High-efficiency aluminum ingot melting furnace

Abstract

The application discloses a high-efficiency aluminum ingot melting furnace, and relates to the technical field of melting furnaces.The high-efficiency aluminum ingot melting furnace comprises a main melting furnace, a smelting cylinder is arranged in the main melting furnace, a feeding cylinder is fixedly installed at the top of the main melting furnace, a sealing assembly is arranged in the feeding cylinder, a heat preservation furnace is fixedly arranged at one side of the main melting furnace, the bottom of the heat preservation furnace is communicated with the bottom of the main melting furnace, a plurality of electric heating rods are arranged at the bottom of the heat preservation furnace, a discharging pipe is fixedly arranged in the heat preservation furnace, the lower end of the discharging pipe is arranged at the bottom of the heat preservation furnace, and the upper end of the discharging pipe extends to the outside of the heat preservation furnace, a pressurizing tank is further arranged, a piston is slidably arranged in the pressurizing tank, the pressurizing tank is communicated with the top of the heat preservation furnace through a connecting pipe, nitrogen gas can be injected into the furnace body through the pressurizing tank, the aluminum liquid can be extruded out of the furnace body by increasing the gas pressure in the furnace, and the external air can be effectively prevented from entering the furnace body during discharging, the feeding end of the main melting furnace can be blocked through the sealing assembly, the aluminum liquid can be kept in an inert gas environment at all times, and the oxidation reaction of the aluminum liquid is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of furnaces, in particular to an efficient aluminum ingot melting furnace. BACKGROUND

[0002] When aluminum products for vehicles are produced by using a die casting machine, preparation of aluminum liquid is a cornerstone link in the whole process. First, solid aluminum ingots need to be put into a special melting furnace for high-temperature melting. In the melting furnace, the aluminum ingots are heated to above their melting point and are converted into liquid aluminum with good fluidity. The liquid aluminum is refined by a refining device, and then is quantitatively transported to the vicinity of the die casting machine and is injected into the pressure chamber or the material pot of the die casting machine for high-pressure and high-speed filling. In the whole process, the melting furnace is responsible for the core task of converting solid aluminum into liquid aluminum, and also shoulders the heat preservation function of the aluminum liquid, and is an indispensable and crucial front-end core equipment in the aluminum product die casting production line.

[0003] As disclosed in the patent with the announcement number CN111618283B, an aluminum liquid melting furnace for casting includes a heat preservation furnace and a melting furnace, the melting furnace is installed in the heat preservation furnace, a spray head is arranged at the upper portion of the melting furnace, the spray head is connected with a gas conveying pipe, a plurality of nozzles are arranged on the spray head, an isolation cover is installed at the top end of the melting furnace, the spray head is located in the isolation cover, an installation groove is formed in the heat preservation furnace, the gas conveying pipe is located in the installation groove, one end of the gas conveying pipe is connected with the spray head and the other end of the gas conveying pipe penetrates out of the heat preservation furnace, the gas conveying pipe located in the installation groove is spirally arranged, the gas conveying pipe is a high-temperature-resistant metal pipe, the high-temperature-resistant metal pipe is integrally formed with a high-temperature-resistant metal cylinder, the high-temperature-resistant metal cylinder is located in the installation groove, and the gas conveying pipe is spirally arranged on the outer wall of the high-temperature-resistant metal cylinder, which can collect the aluminum liquid dropped on the surface of a ladle, so as to avoid waste of raw materials and environmental pollution caused by dropping on the ground.

[0004] However, when the existing melting furnace adds aluminum ingots and discharges aluminum liquid, external air is easy to enter the furnace body, the liquid aluminum is easy to be oxidized after being contacted with the air, the aluminum liquid dross is increased, and the material loss is caused. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a high-efficiency aluminum ingot melting furnace, comprising: a main melting furnace, a smelting cylinder is arranged inside the main melting furnace, a heating coil is fixedly arranged outside the smelting cylinder, a grate plate is also fixedly arranged inside the smelting cylinder, and a melting zone is arranged above the grate plate; a feeding cylinder is fixedly installed on the top of the main melting furnace, a feeding port is formed on one side above the feeding cylinder, and a sealing assembly is arranged inside the feeding cylinder; a heat preservation furnace is fixedly arranged on one side of the main melting furnace, the bottom of the heat preservation furnace is communicated with the bottom of the main melting furnace, the top of the heat preservation furnace is communicated with the top of the main melting furnace through an air pressure balance pipe, a plurality of electric heating rods are arranged on the bottom of the heat preservation furnace for providing heat when the aluminum liquid is heat preserved; a discharge pipe is fixedly arranged in the heat preservation furnace, the lower end of the discharge pipe is arranged on the bottom of the heat preservation furnace, and the upper end of the discharge pipe extends to the outside of the heat preservation furnace; further comprising a pressurizing tank, a piston is slidably arranged inside the pressurizing tank, an extension rod one for driving the piston to move is fixedly arranged on the top of the pressurizing tank, one side of the bottom of the pressurizing tank is communicated with the top of the heat preservation furnace through a connecting pipe, the other side of the bottom of the pressurizing tank is connected with a gas supply pipe, and a one-way valve one is arranged on the gas supply pipe; an explosion-proof valve is fixedly installed on the side wall of the pressurizing tank, the horizontal height of the explosion-proof valve is lower than the lower surface of the piston when the piston is located at the highest point, and when the piston moves downward to be lower than the explosion-proof valve, the gas below the piston in the pressurizing tank cannot be discharged through the explosion-proof valve.

[0006] Preferably, further comprising: an elevator and a crusher, the discharge end of the crusher is connected with the feeding end of the elevator, and the discharge end of the elevator is connected with the feeding cylinder above the sealing assembly.

[0007] Preferably, the sealing assembly comprises a sealing ring fixedly arranged on the inner wall of the feeding cylinder, a stepped groove is formed at the opening of the inner ring of the sealing ring; an extension rod two is fixedly arranged on the top of the feeding cylinder, the extension end of the extension rod two extends into the feeding cylinder; a sealing plate is fixedly arranged on the extension end of the extension rod two, the sealing plate is located below the sealing ring, and the edge of the sealing plate can be clamped into the stepped groove.

[0008] Preferably, an discharge nozzle is fixedly arranged above the outer surface of the heat preservation furnace away from the main melting furnace, the upper end of the discharge pipe is arranged in the discharge nozzle, and a cover plate for plugging the discharge nozzle is hinged to the discharge nozzle.

[0009] Preferably, a platform is fixedly arranged below the discharge nozzle on the outer surface of the heat preservation furnace, a lifting plate sliding in the vertical direction is arranged above the platform, a spring for pushing the lifting plate to reset upward is arranged in the platform; further comprising a connecting rod, the lower end of the connecting rod is hinged to the lifting plate, a pull rod is fixedly connected to one side of the cover plate, and the pull rod is hinged to the upper end of the connecting rod.

[0010] Preferably, the connecting pipe is branched into a cooling pipe and a heating pipe through two three-way pipes, and the cooling pipe and the heating pipe are respectively provided with two opposite one-way valves two and one-way valves three.

[0011] Preferably, the heating pipe is provided with a pipe heater outside, the cooling pipe is provided with a plurality of fins outside, and the cooling pipe is wrapped with a cooling cylinder outside the plurality of fins.

[0012] Preferably, the feeding cylinder is connected with an exhaust pipe at the top.

[0013] Beneficial effects

[0014] The application provides a high-efficiency aluminum ingot melting furnace, which has the following beneficial effects: nitrogen gas can be injected into the furnace body through the pressurizing tank, the aluminum liquid is extruded out of the furnace body by increasing the gas pressure in the furnace, so that the external air is effectively prevented from entering the furnace body during discharging, the feeding end of the main melting furnace is blocked by the sealing assembly, and the external air is prevented from entering the furnace body by injecting argon gas into the furnace body and discharging the argon gas outward during feeding, so that the aluminum liquid is always in an inert gas environment, the oxidation reaction of the aluminum liquid is reduced, the quality of the aluminum liquid is improved, and quality guarantee is provided for subsequent die casting; the main melting furnace and the holding furnace are arranged, and different heating devices can be used according to different heating requirements. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a perspective view of the application;

[0016] Fig. 2 It is a sectional view of the application;

[0017] Fig. 3 It is a sectional view of the pressurizing tank and the connecting pipe.

[0018] In the figure: 1, main melting furnace; 2, smelting cylinder; 3, heating coil; 4, grate plate; 5, feeding cylinder; 6, feeding port; 7, holding furnace; 8, gas pressure balance pipe; 9, electric heating rod; 10, discharging pipe; 11, pressurizing tank; 12, piston; 13, telescopic rod one; 14, connecting pipe; 15, gas supply pipe; 16, one-way valve one; 17, explosion-proof valve; 18, elevator; 19, crusher; 20, sealing ring; 21, stepped groove; 22, telescopic rod two; 23, sealing plate; 24, discharging nozzle; 25, cover plate; 26, platform; 27, lifting plate; 28, spring; 29, connecting rod; 30, three-way pipe; 31, cooling pipe; 32, heating pipe; 33, one-way valve two; 34, one-way valve three; 35, pipe heater; 36, fin; 37, cooling cylinder; 38, exhaust pipe; 39, gas pressure gauge. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application.

[0020] Please refer to Figs. 1-3 The present application provides a technical solution: an efficient aluminum ingot melting furnace, comprising:

[0021] The main melting furnace 1 is internally provided with a smelting cylinder 2, and a heating coil 3 for heating aluminum ingots is fixedly arranged outside the smelting cylinder 2. The heating coil 3 has the advantages of high thermal efficiency and fast melting speed, and is used in the high-power consumption stage of melting to achieve the purposes of energy saving and shortening of the melting period. A grate plate 4 is also fixedly arranged in the smelting cylinder 2. The upper part of the grate plate 4 is a melting zone. The grate plate 4 can play a filtering role, so that the aluminum ingots that are not completely melted are always in the melting zone.

[0022] The feeding cylinder 5 is fixedly installed on the top of the main melting furnace 1. An inlet 6 is formed on the upper side of the feeding cylinder 5, and a sealing assembly is arranged in the feeding cylinder 5. The sealing assembly can block the inlet of the main melting furnace 1 when needed. When feeding, the aluminum ingots enter the main melting furnace 1 through the feeding cylinder 5. The sealing assembly can prevent the gas in the main melting furnace 1 from escaping to the outside, and prevent the external air from entering the main melting furnace 1, thereby achieving the blocking of the inlet of the main melting furnace 1.

[0023] The heat preservation furnace 7 is fixedly arranged on one side of the main melting furnace 1. The bottom of the heat preservation furnace 7 is in communication with the bottom of the main melting furnace 1, and the top of the heat preservation furnace 7 is in communication with the top of the main melting furnace 1 through the air pressure balance pipe 8, so as to ensure that the air pressure in the heat preservation furnace 7 is consistent with that in the main melting furnace 1. When the sealing assembly blocks the inlet of the main melting furnace 1, the aluminum liquid in the main melting furnace 1 can smoothly flow into the heat preservation furnace 7. A plurality of electric heating rods 9 are arranged at the bottom of the heat preservation furnace 7, which can provide heat when the aluminum liquid is heat preserved. The electric heating rods 9 have the characteristics of low manufacturing cost and meet the requirement of accurate temperature control.

[0024] The discharge pipe 10 is fixedly arranged in the heat preservation furnace 7. The lower end of the discharge pipe 10 is arranged at the bottom of the heat preservation furnace 7, and the aluminum liquid can enter the discharge pipe 10 through the lower end. The upper end of the discharge pipe 10 extends to the outside of the heat preservation furnace 7.

[0025] The pressurized tank 11 is internally slidably provided with a piston 12, the top of which is fixedly provided with an extension rod 13 for driving the piston 12 to move, one side of the bottom of which is connected with the top of the holding furnace 7 through a connecting pipe 14, and the other side of the bottom is connected with a gas supply pipe 15, through which argon can be filled into the pressurized tank 11, and a one-way valve 16 is arranged on the gas supply pipe 15 to avoid the backflow of the gas in the pressurized tank 11 into the gas supply pipe 15, the extension rod 13 can push the piston 12 to descend, and the extension rod 13 can be a pneumatic cylinder or a hydraulic cylinder, when the piston 12 moves downward, the argon in the pressurized tank 11 enters the holding furnace 7 and the main melting furnace 1 through the connecting pipe 14, so that the air pressure in the holding furnace 7 and the main melting furnace 1 is increased, when the air pressure is increased, the aluminum liquid is squeezed into the discharge pipe 10, and the aluminum liquid is discharged out of the holding furnace 7 through the discharge pipe 10, and the feeding end of the main melting furnace 1 should be blocked by the sealing assembly during pressurization;

[0026] The explosion-proof valve 17 is fixedly installed on the side wall of the pressurized tank 11, and the horizontal height thereof is lower than the lower surface of the piston 12 when the piston 12 is at the highest point, when the piston 12 moves to the highest point, the air pressure in the pressurized tank 11 can act on the explosion-proof valve 17, that is, the explosion-proof valve 17 is used to release the pressure of the holding furnace 7 and the main melting furnace 1, so that accidents caused by excessive pressure in the furnace body are avoided, in addition, when the furnace body is pressurized, the piston 12 moves downward, when the piston 12 is lower than the explosion-proof valve 17, the gas in the pressurized tank 11 below the piston 12 cannot be discharged through the explosion-proof valve 17, so that the explosion-proof valve 17 is not triggered during pressurization.

[0027] As an embodiment of the present application, it further comprises:

[0028] The elevator 18 and the crusher 19, the discharge end of the crusher 19 is connected with the feeding end of the elevator 18, and the discharge end of the elevator 18 is connected with the feeding cylinder 5 above the sealing assembly, the aluminum ingot can be broken into small pieces by the crusher 19 before being put into the main melting furnace 1, so that the aluminum ingot is heated and melted, and the broken aluminum ingot pieces are conveyed into the main melting furnace 1 by the elevator 18.

[0029] As an embodiment of the present application, the sealing assembly comprises:

[0030] The sealing ring 20 is fixedly arranged on the inner wall of the feeding cylinder 5, and the inner ring opening is provided with a stepped groove 21; the extension rod 22 is fixedly arranged on the top of the feeding cylinder 5, and the extension end thereof extends into the feeding cylinder 5; the extension end of the extension rod 22 is fixedly provided with a sealing plate 23, the sealing plate 23 is below the sealing ring 20, and the edge thereof can be clamped into the stepped groove 21, the sealing plate 23 is pulled up by the extension rod 22, the extension rod 22 can be a pneumatic cylinder or a hydraulic cylinder, and the feeding end of the main melting furnace 1 is blocked when the sealing plate 23 is embedded in the stepped groove 21, the air tightness can be increased through the stepped groove 21; the upper surface of the sealing plate 23 is conical.

[0031] As one of the embodiments of the present application, it further comprises:

[0032] The discharge nozzle 24 is fixedly arranged above the outer surface of the holding furnace 7 away from the main furnace 1, and the upper end of the discharge pipe 10 is arranged in the discharge nozzle 24; the cover plate 25 is hingedly arranged on the discharge nozzle 24 and used for blocking the discharge nozzle 24 to improve the heat preservation effect of the holding furnace 7.

[0033] As one of the embodiments of the present application, a platform 26 is fixedly arranged below the discharge nozzle 24 on the outer surface of the holding furnace 7, a lifting plate 27 sliding in the vertical direction is arranged above the platform 26, and a spring 28 pushing the lifting plate 27 to reset upward is arranged in the platform 26; a connecting rod 29 is hingedly arranged at the lower end of the lifting plate 27, a pull rod is fixedly connected to one side of the cover plate 25, and the upper end of the connecting rod 29 is hingedly connected to the pull rod; the lifting plate 27 is used for placing the transfer bag, the lifting plate 27 can be lowered by compressing the spring 28 through the weight of the transfer bag, the connecting rod 29 is pulled by the lowering of the lifting plate 27, the pull rod is pulled by the connecting rod 29, the cover plate 25 is rotated and opened, and the cover plate 25 can be automatically opened after the transfer bag is placed on the lifting plate 27. The cover plate 25 can be reset by the spring 28 pushing the lifting plate 27 after the transfer bag is removed, and the discharge nozzle 24 is blocked.

[0034] As one of the embodiments of the present application, the connecting pipe 14 is divided into a cooling pipe 31 and a heating pipe 32 through two three-way pipes 30, two one-way valves 33 and 34 in opposite directions are arranged on the cooling pipe 31 and the heating pipe 32 respectively, the cooling pipe 31 is closed by the one-way valve 33 when the gas in the connecting pipe 14 flows into the holding furnace 7, the gas enters the heating pipe 32 to heat, and the temperature of the holding furnace 7 is reduced due to the injection of cold gas, the heating pipe 32 is closed by the one-way valve 34 when the gas in the connecting pipe 14 flows into the pressurizing tank 11, the gas enters the cooling pipe 31 to cool, the gas entering the pressurizing tank 11 is cooled to avoid the high temperature entering the pressurizing tank 11 to affect the service life of the piston 12.

[0035] As one of the embodiments of the present application, a pipe heater 35 is arranged on the outer side of the heating pipe 32, the heating pipe 32 is heated by the pipe heater 35, a plurality of fins 36 are arranged on the outer side of the cooling pipe 31, a cooling cylinder 37 is wrapped on the outer side of the plurality of fins 36, water inlet pipes and water outlet pipes are arranged on the cooling cylinder 37, cooling water can be introduced into the cooling cylinder 37 through the water inlet pipes and the water outlet pipes, the heat dissipation effect is improved through the fins 36, and the cooling pipe 31 is cooled.

[0036] As one of the embodiments of the present application, the feeding cylinder 5 is connected with an exhaust pipe 38, and the gas in the main furnace 1 is extruded out due to the entry of the material when the material is fed into the main furnace 1. The gas can be discharged through the exhaust pipe 38.

[0037] The working principle and use process of the present application: connect the gas supply pipe 15 to the external argon gas supply system, argon can enter the pressurized tank 11 and the furnace body through the connecting pipe 14, reduce the oxygen content in the furnace body, reduce the occurrence of aluminum liquid oxidation, the furnace body is the general term of the holding furnace 7 and the main smelting furnace 1;

[0038] When feeding, first control the sealing plate 23 to descend through the telescopic rod 22, open the sealing assembly, after the sealing assembly is opened, fill argon into the furnace body through the argon gas supply system, so that the gas pressure in the furnace body is greater than the external gas pressure, argon can be discharged through the sealing assembly, prevent external air from entering the furnace body, put the aluminum ingot into the crusher 19, crush the aluminum ingot into aluminum blocks through the crusher 19, the crushed aluminum blocks are transported to the feeding cylinder 5 through the elevator 18, at this time the aluminum blocks can pass through the sealing ring 20 into the main smelting furnace 1, after feeding is completed, pull the sealing plate 23 into the stepped groove 21 through the telescopic rod 22, so that the sealing assembly is closed, and at the same time stop injecting argon into the furnace body;

[0039] When melting the aluminum blocks, the aluminum blocks can be in the melting cylinder 2 in the height direction through the grate plate 4, heat the aluminum ingot in the melting cylinder 2 through the heating coil 3, the heating coil 3 has the advantages of high thermal efficiency and fast melting speed, and is used in the high-power consumption stage of melting to achieve the purposes of energy saving and shortening the melting period, the aluminum blocks are melted into aluminum liquid which flows to the holding furnace 7 through the grate plate 4, the aluminum liquid in the holding furnace 7 is heat-insulated through the heating rod, the electric heating rod 9 has the characteristics of low manufacturing cost, and at the same time meets the demand of accurate temperature control;

[0040] When the aluminum liquid needs to be discharged, first ensure that the sealing assembly is in the closed state, place the transfer bag on the lifting plate 27, the self-weight of the transfer bag can press down the lifting plate 27, the lifting plate 27 is lowered to drive the cover plate 25 to open, start the telescopic rod 1, push the piston 12 downward through the telescopic rod 1, when the piston 12 is lowered below the explosion-proof valve 17, the argon in the pressurized tank 11 can be squeezed into the furnace body, at this time the pressure in the furnace body increases, through the gas pressure balance pipe 8, the gas pressure in the main smelting furnace 1 and the holding furnace 7 can be consistent, because the gas pressure in the furnace body increases, the aluminum liquid is squeezed into the discharge pipe 10, the aluminum liquid flows into the discharge nozzle 24 through the discharge pipe 10, the aluminum liquid is discharged into the transfer bag below through the discharge nozzle 24 to complete the discharge, after the discharge is completed, control the telescopic rod 1 to retract, move the piston 12 to the highest point, because the aluminum liquid is partially discharged, the corresponding volume of argon should be supplemented into the furnace body, otherwise after the piston 12 moves to the highest point, negative pressure will be formed in the furnace body, the internal pressure of the furnace body can be detected through the gas pressure gauge 39 on the connecting pipe 14, when the pressure is lower than the set value, the argon gas supply system can be started to supplement argon, so as to ensure that the gas pressure in the furnace body is consistent with the external gas pressure, avoid external air entering the furnace body after the sealing assembly is opened.

[0041] The elevator 18 and the crusher 19 used in the present application are all conventional techniques, and their specific structures are not described in detail. In addition, the elevator 18 should be a chain plate elevator made of metal material to avoid the influence of high temperature.

[0042] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency aluminum ingot melting furnace, characterized by comprising: The utility model provides a kind of aluminum liquid heat preservation device, including: Main smelting furnace (1), the smelting cylinder (2) is equipped inside the main smelting furnace (1), heating coil (3) is fixedly arranged outside the smelting cylinder (2), grate plate (4) is also fixedly arranged in the smelting cylinder (2), and the grate plate (4) is melt zone above;The top of the main smelting furnace (1) is fixedly installed with feeding cylinder (5), the feeding cylinder (5) is opened with feeding port (6) on one side above, and the feeding cylinder (5) is equipped with sealing assembly inside;The side of the main smelting furnace (1) is fixedly provided with heat preservation furnace (7), the bottom of the heat preservation furnace (7) is communicated with the bottom of the main smelting furnace (1), the top of the heat preservation furnace (7) is communicated with the top of the main smelting furnace (1) by gas pressure balance pipe (8), the bottom of the heat preservation furnace (7) is provided with a plurality of electric heating rods (9), for providing heat when heat preservation of aluminium liquid;Heat preservation furnace (7) is fixedly provided with discharge pipe (10) in, the lower end of the discharge pipe (10) is placed in the bottom of the heat preservation furnace (7), and the upper end of the discharge pipe (10) extends to the outside of the heat preservation furnace (7);Still include pressurized tank (11), the piston (12) is slidably arranged in the pressurized tank (11), the top of the pressurized tank (11) is fixedly provided with telescopic rod one (13) for driving the piston (12) moves, one side of the bottom of the pressurized tank (11) is communicated with the top of the heat preservation furnace (7) by connecting pipe (14), the other side of the bottom of the pressurized tank (11) is connected with gas supply pipe (15), and the gas supply pipe (15) is equipped with one-way valve one (16);Explosion-proof valve (17) is fixedly installed on the lateral wall of the pressurized tank (11), the horizontal height of the explosion-proof valve (17) is lower than the lower surface when the piston (12) is located at the highest point, when piston (12) moves downwards to below the explosion-proof valve (17), the gas in the pressurized tank (11) below the piston (12) cannot be discharged through explosion-proof valve (17).

2. The high efficiency aluminum ingot melting furnace of claim 1, wherein Still include: Elevator (18) and crusher (19), the discharge end of the crusher (19) is connected with the feeding end of the elevator (18), and the discharge end of the elevator (18) is connected on the feeding cylinder (5) above the sealing assembly.

3. The high efficiency aluminum ingot melting furnace of claim 1, wherein, The sealing assembly includes sealing ring (20) fixedly arranged on the inner wall of feeding cylinder (5), and the inner ring opening of the sealing ring (20) is provided with stepped groove (21);Telescopic rod two (22) is fixedly arranged on the top of the feeding cylinder (5), and the telescopic end of the telescopic rod two (22) extends into the feeding cylinder (5);The telescopic end of the telescopic rod two (22) is fixedly provided with sealing plate (23), and the sealing plate (23) is below the sealing ring (20), and the edge of the sealing plate (23) can be clamped into the stepped groove (21).

4. The high efficiency aluminum ingot melting furnace of claim 1, wherein, The discharge nozzle (24) is fixedly arranged above the outer surface of the heat preservation furnace (7) away from the main smelting furnace (1), and the upper end of the discharge pipe (10) is placed in the discharge nozzle (24), and the cover plate (25) for plugging the discharge nozzle (24) is hinged on the discharge nozzle (24).

5. The high efficiency aluminum ingot melting furnace of claim 4, wherein, The platform (26) is fixedly arranged below the discharge nozzle (24) on the outer surface of the holding furnace (7), a lifting plate (27) is arranged above the platform (26) and slides in the vertical direction, a spring (28) is arranged in the platform (26) and pushes the lifting plate (27) to reset upward; further comprising a connecting rod (29), the lower end of the connecting rod (29) is hinged to the lifting plate (27), and the side of the cover plate (25) is fixedly connected with a pull rod, the pull rod is hinged to the upper end of the connecting rod (29).

6. The high efficiency aluminum ingot melting furnace of claim 1, wherein, Two three-way pipes (30) are arranged on the connecting pipe (14) to branch off a cooling pipe (31) and a heating pipe (32), two one-way valves (33) and (34) with opposite directions are respectively arranged on the cooling pipe (31) and the heating pipe (32).

7. The high efficiency aluminum ingot melting furnace of claim 6, wherein, A pipe heater (35) is arranged outside the heating pipe (32), a plurality of fins (36) are arranged outside the cooling pipe (31), a cooling cylinder (37) is wrapped outside the cooling pipe (31) and a plurality of fins (36), and the cooling cylinder (37) is provided with a water inlet pipe and a water outlet pipe.

8. The high efficiency aluminum ingot melting furnace of claim 1, wherein, The feeding cylinder (5) is connected with an exhaust pipe (38) at the top.

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