Aluminum scrap recovery smelting furnace

Abstract

The utility model relates to aluminium scrap recycling technical field provides an aluminium scrap recycling smelting furnace, including furnace body and heating device, the furnace body includes outer frame and is used for collecting and storing the rotary furnace pipe of aluminium scrap, is connected with first receiving seat on the outer frame outside wall, be equipped with auxiliary motion subassembly on first receiving seat, the rotary furnace pipe rotation frame is established on auxiliary motion subassembly, be equipped with gas outlet on the rotary furnace pipe, heating device includes smelting jar and heating component, smelting jar is fixed in the outer frame, the smelting jar is formed with the smelting cavity that surrounds the rotary furnace pipe outside, the smelting cavity outer periphery interval distribution has heating component, heating component includes a plurality of heating pipes, is equipped with heating wire in the heating pipe, the utility model solves the problem that aluminium scrap is oxidized extremely easily in smelting process and the existing furnace type heat source heat transfer path long, and has simple structure and low manufacturing cost's advantage.

Description

Technical Field

[0001] This utility model relates to the field of aluminum scrap recycling technology, and more specifically, to an aluminum scrap recycling smelting furnace. Background Technology

[0002] Aluminum and aluminum alloys are widely used in machining, automobile manufacturing, aerospace, and other fields. The production process generates a large amount of tangled aluminum shavings, contaminated with oil and cutting fluid. Recycling and smelting these aluminum shavings has extremely high economic value and environmental significance, and is a key link in achieving resource recycling in the aluminum industry. Currently, the industry mainly uses traditional reverberatory furnaces, crucible furnaces, or side-shaft furnaces for aluminum shaving recycling and smelting. However, these smelting furnaces generally have the following technical defects when processing aluminum shavings, especially fine, loose aluminum shavings with a large specific surface area: ① Aluminum shavings are extremely prone to oxidation during the smelting process. In traditional furnaces, during charging and smelting, a large area of ​​aluminum shavings is exposed to high-temperature air, resulting in severe oxidation and the formation of a large amount of non-reducible oxide slag (aluminum ash), increasing the burn-off rate of metallic aluminum and causing serious resource waste and economic losses; ② Aluminum shavings have low bulk density and poor thermal conductivity. The heat source of existing furnaces is usually located at the bottom or side of the furnace body. Heat needs to be transferred indirectly to the aluminum chips on the upper layer through the molten pool or furnace wall. The heat transfer path is long and the efficiency is low. A large amount of heat is carried away or lost by the furnace gas, resulting in long smelting time and high energy consumption. Utility Model Content

[0003] Based on this, in order to solve the problems of easy oxidation of aluminum scraps during the smelting process and the long heat transfer path of existing furnace types, this utility model provides an aluminum scrap recycling smelting furnace, the specific technical solution of which is as follows: An aluminum scrap recycling and smelting furnace includes a furnace body and a heating device. The furnace body includes an outer frame and a rotating furnace tube for collecting and storing aluminum scrap. A first receiving seat is connected to the outer wall of the outer frame, and an auxiliary component is provided on the first receiving seat. The rotating furnace tube is rotatably mounted on the auxiliary component and has a gas outlet. The heating device includes a smelting ladle and heating components. The smelting ladle is fixed inside the outer frame, and a smelting cavity is formed inside the smelting ladle, surrounding the outside of the rotating furnace tube. Heating components are spaced apart on the outer periphery of the smelting cavity. Each heating component includes multiple heating tubes, and heating wires are provided inside the heating tubes.

[0004] The aforementioned aluminum scrap recycling and smelting furnace directly heats the aluminum scrap within a sealed rotary furnace tube. The rotation continuously tumbles the scrap, ensuring uniform heating and effectively breaking down the surface oxide film. More importantly, the entire preheating and initial melting process is completed inside the rotary furnace tube in an air-isolated environment. This minimizes contact between the aluminum scrap and oxygen before it reaches a molten state, reducing the main oxidation losses that occur during the preheating and feeding stages in traditional processes and fundamentally improving the metal recovery rate. Furthermore, the heating components act directly on the outer wall of the rotary furnace tube, eliminating the need for indirect heat transfer through a smelting ladle or molten pool. This results in a very short heat transfer path and minimal heat loss. Additionally, the volatile gases generated from the decomposition of oil and moisture in the aluminum scrap within the rotary furnace tube can be collected centrally through the outlet and introduced into a purification device, effectively controlling the fugitive emissions of flue gas and harmful gases at the source.

[0005] Furthermore, the aluminum scrap recycling and smelting furnace also includes an installation platform, on which a control panel is connected, and at each of the four corners of the bottom of the installation platform, lifting feet are threaded on.

[0006] Furthermore, the outer frame is detachably mounted on the top of the mounting platform, the top of the mounting platform has a slot, the mounting platform has a stabilizing structure inside, one end of the stabilizing structure is rotatably connected to the bottom of the mounting platform, and the other end of the stabilizing structure extends through the slot and is rotatably connected to the bottom of the outer frame.

[0007] Furthermore, the top of the outer frame is covered with an exhaust cover, and the top of the exhaust cover has multiple exhaust holes spaced apart.

[0008] Furthermore, the first receiving seat is connected to one side of the outer wall of the outer frame, and the second receiving seat is connected to the other side of the outer frame. The auxiliary component is also mounted on the second receiving seat, and the two ends of the rotary furnace tube are respectively rotatably mounted on the two auxiliary components.

[0009] Furthermore, a drive motor is provided inside the first receiving seat, a drive gear is sleeved on the output end of the drive motor, a driven gear is sleeved on the rotary furnace tube, the drive gear and the driven gear mesh with each other, and a cooling fan facing the drive motor is also provided at the bottom of the first receiving seat.

[0010] Furthermore, the auxiliary assembly includes a snap-fit ​​plate and two auxiliary rollers for cooperating to support the rotation of the rotary furnace tube. The snap-fit ​​plate is threadedly fixed in the first or second receiving seat, and the two auxiliary rollers are rotatably mounted on the snap-fit ​​plate at intervals.

[0011] Furthermore, a collection chamber for collecting and storing aluminum scrap is formed inside the rotary furnace tube, and the air outlets are provided at both ends of the rotary furnace tube, with both air outlets communicating with the collection chamber.

[0012] Furthermore, the heating tube includes a sleeve and a metal tube inserted inside the melting tank. The sleeve is fitted over the heating wire, and the metal tube is fitted over the sleeve. The sleeve is made of glass fiber, the metal tube is made of copper, and the heating wire is a nickel-chromium alloy heating wire.

[0013] Furthermore, a sealed frame door is hinged to one side wall of the outer frame. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the aluminum scrap recycling and smelting furnace according to an embodiment of the present invention; Figure 2 This is a partial structural diagram of the furnace body of the aluminum scrap recycling and smelting furnace according to an embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of the mounting platform of the aluminum scrap recycling and smelting furnace according to an embodiment of the present invention; Figure 4 This is a cross-sectional structural schematic diagram of the heating tube of the aluminum scrap recycling and smelting furnace according to an embodiment of the present invention.

[0015] Explanation of reference numerals in the attached figures: 1. Outer frame; 11. Exhaust cover; 111. Exhaust hole; 12. Sealed frame door; 2. Rotary furnace tube; 21. Gas outlet; 3. First receiving seat; 4. Melting ladle; 5. Heating tube; 51. Heating wire; 52. Sleeve; 53. Metal tube body; 6. Mounting platform; 61. Control panel; 62. Lifting feet; 7. Stabilizing structure; 8. Second receiving seat. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit its scope of protection.

[0017] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] In this utility model, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0020] like Figures 1-4 As shown, an aluminum scrap recycling and smelting furnace according to one embodiment of the present invention includes a furnace body and a heating device. The furnace body includes an outer frame 1 and a rotary furnace tube 2 for collecting and storing aluminum scrap. A first receiving seat 3 is connected to the outer side wall of the outer frame 1. An auxiliary component is provided on the first receiving seat 3. The rotary furnace tube 2 is rotatably mounted on the auxiliary component. An air outlet 21 is provided on the rotary furnace tube 2. The heating device includes a smelting ladle 4 and heating components. The smelting ladle 4 is fixed inside the outer frame 1. A smelting chamber is formed inside the smelting ladle 4, surrounding the outside of the rotary furnace tube 2. Heating components are distributed at intervals around the outer periphery of the smelting chamber. The heating components include multiple heating tubes 5, and heating wires 51 are provided inside the heating tubes 5.

[0021] The aforementioned aluminum scrap recycling and smelting furnace directly heats the aluminum scrap within a sealed rotary furnace tube 2. The rotation continuously tumbles the scrap, ensuring uniform heating and effectively breaking down the surface oxide film. More importantly, the entire preheating and initial melting process is completed inside the rotary furnace tube 2 in an air-isolated environment. This minimizes contact between the aluminum scrap and oxygen before it reaches a molten state, reducing the main oxidation losses that occur during the preheating and feeding stages in traditional processes and fundamentally improving the metal recovery rate. Furthermore, the heating components act directly on the outer wall of the rotary furnace tube 2, eliminating the need for indirect heat transfer through the smelting ladle 4 or molten pool. This results in a very short heat transfer path and minimal heat loss. Additionally, the volatile gases generated from the decomposition of oil and moisture in the aluminum scrap within the rotary furnace tube 2 can be collected centrally through the exhaust port 21 and introduced into a purification device, effectively controlling the fugitive emissions of flue gas and harmful gases at the source.

[0022] like Figure 1 and Figure 3 As shown, in one embodiment, the aluminum scrap recycling smelting furnace also includes a mounting platform 6. A control panel 61 is connected to the side wall of the mounting platform 6, and lifting feet 62 are threadedly installed at the four corners of the bottom of the mounting platform 6. It can easily adapt to uneven installation ground, effectively avoiding equipment stress, abnormal wear, or operational failures caused by uneven foundation.

[0023] like Figure 1 and Figure 3As shown, in one embodiment, the outer frame 1 is detachably mounted on top of the mounting platform 6. The mounting platform 6 has a slot at its top and a stabilizing structure 7 inside. One end of the stabilizing structure 7 is rotatably connected to the bottom of the mounting platform 6, and the other end extends through the slot and is rotatably connected to the bottom of the outer frame 1. The rotary furnace tube 2 and the aluminum chips inside it generate dynamic unbalanced forces during rotation. The stabilizing structure 7 rigidly connects the outer frame 1, which supports the rotary furnace tube 2, to the solid bottom of the mounting platform 6, forming a highly stable triangular or box-shaped support system. This greatly enhances the overall rigidity and torsional resistance of the entire structure, effectively suppressing frame swaying or resonance caused by rotating loads, ensuring that the drive system of the rotary furnace tube 2 operates on a stable platform, thereby guaranteeing stable rotation speed and precise transmission.

[0024] The aforementioned stable structure 7 is existing technology, and its specific structure will not be described in detail here.

[0025] like Figure 1 and Figure 2 As shown, in one embodiment, the top of the outer frame 1 is covered with an exhaust cover 11, and the top of the exhaust cover 11 is provided with a plurality of exhaust holes 111 spaced apart. The cover of the exhaust cover 11 forms a relatively closed top space, which works in conjunction with the sealed cavity of the rotary furnace tube 2 to enable the volatile gases (such as oil pyrolysis products and water vapor) in the entire smelting area to be effectively collected and guided.

[0026] like Figure 1 and Figure 2 As shown, in one embodiment, a first support 3 is connected to one outer wall of the outer frame 1, and a second support 8 is connected to the other outer wall of the outer frame 1. An auxiliary assembly is also mounted on the second support 8. The two ends of the rotary furnace tube 2 are respectively rotatably mounted on the two auxiliary assemblies. The two ends of the rotary furnace tube 2 are each supported by an independent auxiliary assembly, forming a classic "simply supported beam" load-bearing structure. This dual-support point design evenly distributes the weight and rotational load of the furnace tube and its internal materials to both sides of the outer frame 1, fundamentally avoiding the huge bending moment and deflection deformation that may occur with single-point cantilever support.

[0027] In one embodiment, a drive motor is installed inside the first receiving seat 3, and a drive gear is fitted onto the output end of the drive motor. A driven gear is fitted onto the rotary furnace tube 2, and the drive gear and driven gear mesh with each other. A cooling fan facing the drive motor is also installed at the bottom of the first receiving seat 3. The drive motor generates a large amount of heat when outputting high torque for a long time, and the sealed space of the receiving seat is more prone to heat accumulation. The continuous operation of the cooling fan can effectively and quickly dissipate the heat generated by the friction of the drive motor and gears.

[0028] Specifically, the control panel 61 is used to control the operating status of the drive motor and the cooling fan respectively.

[0029] In one embodiment, the auxiliary assembly includes a snap-fit ​​plate and two auxiliary rollers for cooperating in supporting the rotation of the rotary furnace tube 2. The snap-fit ​​plate is threadedly fixed within a first receiving seat 3 or a second receiving seat 8, and the two auxiliary rollers are rotatably mounted on the snap-fit ​​plate at intervals. When the two auxiliary rollers are installed at intervals and contact the outer wall of the rotary furnace tube 2, they naturally form a stable "V-shaped" support surface. This not only provides sufficient radial constraint to prevent lateral movement of the rotary furnace tube 2, but also transforms sliding friction into rolling friction through the rotation of the auxiliary rollers, significantly reducing the frictional resistance during the rotation of the rotary furnace tube 2, thereby reducing drive energy consumption.

[0030] like Figure 1 and Figure 2 As shown, in one embodiment, a collection chamber for collecting and storing aluminum scrap is formed inside the rotary furnace tube 2. Both ends of the rotary furnace tube 2 are provided with air outlets 21, both of which are connected to the collection chamber. The collection chamber, as a clearly defined and relatively isolated space for containing and reacting aluminum scrap, combined with the sealed design at both ends (except for the air outlets 21), provides a low-oxygen or oxygen-deficient controlled atmosphere for the aluminum scrap preheating process.

[0031] like Figure 2 and Figure 4 As shown, in one embodiment, the heating tube 5 includes a sleeve 52 and a metal tube 53 inserted inside the melting pot 4. The sleeve 52 is fitted over the heating wire 51, and the metal tube 53 is fitted over the sleeve 52. The sleeve 52, fitted over the heating wire 51, serves to fix and protect the heating wire, and also optimizes the heat transfer path from the heating wire to the metal tube 53.

[0032] Preferably, the sleeve 52 is made of glass fiber, which provides good insulation and heat resistance, and the heating tube 5 has high heating efficiency.

[0033] Preferably, the metal tube 53 is a copper tube. Copper tubes have good thermal conductivity, ensuring high heat transfer efficiency of the heating tube 5.

[0034] Preferably, the heating wire 51 is a nickel-chromium alloy heating wire. Nickel-chromium alloy has high strength in high-temperature environments, is not easily deformed during long-term high-temperature operation, and its structure is not easily altered. In addition, nickel-chromium alloy has good electrical plasticity at room temperature, making repair after deformation relatively simple. Furthermore, nickel-chromium alloy heating wire has high emissivity, is non-magnetic, has good corrosion resistance, and a long service life.

[0035] like Figure 1As shown, in one embodiment, a sealed frame door 12 is hinged to one side wall of the outer frame 1. This facilitates observation of the working status of the rotary furnace tube 2 and the melting pot 4, necessary visual inspection of the interior, performance of minor maintenance work (such as cleaning local slag buildup), or rapid manual intervention in emergency situations.

[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An aluminum scrap recycling and smelting furnace, characterized in that, include: The furnace body includes an outer frame and a rotary furnace tube for collecting and storing aluminum chips. A first receiving seat is connected to the outer side wall of the outer frame. An auxiliary component is provided on the first receiving seat. The rotary furnace tube is rotatably mounted on the auxiliary component. An air outlet is provided on the rotary furnace tube. A heating device, comprising a melting ladle and heating components, wherein the melting ladle is fixed within the outer frame, and a melting chamber is formed within the melting ladle surrounding the rotary furnace tube, and heating components are spaced apart around the outer periphery of the melting chamber, the heating components comprising multiple heating tubes, and heating wires are provided inside the heating tubes.

2. The aluminum scrap recycling and smelting furnace according to claim 1, characterized in that, It also includes an installation platform, on which a control panel is connected, and at each of the four corners of the bottom of the installation platform, a lifting foot support is threaded on.

3. The aluminum scrap recycling and smelting furnace according to claim 2, characterized in that, The outer frame is detachably mounted on the top of the mounting platform. The top of the mounting platform has a slot. The mounting platform has a stabilizing structure inside. One end of the stabilizing structure is rotatably connected to the bottom of the mounting platform, and the other end of the stabilizing structure extends through the slot and is rotatably connected to the bottom of the outer frame.

4. The aluminum scrap recycling and smelting furnace according to claim 1, characterized in that, The top of the outer frame is covered with an exhaust cover, and the top of the exhaust cover has multiple exhaust holes spaced apart.

5. The aluminum scrap recycling and smelting furnace according to claim 1, characterized in that, The first support is connected to one side of the outer wall of the outer frame, and the second support is connected to the other side of the outer frame. The auxiliary component is also mounted on the second support. The two ends of the rotary furnace tube are respectively rotatably mounted on the two auxiliary components.

6. The aluminum scrap recycling and smelting furnace according to claim 1, characterized in that, A drive motor is installed inside the first receiving seat. A drive gear is fitted on the output end of the drive motor. A driven gear is fitted on the rotary furnace tube. The drive gear and the driven gear mesh with each other. A cooling fan facing the drive motor is also provided at the bottom of the first receiving seat.

7. The aluminum scrap recycling and smelting furnace according to claim 5, characterized in that, The auxiliary assembly includes a snap-fit ​​plate and two auxiliary rollers for cooperating to support the rotation of the rotary furnace tube. The snap-fit ​​plate is threadedly fixed in the first or second receiving seat, and the two auxiliary rollers are rotatably mounted on the snap-fit ​​plate at intervals.

8. The aluminum scrap recycling and smelting furnace according to claim 1, characterized in that, The rotary furnace tube has a collection chamber for collecting and storing aluminum scrap. Both ends of the rotary furnace tube are provided with air outlets, and both air outlets are connected to the collection chamber.

9. The aluminum scrap recycling and smelting furnace according to claim 1, characterized in that, The heating tube includes a sleeve and a metal tube inserted inside the melting tank. The sleeve is fitted over the heating wire, and the metal tube is fitted over the sleeve. The sleeve is made of glass fiber, the metal tube is made of copper, and the heating wire is a nickel-chromium alloy heating wire.

10. The aluminum scrap recycling and smelting furnace according to claim 1, characterized in that, A sealed frame door is hinged to one side wall of the outer frame.

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