo 31. The characteristics of high combustion calorific value and good baking effect of gas can effectively remove moisture from the drainage sand, avoid the drainage sand being affected by moisture and affecting the feeding and sintering performance, and avoid the environmental pollution problem caused by the fume generated by baking; moreover, in the silo system 3, the hopper A rotating chute 36 is added to the lower end of the discharge port 35, which allows different types of drainage sand to be smoothly added to the feeding pipe 41, thereby realizing the sand adding operation of the ladle nozzle 2; in addition, the sand adding system 4 is provided with a crank-connecting rod mechanism, which can be controlled by a motor 43, a reducer 42 and an encoder 44. According to the height of the working platform from the ladle nozzle 2 and the length of the feeding pipe 41, the relevant parameters of the crank 45 and the connecting rod 46 are reasonably set, and the number of motor revolutions is controlled by the encoder 44, which can accurately control the lifting and lowering of the feeding pipe 41, avoiding the problem of the traditional motor-driven wire rope controlling the lifting of the feeding pipe, which is caused by the looseness of the wire rope and thus affects the lifting and lowering control accuracy of the feeding pipe.

[0047] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A ladle nozzle drainage sand filling system, characterized in that: The invention comprises a ladle car positioning system (1), a ladle water outlet (2), a silo system (3), a sand adding system (4), a first platform (5), a second platform (6) and a third platform (7); the silo system (3) comprises a heating silo (31), a vibrating feeder (32), a weighing device (33), a flap valve (34), a collecting hopper (35) and a rotating chute (36); the heating silo (31), the vibrating feeder (32), the weighing device (33) and the flap valve (34) are placed on the first platform (5), and the collecting hopper (35) and the rotating chute (36) are placed on the second platform (6); the sand adding system (4) comprises a feeding pipe (41), a reducer (42), a motor (43), an encoder (44), a crank (45), a connecting rod (46), a locking rod (47) and guide sleeve (48); the encoder (44) is a counting encoder, the reducer (42), the motor (43) and the encoder (44) are placed on the second platform (6), the crank (45), the connecting rod (46) and the locking rod (47) form a running mechanism, one end of the crank (45) is assembled and connected to the reducer (42), the other end of the crank (45) is connected to the connecting rod (46) through a pin, the other end of the connecting rod (46) is connected to one side of the locking rod (47) through a pin, the other side of the locking rod (47) is fixed to the feeding pipe (41), the feeding pipe (41) is placed in the guide sleeve (48), the guide sleeve (48) is placed on the third platform (7), and is used to constrain and guide the feeding pipe (41), and the discharge port of the feeding pipe (41) is docked with the ladle water nozzle (2); The ladle car positioning system (1) comprises a ladle (11), a ladle car (12), a distance measuring device (13) and a track (14); the ladle (11) is placed on the ladle car (12), the ladle car (12) runs on the track (14), the track (14) is located between the plant columns on both sides, and a plurality of distance measuring devices (13) are installed on the plant columns for real-time measurement of the position of the ladle car (12); The heating silo (31) is provided with a plurality of silos for storing different types of drainage sand. The heating silo (31) includes a silo (311), an ignition and nozzle device (312), a feeding port (314), and a fuel gas medium pipeline (315). Different types of drainage sand enter the silo (311) through the feeding port (314). A fuel gas medium pipeline (315) is arranged around the silo (311). The fuel gas medium pipeline (315) is connected to the ignition and nozzle device (312). The different types of drainage sand stored in the silo (311) are baked online through the ignition and nozzle device (312). The heating silo (31) is further provided with a fume recovery device (313), which is located above the silo (311) and is used to collect fume generated by baking the drainage sand.

2. The ladle nozzle drainage sand filling system according to claim 1, characterized in that: The center of the ladle nozzle (2) on the ladle (11) coincides with the center of the feeding pipe (41).

3. The ladle nozzle drainage sand filling system according to claim 1, characterized in that: A vibrating feeder (32) is provided at the discharge port below the silo (311), a weighing device (33) is provided below the vibrating feeder (32), a flap valve (34) is provided below the weighing device (33), a collecting hopper (35) is provided at the lower end of the flap valve (34), and the collecting hopper (35) is used to receive drainage sand stored in different silos (311). A rotary chute (36) is provided at the discharge port of the collecting hopper (35), and the discharge port of the rotary chute (36) is connected to the feeding pipe (41).

4. A ladle nozzle drainage sand filling system according to claim 3, characterized in that: The speed reducer (42) is selected to have a large speed ratio, the motor (43) is equipped with a built-in brake, and the encoder (44), the motor (43), the ladle car (12), and the distance measuring device (13) are all controlled by a PLC.

5. A method for using the ladle nozzle drainage sand filling system according to claim 4, characterized in that: The following steps are involved: S1: Material preparation: a certain amount of different types of drainage sand is placed in multiple silos (311), the gas valve is opened, and the gas is burned at the ignition and nozzle device (312) through the fuel gas medium pipeline (315). The high calorific value of the gas combustion is used to bake the drainage sand stored in the silos (311), and the smoke recovery device (313) recovers the baked smoke; S2: Automatic movement and positioning of the ladle: After the ladle car (12) is placed on the track (14), and the ladle (11) is placed on the ladle saddle of the ladle car (12), the automatic positioning system of the ladle car (12) is turned on, and the ladle car (12) automatically moves, and its real-time position is recorded and fed back through the distance measuring device (13) installed on the columns at both ends of the plant; when the distance measuring device (13) detects that the ladle car (12) moves to the preset position, the ladle car (12) automatically stops to ensure that the center of the feeding pipe (41) coincides with the center of the ladle water inlet (2), and the monitoring result signal is fed back to the silo system (3) through the distance measuring device (13); S3: Selection of drainage sand type and quantity: When the silo system (3) receives the positioning stop signal of the ladle car (12) fed back by the distance measuring device (13), it automatically selects and starts the vibrating feeder (32) corresponding to the heating silo (31) in the silo system (3) to vibrate and discharge the material according to the process requirements of the smelting steel type on the type and amount of drainage sand, and weighs the discharged drainage sand through the weighing device (33); when the weight of the drainage sand reaches the preset weight, the weighing device (33) feeds back the weighing result to the vibrating feeder (32), and the vibrating feeder (32) automatically stops vibrating and discharges the material, and feeds back the stop vibration signal to the sand adding system (4); S4: The feeding pipe is lowered from the waiting position to the working position: when the sand feeding system (4) receives the vibration stop signal of the vibrating feeder (32), the motor (43) is automatically turned on, the motor (43) is running, the reducer (42) outputs at a low speed, drives the crank (45) to rotate, and then drives the connecting rod (46) to move up and down, and drives the feeding pipe (41) to make a vertical downward movement from the waiting position through the locking rod (47). When the encoder (44) detects the set number of revolutions, the motor (43) stops rotating and brakes, and the lower end of the feeding pipe (41) stays at a preset position just above the ladle water inlet (2); S5: Sand adding operation: When the feeding pipe (41) stays at the set working position, the motor (43) stops and sends a signal to the rotating chute (36) in the silo system (3). The rotating chute (36) automatically rotates from the waiting position to the working position, so that the lower end of the rotating chute (36) is placed just above the funnel at the upper end of the feeding pipe (41). When the rotating chute (36) rotates to the working position, the stop signal is fed back to the flap valve (34) in the silo system (3), and the flap valve (34) is opened to place the weighed quantitative drainage sand in the collecting hopper (35). The sand adding operation of the ladle nozzle (2) is realized through the rotating chute (36) and the feeding pipe (41); S6: The feeding pipe rises from the working position to the waiting position: When the sand adding operation is completed, the rotating chute (36) automatically rotates from the working position to the waiting position, the motor (43) reverses, and the reducer (42) outputs at a low speed, driving the crank (45) to rotate, thereby driving the connecting rod (46) to move up and down, and driving the feeding pipe (41) to move vertically upward from the working position through the locking rod (47). When the encoder (44) detects the set number of revolutions, the motor (43) stops rotating and brakes to ensure that the feeding pipe (41) stays in the working position; S7: Ladle receives molten steel: When the feeding pipe (41) stops at the working position, the ladle car (12) automatically moves, and the real-time position of the ladle car (12) is monitored by the distance measuring device (13). When the ladle car (12) moves to the preset position under the converter furnace, the ladle car (12) automatically stops at the ladle receiving molten steel position, thereby creating conditions for the converter to tap steel.

Images