A self-submerged feeding device for aluminum molten smelting furnace

Abstract

The invention discloses a self-submerged feeding device for an aluminum liquid smelting furnace, comprising a feed hopper and a molten pool interconnected with each other, the inner cavity of the feed hopper is set in a funnel shape, a feed port is set at the bottom of the inner cavity of the feed hopper, a side opening is opened at the bottom of the side wall of the feed hopper, and the feed port and the side opening are connected through a discharge channel; the molten pool is surrounded by a hollow structure through the molten pool wall and the furnace bottom, a furnace port is set on one side of the molten pool wall close to the feed hopper, and the furnace port is connected with the side opening through a feed channel; a cover plate is set on the top surface of the feed hopper, and a baffle is connected to the bottom surface of the cover plate, and the baffle opens or blocks the feed port when it moves up and down. The invention has a reasonable layout and a compact structure, and realizes submerged operation by reasonably limiting the height of the furnace port. At the same time, through the design of a funnel-shaped feed container and an inclined channel, it realizes rapid transfer, reduces burning loss and slag formation, thereby effectively improving the quality of the melt, reducing energy consumption and saving costs.

Description

Technical Field

[0001] The invention relates to the field of electrolytic aluminum liquid smelting and casting equipment, in particular to a self-submerged feeding device for an aluminum liquid smelting furnace. Background Art

[0002] In the common smelting and casting production of electrolytic aluminum liquid, there are two main ways to put the electrolytic aluminum liquid into the furnace. One is to pour the aluminum liquid directly through the feed port, and the other is to transfer it into the furnace through the siphon tube by the siphon method. Both methods have their advantages and disadvantages. The direct pouring method is easy to operate and has a fast transfer speed, but it is easy to cause aluminum liquid to splash and injure people, slag, and there are safety and quality risks. At the same time, the feed port jumps fire and heat dissipation during heating, causing energy waste; the siphon method can effectively solve the problem of aluminum liquid splashing and injuring people and slag, which is beneficial to the improvement of melt quality, but the transfer efficiency is low, and there must be a front road that satisfies the aluminum liquid to form a vacuum during the undercurrent, and the aluminum liquid in the front furnace must always be kept at a high temperature. At the same time, there is also the problem of energy waste caused by the feed port jumping fire and heat dissipation during heating. The energy consumption of the undercurrent will be higher, and the undercurrent tube needs to be preheated when used intermittently, otherwise it will cause the tube to be blocked and unable to work. Therefore, undercurrent transfer is rarely adopted in production. Summary of the invention

[0003] The purpose of the present invention is to provide a self-submerged feeding device for an aluminum liquid smelting furnace, so as to solve the problem of energy waste caused by fire jumping at the feeding port and heat dissipation in the direct pouring method and siphon method of feeding molten aluminum into the furnace listed in the background technology.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention discloses a self-submerged feeding device for an aluminum liquid smelting furnace, comprising a feeding hopper and a molten pool which are interconnected, wherein the inner cavity of the feeding hopper is configured to be in a funnel shape, a feeding port is provided at the bottom of the inner cavity of the feeding hopper, a side opening is provided at the bottom of the side wall of the feeding hopper, and the feeding port and the side opening are connected via a discharge channel; the molten pool is surrounded by a molten pool wall and a furnace bottom to form a hollow structure, a furnace inner opening is provided on one side of the molten pool wall close to the feeding hopper, and the furnace inner opening is connected to the side opening via a feeding channel; a cover plate is provided on the top surface of the feeding hopper, a baffle is connected to the bottom surface of the cover plate, and the baffle opens or blocks the feeding port when moving up and down.

[0006] Furthermore, the bottom surface of one end of the cover plate is hinged to the top edge of the hopper, and the bottom surface of the cover plate extending to the outside of the hopper is connected to a cylinder, the end surface of the telescopic rod of the cylinder is hinged to the cover plate, and the bottom of the cylinder is mounted on the cylinder bracket by a bolt assembly, and the cylinder bracket is connected to the outer wall of the hopper.

[0007] Furthermore, the cylinder bracket is composed of a horizontal plate and an inclined plate, one end of the horizontal plate and the inclined plate is positioned and connected to the outer wall of the hopper, the other end of the inclined plate is welded to the bottom surface of the horizontal plate, and the cylinder is connected to the top surface of the horizontal plate.

[0008] Furthermore, the height of the bottom edge of the furnace inner opening from the furnace bottom is controlled to be 150-200 mm, the upper edge of the outer opening of the feed channel is flush with the top of the feed port, and the angle α between the bottom surface of the feed channel and the horizontal line of the furnace bottom is set to 45°-60°.

[0009] Furthermore, the angle β between the inclined bottom surface of the discharge channel and the horizontal line of the furnace bottom is set to 10° to 15°, and the bottom surface of the discharge channel and the bottom surface of the inner cavity of the feed hopper are located in the same plane.

[0010] Furthermore, the hopper, the molten pool wall and the furnace bottom are all built with high temperature resistant refractory materials.

[0011] Furthermore, the high temperature resistant refractory material includes high temperature resistant high alumina bricks, thermal insulation bricks or low cement castables.

[0012] Furthermore, the baffle is connected to the bottom surface of the cover plate through a connecting steel chain.

[0013] Compared with the prior art, the beneficial technical effects of the present invention are:

[0014] 1) The inner cavity of the hopper is set to a funnel shape. The funnel-shaped container can reduce aluminum liquid splashing, eliminate safety hazards, and reduce aluminum liquid burning loss; at the same time, the funnel-shaped container has a large mouth and a small bottom, which is easy to clean, thereby reducing the labor intensity of workers and extending the service life;

[0015] 2) Both the discharge channel and the inlet channel are designed to be inclined. The inclined aluminum liquid channel can reduce slagging and aluminum hanging, and the channel is relatively smooth;

[0016] 3) The height design of the furnace inlet is more reasonable, which makes it easy to realize submerged feeding. The furnace inlet is only 150-200mm away from the furnace bottom. During the feeding process of molten aluminum, as the amount of molten aluminum in the furnace increases, the furnace inlet is closed by the molten aluminum, and the subsequent molten aluminum enters the furnace to form a submerged flow, thus solving the slag formation and burning caused by the tumbling of molten aluminum due to the large drop in the original feeding inlet, effectively reducing the secondary pollution of the melt and improving the quality;

[0017] 4) When the aluminum liquid in the furnace closes the furnace port, the flame cannot jump out during the heating process of the aluminum liquid, which solves the problem of flame jumping out of the original inlet and reduces the disadvantages of energy waste and safety hazards;

[0018] 5) The design of the self-lifting baffle, after the feeding is completed, the baffle at the feeding port is driven by the cylinder, which can effectively prevent the heat from dissipating. At the same time, it can prevent the flame from jumping out when the empty furnace is heated, thus reducing energy consumption;

[0019] 6) The design of the cover plate: after the feeding is completed, the cover plate is driven by the cylinder to rotate and fall, closing the top opening of the hopper, which can effectively reduce the heat dissipation in the hopper.

[0020] In general, the present invention has a reasonable layout and a compact structure. It realizes submerged flow operation by reasonably limiting the height of the furnace mouth. At the same time, through the funnel-shaped feeding container and the inclined channel design, it realizes rapid transfer, reduces burning loss and slag formation, thereby effectively improving the melt quality, reducing energy consumption and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 This is a front view of the self-submerged feeding device of the aluminum liquid smelting furnace of the present invention;

[0023] Figure 2 It is a side view of the submerged feeding device of the aluminum liquid smelting furnace of the present invention;

[0024] Explanation of the reference numerals in the accompanying drawings: 1. feed hopper; 2. cover plate; 3. baffle; 4. feed port; 5. feed channel; 6. furnace opening; 7. molten pool wall; 8. furnace bottom; 9. molten pool; 10. discharge channel; 11. cylinder bracket; 12. cylinder; 13. connecting steel chain. DETAILED DESCRIPTION

[0025] like Figure 1-2 As shown, a self-submerged feeding device for aluminum liquid smelting furnace comprises a feed hopper 1 and a molten pool 9 which are interconnected, the inner cavity of the feed hopper 1 is set in a funnel shape, a feed port 4 is set at the bottom of the inner cavity of the feed hopper 1, a side opening is opened at the bottom of the side wall of the feed hopper 1, and the feed port 4 is connected to the side opening through a discharge channel 10; the molten pool 9 is surrounded by a molten pool wall 7 and a furnace bottom 8 to form a hollow structure, the molten pool wall 7 is provided with a furnace port 6 on one side close to the feed hopper 1, and the furnace port 6 is connected to the side opening through a feed channel 5; a cover plate 2 is set on the top surface of the feed hopper 1, and a baffle 3 is connected to the bottom surface of the cover plate 2, and the baffle 3 opens or blocks the feed port 4 when it moves up and down. Specifically, the funnel-shaped feed hopper can reduce aluminum liquid splashing, eliminate safety hazards, and reduce aluminum liquid burning loss; the funnel-shaped feed hopper as a container has a large mouth and a small bottom, which is easy to clean, thereby reducing the labor intensity of workers and extending the service life.

[0026] Specifically, the bottom surface of one end of the cover plate 2 is hinged to the top edge of the feed hopper 1, and the cover plate 2 is extended to the bottom surface outside the feed hopper 1 and is connected to a cylinder 12, the end surface of the telescopic rod of the cylinder 12 is hinged to the cover plate 2, and the bottom of the cylinder 12 is mounted on the cylinder bracket 11 through a bolt assembly, and the cylinder bracket 11 is connected to the outer wall of the feed hopper 1.

[0027] The cylinder support 11 is composed of a horizontal plate and an inclined plate, one end of the horizontal plate and the inclined plate is positioned and connected to the outer wall of the hopper 1, the other end of the inclined plate is welded to the bottom surface of the horizontal plate, and the cylinder 12 is connected to the top surface of the horizontal plate.

[0028] The height of the bottom edge of the furnace inner opening 6 from the furnace bottom 8 is controlled to be 150-200 mm, the upper edge of the outer opening of the feed channel 5 is flush with the top of the feed port 4, and the angle α between the bottom surface of the feed channel 5 and the horizontal line of the furnace bottom is set to 45°-60°.

[0029] The angle β between the inclined bottom surface of the discharge channel and the horizontal line of the furnace bottom is set to 10° to 15°, and the bottom surface of the discharge channel and the bottom surface of the inner cavity of the feed hopper 1 are located in the same plane.

[0030] The feed hopper 1, the molten pool wall 7 and the furnace bottom 8 are all built with high temperature resistant refractory materials. Specifically, the high temperature resistant refractory materials include high temperature resistant high alumina bricks, insulation bricks or low cement castables.

[0031] Specifically, the baffle 3 is connected to the bottom surface of the cover plate 2 through a connecting steel chain 13. The baffle 3 is connected to the lower end of the connecting steel chain. The baffle 3 is cast from a high-temperature resistant casting material and has a certain weight. When moving up and down, the connecting steel chain pulls it to slide along the slope of the feed hopper, which can ensure a close fit with the inner cavity slope of the feed hopper.

[0032] The use process of the present invention is as follows:

[0033] When in use, the cylinder 12 is first started, and the telescopic rod of the cylinder 12 is contracted to drive the cover plate 2 to rotate and lift, thereby opening the entrance of the hopper 1. At the same time, the baffle 3 is driven to move upward by connecting the steel chain, and the feed port 4 is opened. At this time, the hopper 1 and the molten pool 8 are in a connected state. After the molten aluminum enters the hopper, it enters the molten pool 8 through the feed port 4, the discharge channel 10, the feed channel 5 and the furnace port 6; wherein the discharge channel 10 and the feed channel 5 are both set as inclined surfaces, which facilitates the smooth flow of aluminum liquid and can reduce the occurrence of slagging and aluminum hanging problems. When the height of the aluminum liquid in the molten pool is higher than the height of the furnace port 6, submerged feeding can be achieved, thereby solving the slagging and burning caused by the rolling of aluminum liquid due to the large drop in the original feed port, effectively reducing the secondary pollution of the melt and improving the quality.

[0034] When the aluminum liquid in the molten pool reaches the set height, stop pouring the aluminum liquid into the hopper. When the aluminum liquid is in the cavity of the hopper, the telescopic rod of the cylinder 12 extends, driving the cover plate 2 to rotate in the opposite direction to seal the top opening of the hopper 1. At the same time, the connecting steel chain 13 drives the baffle plate 3 to move downward to close the feed opening. After the feeding is completed, the baffle plate closes the discharge channel 10 and the feed channel 5, which can effectively prevent the heat from dissipating. At the same time, it can prevent the flame from jumping out when the empty furnace is heated, reducing energy consumption; after the feeding is completed, the cover plate closes the top opening of the hopper, which can effectively reduce the heat dissipation in the hopper.

[0035] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A self-submerged feeding device for aluminum molten melting furnace, characterized in that: The invention comprises a feed hopper (1) and a molten pool (9) which are interconnected, wherein the inner cavity of the feed hopper (1) is arranged in a funnel shape, a feed port (4) is arranged at the bottom of the inner cavity of the feed hopper (1), a side opening is arranged at the bottom of the side wall of the feed hopper (1), and the feed port (4) and the side opening are connected via a discharge channel (10); the molten pool (9) is surrounded by a molten pool wall (7) and a furnace bottom (8) to form a hollow structure, a furnace port (6) is arranged on one side of the molten pool wall (7) close to the feed hopper (1), and the furnace port (6) is connected to the side opening via a feed channel (5); A cover plate (2) is arranged on the top surface of the feed hopper (1), and a baffle (3) is connected to the bottom surface of the cover plate (2), and the baffle (3) opens or blocks the feed opening (4) when moving up and down; The bottom surface of one end of the cover plate (2) is hinged on the top edge of the feed hopper (1); the bottom surface of the cover plate (2) extending to the outside of the feed hopper (1) is connected to a cylinder (12); the end surface of the telescopic rod of the cylinder (12) is hinged on the cover plate (2); the bottom of the cylinder (12) is mounted on a cylinder bracket (11) via a bolt assembly; and the cylinder bracket (11) is connected to the outer side wall of the feed hopper (1); The cylinder support (11) is composed of a horizontal plate and an inclined plate, one end of the horizontal plate and the inclined plate is positioned and connected to the outer wall of the feed hopper (1), the other end of the inclined plate is welded to the bottom surface of the horizontal plate, and the cylinder (12) is connected to the top surface of the horizontal plate; The baffle plate (3) is connected to the bottom surface of the cover plate (2) via a connecting steel chain (13).

2. The self-submerged feeding device for aluminum liquid smelting furnace according to claim 1 is characterized in that: The height of the bottom edge of the furnace inner opening (6) from the furnace bottom (8) is controlled to be 150 to 200 mm, the upper edge of the outer opening of the feed channel (5) is flush with the top of the feed port (4), and the angle α between the bottom surface of the feed channel (5) and the horizontal line of the furnace bottom is set to 45° to 60°.

3. The self-submerged feeding device for aluminum liquid smelting furnace according to claim 1 is characterized in that: The angle β between the inclined bottom surface of the discharge channel (10) and the horizontal line of the furnace bottom is set to 10° to 15°, and the bottom surface of the discharge channel and the bottom surface of the inner cavity of the feed hopper (1) are located in the same plane.

4. The self-submerged feeding device for aluminum liquid smelting furnace according to claim 1 is characterized in that: The feed hopper (1), the molten pool wall (7) and the furnace bottom (8) are all built with high temperature resistant refractory materials.

5. The self-submerged feeding device for aluminum liquid smelting furnace according to claim 4 is characterized in that: The high temperature resistant refractory material includes high temperature resistant high alumina bricks, thermal insulation bricks or low cement castables.

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