Immersion type continuous discharging device for alumina powder in aluminum electrolysis cell

Abstract

The utility model relates to an immersion type continuous blanking device for alumina powder in an aluminum electrolysis cell, which comprises a blanking assembly, a feeding assembly, a collecting assembly and an alumina stock bin which are fixed on a flue plate support. The blanking amount and the blanking speed of the alumina powder can be strictly controlled, so that the purposes of stability, high efficiency and long service life of the aluminum electrolysis cell can be realized, and the method is suitable for industrial production; and the practicability is very high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of metallurgical industry equipment, and especially relates to a device for submerged continuous feeding of alumina powder in an aluminum electrolysis cell. BACKGROUND

[0002] At present, the aluminum electrolysis cell generally adopts an intermediate point type feeding method, and the main feeding equipment is a constant volume feeder, the constant volume feeding is 1.2-2.2L, and the feeding time interval is 60-180s. Figure 7 .

[0003] The method has the problems that, due to interval feeding, the alumina quantity added into the electrolysis cell melt at a time is large, part of the alumina cannot be dissolved and is deposited at the bottom of the cell, and a large amount of alumina deposits is accumulated at the aluminum liquid layer directly below the feeding hole, the deposits are deposited at the bottom of the cell along with the aluminum liquid flow, which leads to the increase of the furnace bottom pressure drop and the increase of the horizontal current of the cathode, the local cathode current density is too high, which has an adverse effect on the stable operation of the aluminum electrolysis cell and the service life of the cell. SUMMARY

[0004] The utility model wants to solve the technical problem that the feeding quantity cannot be adjusted in the prior art, so that the alumina concentration is 1.5-2.5%, which is helpful for the aluminum electrolysis cell to achieve the goals of stability, high efficiency and long service life.

[0005] To achieve the above-mentioned purposes, the utility model is realized by the following technical schemes:

[0006] A device for submerged continuous feeding of alumina powder in an aluminum electrolysis cell, comprising a feeding assembly fixed on a flue plate support, a feeding assembly, a material collecting assembly and an alumina bin,

[0007] The blanking assembly comprises a first air cylinder, the free end of the piston rod of the first air cylinder is connected with a mounting seat, a servo motor is fixedly connected on the mounting seat, a blanking cylinder is fixedly connected on the lower surface of the mounting seat, a blanking screw rod is arranged in the blanking cylinder, the upper end of the blanking screw rod is drivingly connected with the servo motor through a set of meshing gear sets, a first feeding groove is formed in the side wall of the blanking cylinder on the side of the blanking screw rod, a blanking pipe is connected with the free end of the blanking cylinder, and a blanking hole is formed in the axis of the blanking pipe and is communicated with the blanking cylinder.

[0008] The feeding assembly comprises a guide cylinder arranged in the alumina bin, the guide cylinder is slidingly connected with a guide rod, the upper end of the guide rod is connected with a second air cylinder, a second feeding groove is formed in the lower part of the side of the guide cylinder, and an opening and closing body for blocking the second feeding groove is connected with the free end of the guide rod.

[0009] The collecting assembly comprises an upper flange plate and a lower flange plate which are sleeved on the outer circumferential surface of the blanking cylinder, the collecting cylinder is connected between the upper flange plate and the lower flange plate, the first feeding groove is arranged in the collecting cylinder when the blanking pipe is immersed in the electrolyte solution layer, and the collecting cylinder is communicated with the guide cylinder in the feeding assembly through a bellow.

[0010] As a preferred scheme, the bottom plate is fixed on the flue plate, a plurality of vertical guide rods are arranged on the bottom plate, the upper ends of the guide rods are fixedly connected with the mounting seat, two vertically spaced-apart supporting plates are fixedly connected with the lower parts of the guide rods, the blanking cylinder passes through the supporting plates, a plurality of pins are arranged on the supporting plates outside the blanking cylinder, a bearing sleeve is sleeved on each pin, and the outer surfaces of the bearing sleeves are attached to the outer surface of the blanking cylinder.

[0011] As a preferred scheme, the lower end of the lower flange plate is connected with a cutter supporting cylinder, the cutter supporting cylinder is in the shape of a cylinder and is provided with a plurality of through grooves on the side, and a cleaning cutter for removing the electrolyte material adhered to the outer wall of the blanking pipe is connected to the bottom end face of the cutter supporting cylinder.

[0012] As a preferred scheme, the opening and closing body comprises a column connected with the guide rod, the outer circumferential surface of the column is attached to the inner wall of the guide cylinder, and a conical body is integrally arranged at the bottom of the column.

[0013] As a preferred scheme, the bottom of the blanking screw rod is integrally provided with a connecting part abutting against the upper end of the blanking pipe, a discharging groove is formed in the end face of the connecting part and is communicated with the blanking hole, and the upper end of the discharging groove extends to the side wall of the blanking screw rod.

[0014] Compared with the prior art, the blanking assembly of the utility model has the advantages that the blanking cylinder is arranged in the blanking pipe, the blanking screw rod is arranged in the blanking cylinder, the first feeding groove is arranged in the blanking cylinder, the blanking pipe is connected with the free end of the blanking cylinder, and the blanking hole is formed in the axis of the blanking pipe and is communicated with the blanking cylinder.

[0015] 1. Due to the cooperation of the feeding assembly, the feeding assembly and the material collecting assembly, the feeding amount and the feeding speed of the aluminum oxide powder can be strictly controlled, which helps the aluminum electrolysis cell to realize the goals of stability, high efficiency and long service life;

[0016] 2. The feeding pipe of the device is immersed in the electrolyte solution, which can ensure the rapid dissolution of the aluminum oxide;

[0017] 3. The high-temperature servo motor (320 DEG C) drives the feeding screw to feed, and the feeding speed is adjustable and variable;

[0018] 4. The parts immersed in the electrolyte solution are made of high-temperature alloy materials and heat insulation materials, and can work at 1000 DEG C for a long time; the feeding immersion depth can be automatically adjusted according to the detection of the online electrolyte level, which is suitable for industrial production and has strong practicability. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0021] Figure 3 It is Figure 1 It is a local enlarged view of A in the middle.

[0022] Figure 4 It is a structural schematic diagram of the feeding assembly in the utility model.

[0023] Figure 5 It is a schematic diagram of the internal structure of the feeding assembly in the utility model.

[0024] Figure 6 It is a schematic diagram of the internal structure of the feeding assembly in the utility model.

[0025] Figure 7 It is a schematic diagram of the utility model in actual application.

[0026] Figure 8 It is a schematic diagram of the prior art in the background art in actual application.

[0027] In the diagram: 1. Feeding assembly, 2. Feeding component, 3. Collecting assembly, 4. Alumina hopper, 5. First cylinder, 6. Mounting base, 7. Servo motor, 8. Feeding cylinder, 9. Feeding screw, 901. Connecting part, 902. Discharge chute, 10. First feed chute, 11. Feeding pipe, 12. Feeding hole, 13. Guide cylinder, 14. Guide rod, 15. Second cylinder, 16. Second feed chute, 17. Switch body, 1701. Column, 1702. Conical body, 18. Upper flange, 19. Lower flange, 20. Collecting cylinder, 21. Bellows, 22. Flue plate, 23. Base plate, 24. Guide rod, 25. Support plate, 26. Pin, 27. Bearing sleeve, 28. Cleaning knife support cylinder, 29. Through groove, 30. Cleaning knife. Detailed Implementation

[0028] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0029] like Figures 1-2 The image shows a device for continuous immersion feeding of alumina powder in an aluminum electrolysis cell, comprising a feeding assembly 1, a feeding component 2, a collecting assembly 3, and an alumina silo 4, all fixed to a flue plate 22 support.

[0030] like Figures 4-5 As shown, the feeding assembly 1 includes a first cylinder 5, the free end of the piston rod of the first cylinder 5 is connected to a mounting base 6, a servo motor 7 is fixedly connected to the mounting base 6, a feeding cylinder 8 is fixedly connected to the lower surface of the mounting base 6, a feeding screw 9 is provided inside the feeding cylinder 8, the upper end of the feeding screw 9 is driven and connected to the servo motor 7 through a set of meshing gears, a first feeding groove 10 is provided on the side wall of the feeding cylinder 8 located on the side of the feeding screw 9, a feeding pipe 11 is connected to the free end of the feeding cylinder 8, and a feeding hole 12 communicating with the inside of the feeding cylinder 8 is provided at the axis of the feeding pipe 11.

[0031] like Figure 6 As shown, the feeding assembly 2 includes a guide cylinder 13 installed in the alumina silo 4. The guide cylinder 13 is slidably connected to a guide rod 14. The upper end of the guide rod 14 is connected to the second cylinder 15. A second feeding groove 16 is opened on the lower side of the guide cylinder 13. A switch body 17 for blocking the second feeding groove 16 is connected to the free end of the guide rod 14.

[0032] like Figure 1 As shown, the material collection assembly 3 includes an upper flange 18 and a lower flange 19 sleeved on the outer circumferential surface of the feed cylinder 8. A material collection cylinder 20 is connected between the upper flange 18 and the lower flange 19. The side of the material collection cylinder 20 is connected to the guide cylinder 13 in the feeding assembly 2 via a corrugated pipe 21. When the feed pipe 11 is immersed in the electrolyte solution layer, the first feed trough 10 is located inside the material collection cylinder 20.

[0033] like Figure 3As shown, specifically, the flue plate 22 is fixed with a bottom plate 23, the bottom plate 23 is provided with a plurality of vertical guide rods 24, the upper end of the guide rod 24 is fixedly connected with the mounting seat 6, the lower part of the guide rod 24 is fixedly connected with two vertical spaced-apart supporting plates 25, the blanking cylinder 8 is arranged through the supporting plate 25, the supporting plate 25 outside the blanking cylinder 8 is provided with a plurality of pin shafts 26, each pin shaft 26 is sleeved with a bearing sleeve 27, and the outer surface of each bearing sleeve 27 is attached to the outer surface of the blanking cylinder 8.

[0034] The lower flange plate 19 is connected with a cleaning cutter supporting cylinder 28, the cleaning cutter supporting cylinder 28 is arranged in a cylindrical shape and is provided with a plurality of through grooves 29 on the side surface, and the cleaning cutter supporting cylinder 28 is connected with a cleaning cutter 30 for removing the electrolyte material adhered to the outer wall of the blanking pipe 11 on the bottom end face.

[0035] As shown in the figure, Figure 7 The device is installed on the upper part of the aluminum electrolysis cell, the original shell breaking and blanking position, the end of the blanking pipe 11 in the device is immersed in the electrolyte solution layer to a certain depth H1, and the adjustment of the depth can be completed by driving the vertical movement of the blanking cylinder 8 through the first air cylinder 5; after completion, the rotation of the blanking screw 9 is driven through the servo motor 7, the blanking operation is completed, the alumina powder in the collecting cylinder 20 is sucked into the blanking cylinder 8 from the first feeding groove 10 on the side of the blanking cylinder 8, and then is poured into the blanking hole 12 of the blanking pipe 11 in the spiral direction through the discharge groove 902, so that the alumina powder is introduced into the electrolyte solution layer, wherein the supply of the alumina powder is controlled through the feeding assembly 2; when the second air cylinder 15 controls the vertical upward movement of the guide rod 14, the second feeding groove 16 on the side of the guide cylinder 13 is connected with the alumina bin 4, so that continuous feeding can be carried out; when the second air cylinder 15 controls the vertical downward movement of the guide rod 14, the column body 1701 in the switch body 17 blocks the second feeding groove 16, so that the feeding is stopped; the cleaning cutter supporting cylinder 28 and the cleaning cutter 30 are arranged on the blanking pipe 11, and when the end of the blanking pipe 11 retreats, the cleaning cutter 30 can automatically remove the electrolyte material adhered to the outer wall thereof.

[0036] The utility model is not limited to the above embodiment, on the basis of the technical scheme disclosed in the utility model, the skilled in the art can make some substitutions and deformation to some technical features according to the disclosed technical content without creative labor, and these substitutions and deformation are all within the protection scope of the utility model.

Claims

1. A device for continuous submerged discharging of alumina powder in an aluminium reduction cell, characterised in that: It include the blanking assembly (1) supported on the flue plate (22), the feeding assembly (2), the collecting assembly (3) and the alumina bin (4), The blanking assembly (1) includes a first cylinder (5), the free end of the piston rod of the first cylinder (5) is connected with a mounting seat (6), the mounting seat (6) is fixedly connected with a servo motor (7), the lower surface of the mounting seat (6) is fixedly connected with a blanking cylinder (8), the blanking cylinder (8) is provided with a blanking screw (9) therein, the upper end of the blanking screw (9) is drivingly connected with the servo motor (7) through a set of meshing gear sets, a first feeding groove (10) is formed in the side wall of the blanking cylinder (8) on the side of the blanking screw (9), the free end of the blanking cylinder (8) is connected with a blanking pipe (11), and a blanking hole (12) is formed in the axis of the blanking pipe (11) and communicates with the blanking cylinder (8). The feeding assembly (2) includes a guide cylinder (13) mounted in the alumina bin (4), the guide cylinder (13) is slidingly connected with a guide rod (14), the upper end of the guide rod (14) is connected with a second cylinder (15), a second feeding groove (16) is formed in the lower part of the side of the guide cylinder (13), and the free end of the guide rod (14) is connected with a switch body (17) for blocking the second feeding groove (16). The collecting assembly (3) includes an upper flange plate (18) and a lower flange plate (19) sleeved on the outer peripheral surface of the blanking cylinder (8), the collecting cylinder (20) is connected between the upper flange plate (18) and the lower flange plate (19), the side of the collecting cylinder (20) communicates with the guide cylinder (13) in the feeding assembly (2) through a bellow (21), and when the blanking pipe (11) is immersed in the electrolyte solution layer, the first feeding groove (10) is arranged in the collecting cylinder (20).

2. A device for continuous immersion of alumina powder in an aluminum reduction cell according to claim 1, characterized in that: The flue plate (22) is fixedly connected with a bottom plate (23), a plurality of vertical guide rods (24) are arranged on the bottom plate (23), the upper ends of the guide rods (24) are fixedly connected with the mounting seat (6), two vertically spaced support plates (25) are fixedly connected with the lower parts of the guide rods (24), the blanking cylinder (8) passes through the support plates (25), a plurality of pin shafts (26) are arranged on the support plates (25) outside the blanking cylinder (8), a bearing sleeve (27) is sleeved on each pin shaft (26), and the outer surfaces of the bearing sleeves (27) are attached to the outer surface of the blanking cylinder (8).

3. A device for continuous immersion of alumina powder in an aluminum reduction cell according to claim 2, characterized in that: The lower end of the lower flange plate (19) is connected with a cutter supporting cylinder (28), the cutter supporting cylinder (28) is in the shape of a cylinder and is provided with a plurality of through grooves (29) in the side surface, and a cleaning cutter (30) for removing the electrolyte material adhered to the outer wall of the blanking pipe (11) is connected to the bottom end surface of the cutter supporting cylinder (28).

4. A device for continuous immersion of alumina powder in an aluminum reduction cell according to claim 3, characterized in that: The switch body (17) includes a column body (1701) connected with the guide rod (14), the outer peripheral surface of the column body (1701) is attached to the inner wall of the guide cylinder (13), and a conical body (1702) is integrally arranged at the bottom of the column body (1701).

5. A device for continuous immersion of alumina powder in an aluminum cell according to any one of claims 1 to 4, characterized in that: The bottom of the blanking screw (9) is integrally provided with a connecting part (901) which is in contact with the upper end of the blanking pipe (11), the end face of the connecting part (901) is provided with a discharge groove (902) which is communicated with the blanking hole (12), and the upper end of the discharge groove (902) extends to the side wall of the blanking screw (9).

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