Oxygen blowing and slag removing device for iron adding chute of electric furnace

Abstract

The utility model discloses an oxygen blowing and slag removing device for an iron adding chute of an electric furnace. The device is characterized in that an oxygen supply header pipe is connected with an oxygen blowing branch pipe; the oxygen supply electromagnetic valve is arranged on the inner pipe; one end of the air cylinder is hinged to the oxygen blowing branch pipe, the other end of the air cylinder is hinged to the pointing outer pipe, the pointing outer pipe is driven to rotate around the hinged position of the pointing outer pipe and the oxygen blowing branch pipe, and the spray head always points to the interior of the chute; the air cylinder is powered by an air supply system, and an air cylinder controller is arranged on the air supply system. The other end of the spiral hose is communicated with the inner pipe through the hinged part of the pointing outer pipe and the oxygen blowing branch pipe; the thermal imaging sensor is arranged above the chute, and the interior of the chute is arranged in the monitoring range of the thermal imaging sensor; and the PLC is connected with the thermal imaging sensor, the oxygen supply electromagnetic valve and the air cylinder controller. According to the utility model, the distribution condition of slag in the chute can be monitored in real time, and the oxygen blowing angle and the oxygen blowing amount can be adjusted in time.

Description

Technical Field

[0001] The utility model relates to the field of metallurgical equipment, and particularly relates to an oxygen-blowing slag cleaning device for an iron charging chute of an electric furnace. Background Art

[0002] The electric furnace is one of the indispensable smelting equipments in steelmaking production. The technology of charging hot metal into the electric furnace is an important link in the process of electric furnace steelmaking. The iron charging chute is an important channel connecting the electric furnace and the hot metal ladle. However, during the process of charging hot metal, due to the frictional force of the refractory in the iron chute and the splashing caused by the hot metal falling from a high place, the hot metal and slag will adhere and accumulate in the chute to form molten slag. These molten slags not only affect the flow of hot metal, but also cause wear of the chute, increasing the workload of cleaning and maintenance. Therefore, after each hot metal charging, it is necessary to manually clean and maintain the inside of the chute.

[0003] At present, the cleaning of the molten slag in the iron charging chute mainly relies on manual labor, with a harsh working environment, high labor intensity and low efficiency, which does not meet the requirements of modern industrial development.

[0004] In the existing technical solutions, such as a slag cleaning device for an iron charging chute of an electric furnace with the authorization announcement number of CN 221440789 U, an oxygen main pipe is installed outside the chute body, an oxygen branch pipe is installed on the oxygen main pipe, and the oxygen blowing end of the oxygen branch pipe faces the inside of the chute body to blow oxygen to clean the slag. However, this slag cleaning device cannot adjust the oxygen blowing operation according to the distribution of the molten slag, resulting in waste of some oxygen, high slag cleaning cost and low working efficiency. Summary of the Invention

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and propose an oxygen-blowing slag cleaning device for an iron charging chute of an electric furnace, which can monitor the distribution of the molten slag in the chute in real time, timely adjust the oxygen blowing angle and the oxygen blowing amount, reduce the cost while improving the working efficiency, and optimize the cleaning effect.

[0006] To achieve the above purpose, the utility model proposes the following technical solutions:

[0007] An oxygen-blowing slag cleaning device for an iron charging chute of an electric furnace includes a chute body, an oxygen blowing device, a molten slag monitoring device and a PLC controller.

[0008] An iron water inlet is arranged at the upturned end of the chute body, and the downturned end of the chute body is the chute. A base is arranged at the bottom of the chute body.

[0009] The oxygen blowing device includes an oxygen blowing branch pipe, an oxygen supply main pipe, an oxygen supply solenoid valve, a pointing outer pipe, a cylinder, and a spiral hose. The oxygen blowing branch pipe is installed above the chute. An inner pipe is laid in the oxygen blowing branch pipe, and the position of the inner pipe in the oxygen blowing branch pipe is fixed. The oxygen supply main pipe is arranged outside the chute body. The oxygen supply main pipe is connected to a plurality of oxygen blowing branch pipes and is communicated with the inner pipes of the oxygen blowing branch pipes. Oxygen flows in the inner pipes.

[0010] The oxygen supply solenoid valve is arranged on the inner pipe to control the flow rate of oxygen in the inner pipe. The oxygen blowing branch pipe is hinged to the pointing outer pipe. A nozzle is provided at the end of the pointing outer pipe, and the nozzle points to the inside of the chute. One end of the cylinder is hinged to the lower side of the oxygen blowing branch pipe, and the other end of the cylinder is hinged to the lower side of the pointing outer pipe. The cylinder drives the pointing outer pipe to rotate around the hinge with the oxygen blowing branch pipe. During the rotation of the pointing outer pipe, the nozzle always points to the inside of the chute. The cylinder is powered by a gas supply system, and the gas supply system controls the operation of each cylinder.

[0011] One end of the spiral hose is connected and communicated with the nozzle. The other end of the spiral hose passes through the hinge of the pointing outer pipe and the oxygen blowing branch pipe and is connected and communicated with the inner pipe of the oxygen blowing branch pipe. The connection position of the spiral hose and the inner pipe of the oxygen blowing branch pipe is inside the oxygen blowing branch pipe, that is, the connection position of the spiral hose and the inner pipe is at a certain distance from the end of the oxygen blowing branch pipe. During the rotation of the pointing outer pipe around the oxygen blowing branch pipe, the pointing angle of the nozzle changes, and the spiral hose also rotates accordingly. The oxygen supply main pipe supplies oxygen to the inner pipe of the oxygen blowing branch pipe and blows oxygen into the chute through the spiral hose and the nozzle.

[0012] The slag monitoring device includes a thermal imaging sensor and a support frame. The thermal imaging sensor is arranged above the chute through the support frame, and the inside of the chute is within the monitoring range of the thermal imaging sensor.

[0013] The input end of the PLC controller is connected to the thermal imaging sensor, and the output end of the PLC controller is connected to the thermal imaging sensor, the oxygen supply solenoid valve, and the gas supply system.

[0014] The PLC controller controls the opening and closing of the thermal imaging sensor. When pouring hot metal into the chute, the thermal imaging sensor is in the closed state. After the hot metal pouring is completed, the thermal imaging sensor is in the open state.

[0015] The connection method and usage method of the above-mentioned PLC controller with the thermal imaging sensor, the oxygen supply solenoid valve, and the gas supply system belong to the existing content in the prior art, and those skilled in the art are capable of implementing them.

[0016] Preferably, the oxygen supply main pipe is arranged outside the chute through a main pipe support, and the center line of the oxygen supply main pipe is consistent with the length direction of the chute.

[0017] Preferably, the oxygen-blowing branch pipe is a bent pipe with a bending angle of 80° to 125°. The oxygen-blowing branch pipe includes an inclined section and a horizontal section. One end of the inclined section is connected to the oxygen supply main pipe, and the other end of the inclined section is connected to the horizontal section; the pointing outer pipe is hinged to the horizontal section of the oxygen-blowing branch pipe.

[0018] Preferably, the oxygen-blowing device further includes hinge connecting plates. There are two hinge connecting plates, which are respectively arranged on the front and back sides of the oxygen-blowing branch pipe. One end of the hinge connecting plate is hinged to the oxygen-blowing branch pipe, and the other end of the hinge connecting plate is hinged to the pointing outer pipe, realizing the hinge connection between the oxygen-blowing branch pipe and the pointing outer pipe.

[0019] Preferably, the oxygen-blowing branch pipe is arranged above the chute through a branch pipe support. The branch pipe support is arranged on the outer edge of the chute, and the branch pipe support is perpendicular to the outer edge of the chute. The branch pipe support provides a supporting force for the oxygen-blowing branch pipe, making the position of the oxygen-blowing branch pipe stable.

[0020] Preferably, the rotation range of the pointing outer pipe is 60° to 120°.

[0021] Preferably, the hinge position between the oxygen-blowing branch pipe and the pointing outer pipe is located on the symmetry plane of the chute body.

[0022] Preferably, the plane where the oxygen-blowing branch pipe is located is parallel to the width direction of the chute.

[0023] Preferably, the angle between the plane where the oxygen-blowing branch pipe is located and the width direction of the chute is 20° to 40°, and it is inclined towards the downward sliding direction of the chute.

[0024] Preferably, the nozzle is an outward-expanding nozzle.

[0025] Preferably, the cylinder block of the cylinder is hinged to the lower side of the oxygen-blowing branch pipe, and the cylinder rod of the cylinder is hinged to the lower side of the pointing outer pipe.

[0026] Preferably, there are multiple thermal imaging sensors, which are arranged at intervals to monitor the inside of the chute in a divided area.

[0027] Preferably, the support frame includes a support sub-frame and a support main-frame. The support main-frame is arranged on the symmetry plane of the chute and is parallel to the length direction of the chute; the support main-frame is connected to the outer wall of the chute body through multiple support sub-frames; the thermal imaging sensors are arranged at intervals on the support main-frame, and the inside of the chute is within the sensing range of the thermal imaging sensors. Each thermal imaging sensor is responsible for monitoring the distribution of molten slag in a part of the area inside the chute.

[0028] Specifically, during the process of pouring hot metal, the thermal imaging sensors are in the closed state; after the pouring of hot metal is completed, the PLC controller sends an opening instruction to the thermal imaging sensors, and starts to monitor the distribution of molten slag in the chute.

[0029] When the thermal imaging sensor detects the specific distribution position of the slag, it will send a signal to the PLC controller. The PLC controller calculates the pointing angle of the nozzle according to the specific distribution of the slag, and then sends a command to the gas supply system to control the extension or shortening of the cylinder to adjust the pointing angle of the nozzle, and then opens the oxygen supply solenoid valve to supply oxygen and blow oxygen to clean the slag. During the cleaning process, the thermal imaging sensor performs real-time monitoring and can judge the cleaning effect according to the changes in the distribution of the slag. If the slag distribution has not changed, a signal is sent to the PLC controller, and the PLC controller sends a command to the oxygen supply solenoid valve to increase the oxygen supply, thereby improving the cleaning efficiency, or sends a command to the gas supply system to adjust the pointing angle of the nozzle to optimize the cleaning effect. If the slag gradually decreases, the cleaning effect is obvious, and then the cleaning will continue according to the established pointing angle and oxygen supply.

[0030] The beneficial effects of the utility model are:

[0031] The utility model provides an oxygen blowing device and a slag monitoring device on the chute body. The slag monitoring device detects the distribution of slag in the chute in real time and transmits a signal to a PLC controller. The PLC controller sends instructions to the oxygen supply solenoid valve and the gas supply system in the oxygen blowing device according to the signal to adjust the oxygen supply amount and the oxygen blowing angle, thereby realizing real-time adjustment of the oxygen blowing angle and the oxygen blowing amount, reducing costs while improving work efficiency and optimizing the cleaning effect.

[0032] The utility model realizes regional monitoring of slag in the chute by setting up a slag monitoring device including multiple thermal imaging sensors, and specifically adjusts the oxygen blowing angle and oxygen blowing amount corresponding to each area according to the slag distribution in the area, thereby further improving the cleaning efficiency and reducing the cost.

[0033] By adopting the above scheme, the utility model can monitor the distribution of slag in the chute in real time, adjust the oxygen blowing angle and oxygen blowing amount in time, reduce costs, improve work efficiency, and optimize the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0035] Figure 1 It is a front view structural schematic diagram of the utility model.

[0036] Figure 2 It is a top view structural schematic diagram of the utility model.

[0037] Figure 3 It is a schematic structural diagram of the oxygen blowing device in the present utility model.

[0038] Figure 4 It is a control circuit diagram of the PLC controller in the present utility model.

[0039] Figure 5 It is a schematic structural diagram of the connection between the oxygen blowing branch pipe and the pointing outer pipe in the third embodiment.

[0040] In the figure, 1 - launder body, 2 - oxygen blowing device, 3 - thermal imaging sensor, 4 - PLC controller, 11 - base, 12 - hot metal inlet, 13 - launder, 21 - oxygen supply main pipe, 22 - oxygen blowing branch pipe, 23 - oxygen supply solenoid valve, 24 - spiral hose, 25 - cylinder, 26 - pointing outer pipe, 27 - hinged connecting plate, 211 - main pipe support, 221 - branch pipe support, 222 - inner pipe, 251 - gas supply system, 261 - nozzle; 31 - main support frame, 32 - auxiliary support frame. Embodiment

[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0042] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0043] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0045] First Embodiment:

[0046] As Figures 1 to 3 shown, an oxygen - blowing slag - cleaning device for the hot - metal charging chute of an electric furnace includes a chute body 1, an oxygen - blowing device 2, a slag monitoring device, and a PLC controller 4.

[0047] One end of the chute body 1 with an upward slope is provided with a hot - metal inlet 12, and the downward - sloping end of the chute body 1 is the chute 13. A base 11 is provided at the bottom of the chute body 1.

[0048] The oxygen - blowing device 2 includes an oxygen - blowing branch pipe 22, an oxygen - supply main pipe 21, an oxygen - supply solenoid valve 23, a pointing outer pipe 26, a cylinder 25, and a spiral hose 24. The oxygen - blowing branch pipe 22 is erected above the chute 13. An inner pipe 222 is laid in the oxygen - blowing branch pipe 22, and the position of the inner pipe 222 in the oxygen - blowing branch pipe 22 is fixed. The oxygen - supply main pipe 21 is arranged outside the chute body 1. The oxygen - supply main pipe 21 is connected to a plurality of oxygen - blowing branch pipes 22, and the oxygen - supply main pipe 21 is communicated with the inner pipes of the oxygen - blowing branch pipes 22, and oxygen flows in the inner pipe 222.

[0049] The oxygen - supply solenoid valve 23 is arranged on the inner pipe 222 to control the flow rate of oxygen in the inner pipe 222. The oxygen - blowing branch pipe 22 is hinged to the pointing outer pipe 26. A spray head 261 is provided at the end of the pointing outer pipe 26, and the spray head 261 points to the inside of the chute 13. One end of the cylinder 25 is hinged to the lower side of the oxygen - blowing branch pipe 22, and the other end of the cylinder 25 is hinged to the lower side of the pointing outer pipe 26. The cylinder 25 drives the pointing outer pipe 26 to rotate around the hinge point with the oxygen - blowing branch pipe 22. During the rotation of the pointing outer pipe 26, the spray head 261 always points to the inside of the chute 13. The cylinder 25 is powered by a gas - supply system 251, and the gas - supply system 251 controls the operation of each cylinder.

[0050] One end of the spiral hose 24 is connected and communicated with the spray head 261. The other end of the spiral hose 24 passes through the hinge point of the pointing outer pipe 26 and the oxygen - blowing branch pipe 22 and is connected and communicated with the inner pipe 222 of the oxygen - blowing branch pipe 22. The connection position of the spiral hose 24 and the inner pipe 222 of the oxygen - blowing branch pipe 22 is inside the oxygen - blowing branch pipe 22, that is, the connection position of the spiral hose 24 and the inner pipe 222 is at a certain distance from the end of the oxygen - blowing branch pipe 22. During the rotation of the pointing outer pipe 26 around the oxygen - blowing branch pipe 22, the pointing angle of the spray head 261 changes, and the spiral hose 24 also rotates accordingly. The oxygen - supply main pipe 21 supplies oxygen to the inner pipe of the oxygen - blowing branch pipe 22, and blows oxygen into the chute 13 through the spiral hose 24 and the spray head 261.

[0051] The slag monitoring device includes a thermal imaging sensor 3 and a support frame. The thermal imaging sensor 3 is arranged above the chute 13 through the support frame, and the inside of the chute 13 is within the monitoring range of the thermal imaging sensor 3.

[0052] As Figure 4 shown, the input end of the PLC controller 4 is connected to the thermal imaging sensor 3, and the output end of the PLC controller 4 is connected to the thermal imaging sensor 3, the oxygen supply solenoid valve 23, and the gas supply system 251.

[0053] The PLC controller 4 controls the opening and closing of the thermal imaging sensor 3. When pouring molten iron into the chute 13, the thermal imaging sensor 3 is in the closed state. After the molten iron pouring is completed, the thermal imaging sensor 3 is in the open state.

[0054] Second Embodiment:

[0055] As Figures 1 to 3 shown, an oxygen blowing slag cleaning device for an electric furnace molten iron pouring chute includes a chute body 1, an oxygen blowing device 2, a slag monitoring device, and a PLC controller 4.

[0056] One end of the chute body 1 with an upward slope is provided with a molten iron inlet 12, and the downward-sloping end of the chute body 1 is the chute 13. A base 11 is provided at the bottom of the chute body 1.

[0057] The oxygen blowing device 2 includes an oxygen blowing branch pipe 22, an oxygen supply main pipe 21, an oxygen supply solenoid valve 23, a pointing outer pipe 26, a cylinder 25, and a spiral hose 24. The oxygen blowing branch pipe 22 is erected above the chute 13. An inner pipe 222 is laid in the oxygen blowing branch pipe 22, and the position of the inner pipe 222 in the oxygen blowing branch pipe 22 is fixed. The oxygen supply main pipe 21 is arranged outside the chute body 1, and the oxygen supply main pipe 21 is connected to a plurality of oxygen blowing branch pipes 22, and the oxygen supply main pipe 21 communicates with the inner pipes of the oxygen blowing branch pipes 22, and oxygen flows in the inner pipe 222.

[0058] The oxygen supply solenoid valve 23 is arranged on the inner pipe 222 to control the flow rate of oxygen in the inner pipe 222. The oxygen blowing branch pipe 22 is hinged to the pointing outer pipe 26. A nozzle 261 is provided at the end of the pointing outer pipe 26, and the nozzle 261 points to the inside of the chute 13. One end of the cylinder 25 is hinged to the lower side of the oxygen blowing branch pipe 22, and the other end of the cylinder 25 is hinged to the lower side of the pointing outer pipe 26. The cylinder 25 drives the pointing outer pipe 26 to rotate around the hinge point with the oxygen blowing branch pipe 22. During the rotation of the pointing outer pipe 26, the nozzle 261 always points to the inside of the chute 13. The cylinder 25 is powered by the gas supply system 251, and the gas supply system 251 controls the operation of each cylinder.

[0059] One end of the spiral hose 24 is connected and communicated with the spray head 261. The other end of the spiral hose 24 passes through the joint of the outer tube 26 pointing to the oxygen blowing branch pipe 22 and is connected and communicated with the inner tube 222 of the oxygen blowing branch pipe 22. The connection position of the spiral hose 24 and the inner tube 222 of the oxygen blowing branch pipe 22 is inside the oxygen blowing branch pipe 22, that is, the connection position of the spiral hose 24 and the inner tube 222 is at a certain distance from the end of the oxygen blowing branch pipe 22. During the rotation of the outer tube 26 pointing to the oxygen blowing branch pipe 22, the pointing angle of the spray head 261 changes, and the spiral hose 24 also rotates accordingly. The oxygen supply main pipe 21 supplies oxygen to the inner tube of the oxygen blowing branch pipe 22, and blows oxygen into the chute 13 through the spiral hose 24 and the spray head 261.

[0060] The slag monitoring device includes a thermal imaging sensor 3 and a support frame. The thermal imaging sensor 3 is arranged above the chute 13 through the support frame, and the inside of the chute 13 is within the monitoring range of the thermal imaging sensor 3.

[0061] As Figure 4 shown, the input end of the PLC controller 4 is connected to the thermal imaging sensor 3, and the output end of the PLC controller 4 is connected to the thermal imaging sensor 3, the oxygen supply solenoid valve 23, and the gas supply system 251.

[0062] The PLC controller 4 controls the opening and closing of the thermal imaging sensor 3. When pouring molten iron into the chute 13, the thermal imaging sensor 3 is in the closed state. After pouring molten iron is completed, the thermal imaging sensor 3 is in the open state.

[0063] A plurality of thermal imaging sensors 3 are provided at intervals to monitor the inside of the chute 13 in a divided area. The support frame includes a support sub-frame 32 and a support main-frame 31. The support main-frame 31 is arranged on the symmetry plane of the chute 13 and is parallel to the length direction of the chute 13. The support main-frame 31 is connected to the outer wall of the chute body 1 through a plurality of support sub-frames 32. The thermal imaging sensors 3 are arranged at intervals on the support main-frame 31, and each thermal imaging sensor 3 is responsible for monitoring the distribution of slag in a part of the area inside the chute 13.

[0064] Each thermal imaging sensor 3 monitors the inside of the chute 13 in a divided area, and transmits the distribution of slag in each area of the chute 13 to the PLC controller 4. The PLC controller 4 sends instructions to the oxygen supply solenoid valve 23 and the gas supply system 251 according to the distribution of slag. The distribution of slag determines the opening and closing of the oxygen supply solenoid valve 23 and the control of the gas supply system 251 for the cylinder 25.

[0065] It is assumed that the chute 13 is divided into five areas a, b, c, d, and e, and there are five thermal imaging sensors 3 in total. The first thermal imaging sensor is responsible for area a, the second thermal imaging sensor is responsible for area b, the third thermal imaging sensor is responsible for area c, the fourth thermal imaging sensor is responsible for area d, and the fifth thermal imaging sensor is responsible for area e.

[0066] There are five oxygen blowing branches 22, namely the first oxygen blowing branch, the second oxygen blowing branch, the third oxygen blowing branch, the fourth oxygen blowing branch, and the fifth oxygen blowing branch, corresponding to the five areas a, b, c, d, and e respectively.

[0067] The oxygen supply solenoid valve 23 on the first oxygen blowing branch is the first oxygen supply solenoid valve, the cylinder on the first oxygen blowing branch is the first cylinder, the oxygen supply solenoid valve 23 on the second oxygen blowing branch is the second oxygen supply solenoid valve, the cylinder on the second oxygen blowing branch is the second cylinder, the oxygen supply solenoid valve 23 on the third oxygen blowing branch is the third oxygen supply solenoid valve, the cylinder on the third oxygen blowing branch is the third cylinder, the oxygen supply solenoid valve 23 on the fourth oxygen blowing branch is the fourth oxygen supply solenoid valve, the cylinder on the fourth oxygen blowing branch is the fourth cylinder, the oxygen supply solenoid valve 23 on the fifth oxygen blowing branch is the fifth oxygen supply solenoid valve, and the cylinder on the fifth oxygen blowing branch is the fifth cylinder.

[0068] During the process of pouring hot metal, the first thermal imaging sensor, the second thermal imaging sensor, the third thermal imaging sensor, the fourth thermal imaging sensor, and the fifth thermal imaging sensor are in the closed state; after the hot metal pouring is completed, the PLC controller 4 sends an opening instruction to the first thermal imaging sensor, the second thermal imaging sensor, the third thermal imaging sensor, the fourth thermal imaging sensor, and the fifth thermal imaging sensor, and starts to monitor the distribution of the slag in the chute 13.

[0069] If it is assumed that the first thermal imaging sensor monitors that there is local slag in area a and monitors the specific distribution position of the slag, it will send a signal to the PLC controller 4. The PLC controller 4 calculates the pointing angle of the nozzle 261 according to the specific distribution of the slag, then sends an instruction to the gas supply system 251 to control the first cylinder to extend or shorten, adjust the pointing angle of the nozzle 261, and then open the first oxygen supply solenoid valve to supply oxygen to blow and clean the slag in area a. During the cleaning process, the first thermal imaging sensor conducts real-time monitoring and can judge the cleaning effect according to the change in the distribution of the slag. If the distribution of the slag does not change, it sends a signal to the PLC controller 4, and the PLC controller 4 sends an instruction to the first oxygen supply solenoid valve to increase the oxygen supply amount, thereby improving the cleaning efficiency, or sends an instruction to the gas supply system 251 to adjust the pointing angle of the nozzle 261 to optimize the cleaning effect; if the slag gradually decreases and the cleaning effect is obvious, continue the cleaning according to the established pointing angle and oxygen supply amount.

[0070] Assume that the first thermal imaging sensor monitors that there is slag throughout area a, then the PLC controller 4 sends an instruction to the gas supply system 251 to sequentially adjust the pointing angle of the nozzle 261, and clean the slag in area a from left to right or from front to back in sequence until the cleaning is completed.

[0071] Third Embodiment:

[0072] As Figures 1 to 3 shown, an oxygen blowing slag cleaning device for an iron charging launder of an electric furnace includes a launder body 1, an oxygen blowing device 2, a slag monitoring device, and a PLC controller 4.

[0073] The iron water inlet 12 is arranged at the upturned end of the launder body 1, and the downturned end of the launder body 1 is the launder 13. A base 11 is provided at the bottom of the launder body 1.

[0074] The oxygen blowing device 2 includes an oxygen blowing branch pipe 22, an oxygen supply main pipe 21, an oxygen supply solenoid valve 23, a pointing outer pipe 26, a cylinder 25, and a spiral hose 24. The oxygen blowing branch pipe 22 is arranged above the launder 13. An inner pipe 222 is laid in the oxygen blowing branch pipe 22, and the position of the inner pipe 222 in the oxygen blowing branch pipe 22 is fixed. The oxygen supply main pipe 21 is arranged outside the launder body 1, and the oxygen supply main pipe 21 is connected to a plurality of oxygen blowing branch pipes 22, and the oxygen supply main pipe 21 is communicated with the inner pipes of the oxygen blowing branch pipes 22, and oxygen flows in the inner pipe 222.

[0075] The oxygen supply solenoid valve 23 is arranged on the inner pipe 222 to control the flow rate of oxygen in the inner pipe 222. The oxygen blowing branch pipe 22 is hinged to the pointing outer pipe 26. A nozzle 261 is provided at the end of the pointing outer pipe 26, and the nozzle 261 points to the inside of the launder 13. One end of the cylinder 25 is hinged to the lower side of the oxygen blowing branch pipe 22, and the other end of the cylinder 25 is hinged to the lower side of the pointing outer pipe 26. The cylinder 25 drives the pointing outer pipe 26 to rotate around the hinged position with the oxygen blowing branch pipe 22. During the rotation of the pointing outer pipe 26, the nozzle 261 always points to the inside of the launder 13. The cylinder 25 is powered by a gas supply system 251, and the gas supply system 251 controls the operation of each cylinder.

[0076] As Figure 5 shown, the oxygen blowing device 2 further includes two hinged connecting plates 27, which are respectively arranged on the front and rear sides of the oxygen blowing branch pipe 22. One end of the hinged connecting plate 27 is hinged to the oxygen blowing branch pipe 22, and the other end of the hinged connecting plate 27 is hinged to the pointing outer pipe 26, thereby realizing the hinge connection between the oxygen blowing branch pipe 22 and the pointing outer pipe 26.

[0077] One end of the spiral hose 24 is connected and communicated with the spray head 261. The other end of the spiral hose 24 passes through the articulated joint of the pointing outer tube 26 and the oxygen blowing branch pipe 22 and is connected and communicated with the inner tube 222 of the oxygen blowing branch pipe 22. The connection position of the spiral hose 24 and the inner tube 222 of the oxygen blowing branch pipe 22 is inside the oxygen blowing branch pipe 22, that is, the connection position of the spiral hose 24 and the inner tube 222 is at a certain distance from the end of the oxygen blowing branch pipe 22. During the rotation of the pointing outer tube 26 around the oxygen blowing branch pipe 22, the pointing angle of the spray head 261 changes, and the spiral hose 24 also rotates accordingly. The oxygen supply main pipe 21 supplies oxygen to the inner tube of the oxygen blowing branch pipe 22, and blows oxygen into the chute 13 through the spiral hose 24 and the spray head 261.

[0078] The slag monitoring device includes a thermal imaging sensor 3 and a support frame. The thermal imaging sensor 3 is arranged above the chute 13 through the support frame, and the inside of the chute 13 is within the monitoring range of the thermal imaging sensor 3.

[0079] As Figure 4 shown, the input end of the PLC controller 4 is connected to the thermal imaging sensor 3, and the output end of the PLC controller 4 is connected to the thermal imaging sensor 3, the oxygen supply solenoid valve 23, and the gas supply system 251.

[0080] The PLC controller 4 controls the opening and closing of the thermal imaging sensor 3. When pouring molten iron into the chute 13, the thermal imaging sensor 3 is in the closed state. After the pouring of molten iron is completed, the thermal imaging sensor 3 is in the open state.

[0081] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oxygen-blowing slag cleaning device for the hot metal charging chute of an electric furnace, comprising a chute body. An iron water inlet is arranged at one end of the chute body that tilts upward, and the other end of the chute body that slopes downward is the chute; it is characterized in that: It also includes an oxygen blowing device, a slag monitoring device, and a PLC controller. The oxygen blowing device includes oxygen blowing branch pipes, an oxygen supply main pipe, an oxygen supply solenoid valve, a pointing outer pipe, a cylinder, and a spiral hose. An inner pipe is laid inside the oxygen blowing branch pipes, and the oxygen blowing branch pipes are installed above the chute. The oxygen supply main pipe is connected to multiple oxygen blowing branch pipes and is communicated with the inner pipes. The oxygen supply solenoid valve is arranged on the inner pipes. The oxygen blowing branch pipes are hinged to the pointing outer pipes. A nozzle is provided at the end of the pointing outer pipes. One end of the cylinder is hinged to the lower side of the oxygen blowing branch pipes, and the other end of the cylinder is hinged to the lower side of the pointing outer pipes. The cylinder drives the pointing outer pipes to rotate around the hinge point with the oxygen blowing branch pipes. During the rotation process, the nozzle always points to the inside of the chute. The cylinder is powered by a gas supply system, and the gas supply system controls the operation of the cylinder. One end of the spiral hose is communicated with the nozzle, and the other end of the spiral hose passes through the hinge point of the pointing outer pipes and the oxygen blowing branch pipes and is communicated with the inner pipes. The slag monitoring device includes a thermal imaging sensor and a support frame. The thermal imaging sensor is installed above the chute through the support frame, and the inside of the chute is within the monitoring range of the thermal imaging sensor. The input end of the PLC controller is connected to the thermal imaging sensor, and the output end of the PLC controller is connected to the thermal imaging sensor, the oxygen supply solenoid valve, and the cylinder controller.

2. The oxygen-blowing slag cleaning device for the hot metal charging chute of an electric furnace according to claim 1, characterized in that: The oxygen supply main pipe is installed outside the chute through a main pipe support frame, and the center line of the oxygen supply main pipe is consistent with the length direction of the chute.

3. The oxygen-blowing slag cleaning device for the hot metal charging chute of an electric furnace according to claim 1, characterized in that: The oxygen blowing branch pipes are bent pipes with a bending angle of 80-125°. The oxygen blowing branch pipes include an inclined section and a horizontal section. One end of the inclined section is connected to the oxygen supply main pipe, and the other end of the inclined section is connected to the horizontal section. The pointing outer pipes are hinged to the horizontal sections of the oxygen blowing branch pipes. The rotation range of the pointing outer pipes is 60-120°.

4. The oxygen-blowing slag cleaning device for the hot metal runner of an electric furnace according to claim 1, wherein: The oxygen blowing device also includes hinge connecting plates. There are two hinge connecting plates, which are respectively arranged on the front and rear sides of the oxygen blowing branch pipes. One end of the hinge connecting plates is hinged to the oxygen blowing branch pipes, and the other end of the hinge connecting plates is hinged to the pointing outer pipes to realize the hinge connection between the oxygen blowing branch pipes and the pointing outer pipes.

5. The oxygen-blowing slag cleaning device for the hot metal charging chute of an electric furnace according to claim 1, characterized in that: The hinge point between the oxygen blowing branch pipes and the pointing outer pipes is located on the symmetry plane of the chute body.

6. The oxygen blowing slag cleaning device for the hot metal charging chute of an electric furnace according to claim 1, wherein: The plane where the oxygen blowing branch pipes are located is parallel to the width direction of the chute.

7. The oxygen-blowing slag cleaning device for the hot metal charging chute of an electric furnace according to claim 1, characterized in that: The plane where the oxygen blowing branch pipes are located forms an angle of 20-40° with the width direction of the chute and is inclined towards the downward sliding direction of the chute.

8. The oxygen-blowing slag cleaning device for the hot metal runner of an electric furnace according to claim 1, wherein: The nozzle is an outward-expanded nozzle.

9. The oxygen-blowing slag cleaning device for the hot metal charging chute of an electric furnace according to claim 1, characterized in that: The cylinder body of the cylinder is hinged to the lower side of the oxygen blowing branch pipes, and the cylinder rod of the cylinder is hinged to the lower side of the pointing outer pipes.

10. The oxygen-blowing slag cleaning device for the hot metal runner of an electric furnace according to claim 1, characterized in that: There are multiple thermal imaging sensors, which are arranged at intervals to perform regional monitoring on the inside of the chute. The support frame includes a support sub-frame and a support main frame. The support main frame is installed on the symmetry plane of the chute and is parallel to the length direction of the chute. The support main frame is connected to the outer wall of the chute body through multiple support sub-frames. The thermal imaging sensors are arranged at intervals on the support main frame.

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