Secondary aluminum smelting device

Abstract

The secondary aluminum smelting device comprises a smelting furnace and a treatment box, the treatment box is fixedly installed on the top face of the smelting furnace, and the bottom of the treatment box communicates with the top of the smelting furnace through a material through hole; the feeding hopper fixedly penetrates through the top of the treatment box; the discharging pipe fixedly penetrates through the lower end of the left side wall of the smelting furnace, and a valve is mounted on the discharging pipe; the shell is fixedly installed on the right side face of the smelting furnace and the right side face of the treatment box. The material crushing mechanism is arranged on the treatment box; and the rotating mechanism is connected with the material crushing mechanism. According to the secondary aluminum smelting device, waste aluminum can be pretreated, smashed, screened and then smelted, it is guaranteed that when the waste aluminum is smelted, the block size is uniform and consistent, the pushing amount can be increased, rapid smelting of the waste aluminum is guaranteed, the secondary aluminum smelting efficiency is improved, and the secondary aluminum smelting cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of secondary aluminum smelting, and in particular to a secondary aluminum smelting device. Background Art

[0002] Recycled aluminum is an aluminum alloy or aluminum metal obtained by remelting and refining scrap aluminum and aluminum alloy materials or aluminum-containing waste. It is an important source of aluminum. Recycled aluminum has the same properties as original aluminum. It can be remelted, refined and purified with recycled aluminum ingots, and various cast aluminum alloys and deformed aluminum alloys can be made by adjusting the chemical composition, and then processed into aluminum castings or plastic processed aluminum materials. However, the existing recycled aluminum smelting equipment still has certain defects, such as:

[0003] The "A Recycled Aluminum Smelting Device" with application number CN201820203712.7 is unable to pre-process the scrap aluminum by crushing and screening during use. The scrap aluminum is directly fed into the furnace. Since the scrap aluminum blocks vary in size, larger scrap aluminum will take more time to smelt and occupy a larger space, affecting the amount of scrap aluminum fed, which is not conducive to improving the efficiency of recycled aluminum smelting, increases the cost of recycled aluminum smelting, and has limitations in use. Summary of the invention

[0004] The object of the present invention is to provide a secondary aluminum smelting device to solve the problem mentioned in the above background technology that the existing secondary aluminum smelting device cannot perform crushing and screening pre-treatment on waste aluminum, thereby affecting the secondary aluminum smelting efficiency.

[0005] To achieve the above object, the present invention provides the following technical solution: a regenerated aluminum smelting device, comprising a smelting furnace,

[0006] A processing box, wherein the processing box is fixedly mounted on the top surface of the smelting furnace, and the bottom of the processing box is connected to the top of the smelting furnace through a material through hole;

[0007] A feed hopper, the feed hopper is fixedly arranged through the top of the processing box;

[0008] A discharge pipe, the discharge pipe is fixedly arranged through the lower end of the left side wall of the smelting furnace, and a valve is installed on the discharge pipe;

[0009] A shell, the shell being fixedly mounted on the right side of the smelting furnace and the processing box;

[0010] A crushing mechanism, wherein the crushing mechanism is arranged on the processing box;

[0011] A rotating mechanism connected to the crushing mechanism;

[0012] A screening mechanism connected to the rotating mechanism;

[0013] A stirring mechanism, wherein the stirring mechanism is connected to the crushing mechanism;

[0014] A material return mechanism is connected to the stirring mechanism.

[0015] The above technical solution is adopted to facilitate the smelting of scrap aluminum after crushing and screening.

[0016] As a preferred technical solution of the present invention, the crushing mechanism comprises:

[0017] A driving motor, the driving motor is fixedly mounted on the right inner wall surface of the shell;

[0018] A rotating shaft, the right end of which is keyed to the shaft end of the driving motor, and the bearing of the rotating shaft is arranged to penetrate the right side wall of the processing box, and the left end of the rotating shaft is connected to the bearing of the left inner wall of the processing box;

[0019] A first crushing roller, wherein the first crushing roller is fixedly sleeved on the rotating shaft and is located inside the processing box;

[0020] A rotating rod, the left end of which is connected to a bearing on the left inner wall of the processing box, and the rotating rod bearing is arranged to penetrate the right side wall of the processing box, and the rotating rod is located in front of the rotating shaft;

[0021] A driving gear, the driving gear is fixedly sleeved on the rotating shaft and is located in the housing;

[0022] A driven gear, the driven gear is fixedly mounted on the right end of the rotating rod, and the driven gear is meshed and connected with the driving gear;

[0023] The second crushing roller is fixedly sleeved on the rotating rod, and the second crushing roller is located inside the processing box, and the second crushing roller is matched with the first crushing roller.

[0024] By adopting the above technical solution, when the rotating shaft drives the first pulverizing roller to rotate, the rotating rod drives the second pulverizing roller to rotate through the arrangement of the driving gear and the driven gear, thereby achieving pulverization of waste aluminum.

[0025] As a preferred technical solution of the present invention, the gear ratio between the driving gear and the driven gear is 1:1.

[0026] The above technical solution is adopted to facilitate the driving gear and the driven gear to rotate at the same speed, thereby ensuring that the first crushing roller and the second crushing roller rotate at the same speed.

[0027] As a preferred technical solution of the present invention, the rotating mechanism comprises:

[0028] A fixing plate, the fixing plate is fixedly mounted on the right side of the processing box, and the fixing plate is located inside the shell;

[0029] A transmission rod, wherein a longitudinal bearing of the transmission rod is arranged to penetrate the fixing plate;

[0030] A first bevel gear set, wherein the first bevel gear set is mounted on the rotating shaft and is fixedly connected to the top end of the transmission rod;

[0031] A turntable, the turntable is fixedly mounted on the bottom end of the transmission rod;

[0032] A driving pin is fixedly mounted on the bottom surface of the turntable.

[0033] By adopting the above technical solution, when the rotating shaft rotates, the transmission rod, the rotating disk and the driving pin are driven to rotate through the first bevel gear set.

[0034] As a preferred technical solution of the present invention, the longitudinal centerline of the turntable is colinear with the longitudinal centerline of the transmission rod, and the driving pin is located at an eccentric position on the bottom surface of the turntable.

[0035] The adoption of the technical solution facilitates the guarantee of circular rotation of the driving pin.

[0036] As a preferred technical solution of the present invention, the screening mechanism comprises:

[0037] A sliding rod, the sliding rod slidingly penetrates the right side wall of the processing box;

[0038] A connecting plate, the connecting plate is fixedly mounted on the right end of the sliding rod;

[0039] A driving groove, the driving groove is formed on the top surface of the connecting plate, and the driving groove is consistent with the driving pin;

[0040] The sieve plate is fixedly mounted on the left end of the sliding rod, and the sieve plate is tilted with the left side lower and the right side higher.

[0041] By adopting the above technical solution, when the driving pin rotates in a circle, the connecting plate can cooperate with the driving groove to drive the sliding rod and the sieve plate to move back and forth, thereby screening the crushed waste aluminum.

[0042] As a preferred technical solution of the present invention, a material guide plate is provided above the sieve plate, and the material guide plate is fixedly installed on the inner wall surface of the processing box, and the material guide plate is located below the first crushing roller and the second crushing roller, and the material outlet of the material guide plate is located at the right end above the sieve plate.

[0043] The above technical solution is adopted to ensure that the crushed scrap aluminum effectively falls to the right side of the top surface of the sieve plate.

[0044] As a preferred technical solution of the present invention, the stirring mechanism comprises:

[0045] A shaft, wherein the shaft bearings are successively arranged to penetrate the left and right side walls of the smelting furnace;

[0046] A driving pulley, the driving pulley is fixedly sleeved on the rotating shaft;

[0047] A driven pulley, the driven pulley is fixedly mounted on the right end of the shaft, and the driven pulley is connected to the driving pulley through a belt transmission;

[0048] A stirring rod is evenly mounted on the shaft and is located in the smelting furnace.

[0049] By adopting the above technical solution, when the rotating shaft rotates, the shaft rod drives the stirring rod to rotate through the setting of the driving pulley, the belt and the driven pulley, so as to stir the molten scrap aluminum, ensure that the scrap aluminum is heated evenly and improve the smelting efficiency.

[0050] As a preferred technical solution of the present invention, the material return mechanism comprises:

[0051] A protective cover, wherein the protective cover is fixedly mounted on the left side of the smelting furnace, and the left end of the shaft is located in the protective cover;

[0052] A rotating round rod, wherein the rotating round rod bearing is arranged through the top of the protective cover;

[0053] A second bevel gear set, wherein the second bevel gear set is fixedly mounted on the bottom end of the rotating round rod, and the second bevel gear set is fixedly connected to the left end of the shaft rod;

[0054] A feeding cylinder, the feeding cylinder is fixedly mounted on the left side of the processing box, and the rotating round rod bearing is arranged through the bottom of the feeding cylinder, and the top end of the rotating round rod is connected to the inner top surface bearing of the feeding cylinder;

[0055] A spiral feed plate, which is fixedly mounted on the rotating round rod and is located inside the feed cylinder;

[0056] A channel, wherein the channel is fixedly arranged to penetrate the left side wall of the processing box, and the channel is fixedly connected to the lower end of the right side wall of the feeding cylinder, and the feed end of the channel is located below the left end surface of the sieve plate;

[0057] A return pipe, the left end of which is fixedly connected to the upper end of the right side wall of the feed cylinder, and the right end of which is fixedly connected to the left side wall of the feed hopper, and the return pipe is tilted with the left side higher and the right side lower.

[0058] By adopting the above technical solution, when the shaft rotates, the second bevel gear set can drive the rotating round rod and the spiral feed plate to rotate synchronously, thereby ensuring that the large pieces of scrap aluminum screened out are transported back upward for secondary crushing.

[0059] Compared with the prior art, the invention has the following beneficial effects: the recycled aluminum smelting device can pre-treat the waste aluminum, crush and screen the waste aluminum before smelting, ensure that the block size of the waste aluminum is uniform during smelting, increase the pushing amount and ensure rapid smelting of the waste aluminum, improve the efficiency of recycled aluminum smelting, and reduce the cost of recycled aluminum smelting;

[0060] 1. The driving motor is started to make the rotating shaft drive the first crushing roller to rotate, and the driving gear and the driven gear are meshed and rotated to make the rotating rod drive the second crushing roller to rotate, so that the input waste aluminum is crushed by the cooperation of the first crushing roller and the second crushing roller;

[0061] 2. The crushed scrap aluminum will fall onto the sieve plate through the guide plate. When the rotating shaft rotates, the transmission rod drives the turntable to rotate through the first bevel gear set, so that the turntable drives the driving pin to rotate in a circle, and the sliding rod drives the sieve plate to reciprocate under the cooperation of the driving pin and the driving groove, so as to screen the crushed scrap aluminum. The scrap aluminum with uniform blocks will enter the smelting furnace through the feeding hole, so as to improve the feeding amount and smelting efficiency;

[0062] 3. When the rotating shaft rotates, the shaft drives the stirring rod to rotate through the action of the driving pulley, belt and driven pulley, so that the stirring rod stirs the molten scrap aluminum, thereby ensuring that the scrap aluminum is heated evenly and improving the smelting efficiency of recycled aluminum;

[0063] 4. During screening, large pieces of scrap aluminum will enter the feed tube through the channel, and when the shaft rotates, the second bevel gear set will drive the spiral feed plate to rotate, so that the large pieces of scrap aluminum can be transported upward and re-entered into the processing box through the return pipe for re-crushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0065] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0066] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0067] Figure 4 It is a schematic diagram of the top cross-sectional connection structure of the first crushing roller and the second crushing roller of the present invention;

[0068] Figure 5 It is a schematic diagram of the connection structure of the transmission rod, the first bevel gear set and the right side of the rotating disk of the present invention;

[0069] Figure 6 It is a schematic diagram of the three-dimensional connection structure of the turntable, the driving pin and the driving slot of the present invention;

[0070] Figure 7 It is a schematic diagram of the top cross-sectional connection structure of the sliding rod and the sieve plate of the present invention;

[0071] Figure 8 It is a schematic diagram of the left side cross-sectional connection structure between the processing box and the guide plate of the present invention;

[0072] Fig. 9 It is a schematic diagram of the connection structure of the driving pulley, the belt and the driven pulley from the right side of the present invention;

[0073] Fig.10 It is a schematic diagram of the three-dimensional connection structure between the shaft rod and the stirring rod of the present invention.

[0074] In the figure: 1, smelting furnace; 2, processing box; 3, material hole; 4, feed hopper; 5, discharge pipe; 6, shell; 7, drive motor; 8, rotating shaft; 9, first crushing roller; 10, rotating rod; 11, driving gear; 12, driven gear; 13, second crushing roller; 14, fixed plate; 15, transmission rod; 16, first bevel gear set; 17, turntable; 18, driving pin; 19, sliding rod; 20, connecting plate; 21, driving groove; 22, sieve plate; 23, guide plate; 24, shaft; 25, driving pulley; 26, driven pulley; 27, belt; 28, stirring rod; 29, protective cover; 30, rotating round rod; 31, second bevel gear set; 32, feeding barrel; 33, spiral feeding plate; 34, channel; 35, return pipe. DETAILED DESCRIPTION

[0075] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0076] See also Figure 1-10, the technical solution of the present invention: a secondary aluminum smelting device, comprising a smelting furnace 1, a processing box 2 is fixedly installed on the top surface of the smelting furnace 1, and the bottom of the processing box 2 is connected with the top of the smelting furnace 1 through a material hole 3, a feed hopper 4 is fixedly set through the top of the processing box 2, a discharge pipe 5 is fixedly set through the lower end of the left side wall of the smelting furnace 1, and a valve is installed on the discharge pipe 5, and a shell 6 is fixedly installed on the right side of the smelting furnace 1 and the processing box 2;

[0077] The driving motor 7 is fixedly mounted on the right inner wall of the housing 6, the right end of the rotating shaft 8 is keyed to the shaft end of the driving motor 7, and the bearing of the rotating shaft 8 runs through the right wall of the processing box 2, and the left end of the rotating shaft 8 is connected to the bearing of the left inner wall of the processing box 2, the first crushing roller 9 is fixedly sleeved on the rotating shaft 8, and the first crushing roller 9 is located inside the processing box 2, the left end of the rotating rod 10 is connected to the bearing of the left inner wall of the processing box 2, and the bearing of the rotating rod 10 runs through the right wall of the processing box 2. , and the rotating rod 10 is located in front of the rotating shaft 8, the driving gear 11 is fixedly sleeved on the rotating shaft 8, and the driving gear 11 is located in the housing 6, the driven gear 12 is fixedly installed on the right end of the rotating rod 10, and the driven gear 12 is meshed and connected with the driving gear 11, the second crushing roller 13 is fixedly sleeved on the rotating rod 10, and the second crushing roller 13 is located inside the processing box 2, and the second crushing roller 13 is adapted to the first crushing roller 9, and the gear ratio of the driving gear 11 to the driven gear 12 is 1:1;

[0078] The fixing plate 14 is fixedly mounted on the right side of the processing box 2, and the fixing plate 14 is located in the housing 6. The longitudinal bearing of the transmission rod 15 runs through the fixing plate 14. The first bevel gear set 16 is mounted on the rotating shaft 8, and the first bevel gear set 16 is fixedly connected to the top of the transmission rod 15. The turntable 17 is fixedly mounted on the bottom end of the transmission rod 15. The driving pin 18 is fixedly mounted on the bottom surface of the turntable 17. The longitudinal axis centerline of the turntable 17 is colinear with the longitudinal axis centerline of the transmission rod 15, and the driving pin 18 is located at an eccentric position on the bottom surface of the turntable 17.

[0079] The sliding rod 19 slides through the right side wall of the processing box 2, the connecting plate 20 is fixedly installed on the right end of the sliding rod 19, the driving groove 21 is opened on the top surface of the connecting plate 20, and the driving groove 21 is consistent with the driving pin 18, and the sieve plate 22 is fixedly installed on the left end of the sliding rod 19, and the sieve plate 22 is tilted with the left lower and the right higher;

[0080] A material guide plate 23 is provided above the sieve plate 22, and the material guide plate 23 is fixedly mounted on the inner wall surface of the processing box 2, and the material guide plate 23 is located below the first crushing roller 9 and the second crushing roller 13, and the material outlet of the material guide plate 23 is located at the right end above the sieve plate 22;

[0081] The shaft 24 is provided with bearings that penetrate the left and right side walls of the smelting furnace 1 in sequence, the driving pulley 25 is fixedly sleeved on the rotating shaft 8, the driven pulley 26 is fixedly installed on the right end of the shaft 24, and the driven pulley 26 is connected to the driving pulley 25 through a belt 27, and the stirring rod 28 is evenly installed on the shaft 24, and the stirring rod 28 is located in the smelting furnace 1;

[0082] The protective cover 29 is fixedly installed on the left side of the smelting furnace 1, and the left end of the shaft 24 is located in the protective cover 29, the rotating rod 30 bearing is set through the top of the protective cover 29, the second bevel gear set 31 is fixedly installed on the bottom end of the rotating rod 30, and the second bevel gear set 31 is fixedly connected to the left end of the shaft 24, the feed cylinder 32 is fixedly installed on the left side of the processing box 2, and the rotating rod 30 bearing is set through the bottom of the feed cylinder 32, and the top of the rotating rod 30 is connected to the inner top surface bearing of the feed cylinder 32. Then, the spiral conveying plate 33 is fixedly installed on the rotating round rod 30, and the spiral conveying plate 33 is located inside the conveying barrel 32, the channel 34 is fixedly set to penetrate the left side wall of the processing box 2, and the channel 34 is fixedly connected to the lower end of the right side wall of the conveying barrel 32, and the feeding end of the channel 34 is located below the left end surface of the sieve plate 22, the left end of the return pipe 35 is fixedly connected to the upper end of the right side wall of the conveying barrel 32, and the right end of the return pipe 35 is fixedly connected to the left side wall of the feed hopper 4, and the return pipe 35 is inclined with the left side higher and the right side lower.

[0083] Working principle: When in use, waste aluminum is put into the processing box 2 through the feed hopper 4, and the driving motor 7 is started to rotate the rotating shaft 8, so that the rotating shaft 8 drives the first crushing roller 9 and the driving gear 11 to rotate, so that the driven gear 12 meshing with the driving gear 11 drives the rotating rod 10 and the second crushing roller 13 to rotate, and then the waste aluminum is crushed by the action of the first crushing roller 9 and the second crushing roller 13;

[0084] The crushed scrap aluminum will fall down onto the guide plate 23 and slide onto the sieve plate 22. At the same time, when the rotating shaft 8 rotates, the transmission rod 15 is driven to rotate through the first bevel gear set 16, so that the transmission rod 15 drives the turntable 17 to rotate synchronously, so that the turntable 17 drives the driving pin 18 to produce a circular rotation, and then the connecting plate 20 drives the sliding rod 19 and the sieve plate 22 to reciprocate under the cooperation of the driving pin 18 and the driving groove 21, so as to realize the screening of the crushed scrap aluminum. After screening, the scrap aluminum with uniform block size will enter the smelting furnace 1 through the material through hole 3 for smelting;

[0085] When the rotating shaft 8 rotates, the driving pulley 25 is driven to rotate synchronously, and the driven pulley 26 drives the shaft 24 and the stirring rod 28 to rotate synchronously through the action of the belt 27, so that the stirring rod 28 stirs the molten scrap aluminum to ensure that the scrap aluminum is heated evenly and improve the smelting efficiency;

[0086] When the shaft 24 rotates, the second bevel gear set 31 drives the rotating rod 30 to rotate, so that the rotating rod 30 drives the spiral feed plate 33 to rotate synchronously, thereby conveying the large pieces of scrap aluminum that have not been screened out and pass through the channel 34 and then into the feed cylinder 32 upward, and then the large pieces of scrap aluminum pass through the return pipe 35 and the feed hopper 4 to enter the processing box 2 for further crushing;

[0087] After the scrap aluminum is smelted, the aluminum liquid is discharged through the discharge pipe 5 to achieve the smelting of recycled aluminum. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0088] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A secondary aluminum smelting device, comprising a smelting furnace (1), characterized in that: Also includes: A processing box (2), the processing box (2) is fixedly mounted on the top surface of the smelting furnace (1), and the bottom of the processing box (2) is connected to the top of the smelting furnace (1) through a material through hole (3); A feed hopper (4), the feed hopper (4) being fixedly arranged through the top of the processing box (2); A discharge pipe (5), the discharge pipe (5) is fixedly arranged to pass through the lower end of the left side wall of the smelting furnace (1), and a valve is installed on the discharge pipe (5); A shell (6), wherein the shell (6) is fixedly mounted on the right side of the smelting furnace (1) and the processing box (2); A material crushing mechanism, the material crushing mechanism being arranged on the processing box (2); A rotating mechanism connected to the crushing mechanism; A screening mechanism connected to the rotating mechanism; A stirring mechanism, wherein the stirring mechanism is connected to the crushing mechanism; A material return mechanism is connected to the stirring mechanism.

2. A secondary aluminum smelting device according to claim 1, characterized in that: The crushing mechanism comprises: A drive motor (7), wherein the drive motor (7) is fixedly mounted on the right inner wall surface of the housing (6); A rotating shaft (8), the right end of the rotating shaft (8) is key-connected to the shaft end of the driving motor (7), and the bearing of the rotating shaft (8) is arranged to penetrate the right side wall of the processing box (2), and the left end of the rotating shaft (8) is bearing-connected to the left inner wall surface of the processing box (2); a first crushing roller (9), the first crushing roller (9) being fixedly sleeved on the rotating shaft (8), and the first crushing roller (9) being located inside the processing box (2); A rotating rod (10), the left end of which is connected to a bearing on the left inner wall of the processing box (2), and the bearing of the rotating rod (10) is arranged to penetrate the right wall of the processing box (2), and the rotating rod (10) is located in front of the rotating shaft (8); A driving gear (11), the driving gear (11) being fixedly sleeved on the rotating shaft (8), and the driving gear (11) being located inside the housing (6); A driven gear (12), the driven gear (12) being fixedly mounted on the right end of the rotating rod (10), and the driven gear (12) being meshedly connected with the driving gear (11); A second crushing roller (13), the second crushing roller (13) is fixedly mounted on the rotating rod (10), and the second crushing roller (13) is located inside the processing box (2), and the second crushing roller (13) is adapted to the first crushing roller (9).

3. A secondary aluminum smelting device according to claim 2, characterized in that: The gear ratio between the driving gear (11) and the driven gear (12) is 1:

1.

4. A secondary aluminum smelting device according to claim 2, characterized in that: The rotating mechanism comprises: A fixing plate (14), the fixing plate (14) being fixedly mounted on the right side of the processing box (2), and the fixing plate (14) being located inside the shell (6); A transmission rod (15), wherein a longitudinal bearing of the transmission rod (15) is disposed through the fixing plate (14); A first bevel gear set (16), the first bevel gear set (16) being mounted on the rotating shaft (8), and the first bevel gear set (16) being fixedly connected to the top end of the transmission rod (15); A rotating disk (17), wherein the rotating disk (17) is fixedly mounted on the bottom end of the transmission rod (15); A driving pin (18), wherein the driving pin (18) is fixedly mounted on the bottom surface of the rotating disk (17).

5. A secondary aluminum smelting device according to claim 4, characterized in that: The longitudinal centerline of the rotating disk (17) is colinear with the longitudinal centerline of the transmission rod (15), and the driving pin (18) is located at an eccentric position on the bottom surface of the rotating disk (17).

6. A secondary aluminum smelting device according to claim 4, characterized in that: The screening mechanism comprises: A sliding rod (19), the sliding rod (19) being slidably arranged to penetrate the right side wall of the processing box (2); A connecting plate (20), wherein the connecting plate (20) is fixedly mounted on the right end of the sliding rod (19); A driving groove (21), wherein the driving groove (21) is formed on the top surface of the connecting plate (20), and the driving groove (21) is matched with the driving pin (18); A sieve plate (22) is fixedly mounted on the left end of the sliding rod (19), and the sieve plate (22) is tilted so that it is lower on the left and higher on the right.

7. A secondary aluminum smelting device according to claim 6, characterized in that: A material guide plate (23) is provided above the sieve plate (22), and the material guide plate (23) is fixedly mounted on the inner wall surface of the processing box (2), and the material guide plate (23) is located below the first crushing roller (9) and the second crushing roller (13), and the discharge port of the material guide plate (23) is located at the right end above the sieve plate (22).

8. A secondary aluminum smelting device according to claim 6, characterized in that: The stirring mechanism comprises: A shaft (24), wherein the shaft (24) is disposed so as to extend through the left and right side walls of the smelting furnace (1); A driving pulley (25), wherein the driving pulley (25) is fixedly sleeved on the rotating shaft (8); A driven pulley (26), the driven pulley (26) is fixedly mounted on the right end of the shaft (24), and the driven pulley (26) is connected to the driving pulley (25) via a belt (27); A stirring rod (28), wherein the stirring rod (28) is evenly mounted on the shaft (24), and the stirring rod (28) is located in the smelting furnace (1).

9. A secondary aluminum smelting device according to claim 8, characterized in that: The material return mechanism comprises: A protective cover (29), wherein the protective cover (29) is fixedly mounted on the left side of the smelting furnace (1), and the left end of the shaft (24) is located inside the protective cover (29); A rotating round rod (30), wherein a bearing of the rotating round rod (30) is arranged to penetrate the top of the protective cover (29); A second bevel gear set (31), the second bevel gear set (31) is fixedly mounted on the bottom end of the rotating round rod (30), and the second bevel gear set (31) is fixedly connected to the left end of the shaft rod (24); A feeding cylinder (32), the feeding cylinder (32) is fixedly mounted on the left side of the processing box (2), and the bearing of the rotating round rod (30) is arranged to pass through the bottom of the feeding cylinder (32), and the top end of the rotating round rod (30) is connected to the inner top surface bearing of the feeding cylinder (32); A spiral material conveying plate (33), wherein the spiral material conveying plate (33) is fixedly mounted on the rotating round rod (30), and the spiral material conveying plate (33) is located inside the material conveying cylinder (32); A channel (34), the channel (34) is fixedly arranged to penetrate the left side wall of the processing box (2), and the channel (34) is fixedly connected to the lower end of the right side wall of the feeding cylinder (32), and the feed end of the channel (34) is located below the left end surface of the sieve plate (22); A return pipe (35), the left end of which is fixedly connected to the upper end of the right side wall of the feed cylinder (32), and the right end of which is fixedly connected to the left side wall of the feed hopper (4), and the return pipe (35) is inclined so that it is higher on the left and lower on the right.

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