Aluminum alloy smelting and standing equipment

Abstract

The utility model relates to the technical field of aluminum alloy production, in particular to aluminum alloy smelting and standing equipment, aims to solve the technical problem of overcoming the defects of smelting and standing in the prior art, and is mainly realized through the following technical scheme: the aluminum alloy smelting and standing equipment comprises an outer cover body, a smelting furnace and a standing furnace, the outer cover body is provided with two partition plates corresponding to the position between the smelting furnace and the standing furnace, the smelting furnace and the standing furnace are connected through a residue filtering device, the residue filtering device comprises a liquid passing groove and a conveying pipe, a filtering assembly is further arranged on the liquid passing groove, and a flue gas treatment device is arranged at the top of the smelting furnace and comprises an adsorption box, an exhaust pipe and a treatment box. A filtering disc is arranged in the standing furnace, a residue filtering device is additionally arranged in the two furnace bodies, the influence of impurities on follow-up standing is reduced, the follow-up finished product quality is improved through two-time filtering of a filtering assembly and the filtering disc, waste gas waste heat is used for heat preservation in the transferring process, waste gas and the like are treated, and environmental pollution is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aluminium alloy production, and particularly relates to an aluminium alloy smelting and standing device. BACKGROUND

[0002] The standing furnace is an indispensable part in aluminium smelting and processing, and is used for receiving alloy melt smelted in a smelting furnace, refining, standing and adjusting melt temperature in the standing furnace, and plays a heat preservation role on the melt in the casting process.

[0003] In the prior art, the aluminium melt in the smelting furnace needs to be poured into the standing furnace for standing, the standing furnace is arranged separately from the smelting furnace, the smelting furnace has many impurities, and the aluminium melt cannot be heat preserved during the transfer process, which affects the subsequent standing; the aluminium melt needs to be continuously heat preserved during the standing process, and the generated waste gas dust needs to be exhausted and purified to avoid excessive temperature fluctuation of the standing furnace and environmental pollution caused by gas exhaust. UTILITY MODEL CONTENT

[0004] Therefore, the utility model solves the technical problem of overcoming the defects of smelting and standing in the prior art, and provides an aluminium alloy smelting and standing device.

[0005] The above technical purpose of the utility model is achieved by the following technical scheme:

[0006] The aluminium alloy smelting and standing device comprises an outer cover body, a smelting furnace and a standing furnace, the smelting furnace and the standing furnace are both arranged in the outer cover body, two partition plates are arranged between the smelting furnace and the standing furnace in the outer cover body, the smelting furnace and the standing furnace are connected through a residue filtering device, the residue filtering device comprises a liquid passing groove and a conveying pipe, an isolation chamber is further arranged in the outer cover body and corresponds to the residue filtering device, the isolation chamber is arranged between the two partition plates, electric heating devices are arranged on the outer walls of the smelting furnace and the standing furnace, an opening cover is arranged on the top of the outer cover body and corresponds to the standing furnace, and the opening cover is hingedly arranged on the outer cover body and is away from the smelting furnace.

[0007] By adopting the above technical scheme, the aluminium material is first melted in the smelting furnace, then enters the standing furnace through the residue filtering device for standing and adjusting the melt temperature, the outer cover body heat preserves the residue filtering device during the transfer process, the aluminium melt is filtered through the liquid passing groove to leave the impurities in the liquid passing groove, the filtered aluminium melt enters the standing furnace, inert gas is introduced into the standing furnace to protect the standing, and thus a high-quality finished product is obtained, the overall operation process is convenient, the structure is simple, and manual participation is reduced to reduce safety hazards.

[0008] Further, the smelting furnace top extends with a feeding pipe away from one side of the static furnace, the feeding pipe extends out of the outer cover, the smelting furnace bottom extends with a discharging pipe close to one side of the static furnace, the discharging pipe communicates with the liquid passing groove, the smelting furnace inner bottom is further provided with a stirring device, the stirring device comprises a stirring shaft, a plurality of stirring rods and a stirring driving part, the stirring shaft is vertically arranged at the center of the smelting furnace, the stirring rods are circumferentially arranged on the stirring shaft and axially arranged along the stirring shaft, and the stirring driving part is arranged below the stirring shaft and drives the stirring shaft to rotate.

[0009] By adopting the above technical scheme, the aluminum melt is fed into the smelting furnace through the feeding pipe, and is continuously stirred by the stirring device during the smelting process to ensure complete melting, and the smelted aluminum melt is discharged from the discharging pipe and fed into the subsequent static furnace.

[0010] Further, the smelting furnace top is further provided with a flue gas treatment device, the flue gas treatment device comprises an adsorption box, an exhaust pipe and a treatment box, the adsorption box is installed on the top of the smelting furnace and the exhaust pipe passes through the adsorption box, one end of the exhaust pipe communicates with the top of the smelting furnace and the other end enters the treatment box, and the treatment box is arranged outside the outer cover.

[0011] By adopting the above technical scheme, the exhaust gas generated during the operation of the smelting furnace enters the adsorption box in sequence from the exhaust pipe for adsorption treatment, realizing the purification of the exhaust gas, and the clean exhaust gas is discharged from the exhaust pipe, sent into the treatment box for further treatment and then discharged, avoiding environmental pollution and being environmentally friendly and reliable.

[0012] Further, the exhaust pipe further passes through the bottom of the isolation chamber, and a section of the exhaust pipe below the isolation chamber is in a serpentine shape; the isolation chamber is provided with a liquid passing groove, the liquid passing groove communicates with the static furnace through a conveying pipe, and the conveying pipe is further provided with a suction pump.

[0013] By adopting the above technical scheme, the exhaust pipe passing through the bottom of the isolation chamber continuously heats and keeps warm for the isolation chamber, avoiding the influence of overcooling on the quality of the aluminum melt during the transfer process; and the suction pump lifts the aluminum melt and conveys it from a high place to the static furnace.

[0014] Further, the liquid passing groove is further provided with a filter assembly, the filter assembly comprises a filter screen, a sliding driving part and two connecting rods, the connecting rods are L-shaped and connected with both sides of the filter screen, the sliding driving part controls the movement of the connecting rods and drives the filter screen to slide along the length direction of the liquid passing groove, the filter screen is in a cylindrical shape and a plurality of primary filter holes are formed in the outer periphery of the filter screen, the filter screen is arranged along the length direction of the liquid passing groove and the outer diameter of the filter screen is equal to the inner diameter of the conveying pipe.

[0015] By adopting the technical scheme, the filtering screen is in a cylindrical shape and is clamped in the conveying pipe to filter the aluminum melt, and after subsequent conveying is completed, the filtering screen is controlled to be separated from the conveying pipe by the sliding driving element, so that the filtering screen is conveniently taken out and cleaned, and impurities and residues are avoided from being sent into the holding furnace, the filtering screen can be made of high-temperature-resistant materials such as glass fiber or ceramic fiber, and the filtering screen is avoided from being damaged by the high-temperature aluminum melt.

[0016] Further, one end of the conveying pipe is connected with the liquid passing tank, and the other end is connected with the side wall of the holding furnace close to the top, a filtering disc is further arranged in the holding furnace, the filtering disc is arranged in close contact with the inner wall of the holding furnace, a plurality of secondary filtering holes are arranged on the filtering disc, a dispersion column vertically extending along the axis is further arranged vertically upward in the center of the filtering disc, a dispersion disc with a larger diameter than the dispersion column is arranged on the top of the dispersion column, and a diffusion plate extends from the end of the conveying pipe close to the dispersion disc and is arranged above the dispersion disc.

[0017] By adopting the technical scheme, the aluminum melt is conveyed from the conveying pipe, falls on the dispersion disc, and is subjected to secondary filtering through the filtering disc, the dispersion disc can reduce the height difference of the aluminum melt conveying and reduce the splashing of the aluminum melt, and the filtering disc further purifies the aluminum alloy liquid, thereby ensuring the quality of the finished product.

[0018] Further, the outer cover body is further provided with a heat preservation layer corresponding to the holding furnace, the heat preservation layer is in a U shape and is arranged with an opening facing the smelting furnace, the holding furnace comprises a processing furnace body and a mounting furnace cover, the processing furnace body is clamped with the mounting furnace cover, and the processing furnace body is provided with a ring-shaped positioning block extending on the top, and the mounting furnace cover is provided with a positioning groove corresponding to the positioning block and arranged on the bottom.

[0019] By adopting the technical scheme, when the aluminum melt is stationary in the holding furnace, the electric heating device generates heat to provide heat for the holding furnace, and the heat preservation layer avoids heat dissipation.

[0020] Further, the outer cover body is further provided with a ventilation device, the ventilation device is provided with a ventilation pipe extending and connected with the mounting furnace cover, a ventilation cavity is arranged in the mounting furnace cover, and a plurality of ventilation holes are further arranged on the ventilation cavity and penetrate the ventilation cavity to communicate with the inside of the processing furnace body.

[0021] By adopting the technical scheme, the processing furnace body and the mounting furnace cover realize the closed environment of the inside of the holding furnace, the ventilation device is arranged in the stationary process to introduce inert gas into the inside of the holding furnace for stationary protection, so that the aluminum melt achieves better stationary effect, and the ventilation cavity is arranged to avoid that the supercooled gas is directly introduced, the gas is preheated before being introduced, and the temperature of the melt on the surface of the holding furnace is avoided from being lost too quickly.

[0022] In summary, the technical scheme of the utility model has the following advantages:

[0023] 1. The aluminum alloy smelting and standing equipment, the outer cover body heat preservation smelting furnace and the standing furnace are arranged, heat loss is reduced, heat preservation effect is improved, smelting and standing quality are ensured, the quality and performance of aluminum melt processing aluminum alloy products are improved, and the yield is improved.

[0024] 2. The aluminum alloy smelting and standing equipment, the aluminum melt is filtered and purified twice and then enters the standing furnace for standing, impurities and residues are reduced, and the quality of aluminum products is improved.

[0025] 3. The aluminum alloy smelting and standing equipment, the processing furnace body and the installation furnace cover realize the closed environment of the standing furnace, the ventilation device is arranged in the standing process, the preheated inert gas is introduced into the standing furnace for standing protection, and the aluminum melt reaches better standing effect. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0027] Figure 1 The overall structure schematic diagram of the aluminum alloy smelting and standing equipment provided in one embodiment of the present application is shown in the figure.

[0028] Figure 2 The internal structure schematic diagram of the aluminum alloy smelting and standing equipment provided in one embodiment of the present application is shown in the figure.

[0029] Figure 3 The sectional view of the aluminum alloy smelting and standing equipment provided in one embodiment of the present application is shown in the figure.

[0030] Figure 4 The sectional structure schematic diagram of the standing furnace provided in one embodiment of the present application is shown in the figure.

[0031] Figure 5 The partial explosion structure schematic diagram of the residue filtering device provided in one embodiment of the present application is shown in the figure.

[0032] Explanation of reference signs:

[0033] 1, cover body; 11, partition plate; 12, isolation chamber; 13, opening cover; 14, heat preservation layer; 2, smelting furnace; 21, feeding pipe; 22, discharging pipe; 23, stirring device; 231, stirring shaft; 232, stirring rod; 233, stirring driving part; 3, standing furnace; 31, processing furnace body; 311, positioning block; 32, mounting furnace cover; 321, positioning groove; 322, ventilation cavity; 3221, ventilation hole; 33, filter disc; 331, secondary filter hole; 332, dispersion column; 333, dispersion disc; 4, residue filtering device; 41, liquid passing groove; 411, filter assembly; 4111, filter screen; 41111, primary filter hole; 4112, sliding driving part; 4113, connecting rod; 42, conveying pipe; 421, diffusion plate; 43, suction pump; 5, electric heating device; 6, flue gas treatment device; 61, adsorption box; 62, exhaust pipe; 63, treatment box; 7, ventilation device; 71, ventilation pipe. DETAILED DESCRIPTION

[0034] The utility model will be further explained in detail in connection with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and are not used to limit the utility model.

[0035] An aluminum alloy smelting and standing device, as shown in Figure 1 and Figure 2 , comprises a cover body 1, a smelting furnace 2 and a standing furnace 3, the smelting furnace 2 and the standing furnace 3 are both mounted in the cover body 1, and the smelting furnace 2 and the standing furnace 3 are both provided with an electric heating device 5. The cover body 1 is provided with two partition plates 11 corresponding to the smelting furnace 2 and the standing furnace 3, the smelting furnace 2 and the standing furnace 3 are connected through a residue filtering device 4, and the cover body 1 is further provided with an isolation chamber 12 corresponding to the residue filtering device 4, which is arranged between the two partition plates 11. The cover body 1 is provided with an opening cover 13 corresponding to the standing furnace 3 at the top, and the opening cover 13 is hingedly arranged away from the smelting furnace 2. The cover body 1 is further provided with a heat preservation layer 14 corresponding to the standing furnace 3, which is in a U shape and has an opening facing the smelting furnace 2. When the aluminum melt is standing in the standing furnace 3, the electric heating device 5 generates heat to provide heat for the standing furnace 3, and the heat preservation layer 14 prevents heat dissipation. The overall operation process is convenient, the structure is simple, and the manual participation is reduced to reduce the safety hidden danger.

[0036] As shown in Figure 2 and Figure 3 , the smelting furnace 2 is provided with a feeding pipe 21 extending away from the standing furnace 3 at the top, the feeding pipe 21 extends out of the cover body 1, and the smelting furnace 2 is provided with a discharging pipe 22 extending close to the standing furnace 3 at the bottom, the discharging pipe 22 is communicated with the liquid passing groove 41.

[0037] The bottom of the smelting furnace 2 is also provided with a stirring device 23, which comprises a stirring shaft 231, a plurality of stirring rods 232 and a stirring driving member 233. The stirring shaft 231 is vertically arranged at the center of the smelting furnace 2, the stirring rods 232 are circumferentially arranged on the stirring shaft 231 and axially arranged along the stirring shaft 231, and the stirring driving member 233 is arranged below the stirring shaft 231 and drives the stirring shaft 231 to rotate. The aluminum melt is fed into the smelting furnace 2 through the feeding pipe 21, and is continuously stirred by the stirring device 23 during the smelting process to ensure complete melting. The smelted aluminum melt is discharged from the discharging pipe 22 and fed into the subsequent static furnace 3.

[0038] As shown in Figure 2 and Figure 3 , the top of the smelting furnace 2 is also provided with a flue gas treatment device 6, which comprises an adsorption box 61, an exhaust pipe 62 and a treatment box 63. The adsorption box 61 is mounted on the top of the smelting furnace 2, and the exhaust pipe 62 passes through the adsorption box 61. One end of the exhaust pipe 62 is communicated with the top of the smelting furnace 2, and the other end is communicated into the treatment box 63. The treatment box 63 is arranged outside the outer cover 1. The exhaust gas generated during the operation of the smelting furnace 2 enters the adsorption box 61 in sequence from the exhaust pipe 62 for adsorption treatment, so as to purify the exhaust gas. The clean exhaust gas is discharged from the exhaust pipe 62, sent into the treatment box 63 for further treatment, and then discharged, so as to avoid environmental pollution and ensure environmental protection.

[0039] The exhaust pipe 62 also passes through the bottom of the isolation chamber 12, and a section of the exhaust pipe 62 located below the isolation chamber 12 is in a serpentine shape. The exhaust pipe 62 passing through the bottom of the isolation chamber 12 continuously heats and keeps warm the isolation chamber 12, so as to avoid the overcooling of the aluminum melt during the transfer process and affect the quality.

[0040] As shown in Figure 2 , Figure 3 and Figure 5 , the residue filtering device 4 comprises a liquid passing groove 41 and a conveying pipe 42. The liquid passing groove 41 is mounted in the isolation chamber 12, and the liquid passing groove 41 is communicated with the static furnace 3 through the conveying pipe 42. The conveying pipe 42 is also provided with a suction pump 43. The suction pump 43 lifts the aluminum melt from a high place and conveys it into the static furnace 3.

[0041] The filter assembly 411 is further arranged on the liquid passing groove 41, and comprises a filter screen 4111, a sliding drive 4112 and two connecting rods 4113. The connecting rods 4113 are L-shaped and connected to the two sides of the left end of the filter screen 4111. The left end of the filter screen 4111 extends a clamping frame which is fixed to one end of the bottom of the connecting rod 4113. The connecting rods 4113 are arranged opposite to each other on the two sides of the filter screen 4111. The sliding drive 4112 is arranged above the liquid passing groove 41 to control the movement of the connecting rod 4113 and drive the filter screen 4111 to slide along the length direction of the liquid passing groove 41. The filter screen 4111 is in a cylindrical shape and a plurality of primary filter holes 41111 are arranged on the outer periphery of the filter screen 4111. The filter screen 4111 is arranged along the length direction of the liquid passing groove 41 and the outer diameter of the filter screen 4111 is equal to the inner diameter of the conveying pipe 42. The filter screen 4111 is clamped in the conveying pipe 42 in a cylindrical shape to filter the aluminum melt conveyed. After the subsequent conveying is completed, the filter screen 4111 is controlled by the sliding drive 4112 to separate from the conveying pipe 42, so as to facilitate the removal and cleaning, and avoid the impurities and residues from being sent into the standing furnace 3. The filter screen 4111 can be made of high-temperature-resistant materials such as glass fiber or ceramic fiber to avoid being damaged by high-temperature aluminum melt.

[0042] As shown in Figure 3 and Figure 4 , one end of the conveying pipe 42 is connected with the liquid passing groove 41 and the other end is connected with the side wall of the standing furnace 3 near the top. The standing furnace 3 further comprises a filter disc 33 which is arranged in close contact with the inner wall of the standing furnace 3 and a plurality of secondary filter holes 331 are arranged on the filter disc 33. A dispersion column 332 which is vertically arranged at the center of the filter disc 33 vertically extends upwardly. A dispersion disc 333 which has a larger diameter than the dispersion column 332 is arranged on the top of the dispersion column 332. The conveying pipe 42 extends a diffusion plate 421 near one end of the dispersion disc 333 and the diffusion plate 421 is arranged above the dispersion disc 333. The aluminum melt is conveyed from the conveying pipe 42 and falls on the dispersion disc 333 and is subjected to secondary filtration through the filter disc 33. The dispersion disc 333 can reduce the height difference of the aluminum melt conveying and reduce the splashing of the aluminum melt. The filter disc 33 further purifies the aluminum alloy liquid to ensure the quality of the finished product.

[0043] As shown in Figure 3 and Figure 4 , the standing furnace 3 comprises a processing furnace body 31 and a mounting furnace cover 32. The processing furnace body 31 is clamped with the mounting furnace cover 32. The top of the processing furnace body 31 extends a ring-shaped positioning block 311. The bottom of the mounting furnace cover 32 is provided with a positioning groove 321 corresponding to the positioning block 311.

[0044] The outer cover 1 is further provided with a ventilation device 7, the ventilation device 7 extends a ventilation pipe 71 and is connected with the mounting furnace cover 32, the mounting furnace cover 32 is annularly provided with a ventilation cavity 322, and a plurality of ventilation holes 3221 are further formed in the ventilation cavity 322 and communicated with the inside of the processing furnace body 31. The processing furnace body 31 and the mounting furnace cover 32 realize the closed environment of the inside of the static furnace 3, the inert gas is introduced into the inside of the static furnace 3 by the ventilation device 7 during the static process, the static protection is realized, the aluminum melt reaches better static effect, the ventilation cavity 322 is arranged to avoid that the supercooled gas is directly introduced, the gas is preheated before being introduced, and the temperature of the melt on the surface of the static furnace 3 is prevented from being lost too fast.

[0045] The working principle and the use method of the aluminum alloy smelting and static equipment are as follows: the aluminum material is first sent into the smelting furnace 2 through the feeding pipe 21 and is melted, the stirring device 23 continuously stirs and shears during the melting, then the aluminum melt is conveyed into the static furnace 3 through the slag filtering device 4 and is subjected to static and melt temperature adjustment, in the transfer process, the isolation chamber 12 in the outer cover 1 is heat-insulated by the waste heat of the flue gas treatment, the aluminum melt passes through the liquid passing groove 41 and is filtered by the filtering assembly 411 to leave the impurities in the liquid passing groove 41, the filtered aluminum melt enters the static furnace 3, and the inert gas is introduced into the static furnace 3 through the ventilation device 7 to protect the static.

[0046] The above description shows and describes the preferred embodiments of the utility model, as described above, it should be understood that the utility model is not limited to the form disclosed in the present application, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed by the above teaching or related technology or knowledge within the scope of the utility model concept described in the present application. The changes and variations made by the person skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the protection scope of the claims attached to the utility model.

Claims

1. An aluminum alloy melting holding apparatus characterized by comprising: The utility model provides a smelting furnace, it includes outer cover (1), smelting furnace (2) and static furnace (3), smelting furnace (2) and static furnace (3) are installed in outer cover (1), and the outer cover (1) is provided with two partition plate (11) between smelting furnace (2) and static furnace (3), and smelting furnace (2) is connected with static furnace (3) through filter residue device (4), and filter residue device (4) includes liquid passing groove (41) and conveying pipe (42), and the outer cover (1) is also provided with isolation chamber (12) corresponding filter residue device (4), and isolation chamber (12) is arranged between two partition plate (11), and the outer wall of smelting furnace (2) and static furnace (3) is provided with electric heating device (5), and the top of outer cover (1) is provided with open cover (13) corresponding static furnace (3), and open cover (13) is hinged with outer cover (1) away from smelting furnace (2) side.

2. The aluminum alloy melting and holding apparatus of claim 1 wherein, The top of smelting furnace (2) extends into material pipe (21) away from static furnace (3) side, and material pipe (21) extends out of outer cover (1), and the bottom of smelting furnace (2) extends out material pipe (22) near static furnace (3) side, and material pipe (22) communicates with liquid passing groove (41), and the bottom of smelting furnace (2) is also provided with stirring device (23), and stirring device (23) includes stirring shaft (231), a plurality of stirring rod (232) and stirring drive part (233), and stirring shaft (231) is vertically arranged at the center of smelting furnace (2), and stirring rod (232) is circumferentially arranged on stirring shaft (231) and is axially arranged along stirring shaft (231), and stirring drive part (233) is arranged below stirring shaft (231) and drives stirring shaft (231) to rotate.

3. An aluminum alloy melting and holding apparatus according to claim 2, wherein The top of smelting furnace (2) is also provided with flue gas treatment device (6), and flue gas treatment device (6) includes adsorption box (61), exhaust pipe (62) and processing box (63), adsorption box (61) is installed on the top of smelting furnace (2), and exhaust pipe (62) passes through adsorption box (61), one end of exhaust pipe (62) communicates with the top of smelting furnace (2), and the other end leads into processing box (63), and processing box (63) is arranged outside outer cover (1).

4. The aluminum alloy melting and holding vessel of claim 3, wherein The bottom of isolation chamber (12) is also passed through exhaust pipe (62), and the section of exhaust pipe (62) below isolation chamber (12) is serpentine, and liquid passing groove (41) is installed in isolation chamber (12), and liquid passing groove (41) communicates with static furnace (3) through conveying pipe (42), and suction pump (43) is also arranged on conveying pipe (42).

5. An aluminum alloy melting and holding apparatus according to claim 4, wherein The filter assembly (411) is arranged on the liquid passing groove (41), and comprises a filter screen (4111), a sliding driving element (4112) and two connecting rods (4113). The connecting rods (4113) are L-shaped and connected to both sides of the filter screen (4111). The sliding driving element (4112) controls the movement of the connecting rods (4113) and drives the filter screen (4111) to slide along the length direction of the liquid passing groove (41). The filter screen (4111) is cylindrical and has a plurality of primary filtering holes (41111) formed in the outer periphery. The filter screen (4111) is arranged along the length direction of the liquid passing groove (41) and has an outer diameter equal to the inner diameter of the conveying pipe (42).

6. An aluminum alloy melting and holding apparatus according to claim 4, wherein One end of the conveying pipe (42) is connected to the liquid passing groove (41), and the other end is connected to the sidewall near the top of the static furnace (3). The static furnace (3) is further provided with a filter disc (33) arranged in close contact with the inner wall of the static furnace (3). A plurality of secondary filtering holes (331) are formed in the filter disc (33). The filter disc (33) is further provided with a dispersion column (332) vertically upwardly extending from the center of the filter disc (33). The dispersion column (332) has a dispersion disc (333) with a larger diameter than the dispersion column (332) arranged at the top of the dispersion column (332). The conveying pipe (42) is further provided with a diffusion plate (421) extending from the end near the dispersion disc (333), and the diffusion plate (421) is arranged above the dispersion disc (333).

7. An aluminum alloy melting and holding apparatus according to claim 6, wherein The outer cover (1) is further provided with a heat preservation layer (14) corresponding to the static furnace (3). The heat preservation layer (14) is U-shaped and has an opening facing the smelting furnace (2). The static furnace (3) comprises a processing furnace body (31) and a mounting furnace cover (32). The processing furnace body (31) is connected to the mounting furnace cover (32) in a clamping manner. The processing furnace body (31) is further provided with a ring-shaped positioning block (311) extending from the top. The mounting furnace cover (32) is further provided with a positioning groove (321) corresponding to the positioning block (311) formed in the bottom.

8. An aluminum alloy melting and holding apparatus according to claim 7, wherein The outer cover (1) is further provided with a ventilation device (7). The ventilation device (7) is further provided with a ventilation pipe (71) connected to the mounting furnace cover (32). The mounting furnace cover (32) is further provided with a ventilation cavity (322) arranged in a ring shape. A plurality of ventilation holes (3221) are formed in the ventilation cavity (322) and are in communication with the inside of the processing furnace body (31).

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