WO2020080038A1 - Dispositif supérieur de four - Google Patents

Dispositif supérieur de four Download PDF

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Publication number
WO2020080038A1
WO2020080038A1 PCT/JP2019/037032 JP2019037032W WO2020080038A1 WO 2020080038 A1 WO2020080038 A1 WO 2020080038A1 JP 2019037032 W JP2019037032 W JP 2019037032W WO 2020080038 A1 WO2020080038 A1 WO 2020080038A1
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WO
WIPO (PCT)
Prior art keywords
gate
rod
central axis
pipe
gate plate
Prior art date
Application number
PCT/JP2019/037032
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English (en)
Japanese (ja)
Inventor
尚文 菅原
Original Assignee
株式会社Ｉｈｉポールワース
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Filing date
Publication date
Application filed by 株式会社Ｉｈｉポールワース filed Critical 株式会社Ｉｈｉポールワース
Publication of WO2020080038A1 publication Critical patent/WO2020080038A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/20—Arrangements of devices for charging

Definitions

  • the present disclosure relates to a furnace top device.
  • Patent Document 1 discloses a technique in which three gate plates are vertically arranged while being displaced at equal intervals around the central axis of the discharge port at the discharge port of the collecting hopper located vertically above the turning chute. It is disclosed.
  • the present disclosure aims to provide a furnace top device capable of dropping raw materials right under an opening.
  • a furnace top apparatus is provided at a discharge port of a collecting hopper positioned vertically above a swirling chute, and has two end portions at least partially facing each other.
  • An inner gate portion having an inner gate plate, and two outer portions that are provided outside the inner gate portion and are displaced with respect to the inner gate portion around the central axis of the discharge port, and at least part of the end portions face each other.
  • An outer gate portion having a gate plate.
  • the two inner gate plates may be swingable around a common first central axis that intersects the central axis of the outlet.
  • the two outer gate plates may be swingable around a common second central axis that intersects the central axis of the outlet and the first central axis.
  • the swing angle of the inner gate plate and the swing angle of the outer gate plate may be different so that the spacing between the two inner gate plates and the spacing between the two outer gate plates are equal.
  • the surface area of the inner gate plate and the surface area of the outer gate plate may be different.
  • At least one of the inner gate portion and the outer gate portion may be capable of closing the discharge port.
  • a first rod to which one inner gate plate is connected a first pipe which is arranged coaxially with the first rod and to which the other inner gate plate is connected, and a common actuator for the first rod and the first pipe
  • a first link mechanism connected to the second inner gate plate so that the swing angle of the one inner gate plate in the separating direction is equal to the swing angle of the other inner gate plate in the separating direction. It may have a different link ratio.
  • a second rod to which one outer gate plate is connected, a second pipe coaxially arranged with the second rod and to which the other outer gate plate is connected, and a common actuator for the second rod and the second pipe.
  • a second link mechanism connected to the second link mechanism so that the swing angle of the one outer gate plate in the separating direction and the swing angle of the other outer gate plate in the separating direction are equal to each other. It may have a different link ratio.
  • the raw material can be dropped right under the opening.
  • FIG. 1 is an explanatory diagram illustrating an outline of a vertical furnace system including a furnace top device according to the present embodiment.
  • FIG. 2 is a front view showing the configuration of the gate device.
  • FIG. 3 is a side view showing the configuration of the gate device.
  • FIG. 4 is a partial perspective view of the gate device in the closed state.
  • FIG. 5 is a partial perspective view of the gate device in the open state.
  • FIG. 6 is a schematic diagram showing the configuration of a drive mechanism for swinging the inner gate plate.
  • FIG. 7 is a schematic diagram showing the configuration of a drive mechanism for swinging the inner gate plate.
  • FIG. 8 is an explanatory diagram illustrating the operation of the gate device of the comparative example.
  • FIG. 8A shows a gate device of a comparative example in a closed state.
  • FIG. 8B shows the gate device of the comparative example in the open state.
  • FIG. 9 is an explanatory diagram illustrating the operation of the gate device of this embodiment.
  • FIG. 9A shows a front view of the gate device of the present embodiment.
  • FIG. 9B shows a side view of the gate device according to the present embodiment.
  • FIG. 1 is an explanatory diagram illustrating an outline of a vertical furnace system 1 including a furnace top device 20 according to the present embodiment.
  • the charging direction of the raw material is indicated by a two-dot chain line arrow.
  • the vertical furnace system 1 includes a vertical furnace 10 and a furnace top device 20.
  • the furnace top device 20 includes a hopper 22, a switching chute 24, a conveyor head pulley 26, a conveyor 28, a collecting hopper 30, a gate device 38, a vertical chute 40, a swiveling chute drive device 42, and a swiveling chute 44.
  • the vertical furnace 10 is, for example, a blast furnace that produces iron from a raw material M such as iron ore and coke.
  • the vertical furnace 10 is not limited to the blast furnace.
  • the vertical furnace 10 is formed in a substantially cylindrical shape.
  • a plurality of (for example, three) hoppers 22 are arranged above the vertical furnace 10.
  • the hopper 22 is formed in a substantially cylindrical shape.
  • Each hopper 22 is eccentrically arranged with respect to the core of the vertical furnace 10.
  • the hoppers 22 are arranged at equal intervals (for example, 120 degree intervals) in the circumferential direction of the vertical furnace 10.
  • the number of hoppers 22 is not limited to three and may be two, for example. In that case, the two hoppers 22 are arranged at intervals of 180 degrees in the circumferential direction of the vertical furnace 10.
  • a switching chute 24 is arranged above the hopper 22.
  • the switching chute 24 is arranged approximately on the extension line of the core.
  • the switching chute 24 is formed in a curved tubular shape.
  • the switching chute 24 is rotatable around a rotation axis along the extension line of the core.
  • the switching chute 24 is not limited to the rotary type, but may be a so-called damper type or swing type.
  • a conveyor head pulley 26 is arranged above the switching chute 24.
  • a conveyor 28 is connected to the conveyor head pulley 26. The conveyor 28 extends so as to be separated from the switching chute 24.
  • the collecting hopper 30 is arranged between the hopper 22 and the vertical furnace 10. The lower part of each hopper 22 is collected on the upper part of the collecting hopper 30.
  • the collecting hopper 30 includes a conical portion 32 and a skirt portion 34.
  • the conical portion 32 is formed in a hollow conical shape whose horizontal cross-sectional area gradually decreases as it goes vertically downward.
  • the skirt portion 34 is formed in a hollow cylindrical shape and extends in the vertical direction. The vertically upper end portion of the skirt portion 34 is continuous with the lower portion of the conical portion.
  • a discharge port 36 that opens vertically downward is formed at the vertically lower end of the skirt portion 34. The central axis of the discharge port 36 substantially overlaps with the core.
  • the discharge port 36 is provided with a gate device 38 for opening and closing the discharge port 36. The gate device 38 will be described in detail later.
  • a vertical chute 40, a turning chute drive device 42, and a turning chute 44 are provided below the collecting hopper 30.
  • the vertical chute 40 is formed in a hollow cylindrical shape and extends vertically below the discharge port 36. The lower end of the vertical chute 40 is inserted into the vertical furnace 10.
  • the turning chute drive device 42 is arranged above the vertical furnace 10.
  • the swirling chute 44 is located in the vertical furnace 10.
  • the turning chute 44 is formed in a cylindrical shape, for example. One end of the turning chute 44 is connected to the lower end of the vertical chute 40.
  • the swirling chute 44 is rotated by a swirling chute drive device 42 about a rotation axis along the core, and the furnace wall side can be tilted about the core side as a fulcrum.
  • the swirling chute 44 is inclined so that the furnace wall side is located vertically downward with respect to the core side.
  • the conveyor 28 conveys the raw material M to be charged into the vertical furnace 10 to the conveyor head pulley 26.
  • the conveyor head pulley 26 feeds the raw material M into the switching chute 24.
  • the switching chute 24 distributes the charged raw material M to any one of the plurality (for example, three) of the hoppers 22.
  • the hopper 22 temporarily stores the raw material M input through the switching chute 24.
  • the hopper 22 discharges the stored raw material M to the collecting hopper 30 at a predetermined timing.
  • the collecting hopper 30 temporarily stores the raw material M discharged from the hopper 22.
  • a weighing unit 50 is provided in the collecting hopper 30.
  • the weighing unit 50 measures the storage amount of the raw material M stored in the collecting hopper 30.
  • the weighing unit 50 is a load cell or the like.
  • the measuring unit 50 measures the weight of the raw material M to measure the stored amount.
  • the measuring unit 50 may measure the storage amount by measuring the deposition height of the raw material M in the collecting hopper 30.
  • the furnace top device 20 is provided with a gate control unit 52.
  • the gate control unit 52 is composed of a semiconductor integrated circuit including a central processing unit (CPU), a ROM in which programs and the like are stored, a RAM as a work area, and the like.
  • the gate control unit 52 controls opening / closing of the gate device 38 based on the measurement result by the measurement unit 50. For example, the gate control unit 52 opens the gate device 38 when the storage amount of the raw material M in the collecting hopper 30 becomes equal to or larger than the predetermined upper limit value. Further, the gate control unit 52 closes the gate device 38 when the storage amount of the raw material M in the collecting hopper 30 becomes equal to or lower than a predetermined lower limit value. When the gate device 38 is opened, the raw material M in the collecting hopper 30 is discharged vertically downward from the discharge port 36.
  • the raw material M discharged from the collecting hopper 30 falls on the turning chute 44 through the vertical chute 40.
  • the swirling chute 44 charges the raw material M discharged from the collecting hopper 30 into the vertical furnace 10 while rotating and tilting.
  • the vertical furnace 10 reduces the charged raw material M to generate iron.
  • a drop position adjustment unit 54 may be provided inside the hopper 22.
  • the drop position adjusting unit 54 is formed in a plate shape.
  • the drop position adjusting unit 54 is provided in the middle of the drop path of the raw material M that is put into the hopper 22.
  • the drop position adjusting unit 54 can adjust the drop position of the raw material M by changing the tilt direction and the tilt angle.
  • FIG. 2 is a front view showing the configuration of the gate device 38.
  • FIG. 3 is a side view showing the configuration of the gate device 38.
  • FIG. 4 is a partial perspective view of the gate device 38 in the closed state.
  • FIG. 5 is a partial perspective view of the gate device 38 in the open state.
  • the gate device 38 includes an inner gate portion 102 and an outer gate portion 104.
  • the inner gate portion 102 includes two inner gate plates 110, a first shaft portion 112 and a first auxiliary shaft portion 114.
  • the inner gate plate 110 is formed into a half bowl shape.
  • the two inner gate plates 110 are arranged so that the ends 116 on the bottom side of the bowl face each other. That is, the two inner gate plates 110 are integrated in a bowl shape by the ends 116 on the bottom side being close to each other.
  • the two inner gate plates 110 are arranged close to the outlet 36 so that the inner surface of the bowl faces the outlet 36.
  • the first shaft portion 112 includes a rod-shaped first rod 120 and a cylindrical first pipe 122.
  • the first rod 120 is inserted into the first pipe 122.
  • the central axis of the first pipe 122 matches the central axis of the first rod 120. That is, the first pipe 122 is arranged coaxially with the first rod 120.
  • the first rod 120 and the first pipe 122 extend horizontally.
  • the central axis common to the first rod 120 and the first pipe 122 will be referred to as the first central axis C10.
  • the first central axis C10 intersects the central axis C of the discharge port 36.
  • a shaft support portion 124 is provided on the outer periphery of the first pipe 122.
  • the shaft support portion 124 is fixed to, for example, the collecting hopper 30.
  • a bearing 126 and a gas seal 128 are provided between the shaft support portion 124 and the first pipe 122.
  • the shaft support portion 124 supports the first pipe 122 through a bearing 126 so as to be rotatable around the first central axis C10.
  • the gas seal 128 prevents dust from entering between the shaft support portion 124 and the first pipe 122.
  • a bearing 130 and a gas seal 132 are provided between the first pipe 122 and the first rod 120.
  • the first pipe 122 supports the first rod 120 through the bearing 130 so as to be rotatable about the first central axis C10.
  • the gas seal 132 prevents dust from entering between the first pipe 122 and the first rod 120.
  • One of the two inner gate plates 110 is connected to the end of the first rod 120 on the side of the collecting hopper 30.
  • the inner gate plate 110 connected to the first rod 120 can swing (rotate) around the first central axis C10 as the first rod 120 rotates, as shown by a double-headed arrow A10.
  • a lever 134 is connected to an end of the first rod 120 opposite to the collecting hopper 30. The lever 134 extends from the first rod 120 in the radial direction.
  • the other inner gate plate 110 of the two inner gate plates 110 is connected to the end of the first pipe 122 on the collecting hopper 30 side.
  • the inner gate plate 110 connected to the first pipe 122 can swing (rotate) around the first central axis C10 as the first pipe 122 rotates, as shown by a double-headed arrow A12.
  • a lever 136 is connected to an end of the first pipe 122 opposite to the collecting hopper 30. The lever 136 extends from the first pipe 122 in the radial direction.
  • the first auxiliary shaft portion 114 includes a rod-shaped first auxiliary rod 140 and a cylindrical first auxiliary pipe 142.
  • the first auxiliary rod 140 is inserted into the first auxiliary pipe 142.
  • the first auxiliary rod 140 and the first auxiliary pipe 142 extend coaxially with the first central axis C10 on the side opposite to the first shaft portion 112 with the collecting hopper 30 interposed therebetween.
  • An auxiliary shaft support 144 is provided on the outer circumference of the first auxiliary pipe 142.
  • the auxiliary shaft support portion 144 is fixed to the collecting hopper 30, for example.
  • a bearing 146 and a gas seal 148 are provided between the auxiliary shaft support portion 144 and the first auxiliary pipe 142.
  • the auxiliary shaft support portion 144 supports the first auxiliary pipe 142 through the bearing 146 so as to be rotatable around the first central axis C10.
  • the gas seal 148 prevents dust from entering between the auxiliary shaft support portion 144 and the first auxiliary pipe 142.
  • a bearing 150 and a gas seal 152 are provided between the first auxiliary pipe 142 and the first auxiliary rod 140.
  • the first auxiliary pipe 142 supports the first auxiliary rod 140 rotatably around the first central axis C10 through the bearing 150.
  • the gas seal 152 prevents dust from entering between the first auxiliary pipe 142 and the first auxiliary rod 140.
  • the inner gate plate 110 connected to the first rod 120 is connected to the end of the first auxiliary rod 140 on the collecting hopper 30 side.
  • the first auxiliary rod 140 supports the swing (rotation) of the inner gate plate 110 connected to the first rod 120.
  • the inner gate plate 110 connected to the first pipe 122 is connected to the end of the first auxiliary pipe 142 on the side of the collecting hopper 30.
  • the first auxiliary pipe 142 supports the swing (rotation) of the inner gate plate 110 connected to the first pipe 122.
  • the outer gate portion 104 includes two outer gate plates 210, a second shaft portion 212 and a second auxiliary shaft portion 214.
  • the outer gate plate 210 is formed in a half bowl shape.
  • the two outer gate plates 210 are arranged so that the ends 216 on the bottom side of the bowl face each other. That is, the two outer gate plates 210 are integrated in a bowl shape by the ends 216 on the bottom side being close to each other.
  • the two outer gate plates 210 are arranged close to the inner gate plate 110 such that the inner surface of the bowl faces the outer surface of the inner gate plate 110.
  • the second shaft portion 212 includes a rod-shaped second rod 220 and a cylindrical second pipe 222.
  • the second rod 220 is inserted into the second pipe 222.
  • the central axis of the second pipe 222 matches the central axis of the second rod 220. That is, the second pipe 222 is arranged coaxially with the second rod 220.
  • the second rod 220 and the second pipe 222 extend horizontally.
  • the central axis common to the second rod 220 and the second pipe 222 will be referred to as the second central axis C20.
  • the second central axis C20 intersects the central axis C of the outlet 36 and the first central axis C10.
  • the second central axis C20 is displaced by 90 degrees around the central axis C of the discharge port 36 with respect to the first central axis C10.
  • the height of the second central axis C20 in the central axis C direction of the discharge port 36 is equal to that of the first central axis C10.
  • a shaft support portion 224 is provided on the outer periphery of the second pipe 222.
  • the shaft support portion 224 is fixed to the collecting hopper 30, for example.
  • a bearing 226 and a gas seal 228 are provided between the shaft support portion 224 and the second pipe 222.
  • the shaft support portion 224 supports the second pipe 222 through the bearing 226 so as to be rotatable around the second central axis C20.
  • the gas seal 228 prevents dust from entering between the shaft support portion 224 and the second pipe 222.
  • a bearing 230 and a gas seal 232 are provided between the second pipe 222 and the second rod 220.
  • the second pipe 222 supports the second rod 220 through the bearing 230 so as to be rotatable about the second central axis C20.
  • the gas seal 232 prevents dust from entering between the second pipe 222 and the second rod 220.
  • One of the two outer gate plates 210 is connected to the end of the second rod 220 on the side of the collecting hopper 30.
  • the outer gate plate 210 connected to the second rod 220 can swing (rotate) around the second central axis C20 as the second rod 220 rotates, as shown by a double-headed arrow A20.
  • a lever 234 is connected to the side of the second rod 220 opposite to the collecting hopper 30. The lever 234 extends from the second rod 220 in the radial direction.
  • the other outer gate plate 210 of the two outer gate plates 210 is connected to the end of the second pipe 222 on the side of the collecting hopper 30.
  • the outer gate plate 210 connected to the second pipe 222 can swing (rotate) around the second central axis C20 as the second pipe 222 rotates, as shown by a double-headed arrow A22.
  • a lever 236 is connected to the side of the second pipe 222 opposite to the collecting hopper 30. The lever 236 extends in the radial direction from the second pipe 222.
  • the second auxiliary shaft portion 214 includes a rod-shaped second auxiliary rod 240 and a cylindrical second auxiliary pipe 242.
  • the second auxiliary rod 240 is inserted into the second auxiliary pipe 242.
  • the second auxiliary rod 240 and the second auxiliary pipe 242 extend coaxially with the second central axis C20 on the side opposite to the second shaft portion 212 with the collecting hopper 30 interposed therebetween.
  • An auxiliary shaft support portion 244 is provided on the outer circumference of the second auxiliary pipe 242.
  • the auxiliary shaft support portion 244 is fixed to the collecting hopper 30, for example.
  • a bearing 246 and a gas seal 248 are provided between the auxiliary shaft support portion 244 and the second auxiliary pipe 242.
  • the auxiliary shaft support portion 244 supports the second auxiliary pipe 242 through the bearing 246 so as to be rotatable around the second central axis C20.
  • the gas seal 248 prevents dust from entering between the auxiliary shaft support portion 244 and the second auxiliary pipe 242.
  • a bearing 250 and a gas seal 252 are provided between the second auxiliary pipe 242 and the second auxiliary rod 240.
  • the second auxiliary pipe 242 supports the second auxiliary rod 240 through the bearing 250 so as to be rotatable around the second central axis C20.
  • the gas seal 252 prevents dust from entering between the second auxiliary pipe 242 and the second auxiliary rod 240.
  • An outer gate plate 210 connected to the second rod 220 is connected to an end of the second auxiliary rod 240 on the collecting hopper 30 side.
  • the second auxiliary rod 240 supports the swing (rotation) of the outer gate plate 210 connected to the second rod 220.
  • the outer gate plate 210 connected to the second pipe 222 is connected to the end of the second auxiliary pipe 242 on the collecting hopper 30 side.
  • the second auxiliary pipe 242 supports swing (rotation) of the outer gate plate 210 connected to the second pipe 222.
  • the two outer gate portions 104 are provided outside the inner gate portion 102 and displaced by 90 degrees about the central axis C of the discharge port 36 with respect to the inner gate portion 102.
  • the two inner gate plates 110 and the two outer gate plates 210 are swung in the directions in which they are separated from each other, thereby forming an opening 260 that opens vertically downward, as shown in FIG. It
  • the opening 260 is surrounded by the end 116 of the inner gate plate 110 and the end 216 of the outer gate plate 210.
  • the inner gate plate 110 and the outer gate plate 210 swing so that the opening 260 is substantially square.
  • the radius of gyration from the second central axis C20 to the outer gate plate 210 is longer than the radius of gyration from the first central axis C10 to the inner gate plate 110. Therefore, if the swing angle of the inner gate plate 110 and the swing angle of the outer gate plate are equal, the opening 260 does not have a square shape.
  • the inner gates are arranged so that the distance between the two inner gate plates 110 and the distance between the two outer gate plates 210 are equal (so that the opening 260 has a substantially square shape).
  • the swing angle of the plate 110 and the swing angle of the outer gate plate 210 are made different. Specifically, the swing angle of the outer gate plate 210 is smaller than the swing angle of the inner gate plate 110.
  • the discharge port 36 can be closed as shown in FIG. .
  • the inner gate portion 102 closes the discharge port 36.
  • the outer gate unit 104 may be capable of closing the discharge port 36 without being limited to the mode in which the inner gate unit 102 closes the discharge port 36. It is sufficient that at least one of the inner gate portion 102 and the outer gate portion 104 can close the discharge port 36.
  • the area of the plate surface of the inner gate plate 110 and the area of the plate surface of the outer gate plate 210 are different. Specifically, the area of the plate surface of the outer gate plate 210 is smaller than the area of the plate surface of the inner gate plate 110.
  • the outer gate plate 210 only needs to be able to form the opening 260 having a predetermined opening degree, and does not have to have an area for closing the discharge port 36.
  • the area of the plate surface of the outer gate plate 210 may be larger than the area of the plate surface of the inner gate plate 110.
  • the gate device 38 includes a drive mechanism that swings the inner gate plate 110 and a drive mechanism that swings the outer gate plate 210.
  • the drive mechanism that swings the inner gate plate 110 and the drive mechanism that swings the outer gate plate 210 have the same configuration. Therefore, the drive mechanism that swings the inner gate plate 110 will be described, and the description of the drive mechanism that swings the outer gate plate 210 will be omitted.
  • FIG. 6 and 7 are schematic diagrams showing the configuration of the drive mechanism 310 for swinging the inner gate plate 110.
  • FIG. 6 shows the case where the two inner gate plates 110 are close to each other (the inner gate portion 102 is in the closed state).
  • FIG. 7 shows the case where the two inner gate plates 110 are separated from each other (the inner gate portion 102 is in the open state).
  • the drive mechanism 310 includes an actuator 320 and a link mechanism 330.
  • the actuator 320 includes, for example, a cylindrical cylinder 322 and a rod-shaped piston rod 324. One end of the piston rod 324 is inserted into the cylinder 322. The other end of the piston rod 324 projects from the cylinder 322.
  • the gate controller 52 slides the piston rod 324 in the axial direction with respect to the cylinder 322.
  • the link mechanism 330 includes a common link 332, a first intermediate link 334, and a second intermediate link 336.
  • the common link 332 is formed in a substantially triangular plate shape.
  • a rotary shaft 338 that penetrates the common link 332 is provided substantially at the center of the common link 332.
  • the common link 332 is rotatable around the rotation shaft 338.
  • the tip of the piston rod 324 is rotatably connected near the apex of 1 in the common link 332.
  • the first intermediate link 334 is formed in a substantially rectangular plate shape. One end of the first intermediate link 334 is rotatably connected to the common link 332 near the apex on the opposite side of the piston rod 324 with the rotary shaft 338 interposed therebetween. The other end of the first intermediate link 334 is rotatably connected to a lever 134 connected to the first rod 120.
  • the second intermediate link 336 is formed in a substantially rectangular plate shape. One end of the second intermediate link 336 is rotatably connected to the rotating shaft 338 of the common link 332 near the apex on the first pipe 122 side. The other end of the second intermediate link 336 is rotatably connected to a lever 136 connected to the first pipe 122.
  • the piston rod 324 is drawn into the cylinder 322.
  • the common link 332 is rotated around the rotation shaft 338 in the clockwise direction of FIG.
  • the first intermediate link 334 causes the lever 134 and the first rod 120 to rotate in the clockwise direction in FIG. 6.
  • the second intermediate link 336 brings the lever 136 and the first pipe 122 into a state of being rotated counterclockwise in FIG. 6.
  • the two inner gate plates 110 connected to the first rod 120 and the first pipe 122 are in a closed state with the ends 116 coming close to each other.
  • the swing angle of the inner gate plate 110 connected to the first rod 120 in the separating direction and the swing angle of the inner gate plate 110 connected to the first pipe 122 in the separating direction are equal to each other. It has a good link ratio.
  • the drive mechanism for swinging the outer gate plate 210 has the same structure as the drive mechanism 310. That is, the drive mechanism that swings the outer gate plate 210 includes an actuator and a link mechanism.
  • This link mechanism like the link mechanism 330, has a swinging angle in the separation direction of the outer gate plate 210 connected to the second rod 220 and a separation direction of the outer gate plate 210 connected to the second pipe 222.
  • the link ratio is such that the rocking angle of is equal.
  • FIG. 8 is an explanatory diagram illustrating the operation of the gate device of the comparative example.
  • FIG. 8A shows a gate device of a comparative example in a closed state.
  • FIG. 8B shows the gate device of the comparative example in the open state.
  • a plurality of gate plates B10 are arranged so as to overlap in the vertical direction. That is, in the gate device of the comparative example, the end portions B12 of the gate plate B10 do not face each other.
  • the raw material discharged through the gate plate B10 falls to a position displaced from the central axis C of the discharge port 36. Specifically, the falling position of the raw material is shifted to the gate plate B10 side (the left side in FIG. 8B) which is located relatively vertically above.
  • the dropping position of the raw material shifts with respect to the central axis of the discharge port 36 in this way, the dropping position of the raw material is displaced from the core at the upper end of the swirling chute 44. Then, for example, the distance that the raw material slides on the turning chute 44 differs depending on whether the turning chute 44 is tilted to the right in FIG. 8B or is tilted to the left. As a result, the speed of the raw material in the horizontal direction is different, so that the charging position of the raw material into the furnace varies. The variation in the charging position of the raw material may affect the quality of the product.
  • FIG. 9 is an explanatory diagram for explaining the operation of the gate device 38 of the present embodiment.
  • FIG. 9A shows a front view of the gate device 38 of the present embodiment.
  • FIG. 9B shows a side view of the gate device 38 of the present embodiment.
  • the ends 116 of the two inner gate plates 110 face each other. Therefore, in the gate device 38 of the present embodiment, the positions of the end portions 116 of both the inner gate plates 110 in the vertical direction are approximately the same. As a result, the velocity components in the facing direction of the inner gate plates 110 in the raw material discharged through the space between the two inner gate plates 110 become approximately equal. Therefore, in the gate device 38, it is possible to prevent the dropping position of the discharged raw material from being biased toward the facing direction of the inner gate plate 110.
  • the end portions 216 of the two outer gate plates 210 face each other. Therefore, in the gate device 38 of the present embodiment, the positions of the end portions 216 of both outer gate plates 210 in the vertical direction are approximately equal. Thereby, the velocity components in the facing direction of the outer gate plate 210 in the raw material discharged through the space between the two outer gate plates 210 become substantially equal. Therefore, in the gate device 38, it is possible to prevent the falling position of the discharged raw material from being biased in the direction opposite to the outer gate plate 210.
  • the gate device 38 of the present embodiment can suppress the deviation of the falling position of the raw material between the facing direction of the inner gate plate 110 and the facing direction of the outer gate plate 210 that intersect each other vertically.
  • the raw material can be dropped right under the opening 260 of the gate apparatus 38. That is, in the gate device 38 of the present embodiment, it is possible to prevent the falling position of the raw material from being displaced from the central axis C of the discharge port 36.
  • the distance that the raw material slides on the swirling chute 44 is approximately constant regardless of the rotation position of the swiveling chute 44. Therefore, it is possible to suppress variations in the charging position of the raw material into the furnace.
  • the ends 116 of the two inner gate plates 110 face each other.
  • at least a part of the end portions 116 may face each other. If at least a part of the end portions 116 face each other, the velocity components in the facing direction of the inner gate plate 110 become substantially equal, and the deviation of the raw material in the facing direction of the inner gate plate 110 can be suppressed.
  • at least a part of the end portions 216 of the two outer gate plates 210 may face each other.
  • the two inner gate plates 110 can swing around a common first central axis C10 that intersects with the central axis C of the discharge port 36.
  • the two outer gate plates 210 can swing around a common second central axis C20 that intersects the central axis C of the discharge port 36 and the first central axis C10.
  • the total number of drive mechanisms 310 that swing the inner gate plate 110 and the outer gate plate 210 can be suppressed to two.
  • the two drive mechanisms 310 are in a positional relationship of being displaced by 90 degrees around the central axis C.
  • the turning chute drive device 42 can be arranged without interfering with the drive mechanism 310.
  • the swing angle of the inner gate plate 110 and the outer side are set so that the distance between the two inner gate plates 110 and the distance between the two outer gate plates 210 are equal.
  • the swing angle of the gate plate 210 is different. Therefore, in the gate device 38 of the present embodiment, the opening 260 can be formed into a substantially square shape, and the raw material can be more reliably dropped directly below the opening 260.
  • the area of the plate surface of the inner gate plate 110 and the area of the plate surface of the outer gate plate 210 are different. Therefore, in the gate device 38 of the present embodiment, the outer gate portion 104 can be made compact.
  • At least one of the inner gate portion 102 and the outer gate portion 104 can close the discharge port 36. That is, in the gate device 38 of the present embodiment, the other of the inner gate portion 102 and the outer gate portion 104 may not be able to close the discharge port 36. Therefore, in the gate device 38 of the present embodiment, it is possible to prevent the size of the gate device 38 from increasing.
  • the link mechanism 330 of the drive mechanism 310 that swings the inner gate plate 110 the swing angle of the one inner gate plate 110 in the separating direction and the swing angle of the other inner gate plate 110 in the separating direction are equal.
  • the link ratio is as follows. Therefore, in the gate device 38 of the present embodiment, the two inner gate plates 110 can be symmetrically swung by the common actuator 320 about the common first central axis C10.
  • the swing angle of the one outer gate plate 210 in the separating direction and the swing angle of the other outer gate plate 210 in the separating direction are equal to each other. It has a good link ratio. Therefore, in the gate device 38 of the present embodiment, the two outer gate plates 210 can be symmetrically swung by the common actuator 320 about the common second central axis C20.
  • link mechanism 330 of the drive mechanism 310 that swings the inner gate plate 110 in the above embodiment corresponds to the first link mechanism of the present invention.
  • link mechanism of the drive mechanism that swings the outer gate plate 210 in the above embodiment corresponds to the second link mechanism of the present invention.
  • the present disclosure can be used for a furnace top device.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Blast Furnaces (AREA)

Abstract

Cette invention concerne un dispositif supérieur de four, comprenant : une partie trappe intérieure (102) ayant deux plaques de trappe intérieure (110) dont des parties d'extrémité (116) se font face au moins partiellement, qui sont disposées dans un orifice de décharge (36) d'une trémie de collecte (30) positionnée verticalement au-dessus d'une goulotte rotative ; et, à l'extérieur de la partie trappe intérieure (102), une partie trappe extérieure (104) ayant deux plaques de trappe extérieure (210) dont des parties d'extrémité se font face au moins partiellement, qui sont disposées de façon à être décalées autour de l'axe central de l'orifice de décharge (36) par rapport à la partie trappe intérieure (102).
PCT/JP2019/037032 2018-10-19 2019-09-20 Dispositif supérieur de four WO2020080038A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018197789A JP7154101B2 (ja) 2018-10-19 2018-10-19 炉頂装置
JP2018-197789 2018-10-19

Publications (1)

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WO2020080038A1 true WO2020080038A1 (fr) 2020-04-23

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57125191A (en) * 1981-01-27 1982-08-04 Nippon Steel Corp Cut gate
JPS6299596U (fr) * 1985-12-12 1987-06-25
JPH08246011A (ja) * 1995-03-07 1996-09-24 Kawasaki Steel Corp 高炉の原料装入方法およびその装置
JPH09249906A (ja) * 1996-03-14 1997-09-22 Ishikawajima Harima Heavy Ind Co Ltd 炉頂装入装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57125191A (en) * 1981-01-27 1982-08-04 Nippon Steel Corp Cut gate
JPS6299596U (fr) * 1985-12-12 1987-06-25
JPH08246011A (ja) * 1995-03-07 1996-09-24 Kawasaki Steel Corp 高炉の原料装入方法およびその装置
JPH09249906A (ja) * 1996-03-14 1997-09-22 Ishikawajima Harima Heavy Ind Co Ltd 炉頂装入装置

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JP2020063503A (ja) 2020-04-23

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