Return iron adding device for closed electric furnace

Abstract

The utility model relates to the field of metal remelting, in particular to a remelting iron adding device for a closed electric furnace, which comprises the closed electric furnace, a lower cavity is arranged on the upper surface of the closed electric furnace, an upper cavity is fixedly connected to the surface of the lower cavity, a base plate is fixedly connected to the surface of the upper cavity, a sealing valve is arranged in the upper cavity, and a sealing groove is formed in the sealing valve. A material flowing pipeline is fixedly connected to the upper surface of the upper cavity, a feeding port is formed in the upper surface of the material flowing pipeline, a valve is arranged on the surface of the material flowing pipeline, a second air inlet is formed in the upper cavity, a first air inlet is formed in the lower cavity, and a second air inlet is formed in the lower cavity. According to the utility model, through the arrangement of the dust removal device, when recirculated iron is poured into the upper cavity from the feeding hole, a large amount of dust is generated, and the entering dust can be effectively intercepted and collected, so that the environment in the furnace is kept pure.

Description

Technical Field

[0001] The utility model relates to the field of metal recycling, in particular to a recycling iron adding device for a closed electric furnace. Background Art

[0002] Remelting refers to the process of remelting and reusing scrap metals or alloys. This process is very important in industrial production because it helps save resources, reduce environmental pollution, and promote sustainable development.

[0003] The main process of recycling includes collecting scrap metal, sorting, smelting and other steps. First, the scrap metal is collected and then sorted according to its composition and properties. Then, the scrap metal is sent to the furnace for smelting, which melts it at high temperature and removes impurities. Finally, the molten metal can be used again to produce new metal products.

[0004] However, in the existing recycling process, all workers operate and use a semi-open furnace, which may lead to safety hazards such as harmful gas leakage or explosion. In the fully manual recycling process, a large amount of dust will be generated during the feeding process, causing serious pollution to the environment and causing great harm to the workers' health. Utility Model Content

[0005] In order to solve the above problems, the utility model aims to provide a device for adding return iron to a closed electric furnace.

[0006] The utility model provides a device for adding recycled iron to a closed electric furnace, comprising a closed electric furnace, a lower cavity is arranged on the upper surface of the closed electric furnace, an upper cavity is fixedly connected to the surface of the lower cavity, a pad is fixedly connected to the surface of the upper cavity, a sealing valve is arranged inside the upper cavity, a flow pipe is fixedly connected to the upper surface of the upper cavity, a feed port is arranged on the upper surface of the flow pipe, a valve is arranged on the surface of the flow pipe, a second air inlet is provided inside the upper cavity, a first air inlet is provided inside the lower cavity, a dangerous gas detection device is arranged on the surface of the lower cavity, the lower surface of the lower cavity is communicated with the closed electric furnace, a first exhaust pipe is fixedly connected to the surface of the lower cavity, the first exhaust pipe is communicated with the first air inlet, an axial flow fan is fixedly connected to the surface of the first exhaust pipe by screws, a return air pipe is fixedly connected to the surface of the axial flow fan, a volute suction fan is arranged on the surface of the upper cavity, the volute suction fan is communicated with the second air inlet, and a dust air duct is fixedly connected to the surface of the volute suction fan.

[0007] Preferably, a dust removal device is fixedly connected to the surface of the dust and wind duct, a second supporting frame is arranged on the surface of the dust removal device, a second exhaust pipe is fixedly connected to the surface of the dust removal device, a bellows is fixedly connected to the surface of the second exhaust pipe, a third exhaust pipe is fixedly connected to the surface of the bellows, a first supporting frame is fixedly connected to the lower surface of the bellows, an L-shaped plate is fixedly connected to the upper surface of the first supporting frame by bolts, a fan is fixedly connected to the surface of the L-shaped plate, and a dust removal device is fixedly connected to the lower surface of the dust removal device.

[0008] Preferably, the axial flow fan comprises a casing, an air permeable plate is arranged on the inner wall surface of the casing, a fixing column is fixedly connected to the surface of the air permeable plate, a motor is arranged on the surface of the fixing column, and a fan blade is sleeved on the surface of the motor shaft. When the fan blade rotates, it pushes the air to flow in an axial straight line, so that the airflow passes through the air permeable plate in a direction parallel to the fan rotation axis and enters the return air duct.

[0009] Preferably, the sealing valve includes a handle, a middle supporting plate is fixedly connected to the surface of the handle, a sealing partition is fixedly connected to the surface of the middle supporting plate, a sliding rail is slidably connected to the surface of the sealing partition, there are two sliding rails, which are symmetrically arranged on both sides of the sealing partition, the sliding rails are fixedly connected to the inner walls of the upper cavity and the lower cavity, a telescopic cylinder is arranged above the sealing partition, the telescopic cylinder is fixedly connected to the inner walls of the upper cavity and the lower cavity, a stopper is fixedly connected to the lower surface of the telescopic cylinder, a spring is fixedly connected between the telescopic cylinder and the stopper, and the number of the spring, telescopic cylinder, and stopper is three respectively. By setting the stopper, the recycled iron can be swept off the surface of the sealing partition when the sealing valve is opened to avoid spilling outside the device, the handle is pulled to make the sealing partition slide in the sliding rail, and the stopper slides relative to the sealing partition to clean up all the recycled iron.

[0010] Preferably, the number of the volute suction fans is four, the number of the flow pipes and the first air inlets are three respectively, and the number of the dust and wind pipes, the pads, and the sealing valves are two respectively.

[0011] Preferably, a sealing gasket is provided at the connection between the sealing valve and the opening of the upper cavity and the backing plate.

[0012] Preferably, the furnace shell of the closed electric furnace is welded from boiler steel plates and has a certain heat resistance. The surface of the furnace shell is lined with a furnace lining to provide heat preservation and insulation for smelting.

[0013] The technical effects that can be obtained by the technical means of the utility model are:

[0014] (1) The utility model sets a dangerous gas detection device. When the amount of harmful gas contained in the lower cavity exceeds the standard, the axial flow fan is started. When the fan blades rotate, they push the air to flow in a straight axial direction, so that the airflow passes through the air permeable plate in a direction parallel to the rotating axis of the fan and enters the return air duct, thereby absorbing the harmful gas therein, and using the return air duct to guide the harmful gas CO to the combustion furnace or sintering kiln and other equipment to achieve the purpose of recycling.

[0015] (2) The utility model provides a dust removal device. When the returned iron is poured into the upper cavity from the feed port, a large amount of dust is generated. The dust entering can be effectively intercepted and collected, thereby maintaining the purity of the furnace environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0018] Figure 3 It is a schematic diagram of a partially cutaway three-dimensional structure of the back side of the utility model.

[0019] Figure 4 It is a partial cross-sectional three-dimensional structural schematic diagram of the axial flow fan of the utility model.

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the sealing valve of the utility model.

[0021] In the figure, 1, closed electric furnace; 2, first exhaust pipe; 3, dangerous gas detection device; 4, axial flow fan; 401, air permeable plate; 402, fixed column; 403, motor; 404, fan blade; 405, casing; 5, return air duct; 6, dust and wind duct; 7, volute suction fan; 8, feed inlet; 9, upper cavity; 10, pad; 11, lower cavity; 12, sealing valve; 1201, spring; 1202, telescopic cylinder; 1 203, stopper; 1204, handle; 1205, middle supporting plate; 1206, slide rail; 1207, sealing partition; 13, valve; 14, flow pipe; 15, first air inlet; 16, second air inlet; 17, dust removal device; 18, second exhaust pipe; 19, third exhaust pipe; 20, bellows; 21, L-shaped plate; 22, fan; 23, first support frame; 24, dust removal device; 25, second support frame. DETAILED DESCRIPTION

[0022] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0023] Example

[0024] A preferred embodiment of the present invention is as follows Figures 1 to 5 As shown: A device for adding recycled iron to a closed electric furnace, comprising a closed electric furnace 1, a lower cavity 11 is arranged on the upper surface of the closed electric furnace 1, an upper cavity 9 is fixedly connected to the surface of the lower cavity 11, a pad 10 is fixedly connected to the surface of the upper cavity 9, a sealing valve 12 is arranged inside the upper cavity 9, a flow pipe 14 is fixedly connected to the upper surface of the upper cavity 9, a feed port 8 is arranged on the upper surface of the flow pipe 14, a valve 13 is arranged on the surface of the flow pipe 14, a second air inlet 16 is opened inside the upper cavity 9, and a first air inlet 16 is opened inside the lower cavity 11. An air inlet 15, a dangerous gas detection device 3 is arranged on the surface of the lower cavity 11, the lower surface of the lower cavity 11 is communicated with the closed electric furnace 1, a first exhaust pipe 2 is fixedly connected to the surface of the lower cavity 11, the first exhaust pipe 2 is communicated with the first air inlet 15, an axial flow fan 4 is fixedly connected to the surface of the first exhaust pipe 2 by screws, a return air pipe 5 is fixedly connected to the surface of the axial flow fan 4, a volute suction fan 7 is arranged on the surface of the upper cavity 9, the volute suction fan 7 is communicated with the second air inlet 16, and a dust wind duct 6 is fixedly connected to the surface of the volute suction fan 7.

[0025] Furthermore, a dust removal device 17 is fixedly connected to the surface of the dust and wind duct 6, a second support frame 25 is arranged on the surface of the dust removal device 17, a second exhaust pipe 18 is fixedly connected to the surface of the dust removal device 17, a bellows 20 is fixedly connected to the surface of the second exhaust pipe 18, a third exhaust pipe 19 is fixedly connected to the surface of the bellows 20, a first support frame 23 is fixedly connected to the lower surface of the bellows 20, an L-shaped plate 21 is fixedly connected to the upper surface of the first support frame 23 by bolts, a fan 22 is fixedly connected to the surface of the L-shaped plate 21, and a dust removal device 24 is fixedly connected to the lower surface of the dust removal device 17.

[0026] Furthermore, the axial flow fan 4 includes a housing 405, an air permeable plate 401 is provided on the inner wall surface of the housing 405, a fixing column 402 is fixedly connected to the surface of the air permeable plate 401, a motor 403 is provided on the surface of the fixing column 402, and a fan blade 404 is sleeved on the surface of the rotating shaft of the motor 403. When the fan blade 404 rotates, it pushes the air to flow in an axial straight line, so that the airflow passes through the air permeable plate 401 in a direction parallel to the rotating axis of the fan and enters the return air pipe 5.

[0027] Furthermore, the sealing valve 12 includes a handle 1204, a middle supporting plate 1205 is fixedly connected to the surface of the handle 1204, a sealing partition 1207 is fixedly connected to the surface of the middle supporting plate 1205, a sliding rail 1206 is slidably connected to the surface of the sealing partition 1207, there are two sliding rails 1206, which are symmetrically arranged on both sides of the sealing partition 1207, the sliding rails 1206 are fixedly connected to the inner walls of the upper cavity 9 and the lower cavity 11, a telescopic cylinder 1202 is arranged above the sealing partition 1207, the telescopic cylinder 1202 is fixedly connected to the inner walls of the upper cavity 9 and the lower cavity 11, a stopper 1203 is fixedly connected to the lower surface of the telescopic cylinder 1202, a spring 1201 is fixedly connected between the telescopic cylinder 1202 and the stopper 1203, and the number of the spring 1201, the telescopic cylinder 1202 and the stopper 1203 are three respectively. By setting the stopper 1203, the returned iron can be swept off the surface of the sealing partition 1207 when the sealing valve 12 is opened to prevent it from spilling outside the device. The handle 1204 is pulled to make the sealing partition 1207 slide in the slide rail 1206, and the stopper 1203 slides relative to the sealing partition 1207 to clean up all the returned iron.

[0028] Furthermore, the number of the volute suction fans 7 is four, the number of the flow pipes 14 and the first air inlets 15 are three respectively, and the number of the dust and wind pipes 6, the pads 10, and the sealing valves 12 are two respectively.

[0029] Furthermore, a sealing gasket is provided at the connection between the sealing valve 12 and the opening of the upper cavity 9 and the backing plate 10 .

[0030] In addition, the furnace shell of the closed electric furnace 1 is welded from boiler steel plates and has a certain heat resistance. The surface of the furnace shell is lined with a furnace lining, which plays a role in heat preservation and heat insulation for smelting.

[0031] Working principle: When the utility model is used, Figures 1 to 5As shown, when in use, the coarse recycled iron is poured from the feed port 8, the number of the rotary valves 13 is determined according to the amount of falling, and the upper sealing valve 12 is closed. When the recycled iron is poured from the feed port 8 into the upper cavity 9, it gathers on the upper surface of the sealing valve 12, generating a large amount of dust. The volute suction fan 7 is started to suck the dust-containing gas from the second air inlet 16, and the dust-containing gas enters the dust removal device 17 through the dust and air duct 6. The fan 22 is started to drive the device in the bellows 20 to rotate, and the clean gas after dust removal is sucked through the second exhaust pipe 18, and then discharged from the third exhaust pipe 19. The returned iron is collected in the lower cavity 11, and the axial flow fan 4 is started. When the fan blades 404 rotate, the air is pushed to flow in a straight line along the axial direction, so that the airflow passes through the air permeable plate 401 in a direction parallel to the rotating axis of the fan, and enters the return air pipe 5, and the generated harmful gas CO is led to the combustion furnace or sintering kiln and other equipment to achieve the purpose of recycling. Finally, the lower valve 12 is opened and then closed, so that the returned iron falls into the sealed electric furnace for melting.

[0032] The above description is only an illustrative specific implementation method of the utility model, and is not intended to limit the scope of the utility model. Any equivalent changes and modifications made by any technician in this field without departing from the concept and principle of the utility model should fall within the scope of protection of the utility model. It should also be noted that the various components of the utility model are not limited to the above-mentioned overall application. The various technical features described in the specification of the utility model can be selected for use alone or in combination according to actual needs. Therefore, the utility model should naturally cover other combinations and specific applications related to the utility model points of this case.

Claims

1. A device for adding recycled iron to a closed electric furnace, characterized in that: The sealed electric furnace (1) comprises a lower cavity (11) on the upper surface of the sealed electric furnace (1), the surface of the lower cavity (11) is fixedly connected to the upper cavity (9), the surface of the upper cavity (9) is fixedly connected to a pad (10), a sealing valve (12) is arranged inside the upper cavity (9), a flow pipe (14) is fixedly connected to the upper surface of the upper cavity (9), a feed port (8) is arranged on the upper surface of the flow pipe (14), a valve (13) is arranged on the surface of the flow pipe (14), a second air inlet (16) is opened inside the upper cavity (9), a first air inlet (15) is opened inside the lower cavity (11), and the The surface of the lower cavity (11) is provided with a hazardous gas detection device (3); the lower surface of the lower cavity (11) is communicated with the sealed electric furnace (1); the surface of the lower cavity (11) is fixedly connected with a first exhaust pipe (2); the first exhaust pipe (2) is communicated with a first air inlet (15); the surface of the first exhaust pipe (2) is fixedly connected with an axial flow fan (4) by screws; the surface of the axial flow fan (4) is fixedly connected with a return air pipe (5); the surface of the upper cavity (9) is provided with a volute suction fan (7); the volute suction fan (7) is communicated with a second air inlet (16); the surface of the volute suction fan (7) is fixedly connected with a dust and air duct (6).

2. A device for adding recycled iron to a closed electric furnace as claimed in claim 1, characterized in that: The surface of the dust and air duct (6) is fixedly connected to a dust removal device (17), the surface of the dust removal device (17) is provided with a second support frame (25), the surface of the dust removal device (17) is fixedly connected to a second exhaust pipe (18), the surface of the second exhaust pipe (18) is fixedly connected to a bellows (20), the surface of the bellows (20) is fixedly connected to a third exhaust pipe (19), the lower surface of the bellows (20) is fixedly connected to a first support frame (23), the upper surface of the first support frame (23) is fixedly connected to an L-shaped plate (21) by bolts, the surface of the L-shaped plate (21) is fixedly connected to a fan (22), and the lower surface of the dust removal device (17) is fixedly connected to a dust removal device (24).

3. A device for adding recycled iron to a closed electric furnace as claimed in claim 1, characterized in that: The axial flow fan (4) comprises a casing (405), an air permeable plate (401) is arranged on the inner wall surface of the casing (405), a fixing column (402) is fixedly connected to the surface of the air permeable plate (401), a motor (403) is arranged on the surface of the fixing column (402), and a fan blade (404) is sleeved on the surface of the rotating shaft of the motor (403).

4. A device for adding recycled iron to a closed electric furnace as claimed in claim 1, characterized in that: The sealing valve (12) comprises a handle (1204), a middle support plate (1205) is fixedly connected to the surface of the handle (1204), a sealing baffle (1207) is fixedly connected to the surface of the middle support plate (1205), a sliding rail (1206) is slidably connected to the surface of the sealing baffle (1207), two sliding rails (1206) are symmetrically arranged on both sides of the sealing baffle (1207), and the sliding rails (1206) are symmetrically arranged on the upper cavity (9) and the lower cavity (11). The sealing partition (1207) is fixedly connected to the wall, a telescopic cylinder (1202) is arranged above the sealing partition (1207), the telescopic cylinder (1202) is fixedly connected to the inner wall of the upper cavity (9) and the lower cavity (11), a block (1203) is fixedly connected to the lower surface of the telescopic cylinder (1202), a spring (1201) is fixedly connected between the telescopic cylinder (1202) and the block (1203), and the number of the spring (1201), the telescopic cylinder (1202) and the block (1203) is three respectively.

5. The device for adding recycled iron to a closed electric furnace as claimed in claim 1, characterized in that: The number of the volute suction fans (7) is four, the number of the flow pipes (14) and the first air inlets (15) are three respectively, and the number of the dust and wind pipes (6), the pads (10), and the sealing valves (12) are two respectively.

6. A device for adding recycled iron to a closed electric furnace as claimed in claim 1, characterized in that: A sealing gasket is provided at the connection between the sealing valve (12), the upper cavity (9) and the opening of the gasket (10).

7. A device for adding recycled iron to a closed electric furnace as claimed in claim 1, characterized in that: The furnace shell of the closed electric furnace (1) is welded from boiler steel plates, and a furnace lining is laid on the surface of the furnace shell.

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