Energy-saving melting device with special section

Abstract

The utility model discloses a special-shaped energy -conserving smelting device. Special-shaped energy -conserving smelting device includes: smelting container, the inside of smelting container has smelting chamber, and the chamber bottom of smelting chamber has at least one convex structure, and the inside of convex structure is the cavity structure of open bottom, first heating mechanism, second heating mechanism and lifting mechanism, and first heating mechanism is fixedly arranged in the outside of smelting container along the radial direction of smelting container, and with smelting container heat conduction cooperation, and second heating mechanism is movably arranged in cavity structure, and second heating mechanism is also transmission connection with lifting mechanism, and can be driven under the lifting mechanism along the vertical depth direction of cavity structure and lift. The special-shaped energy -conserving smelting device in the utility model has larger heating area, higher structural strength and rigidity, reduces the risk of deformation, and the smelting time can be shortened to 3 hours by using the special-shaped energy -conserving smelting device of the utility model.

Description

Technical Field

[0001] This utility model specifically relates to an irregularly shaped energy-saving smelting device, belonging to the technical field of metal smelting equipment. Background Technology

[0002] In the field of metal smelting and processing, magnesium and aluminum alloys are widely used in key industries such as aerospace, automobile manufacturing, and electronic communications due to their excellent mechanical properties, lightweight characteristics, and good machinability. The melting process of magnesium and aluminum alloys, as the core link in their smelting and subsequent processing (such as casting and die casting), directly affects the quality of the melt, production efficiency, and energy consumption.

[0003] In existing technologies, crucibles used for melting magnesium and aluminum alloys are key equipment for achieving metal melting, and their structural design and heating method play a decisive role in the melting effect. Traditional crucibles for melting magnesium and aluminum alloys are mainly divided into two types: round crucibles and trough-shaped crucibles. These two types of crucibles are widely used in small and medium-sized smelting scenarios due to their simple structure, mature manufacturing process, and relatively low cost.

[0004] Both of the above-mentioned traditional crucible heating methods involve heating from the outside of the crucible through thermal radiation. The heat is conducted through the crucible wall to the metal material inside, thereby melting the metal. For crucibles with smaller capacities (such as less than 100 kg), due to the small amount of metal material and low heat capacity, the heat generated by external radiation heating can be transferred to the interior of the metal relatively quickly, so the heating speed can still meet production requirements.

[0005] However, with the increasing demand for magnesium and aluminum alloys in industrial production, the application of large-capacity crucibles (such as those weighing over 500 kg) is becoming increasingly widespread, highlighting the limitations of traditional crucible structures and heating methods. Specifically, for large-capacity crucibles, due to the large amount of metal raw material and the long heat conduction path, the heat from external radiation heating cannot quickly and evenly penetrate into the deep layers of the metal raw material inside the crucible, resulting in a significant extension of the overall heating and melting time, typically exceeding 6 hours.

[0006] The prolonged heating process not only significantly reduces production efficiency and increases energy consumption per unit product, but more seriously, magnesium and aluminum, as chemically reactive metals, react violently with oxygen in the air when exposed to the smelting environment at high temperatures for extended periods (even under a protective atmosphere, there is still a certain risk of oxidation). This leads to severe oxidation of the melt and the formation of numerous oxide inclusions. These inclusions directly affect the mechanical properties (such as strength and toughness) and surface quality of subsequent castings, increasing the scrap rate. Furthermore, severe oxidation can cause the melt composition to deviate from design requirements, further reducing the stability of material properties. Therefore, the problems of long heating times and severe melt oxidation in traditional round and trough crucibles during the melting of large-capacity magnesium and aluminum alloys have become key bottlenecks restricting the efficient and high-quality melting of large-capacity magnesium and aluminum alloys, necessitating a new crucible structure that can address these shortcomings. Utility Model Content

[0007] In view of the problems of slow melting speed and low energy efficiency of existing crucibles for magnesium and aluminum alloys, the main purpose of this utility model is to provide an irregularly shaped energy-saving melting device, which improves melting efficiency and reduces the oxidation problem of melt caused by prolonged heating, thereby overcoming the shortcomings of the existing technology.

[0008] To achieve the aforementioned objectives, the technical solution adopted by this utility model includes:

[0009] The first aspect of this utility model embodiment provides an irregularly shaped energy-saving smelting apparatus, which includes:

[0010] A melting container, wherein the interior of the melting container has a melting chamber, and the central region of the bottom of the melting chamber has a protruding structure, the interior of the protruding structure being an open cavity structure;

[0011] The system comprises a first heating mechanism, a second heating mechanism, and a lifting mechanism. The first heating mechanism is fixedly disposed radially on the outside of the melting container and thermally connected to the melting container. The second heating mechanism is movably disposed within the cavity structure and is also connected to the lifting mechanism. It can move up and down along the depth of the cavity structure under the drive of the lifting mechanism. By changing the depth position of the second heating mechanism within the cavity structure, the convection velocity in the melt within the melting chamber can be changed.

[0012] Compared with the prior art, the advantages of this utility model include:

[0013] The irregularly shaped energy-saving melting device provided in this embodiment of the utility model has a larger heating area, higher structural strength and rigidity, and reduces the risk of deformation. Using the irregularly shaped energy-saving melting device of this utility model, the melting time can be shortened to 3 hours (500Kg).

[0014] This utility model provides an irregularly shaped energy-saving melting device with a raised center in the melting chamber and a hollow structure formed within the raised structure. At the same time, a heating mechanism is added inside the hollow structure for heating, thus achieving simultaneous heating of the inside and outside of the melting container, increasing the heating area of ​​the melting container, accelerating the melting of the alloy, increasing the heating area by 25% compared to traditional crucibles, and shortening the melting time by 35%. Attached Figure Description

[0015] Figure 1 , Figure 2 This is a schematic diagram of the structure of an irregularly shaped energy-saving smelting device provided in a typical embodiment of this utility model;

[0016] Figure 3 This refers to the temperature distribution of the melt inside a traditional crucible;

[0017] Figure 4 This is a typical embodiment of the present invention, which provides a temperature distribution of the melt inside an irregularly shaped energy-saving crucible. Detailed Implementation

[0018] In view of the shortcomings of the prior art, the inventor of this case, through long-term research and extensive practice, has come up with the technical solution of this utility model. The following will further explain the technical solution, its implementation process, and its principles.

[0019] The first aspect of this utility model embodiment provides an irregularly shaped energy-saving smelting apparatus, which includes:

[0020] A melting container, wherein the interior of the melting container has a melting chamber, and the central region of the bottom of the melting chamber has a protruding structure, the interior of the protruding structure being an open cavity structure;

[0021] The system comprises a first heating mechanism, a second heating mechanism, and a lifting mechanism. The first heating mechanism is fixedly disposed radially on the outside of the melting container and thermally connected to the melting container. The second heating mechanism is movably disposed within the cavity structure and is also connected to the lifting mechanism. It can move up and down along the depth of the cavity structure under the drive of the lifting mechanism. By changing the depth position of the second heating mechanism within the cavity structure, the convection velocity in the melt within the melting chamber can be changed.

[0022] Furthermore, the protruding direction of the protruding structure is parallel to the axial direction of the melting chamber and the longitudinal direction of the cavity structure, and the height h of the protruding structure is (1 / 3 to 3 / 4)H, where H is the height of the melting chamber.

[0023] Furthermore, the central axis of the protruding structure coincides with the central axis of the melting chamber.

[0024] Furthermore, the surface of the protruding structure is smoothly connected to the bottom of the melting chamber, the top surface of the protruding structure is a curved surface that protrudes upward along the axial direction of the melting chamber, and the bottom of the melting chamber is a curved surface that is concave downward along the axial direction of the melting chamber.

[0025] Furthermore, the first heating mechanism is a cylindrical structure sleeved on the outside of the melting container, and the second heating mechanism is a cylindrical structure sleeved inside the cavity structure. Both the first heating mechanism and the second heating mechanism are in thermal contact with the melting container.

[0026] Furthermore, the first heating mechanism is an electrothermal heating mechanism.

[0027] Furthermore, the first heating mechanism is a conductive coil.

[0028] Furthermore, the second heating mechanism is an electrothermal heating mechanism, and the second heating mechanism is a conductive coil.

[0029] It should be noted that the heating power of the first heating mechanism and the second heating mechanism can be adjusted independently.

[0030] Furthermore, the smelting container includes a container shell, which encloses the smelting chamber, and a portion of the bottom of the container shell protrudes upward along the axial direction of the smelting container to form the protruding structure.

[0031] Furthermore, the interior of the container shell is a hollow sandwich cavity, and the container shell is also provided with an air inlet and an air outlet. In addition, the irregularly shaped energy-saving smelting device also includes an airflow cooling mechanism, which is connected to the air inlet and is used to input cooling gas into the sandwich cavity. The cooling gas enters from the air inlet and exits from the air outlet, forming a gas vortex flowing around the smelting cavity in the sandwich cavity.

[0032] Furthermore, the air inlet is located in the bottom region of the melting vessel, and the air outlet is located in the top region of the melting vessel.

[0033] Furthermore, the air inlet and the air outlet are located at diagonal positions on the melting vessel.

[0034] Furthermore, the smelting container also includes a heat insulation structure, which is wrapped around the outside of the container shell.

[0035] Furthermore, the second heating mechanism is fixedly mounted on a support body, which is connected to the lifting mechanism via a transmission connection.

[0036] Furthermore, the support body includes a base part and a support part, the support part is fixedly disposed on the base part, the support part is movably disposed within the cavity structure, the second heating mechanism is fixedly disposed on the support part, and the lifting mechanism is connected to the base part.

[0037] A second aspect of this utility model provides a method for smelting metal, comprising:

[0038] Provide the aforementioned irregular-shaped energy-saving smelting device;

[0039] The metal material to be melted is placed in the melting chamber;

[0040] Simultaneously, the first heating mechanism and the second heating mechanism heat the metal material located in the melting chamber and melt the metal material to form a melt. The lifting mechanism drives the second heating mechanism to move up and down along the depth direction of the cavity structure to change the convection flow rate in the melt located in the melting chamber.

[0041] In a more specific implementation, the method for smelting metal further includes: adjusting the heating power of the first heating mechanism and / or the second heating mechanism to change the convection flow rate in the melt located in the smelting chamber.

[0042] In a more specific embodiment, the method of smelting metal further includes: after melting the metal material to form a melt, introducing cooling gas into the jacketed cavity inside the outer shell of the smelting container, the cooling gas entering from the bottom region of the smelting container and exiting from the top region of the smelting container, the cooling gas forming a gas vortex flowing around the smelting cavity in the jacketed cavity.

[0043] The following will provide a further explanation of the technical solution, its implementation process, and its principles, in conjunction with the accompanying drawings and specific implementation examples.

[0044] In a more typical implementation scheme, please refer to Figure 1 and Figure 2An irregularly shaped energy-saving smelting device includes a smelting container 100, a first heating mechanism 210, a second heating mechanism 220, and a lifting mechanism 230. The smelting container 100 has a smelting chamber 110 inside. The central region of the bottom of the smelting chamber 110 has a protruding structure 120, the interior of which is an open-bottomed cavity. The first heating mechanism 210 is fixedly disposed radially on the outside of the smelting container 100 and thermally conductively connected to it. The second heating mechanism 220 is movably disposed within the cavity structure. The second heating mechanism 220 is also connected to the lifting mechanism 230 and can move up and down along the depth direction of the cavity structure under the drive of the lifting mechanism 230. The depth position of the second heating mechanism 220 in the cavity structure is adjustable. It can be understood that by changing the depth position of the second heating mechanism 220 in the cavity structure, the effective heating area of ​​the second heating mechanism 220 and the distance between the second heating mechanism 220 and the cavity structure in the depth direction can be changed, thereby changing the heating efficiency of the second heating mechanism 220, so as to change the convection velocity in the melt in the melting chamber.

[0045] Specifically, after the metal material is completely melted to form a melt, in order to ensure the uniformity of the chemical composition of the melt, the second heating mechanism 220 is driven to move up and down along the longitudinal direction of the cavity structure by the lifting mechanism 230. This can change the heating efficiency of the second heating mechanism 220, and change the temperature difference between the melt near the outer region of the first heating mechanism 210 and the inner region near the second heating mechanism 220. The convection flow rate in the melt in the melting chamber changes accordingly, thereby redistributing the composition in the melt and reducing segregation.

[0046] Specifically, in the initial stage of melting, heat is radiated to the melting container through the first heating mechanism and the second heating mechanism to melt the metal material. As the first heating mechanism and the second heating mechanism continue to heat, the melt near the wall of the melting container transfers heat to the melt inside through convection. When the temperature of the melt is uniform, the second heating mechanism located inside is moved downward to reduce the convection velocity and its heating power, so as to save energy.

[0047] Understandably, the first heating mechanism 210 and the second heating mechanism 220 transfer heat to the metal raw material / melt through the melting container 100. By setting a protruding structure 120 at the bottom of the melting chamber 110, the surface area inside the melting chamber 110 can be increased, that is, the contact area between the metal raw material / melt and the melting container 100 can be increased, thereby improving the heating efficiency of the irregular energy-saving melting device. By setting the protruding structure 120, the heating area can be increased by at least 25%.

[0048] Specifically, the protruding direction of the protruding structure 120 is parallel to the axial direction of the melting chamber 110 and the longitudinal direction of the cavity structure. More specifically, the central axis of the protruding structure 120 coincides with the central axis of the melting chamber 110. That is, in the radial direction, the protruding structure 120 is located in the central region of the melting chamber 110, and in the axial direction, the height h of the protruding structure 120 is (1 / 3 to 3 / 4)H, where H is the height of the melting chamber 110. Through this design, the convection effect of the melt in the melting chamber 110 can be improved, thereby affecting the heating rate and temperature uniformity of the melt.

[0049] Please refer to the following for details. Figure 1 and Figure 2 The smelting container 100 includes a container shell 130, which encloses the smelting chamber 110. A portion of the bottom of the container shell 130 protrudes upwards along the axial direction of the smelting container 100 to form the raised structure 120. It is understood that the container shell 130 can be a one-piece cast structure. The container shell 130 is an irregularly shaped structure, primarily referring to an irregularly shaped bottom. Specifically, a portion of the bottom protrudes / bends upwards along the axial direction of the smelting container 100 to form the raised structure 120. Specifically, the container shell 130 is a shell with good thermal conductivity, such as a stainless steel shell, a low-carbon steel shell, or a cast steel shell. It should be noted that the smelting container 100 may also include an openable and closable container lid.

[0050] More specifically, the surface of the protruding structure 120 is smoothly connected to the bottom of the melting chamber 110. The top surface of the protruding structure 120 is a curved surface that protrudes upward along the axial direction of the melting chamber 110, and the bottom of the melting chamber 110 is a curved surface that is concave downward along the axial direction of the melting chamber 110. For example, the radius of curvature R of these curved surface structures is greater than 50 mm. This design not only increases the surface area of ​​the inner wall of the melting chamber 110, but also makes the temperature distribution of the melt in the melting chamber 110 more uniform. In addition, by making the inner wall of the melting chamber 110 a smoothly transitioned inner wall structure through the curved surface, the convection resistance of the melt is reduced, stress is reduced, and service life is improved.

[0051] Specifically, the first heating mechanism 210 is a cylindrical structure sleeved on the outside of the melting container 100, and the second heating mechanism 220 is a cylindrical structure sleeved inside the cavity structure. Both the first heating mechanism 210 and the second heating mechanism 220 are in thermally conductive contact with the melting container 100. More specifically, both the first heating mechanism 210 and the second heating mechanism 220 are electrothermal heating mechanisms. For example, both the first heating mechanism 210 and the second heating mechanism 220 are conductive coils. By connecting the first heating mechanism 210 and the second heating mechanism 220 to a power source, they generate heat through the current heating effect, thereby heating the melting container 100. It should be noted that, in order to avoid connecting the melting container 100 to a power source, the surface area of ​​the melting container 100 in contact with the first heating mechanism 210 and the second heating mechanism 220 can be provided with an insulating thermally conductive layer, which can be an alumina layer, etc.

[0052] Specifically, the lifting mechanism 230 can be directly connected to the second heating mechanism 220. As those skilled in the art will readily understand, since the second heating mechanism 220 is an electrothermal mechanism, the second heating mechanism 220 and the lifting mechanism 230 are insulated. For example, an insulating structure (such as an insulating pad) is provided between the second heating mechanism 220 and the lifting mechanism 230. This ensures that the second heating mechanism 220 can be lifted and lowered by the lifting mechanism 230 while preventing electrical conductivity between the second heating mechanism 220 and the lifting mechanism 230. These are all known and readily conceived in the art, and no further limitations are made here. For example, the lifting mechanism 230 can be a linear drive motor, a linear drive cylinder, a linear drive hydraulic cylinder, etc.

[0053] In a more typical implementation plan, please refer again. Figure 1 and Figure 2The second heating mechanism can be fixedly mounted on a support body 400, which is kinetically connected to the lifting mechanism 230. The support body 400 is an insulator, for example, it can be a ceramic component. More specifically, the support body 400 includes a base portion 410 and a support portion 420. The support portion 420 is fixedly mounted on the base portion 410 and movably mounted within the cavity structure. The second heating mechanism is fixedly mounted on the support portion 420, and the lifting mechanism 230 is connected to the base portion 410. Specifically, the radial cross-sectional area of ​​the support portion 420 is smaller than that of the base portion 410, and the outline shape of the support portion 420 is the same as or similar to the cavity structure inside the protruding structure 120. The radial cross-sectional area of ​​the support portion 420 is smaller than that of the cavity structure, so that the support portion 420 and the second heating mechanism 220 fixed on the support portion 420 can move up and down within the cavity structure. The radial cross-sectional area of ​​the base portion 410 is larger than the radial cross-sectional area of ​​the cavity structure. For example, the radial cross-sectional area of ​​the base portion 410 can be similar to the radial cross-sectional area of ​​the entire melting container 100.

[0054] Please refer again to a more detailed implementation plan. Figure 1 and Figure 2 The melting container 100 also includes a heat insulation structure 140, which is wrapped around the outside of the container shell 130. It is understood that the first heating mechanism 210 is located between the heat insulation structure 140 and the container shell 130. It is also understood that the heat insulation structure 140 is insulating; for example, it may be a calcium silicate insulation sleeve, etc.

[0055] Specifically, when conductive coils are used as the first heating mechanism and the second heating mechanism, a spiral positioning groove can be provided on the outer peripheral surface of the support 400. The conductive coil of the first heating mechanism can be fixed in the positioning groove on the support to achieve positioning and fixation of the first heating mechanism. At the same time, a spiral positioning groove is also provided on the outer peripheral surface of the container shell 130 of the melting container 100. The conductive coil of the second heating mechanism can be fixed in the positioning groove on the container shell 130 to achieve positioning and fixation of the second heating mechanism. Of course, the positioning groove for fixing the second heating mechanism can also be provided on the side surface of the insulation structure facing the container shell 130.

[0056] Please refer again to a more detailed implementation plan. Figure 1 and Figure 2The container shell 130 has a hollow jacketed cavity 131 inside. The container shell 130 is also provided with an air inlet 132 and an air outlet 133. Furthermore, the irregularly shaped energy-saving melting device also includes an airflow cooling mechanism. This airflow cooling mechanism is connected to the air inlet 132 and is used to input cooling gas into the jacketed cavity 131. The cooling gas enters through the air inlet 132 and exits through the air outlet 133, forming a gas vortex flowing around the melting chamber 110 within the jacketed cavity 131 to meet the requirement of rapid cooling of the melt. It should be noted that this airflow cooling mechanism can be any mechanism known in the art capable of cooling other supplies; its specific structure and equipment model are not limited here.

[0057] Specifically, the air inlet 132 is located in the bottom region of the melting container 100, and the air outlet 133 is located in the top region of the melting container 100. Preferably, the air inlet 132 and the air outlet 133 are located at diagonal positions of the melting container 100.

[0058] Specifically, the melting container 100 can be a crucible. When the melting container 100 is a crucible for melting magnesium alloys, the outer shell 130 is preferably made of composite steel plate. For example, the outer shell of the outer shell 130 is made of stainless steel, and the inner shell is made of low-carbon steel. When the melting container 100 is a crucible for melting aluminum alloys, both the inner and outer shells of the outer shell 130 are made of cast steel. More specifically, a limiting ring is also provided on the top of the melting container 100. The limiting ring is arranged around the periphery of the container opening at the top of the melting container 100 and extends radially outward along the melting container 100. More specifically, the limiting ring can cover the top of the insulation structure. The limiting ring is an insulating structure, such as a rubber ring, which is mainly used to prevent the melting container 100 from contacting the conductive mechanism inside the melting furnace when the melting container 100 is placed into the melting furnace, thus avoiding the risk of electric shock.

[0059] In a more specific implementation plan, using, for example Figure 1 and Figure 2 The method for smelting metal using the irregularly shaped energy-saving smelting apparatus shown includes:

[0060] When melting begins, the lifting mechanism 230 drives the second heating mechanism 220 to the highest position in the cavity structure, and the first heating mechanism 210 and the second heating mechanism 220 heat simultaneously. After the metal material in the melting chamber 110 is completely melted, in order to ensure the uniformity of the chemical composition of the melt, the lifting mechanism 230 moves the second heating mechanism 220 at the bottom up and down to change the convection velocity in the melt, thereby redistributing the composition in the melt and reducing segregation. When ready to pour, the lifting mechanism 230 is lowered and the power is turned off (to save energy). In addition, the heating power of the first heating mechanism and / or the second heating mechanism can be adjusted to change the convection velocity in the melt located in the melting chamber.

[0061] For alloys requiring rapid cooling, the melting chamber 110 and heating power supply are shut off at this time, and compressed air is introduced into the outer shell 130 of the melting container 100. The compressed air enters from the bottom vent and exits from the top outlet 133, forming a swirling gas flow to ensure rapid cooling.

[0062] Melting and casting tests were conducted using a 200kg conventional crucible and the crucible of this invention, with magnesium alloy as the test object. By comparing the conventional crucible with a hollow protruding structure 120 inside the melting chamber 110 and the crucible with the structure of this invention, the temperature distribution of the melt inside the conventional crucible is as follows: Figure 3 As shown, the temperature distribution of the melt inside the crucible in this invention is as follows: Figure 4 As shown, the temperature distribution of the melt inside the crucible of this invention is more uniform and the dispersion is lower. Furthermore, the melting time of the crucible using this invention is reduced by 35% compared to the traditional crucible.

[0063] The irregularly shaped energy-saving melting device provided in this embodiment of the utility model has a larger heating area, higher structural strength and rigidity, and reduces the risk of deformation. Using the irregularly shaped energy-saving melting device of this utility model, the melting time can be shortened to 3 hours (500Kg).

[0064] This utility model provides an irregularly shaped energy-saving melting device with a raised center in the melting chamber and a hollow structure formed within the raised structure. At the same time, a heating mechanism is added inside the hollow structure for heating, thus achieving simultaneous heating of the inside and outside of the melting container, increasing the heating area of ​​the melting container, accelerating the melting of the alloy, increasing the heating area by 25% compared to traditional crucibles, and shortening the melting time by 35%.

[0065] It should be understood that the above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An irregularly shaped energy-saving smelting device, characterized in that, include: A melting container, wherein the interior of the melting container has a melting chamber, and the central region of the bottom of the melting chamber has a protruding structure, the interior of the protruding structure being an open cavity structure; The system comprises a first heating mechanism, a second heating mechanism, and a lifting mechanism. The first heating mechanism is fixedly disposed radially on the outside of the melting container and thermally connected to the melting container. The second heating mechanism is movably disposed within the cavity structure and is also connected to the lifting mechanism. It can move up and down along the depth of the cavity structure under the drive of the lifting mechanism. By changing the depth position of the second heating mechanism within the cavity structure, the convection velocity of the melt in the melting chamber can be changed.

2. The irregular-shaped energy-saving smelting device according to claim 1, characterized in that: The protruding direction of the protruding structure is parallel to the axial direction of the melting chamber and the longitudinal direction of the cavity structure. The height h of the protruding structure is (1 / 3~3 / 4)H, where H is the height of the melting chamber.

3. The irregular-shaped energy-saving smelting device according to claim 2, characterized in that: The central axis of the protruding structure coincides with the central axis of the melting chamber.

4. The irregular-shaped energy-saving smelting device according to claim 1, characterized in that: The surface of the protruding structure is smoothly connected to the bottom of the melting chamber. The top surface of the protruding structure is a curved surface that protrudes upward along the axial direction of the melting chamber, and the bottom of the melting chamber is a curved surface that is concave downward along the axial direction of the melting chamber.

5. The irregular-shaped energy-saving smelting device according to claim 1 or 2, characterized in that: The first heating mechanism is a cylindrical structure sleeved on the outside of the melting container, and the second heating mechanism is a cylindrical structure sleeved inside the cavity structure. Both the first heating mechanism and the second heating mechanism are in thermal contact with the melting container.

6. The irregular-shaped energy-saving smelting device according to claim 5, characterized in that: The first heating mechanism is an electrothermal heating mechanism.

7. The irregular-shaped energy-saving smelting device according to claim 6, characterized in that: The first heating mechanism is a conductive coil.

8. The irregular-shaped energy-saving smelting device according to claim 5, characterized in that: The second heating mechanism is an electrothermal heating mechanism, and the second heating mechanism is a conductive coil.

9. The irregular-shaped energy-saving smelting device according to claim 1, characterized in that: The smelting container includes a container shell, which encloses the smelting chamber, and a portion of the bottom of the container shell protrudes upward along the axial direction of the smelting container to form the protruding structure.

10. The irregular-shaped energy-saving smelting device according to claim 9, characterized in that: The container shell has a hollow sandwich cavity inside. The container shell is also provided with an air inlet and an air outlet. The irregularly shaped energy-saving smelting device also includes an airflow cooling mechanism. The airflow cooling mechanism is connected to the air inlet and is used to input cooling gas into the sandwich cavity. The cooling gas enters from the air inlet and exits from the air outlet, forming a gas vortex flowing around the smelting cavity in the sandwich cavity.

11. The irregular-shaped energy-saving smelting device according to claim 10, characterized in that: The air inlet is located in the bottom area of ​​the smelting container, and the air outlet is located in the top area of ​​the smelting container.

12. The irregular-shaped energy-saving smelting device according to claim 11, characterized in that: The air inlet and the air outlet are located at opposite corners of the smelting vessel.

13. The irregular-shaped energy-saving smelting device according to claim 9, characterized in that: The smelting container also includes a heat insulation structure, which is wrapped around the outside of the container shell.

14. The irregular-shaped energy-saving smelting device according to claim 1, characterized in that: The second heating mechanism is fixedly mounted on a support body, which is connected to the lifting mechanism via a transmission connection.

15. The irregular-shaped energy-saving smelting device according to claim 14, characterized in that: The support body includes a base part and a support part. The support part is fixedly disposed on the base part and movably disposed within the cavity structure. The second heating mechanism is fixedly disposed on the support part, and the lifting mechanism is connected to the base part.

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