A feeding system for producing ferroalloys in a DC ore-fired furnace

Abstract

The present invention discloses a feeding system for producing ferroalloys in a DC ore-fired furnace, and relates to the technical field of equipment for producing ferroalloys in a DC ore-fired furnace. The system includes several sets of feeding devices. A central feeding device is connected to the furnace cover at the center of the electrode, and a peripheral feeding device is connected to the furnace cover at the periphery of the electrode. The feeding device includes a weighing bin, an upper feeding pipe, and a lower feeding pipe. The feeding pipe for feeding the periphery of the electrode is fixed to the top surface of the furnace cover of the DC ore-fired furnace, and the bottom end of the feeding pipe passes through the furnace cover and is placed in the DC ore-fired furnace. The feeding pipe for feeding the center of the electrode is connected to the guide barrel of the central feeding device. Advantages: The central feeding device and the corresponding supporting feeding device are used to achieve uniform distribution of material at the center position of the furnace around the four electrodes. The feeding of material around the periphery of the four electrodes uses four sets of peripheral feeding devices and the corresponding feeding devices to achieve uniform distribution of material around the periphery of the electrode, thereby achieving dispersed material drop and avoiding the phenomenon of fixed-point material piling.

Description

Technical Field

[0001] The invention relates to the technical field of equipment for producing ferroalloys using a DC ore-fired furnace, and in particular to a feeding system for producing ferroalloys using a DC ore-fired furnace. Background Art

[0002] The working principle of a DC ore-burning furnace is that the power grid provides high-voltage electricity, which is converted into low-voltage, high-current electricity through the ore-burning furnace transformer and transmitted to the electrodes. The charge is melted by resistance heat to obtain the required liquid product, which is then discharged through the taphole of the ore-burning furnace. During the smelting process, the raw materials are first mixed, and the mixed charge is transported to the quantitative silo by a conveyor belt. The charge is then fed into the furnace through the furnace top charging silo, feeding pipe and other devices. The mixed charge is melted by the heat released by the electrodes to form a slag iron solution, which is finally discharged from the taphole.

[0003] At present, the feeding device of the submerged arc furnace is usually the feed tube type. The feed tube type feeding method relies on multiple feed tubes arranged around the electrodes on the top of the submerged arc furnace to feed materials to fixed points in the furnace. However, the fixed-point feeding has the phenomenon of material piling, resulting in uneven material layer in the furnace; the uneven material layer leads to unstable furnace resistance, increased electrode resistance heat loss, poor furnace condition and other problems, which are not conducive to the process control of the submerged arc furnace; therefore, a reasonable feeding method is extremely important for ferroalloy production. Summary of the Invention

[0004] The object of the present invention is to provide a feeding system for producing ferroalloy in a DC ore-fired furnace, which can achieve uniform distribution of materials and improve furnace reliability.

[0005] The present invention is implemented by the following technical solutions: a feeding system for producing ferroalloys in a DC ore-fired furnace, comprising a first platform, a second platform, and several sets of feeding devices for feeding materials to the center of an electrode and the periphery of an electrode respectively; a central feeding device is connected to the furnace cover at the center of the electrode, and a peripheral feeding device is connected to the furnace cover at the periphery of the electrode; the feeding device comprises a weighing silo, an upper section material pipe, a lower section material pipe, and a furnace inlet material pipe; the weighing silo is installed on the first platform, and the upper section material pipe is vertically penetrated and fixed to the second platform On the platform, the bottom discharge port of the weighing silo is connected to the top of the upper material pipe, and one end of the lower material pipe is connected to the bottom end of the upper material pipe; the other end of the lower material pipe is connected to the pipe mouth of the furnace inlet pipe, and the upper material pipe is installed with an electric plug valve; the furnace inlet pipe that supplies material to the periphery of the electrode is fixed to the top surface of the furnace cover of the DC submerged arc furnace, and the bottom end of the furnace inlet pipe passes through the furnace cover and is placed in the DC submerged arc furnace; the furnace inlet pipe that supplies material to the center of the electrode is connected to the guide cylinder of the central feeding device.

[0006] Furthermore, an insulating short section is connected to the position of the lower section material pipe adjacent to the furnace cover, and the insulating short section includes a steel pipe and a first flange welded on both ends of the steel pipe. An insulating ring plate is provided on each first flange through a second flange clamp and fixed with bolts. An insulating sleeve is provided on the bolt, and insulating washers are provided at both ends of the bolt to abut the corresponding first flange and second flange. The inner wall of the steel pipe is provided with a high-temperature resistant castable layer, and an anchor hook is buried in the high-temperature resistant castable layer.

[0007] Furthermore, the lower section of the material pipe is connected and fixed to the second platform through a pull rod assembly, and the pull rod assembly includes two screws connected by a basket bolt. The two ends of the pull rod assembly are respectively connected to the second platform and the lower section of the material pipe through an insulating porcelain bottle.

[0008] Furthermore, the central feeding device includes a central feeding drive motor, a drive shaft, and a material guide cylinder; the material guide cylinder is sealed and fixed at the center of the furnace cover, the central feeding drive motor is fixed on the top surface of the material guide cylinder, and the rotating drive shaft is coaxially provided in the material guide cylinder. The top end of the drive shaft is coaxially connected to the output end of the central feeding drive motor, and the bottom end of the drive shaft is fixed with a material balancing tray placed below the barrel mouth of the material guide cylinder, and the top surface of the material balancing tray is evenly fixed with material balancing plates along the circumference.

[0009] Furthermore, the lower portion of the material guiding cylinder is a closing structure, and the diameter of the opening of the material guiding cylinder is less than or equal to the diameter of the material balancing plate.

[0010] Furthermore, the peripheral feeding device includes a feeding bin, and a driving mechanism and a transmission gear box installed on the top surface of the furnace cover; the driving mechanism is connected to the input shaft of the transmission gear box, and the output shaft of the transmission gear box passes through the furnace cover and is fixedly connected to the top surface of the feeding bin; the feeding bin swings back and forth in a fan-shaped trajectory, and the top of the feeding bin is provided with a feeding port that is movably placed below the pipe mouth of the furnace feeding pipe; the bottom of the feeding bin is provided with a discharge port, and an opening and closing valve plate is swingably provided at the discharge port, and a material equalization structure is provided in the feeding bin.

[0011] Furthermore, the bottom surface of the furnace cover above each feeding bin is fixedly connected to an arc-shaped hanging rail, and the top surface of the feeding bin is fixed to a connecting piece that slides along the hanging rail.

[0012] Furthermore, the material distribution structure includes two grate plates fixed to the inner wall of the feeding bin, one end of the two grate plates are butt-jointed and fixed to the feeding port of the feeding bin, and the grate plates are arranged to be tilted downward from the feeding port of the feeding bin; a number of material dividing partitions are fixed at intervals from the bottom of each grate plate to the feeding port of the feeding bin.

[0013] Furthermore, the driving mechanism includes a cam, a connecting rod, a connecting handle and a peripheral feeding drive motor; the cam is sleeved and fixed on the output end of the peripheral feeding drive motor, the edge of the cam is swingably connected to one end of the connecting rod through a connecting column, and the other end of the connecting rod is swingably connected to one end of the connecting handle; the transmission gear box includes a box body, the horizontally arranged input shaft, the vertically arranged transition shaft and the output shaft, the transition shaft and the output shaft are sleeved and fixed with spur gears that mesh with each other for transmission, and the input shaft and the transition shaft are sleeved and fixed with bevel gears that mesh with each other for transmission; the other end of the connecting handle is sleeved and fixed on one end of the input shaft.

[0014] Furthermore, it also includes a cooling device, which includes a liquid inlet cavity and a rotary joint; a liquid inlet channel and a liquid discharge channel are provided in the output shaft of the transmission gearbox, and a cooling liquid circulation interlayer connected to the liquid inlet channel and the liquid discharge channel is provided on the side wall of the feeding bin; the liquid inlet cavity is fixedly connected to the top surface of the box body, and the top end of the output shaft of the transmission gearbox is sealed upward and passes through the box body and the liquid inlet cavity in sequence, and a liquid inlet port connected to the liquid inlet channel is provided on the output shaft in the liquid inlet cavity, and the liquid inlet cavity is connected to a liquid inlet pipe; the liquid discharge channel of the output shaft is connected to the rotary joint, and the outer wall of the rotary joint is fixed to the box body.

[0015] The advantages of the present invention are as follows: a central feeding device and a corresponding supporting feeding device are used at the center surrounded by four electrodes to achieve uniform distribution of materials in the center position of the furnace. Specifically, the central feeding drive motor drives the driving shaft and the material balancing plate to rotate synchronously, and the material balancing plate evenly feeds the mixed material falling into the guide barrel to the center position of the furnace.

[0016] The feeding of the four electrode peripheries uses four sets of peripheral feeding devices and corresponding feeding devices to achieve uniform distribution of the material on the periphery of the electrodes. Specifically, the mixture dropped into the feeding bin by the feeding device is first dispersed along the grate plate, and then falls into the space between adjacent dividing partitions. Driven by the power of the driving mechanism, the feeding bin swings in a fan-shaped trajectory around the output shaft of the transmission gear box, and at the same time, the mixture in the feeding bin is evenly fed into the furnace, realizing dispersed material dropping and avoiding the phenomenon of fixed-point material piling.

[0017] In addition, the present invention is provided with a reliable cooling device, a coolant circulation interlayer in the feeding bin, and a liquid inlet channel and a liquid discharge channel on the output shaft, which effectively extend the service life of the feeding bin and ensure the long-term stable operation of the entire feeding system; by arranging an insulating short section and an insulating porcelain bottle to ensure reliable electrical insulation, the upward conduction of current is avoided, which is conducive to ensuring the safe operation of the entire feeding system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the peripheral feeding device of the present invention.

[0020] Figure 3 This is a partial enlarged view of the driving mechanism and transmission gear box of the present invention.

[0021] Figure 4 This is a schematic diagram of the internal structure of the transmission gearbox and cooling device of the present invention.

[0022] Figure 5 This is a schematic diagram of the internal structure of the feeding bin of the present invention.

[0023] Figure 6 This is a schematic diagram of the internal structure of the central feeding device of the present invention.

[0024] Figure 7 This is a schematic structural diagram of the opening and closing valve plate, swing arm, sleeve roller, support arm, and arc guide rail described in the present invention.

[0025] Figure 8 This is a structural diagram of the opening and closing valve plate and the linkage gear of the present invention.

[0026] Figure 9 It is a structural schematic diagram of the feeding device of the present invention that is matched with the peripheral feeding device.

[0027] Figure 10 This is a schematic structural diagram of the insulating short section of the present invention.

[0028] The components in the accompanying drawings are marked as follows: first platform 1, second platform 2, DC ore-fired furnace 3, furnace cover 3.1, electrode 3.2, feeding device 4, weighing silo 4.1, weighing sensor 4.11, upper material pipe 4.2, lower material pipe 4.3, inlet material pipe 4.4, electric gate valve 4.5, insulating short section 4.6, steel pipe 4.61, first flange 4.62, second flange 4.63, insulating ring plate 4.64, bolt 4.65, insulating sleeve 4.66, insulating washer 4.67, high-temperature resistant casting layer 4.68, anchor hook 4.69, pull rod assembly 4.7, basket bolt 4.71, screw 4.72, insulating porcelain bottle 4.73, central feeding device 5, central feeding drive motor 5.1, drive shaft 5.2, guide cylinder 5.3, material balancing tray 5.4, material balancing plate 5.5, peripheral feeding device 6, Feeding bin 6.1, feeding port 6.11, discharging port 6.12, material distribution structure 6.13, grate plate 6.131, material dividing plate 6.132, cooling liquid circulation interlayer 6.14, opening and closing valve plate 6.15, linkage gear 6.16, swing arm 6.17, sleeve roller 6.18, driving mechanism 6.2, cam 6.21, connecting rod 6.22, connecting handle 6.23, peripheral feeding drive motor 6.24, transmission Dynamic gearbox 6.3, box body 6.31, input shaft 6.32, transition shaft 6.33, output shaft 6.34, liquid inlet channel 6.341, liquid discharge channel 6.342, liquid inlet 6.343, spur gear 6.35, bevel gear 6.36, hanging rail 6.4, connector 6.5, cooling device 7, liquid inlet cavity 7.1, rotary joint 7.2, liquid inlet pipe 7.3, support arm 8, arc guide rail 8.1. DETAILED DESCRIPTION

[0029] 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.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside" and "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0031] like Figures 1 to 10As shown, this embodiment provides a feeding system for producing ferroalloy in a DC ore-fired furnace, which includes a first platform 1, a second platform 2, and several sets of feeding devices 4 for feeding materials to the center of an electrode 3.2 and the periphery of the electrode 3.2 respectively; the first platform 1 and the second platform 2 are horizontally arranged in order from top to bottom above the furnace cover 3.1 of the DC ore-fired furnace 3, the feeding device 4 includes a weighing bin 4.1, an upper section material pipe 4.2, a lower section material pipe 4.3, and a furnace inlet material pipe 4.4, the weighing bin 4.1 is installed on the first platform 1, and a weighing device 4 is provided between the weighing bin 4.1 and the first platform 1. A weight sensor 4.11 is provided; the upper material pipe 4.2 is vertically penetrated and fixed on the second platform 2; the bottom discharge port 6.12 of the weighing silo 4.1 is connected to the top of the upper material pipe 4.2, and one end of the lower material pipe 4.3 is connected to the bottom end of the upper material pipe 4.2; the other end of the lower material pipe 4.3 is connected to the nozzle of the furnace feed pipe 4.4; the upper material pipe 4.2 is equipped with an electric gate valve 4.5; after the electric gate valve 4.5 is opened, the mixed material in the weighing silo 4.1 falls into the DC ore-fired furnace 3 through the upper material pipe 4.2, the lower material pipe 4.3, and the furnace feed pipe 4.4 in sequence.

[0032] The lower section of the material pipe 4.3 is connected to an insulating short section 4.6 near the furnace cover 3.1. The insulating short section 4.6 comprises a steel pipe 4.61 and first flanges 4.62 welded to both ends of the steel pipe 4.61. An insulating ring plate 4.64 is clamped on each first flange 4.62 through a second flange 4.63 and fixed with bolts 4.65. An insulating sleeve 4.66 is sleeved on the bolts 4.65. Insulating washers 4.67 are sleeved on both ends of the bolts 4.65 to abut against the corresponding first flange 4.62 and second flange 4.63. Insulating ring plate 4.64, insulating sleeve 4.66, and insulating washer 4.67 on flange nipple 4.6 effectively insulate the pipe 4.61, preventing leakage from the electrode 3.2 from transmitting upward and potentially causing a safety accident. A high-temperature resistant castable layer 4.68 is provided on the inner wall of the steel pipe 4.61, within which anchor hooks 4.69 are embedded to reinforce the castable layer 4.68. A small amount of high-temperature flue gas within the DC submerged arc furnace 3 flows upward into the lower material pipe 4.3, where it protects the steel pipe 4.61 through the high-temperature resistant castable layer 4.68.

[0033] The lower section of the material pipe 4.3 is connected and fixed to the second platform 2 via a tie rod assembly 4.7. The tie rod assembly 4.7 includes two screws 4.72 connected by a basket bolt 4.71. The two ends of the tie rod assembly 4.7 are respectively connected to the second platform 2 and the lower section of the material pipe 4.3 through an insulating porcelain bottle 4.73. The tie rod assembly 4.7 is used to stabilize the lower section of the material pipe 4.3. At the same time, the insulating porcelain bottle 4.73 is provided to further ensure electrical safety.

[0034] In this embodiment, a set of central feeding device 5 is connected to the furnace cover 3.1 at the center surrounded by four electrodes 3.2, and the central feeding device 5 includes a central feeding drive motor 5.1, a drive shaft 5.2, and a material guide cylinder 5.3; a material guide cylinder 5.3 with a barrel opening facing downward is sealed and fixed at the center of the furnace cover 3.1, and a central feeding drive motor 5.1 is fixed on the top surface of the material guide cylinder 5.3. A rotating drive shaft 5.2 is coaxially provided in the material guide cylinder 5.3, and the top end of the drive shaft 5.2 is coaxially connected to the output end of the central feeding drive motor 5.1. A material balancing plate 5.4 placed below the barrel opening of the material guide cylinder 5.3 is fixed to the bottom end of the drive shaft 5.2. The central feeding drive motor 5.1 drives the drive shaft 5.2 to rotate. The dynamic shaft 5.2 and the material distribution disk 5.4 rotate synchronously, which is convenient for evenly feeding the mixed material that falls in; the lower part of the guide cylinder 5.3 is a closing structure, and the diameter of the barrel of the guide cylinder 5.3 is less than or equal to the diameter of the material distribution disk 5.4. The top surface of the material distribution disk 5.4 is evenly fixed with material distribution plates 5.5 along the circumference. The inlet pipe 4.4 that feeds the center of the electrode 3.2 is connected to the guide cylinder 5.3 of the central feeding device 5. The mixed material fed into the guide cylinder 5.3 through the inlet pipe 4.4 falls downward along the guide cylinder 5.3 to the material distribution disk 5.4. During the rotation of the material distribution disk 5.4, the mixed material is evenly dispersed downward by the material distribution plate 5.5, so as to achieve the purpose of evenly feeding the center of the electrode 3.2.

[0035] Four sets of peripheral feeding devices 6 are evenly distributed along the circumference of the furnace cover 3.1 at the periphery of the four electrodes 3.2. The peripheral feeding devices 6 include a feeding bin 6.1, a drive mechanism 6.2 mounted on the top surface of the furnace cover 3.1, and a transmission gearbox 6.3; the drive mechanism 6.2 includes a cam 6.21, a connecting rod 6.22, a connecting handle 6.23, and a peripheral feeding drive motor 6.24; the cam 6.21 is sleeved and fixed on the output end of the peripheral feeding drive motor 6.24, the edge of the cam 6.21 is swingably connected to one end of the connecting rod 6.22 via a connecting column, and the other end of the connecting rod 6.22 is swingably connected to one end of the connecting handle 6.23.

[0036] The transmission gearbox 6.3 comprises a housing 6.31, an input shaft 6.32 rotatably mounted horizontally within the housing 6.31, a transition shaft 6.33 rotatably mounted vertically within the housing 6.31, and an output shaft 6.34. Spur gears 6.35 are mounted and fixedly mounted on the transition shaft 6.33 and the output shaft 6.34, meshing with each other. Bevel gears 6.36 are mounted and fixedly mounted on the input shaft 6.32 and the transition shaft 6.33, meshing with each other. The other end of a connecting handle 6.23 is mounted and fixedly mounted on one end of the input shaft 6.32. The output shaft 6.34 of the transmission gearbox 6.3 passes through the furnace cover 3.1 and is fixedly connected to the top surface of the feeding hopper 6.1, causing the feeding hopper 6.1 to swing back and forth in a fan-shaped trajectory.

[0037] When the peripheral feeding drive motor 6.24 drives the cam 6.21 to rotate in a circle, the connecting rod 6.22 drives one end of the connecting handle 6.23 to swing back and forth around the input shaft 6.32, and at the same time, the input shaft 6.32 of the transmission gear box 6.3 rotates back and forth. Specifically, when the connecting column on the cam 6.21 moves from the nearest end to the farthest end from the input shaft 6.32, the connecting rod 6.22 pulls the connecting handle 6.23 to swing to one side, and at the same time, drives the input shaft 6.32 to rotate forward. Under the transmission action of the bevel gear 6.36 and the spur gear 6.35, The output shaft 6.34 drives the feeding bin 6.1 to swing counterclockwise around the output shaft 6.34; when the connecting column on the cam 6.21 moves from the farthest end to the closest end from the input shaft 6.32, the connecting rod 6.22 pushes the connecting handle 6.23 to swing to the other side, and at the same time, drives the input shaft 6.32 to reverse. Under the transmission action of the bevel gear 6.36 and the spur gear 6.35, the output shaft 6.34 drives the feeding bin 6.1 to swing clockwise around the output shaft 6.34; thus, the feeding bin 6.1 swings back and forth in a fan-shaped trajectory under the drive of the output shaft 6.34.

[0038] A feed pipe 4.4 for feeding materials to the periphery of the electrode 3.2 is fixed to the top surface of the furnace cover 3.1 of the DC submerged arc furnace 3 by a clamp. The bottom end of the feed pipe 4.4 passes through the furnace cover 3.1 and is placed in the DC submerged arc furnace 3. A feed port 6.1 is provided at the top of the feeding bin 6.1, which is movably positioned below the nozzle of the feed pipe 4.4. When the corresponding electric gate valve 4.5 is opened, the mixed material passes through the corresponding feed pipe 4.4 and falls into the feeding bin 6.1 through the feed port 6.11.

[0039] The bottom of the feeding bin 6.1 is provided with a discharge port 6.12 along the length direction. Two symmetrical opening and closing valve plates 6.15 are provided on both sides of the discharge port 6.12 through hinge swing. The opening and closing valve plates 6.15 swing around the hinge axis. When the opening and closing valve plates 6.15 are closed, the end faces of the two opening and closing valve plates 6.15 abut against each other to close the discharge port 6.12. A linkage gear 6.16 is fixed on one end of the hinge axis of the opening and closing valve plates 6.15. The linkage gears 6.16 on the opening and closing valve plate 6.15 are meshed with each other, and an L-shaped swing arm 6.17 is fixed to the other end of the opening and closing valve plate 6.15, and a sleeve roller 6.18 is rotatably connected to one end of the swing arm 6.17; a support arm 8 is fixed to the bottom surface of the furnace cover 3.1 near the pipe mouth of the furnace inlet pipe 4.4, the output shaft 6.34 of the transmission gear box 6.3, the furnace inlet pipe 4.4 that feeds the material to the periphery of the electrode 3.2, and the corresponding support arm 8 are arranged from the inside to the outside along the radius of the DC ore-fired furnace 3; an upwardly protruding arc guide rail 8.1 is fixed to the bottom end of the support arm 8, and when the sleeve roller 6.18 moves from the bottom end of the arc guide rail 8.1 to the high end, the swing arm 6.17 drives the hinge shaft and one of the opening and closing valve plates 6.15 to close. At the same time, under the meshing transmission of the two linkage gears 6.16, the other opening and closing valve plate 6.15 is also synchronously closed until the sleeve roller 6.18 moves to the arc At the highest point of the curved guide rail 8.1, the two opening and closing valve plates 6.15 are closed, at this time, it is convenient for the feeding bin 6.1 to receive the materials. After the materials are received, the feeding bin 6.1 swings away from the curved guide rail 8.1, that is, the sleeve roller 6.18 moves from the high end to the bottom end of the curved guide rail 8.1. During this process, the sleeve roller 6.18 gradually breaks away from the limit of the curved guide rail 8.1. Under the action of the gravity of the mixed material, the opening and closing valve plates 6.15 gradually open and start feeding the materials downward.

[0040] A material distribution structure 6.13 is provided in the feeding bin 6.1. The material distribution structure 6.13 includes two grate plates 6.131 fixed to the inner wall of the feeding bin 6.1. One end of the two grate plates 6.131 is butt-jointed and fixed to the feeding port 6.11 of the feeding bin 6.1. The grate plates 6.131 are tilted downward from the feeding port 6.11 of the feeding bin 6.1 along the length direction of the feeding bin 6.1. The four sides of the grate plates 6.131 are all fitted and fixed to the inner wall of the feeding bin 6.1. A plurality of material distribution partitions 6.132 are fixed at intervals from the bottom of each grate plate 6.131 to the discharge port 6.12 of the feeding bin 6.1. The mixed material falling into the feeding bin 6.1 is first dispersed along the grate plates 6.131 and then falls downward into the furnace through the space between adjacent material distribution partitions 6.132, thereby achieving dispersed material dropout and avoiding the phenomenon of fixed-point material piling.

[0041] The initial state of the opening and closing valve plate 6.15 is closed, and the electric gate valve 4.5 of the corresponding feeding device 4 is opened, and the mixed material is fed into the feeding bin 6.1. When the reduction in the weighing bin 4.1 monitored by the weighing sensor 4.11 reaches the set value, the electric gate valve 4.5 is closed, and the feeding bin 6.1 is controlled by the peripheral feeding drive motor 6.24 to swing. During this process, the sleeve roller 6.18 gradually breaks away from the limit of the arc guide rail 8.1. Under the action of the gravity of the mixed material, the opening and closing valve plate 6.15 gradually opens, and the material begins to be fed downward evenly, achieving uniform feeding to the peripheral position of the electrode 3.2. After the feeding is completed, the peripheral feeding drive motor 6.24 drives the feeding bin 6.1 to swing to the initial position, so that the feeding port 6.11 of the feeding bin 6.1 is placed below the nozzle of the inlet pipe 4.4, and the material continues to be received.

[0042] The bottom surface of the furnace cover 3.1 above each feeding bin 6.1 is fixedly connected to an arc-shaped hanging rail 6.4, and the top surface of the feeding bin 6.1 is fixed with a connecting piece 6.5 that slides along the hanging rail 6.4. The connecting piece 6.5 includes a fixed frame and symmetrical rollers rotatably connected to the fixed frame, and the rollers roll along the hanging rail 6.4; the hanging rail 6.4 and the connecting piece 6.5 play a supporting role for the feeding bin 6.1, and the peripheral feeding drive motor 6.24 controls the feeding bin 6.1 to perform reciprocating swinging motion along the hanging rail 6.4.

[0043] It also includes a cooling device 7, which includes a liquid inlet cavity 7.1 and a rotary joint 7.2; a liquid inlet channel 6.341 and a liquid discharge channel 6.342 are provided in the output shaft 6.34 of the transmission gear box 6.3, and a cooling liquid circulation interlayer 6.14 is provided on the side wall of the feeding bin 6.1, which is connected to the liquid inlet channel 6.341 and the liquid discharge channel 6.342; the liquid inlet cavity 7.1 is fixedly connected to the top surface of the box body 6.31, and the top end of the output shaft 6.34 of the transmission gear box 6.3 is sealed upward and passes through the box body 6.31 and the liquid inlet cavity 7.1 in sequence, and the output shaft 6.34 is rotatably connected to the liquid inlet cavity 7.1; The output shaft 6.34 is provided with a liquid inlet 6.343 connected to the liquid inlet channel 6.341, and the liquid inlet cavity 7.1 is connected to a liquid inlet pipe 7.3; the discharge channel 6.342 of the output shaft 6.34 is connected to a rotary joint 7.2, the outer wall of which is fixed to the housing 6.31; cooling water is fed through the liquid inlet pipe 7.3, flows into the liquid inlet channel 6.341 through the liquid inlet 6.343, and then flows into the cooling liquid circulation interlayer 6.14 to cool the feeding silo 6.1. The cooled water is discharged from the cooling liquid circulation interlayer 6.14 through the discharge channel 6.342, thereby extending the service life of the feeding silo 6.1.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A feeding system for producing ferroalloys in a DC ore-fired furnace, characterized in that: It includes a first platform, a second platform, a furnace cover, and several sets of feeding devices for feeding materials to the center of the electrode and the periphery of the electrode respectively; A central feeding device is connected to the furnace cover at the center of the electrode, and a peripheral feeding device is connected to the furnace cover at the periphery of the electrode; The feeding device includes a weighing bin, an upper material pipe, a lower material pipe, and a furnace feeding pipe; The weighing silo is installed on the first platform, the upper material pipe is vertically passed through and fixed on the second platform, the bottom discharge port of the weighing silo is connected to the top of the upper material pipe, one end of the lower material pipe is connected to the bottom end of the upper material pipe; the other end of the lower material pipe is connected to the pipe mouth of the furnace inlet pipe, and an electric gate valve is installed on the upper material pipe; The feed pipe for feeding the periphery of the electrode is fixed to the top surface of the furnace cover of the DC ore-forming furnace, and the bottom end of the feed pipe passes through the furnace cover and is placed in the DC ore-forming furnace; the feed pipe for feeding the center of the electrode is connected to the guide cylinder of the central feeding device; The peripheral feeding device includes a feeding bin, and a driving mechanism and a transmission gear box installed on the top surface of the furnace cover; the driving mechanism is connected to the input shaft of the transmission gear box, and the output shaft of the transmission gear box passes through the furnace cover and is fixedly connected to the top surface of the feeding bin; the feeding bin swings back and forth in a fan-shaped trajectory, and a feeding port is provided on the top of the feeding bin and is movably placed below the pipe mouth of the furnace feeding pipe; a discharge port is provided at the bottom of the feeding bin, and an opening and closing valve plate is swung at the discharge port, and a material equalization structure is provided in the feeding bin; The bottom surface of the furnace cover above each feeding bin is fixedly connected to an arc-shaped hanging rail, and the top surface of the feeding bin is fixed to a connecting piece that slides along the hanging rail; The material distribution structure includes two grate plates fixed to the inner wall of the feeding bin, one end of the two grate plates are butt-jointed and fixed to the feeding port of the feeding bin, and the grate plates are arranged to be tilted downward from the feeding port of the feeding bin; a number of material dividing partitions are fixed at intervals from the bottom of each grate plate to the feeding port of the feeding bin.

2. The feeding system for producing ferroalloy in a DC ore-fired furnace according to claim 1, characterized in that: An insulating short section is connected to the position of the lower section material pipe adjacent to the furnace cover. The insulating short section includes a steel pipe and a first flange welded to both ends of the steel pipe. An insulating ring plate is provided on each first flange through a second flange clamp and fixed with bolts. An insulating sleeve is provided on the bolt, and insulating washers are provided at both ends of the bolt to abut against the corresponding first flange and second flange. The inner wall of the steel pipe is provided with a high-temperature resistant castable layer, and an anchor hook is buried in the high-temperature resistant castable layer.

3. The feeding system for producing ferroalloy in a DC ore-fired furnace according to claim 1, characterized in that: The lower section material pipe is connected and fixed to the second platform through a pull rod assembly. The pull rod assembly includes two screws connected by a basket bolt. The two ends of the pull rod assembly are respectively connected to the second platform and the lower section material pipe through an insulating porcelain bottle.

4. The feeding system for producing ferroalloy in a DC ore-fired furnace according to claim 1, characterized in that: The central feeding device includes a central feeding drive motor, a drive shaft, and a material guide cylinder; the material guide cylinder is sealed and fixed at the center of the furnace cover, the central feeding drive motor is fixed on the top surface of the material guide cylinder, and the rotating drive shaft is coaxially provided in the material guide cylinder. The top end of the drive shaft is coaxially connected to the output end of the central feeding drive motor, and the bottom end of the drive shaft is fixed with a material balancing tray placed below the barrel mouth of the material guide cylinder, and the top surface of the material balancing tray is evenly fixed with material balancing plates along the circumference.

5. The feeding system for producing ferroalloy in a DC ore-fired furnace according to claim 4, characterized in that: The lower part of the material guiding cylinder is a closing structure, and the diameter of the barrel opening of the material guiding cylinder is less than or equal to the diameter of the material balancing plate.

6. The feeding system for producing ferroalloy in a DC ore-fired furnace according to claim 1, characterized in that: The driving mechanism includes a cam, a connecting rod, a connecting handle and a peripheral feeding drive motor; the cam is sleeved and fixed on the output end of the peripheral feeding drive motor, the edge of the cam is swingably connected to one end of the connecting rod through a connecting column, and the other end of the connecting rod is swingably connected to one end of the connecting handle; The transmission gearbox includes a box body, the horizontally arranged input shaft, the vertically arranged transition shaft and the output shaft, the transition shaft and the output shaft are sleeved and fixed with spur gears that mesh with each other for transmission, and the input shaft and the transition shaft are sleeved and fixed with bevel gears that mesh with each other for transmission; the other end of the connecting handle is sleeved and fixed on one end of the input shaft.

7. The feeding system for producing ferroalloy in a DC ore-fired furnace according to claim 6, characterized in that: It also includes a cooling device, which includes a liquid inlet cavity and a rotary joint; a liquid inlet channel and a liquid discharge channel are provided in the output shaft of the transmission gearbox, and a cooling liquid circulation interlayer connected to the liquid inlet channel and the liquid discharge channel is provided on the side wall of the feeding bin; the liquid inlet cavity is fixedly connected to the top surface of the box body, and the top end of the output shaft of the transmission gearbox is sealed upward and passes through the box body and the liquid inlet cavity in sequence, and a liquid inlet port connected to the liquid inlet channel is provided on the output shaft in the liquid inlet cavity, and the liquid inlet cavity is connected to a liquid inlet pipe; the liquid discharge channel of the output shaft is connected to the rotary joint, and the outer wall of the rotary joint is fixed to the box body.

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