A reflection type melting furnace for all kinds of aluminum alloy materials

Abstract

The application discloses a reflection type melting furnace for full variety aluminum alloy materials, and belongs to the technical field of smelting and melting processes, which comprises a main chamber, side wells, a light and thin material melting chamber and an aluminum scrap briquette melting chamber; the side wells are two, are arranged on the two sides of the main chamber, are communicated with the bottom of the main chamber, and are respectively communicated with the light and thin material melting chamber and the aluminum scrap briquette melting chamber; the light and thin material melting chamber and the aluminum scrap briquette melting chamber are respectively communicated with the main chamber, and are both provided with circulating pumps; the circulating pumps are used for introducing aluminum liquid in the main chamber into the light and thin material melting chamber and the aluminum scrap briquette melting chamber and forming vortexes; and a plurality of heat accumulating burners are arranged on the top of the main chamber. The melting furnace is suitable for melting materials with various properties, different melting modes are adopted for different materials, the heat accumulating burners are arranged on the top and are uniformly arranged to ensure the uniformity of the furnace temperature, energy is saved, and environmental protection emission index requirements are met.

Description

Technical Field

[0001] This invention belongs to the field of smelting and melting technology, and in particular relates to a reverberatory melting furnace for all types of aluminum alloy materials. Background Technology

[0002] The processing of aluminum products generates many materials, including thin, oily materials such as aluminum shavings, as well as crushed materials, slices, risers, and alloy ingots. Recycling and reusing these materials is undoubtedly an effective way to save energy, reduce consumption, and lower costs. Melting the materials is the primary method of recycling.

[0003] Currently, the main method for recycling materials is to use a melting furnace to melt the materials. The melting furnace has a certain depth of molten aluminum inside, and the high temperature of the molten aluminum is used to melt the materials. During the melting process, the materials are kept away from the flame as much as possible to reduce burn-off.

[0004] Existing reverberatory furnaces use side-mounted burners, resulting in poor temperature uniformity within the furnace. The furnace structure is simplistic, and feeding is typically done via forklifts at the furnace door. They lack specificity for melting different materials, particularly exhibiting low recovery rates and significant oxidation losses in the melting of aluminum chips and fragments.

[0005] Therefore, there is an urgent need for a new technical solution to address this problem. Summary of the Invention

[0006] In order to overcome the shortcomings of the existing technology, the present invention provides a reflective melting furnace for all types of aluminum alloy materials, which solves the problems of poor temperature uniformity in the furnace and lack of targeted melting for different materials.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: a reverberatory melting furnace for all types of aluminum alloy materials, comprising a main chamber, side shafts, a thin material melting chamber, and an aluminum scrap briquetting melting chamber; there are two side shafts, located on both sides of the main chamber, connected to the bottom of the main chamber, and respectively connected to the thin material melting chamber and the aluminum scrap briquetting melting chamber; the thin material melting chamber and the aluminum scrap briquetting melting chamber are respectively connected to the main chamber, and both the thin material melting chamber and the aluminum scrap briquetting melting chamber are equipped with circulation pumps; the circulation pumps are used to introduce molten aluminum from the main chamber into the thin material melting chamber and the aluminum scrap briquetting melting chamber to form a vortex; a plurality of regenerative burners are provided on the top of the main chamber.

[0008] Preferably, the aluminum chip briquette melting chamber is provided with a briquette plate and a vortex channel; the briquette plate includes an annular disc surface and a funnel-shaped channel; the funnel-shaped channel is located at the center of the annular disc surface and extends downward; the vortex channel is used to form a vortex on the annular disc surface by pumping out the molten aluminum from the circulating pump.

[0009] Preferably, a spiral dryer is provided at the top of the melting chamber for the thin material; the spiral dryer has a conical hollow shell structure, with its narrow end extending downwards into the interior of the melting chamber and communicating with it, and its wide end closed at the top; a flue is provided on the top surface of the main chamber; the flue is connected to a first flue gas blowing pipe and a second flue gas blowing pipe via a fan; the outlet end of the first flue gas blowing pipe extends vertically downwards into the top surface of the spiral dryer and is connected to a material conveying pipe; the material conveying pipe is connected to a material conveyor; and the outlet end of the second flue gas blowing pipe is tangentially connected to the side wall of the spiral dryer.

[0010] Preferably, both the first flue gas blowing pipe and the second flue gas blowing pipe are equipped with valves.

[0011] Through the above design scheme, the present invention can bring the following beneficial effects:

[0012] 1. The top of the main chamber is equipped with multiple regenerative burners, which are arranged at multiple points, so that the furnace gas and molten aluminum are heated evenly, the heat transfer efficiency is high, the temperature rises quickly, and the oxidation loss is reduced.

[0013] 2. Oily, light materials are preheated by spiral high-temperature flue gas, which increases the preheating stroke. The oil is fully evaporated and enters the furnace for full combustion to provide heat energy, reducing overall energy consumption and emissions, making it more environmentally friendly. At the same time, it avoids the additional recycling costs caused by substandard oil fumes.

[0014] 3. The spiral dryer generates a downward force, which causes the debris to quickly sink into the molten metal for heating and melting, reducing material loss and increasing efficiency.

[0015] 4. Valves are installed on both the first and second flue gas blowing pipes. By adjusting the valves and the flow rate of the fan, the impact force generated by the spiral dryer and the preheating stroke of the oily light material are controlled.

[0016] 5. Various materials such as aluminum shavings, aluminum shaving briquettes, scraps, waste wheel rims, aluminum ingots, and profiles are classified and disposed of in a highly targeted manner. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a reverberatory melting furnace for all types of aluminum alloy materials according to the present invention.

[0018] Figure 2 This is a top view of a reverberatory melting furnace for all types of aluminum alloy materials according to the present invention.

[0019] Figure 3 This is a BB cross-sectional view of a reverberatory melting furnace for all types of aluminum alloy materials according to the present invention.

[0020] Figure 4This is a partial top view of the aluminum chip briquetting melting chamber of a reverberatory melting furnace for all types of aluminum alloy materials according to the present invention.

[0021] Figure 5 This is a GG cross-sectional view of a reverberatory melting furnace for all types of aluminum alloy materials according to the present invention.

[0022] Figure 6 This is a schematic diagram of the structure of a thin material melting chamber in a reverberatory melting furnace for all types of aluminum alloy materials according to the present invention.

[0023] In the diagram, 1-main chamber, 11-regenerative burner, 12-slag removal door, 13-slag pushing door, 2-side shaft, 3-lightweight material melting chamber, 31-spiral dryer, 32-exhaust duct, 33-fan, 34-first flue gas blowing pipe, 35-second flue gas blowing pipe, 36-material conveying pipe, 37-material conveyor, 38-valve, 4-aluminum scrap briquetting melting chamber, 41-briquetting plate, 411-annular plate, 412-funnel-shaped channel, 42-vortex channel, 5-circulating pump, 6-feeding and slag removal chamber. Detailed Implementation

[0024] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] It should be noted that the terms "front and back," "up and down," and "left and right" mentioned in the text are merely simplified descriptions of positional relationships based on the accompanying drawings, and are not intended to limit the technical solution.

[0026] To more clearly illustrate the present invention, the following description, in conjunction with preferred embodiments, further clarifies the invention. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive, and users may make various changes to the following parameters without departing from the inventive mechanism and scope set forth in the claims. To avoid obscuring the essence of the invention, well-known methods and processes are not described in detail.

[0027] From the appendix Figures 1-6 The diagram shows a reverberatory melting furnace for all types of aluminum alloy materials, comprising a main chamber 1, side shafts 2, a thin material melting chamber 3, and an aluminum scrap briquetting melting chamber 4. Two side shafts 2 are located on either side of the main chamber 1 and are connected to the bottom of the main chamber 1. The two side shafts 2 are respectively connected to the thin material melting chamber 3 and the aluminum scrap briquetting melting chamber 4. The thin material melting chamber 3 and the aluminum scrap briquetting melting chamber 4 are respectively connected to the main chamber 1. Both the thin material melting chamber 3 and the aluminum scrap briquetting melting chamber 4 are equipped with circulation pumps 5. The circulation pumps 5 are used to introduce molten aluminum from the main chamber 1 into the thin material melting chamber 3 and the aluminum scrap briquetting melting chamber 4 to form a vortex. A plurality of regenerative burners 11 are installed on the top of the main chamber 1.

[0028] This reverberatory melting furnace can accommodate various materials. For example, crushed materials, slices, and aluminum chips are added through the thin material melting chamber 3; aluminum chip briquettes are added through the aluminum chip briquette melting chamber 4; materials are added through the side well via the riser and gating system; and alloy ingots are fed in through the furnace door. The feeding ratio can be adjusted according to the situation. This high-efficiency and energy-saving reverberatory melting furnace uses top-mounted regenerative combustion burners arranged at multiple points, ensuring uniform heating of the furnace gas and molten aluminum, high heat transfer efficiency, rapid temperature rise, and reduced oxidation loss. A circulating pump 5 is installed to introduce molten aluminum from the main chamber 1 into the thin material melting chamber 3 and the aluminum chip briquette melting chamber 4, forming a vortex for immersion melting and reducing burn-off. At the same time, the flow of molten aluminum promotes melting and temperature uniformity.

[0029] Furthermore, the aluminum chip briquetting melting chamber 4 is provided with a briquetting disc 41 and a vortex channel 42; the briquetting disc 41 includes an annular disc surface 411 and a funnel-shaped channel 412; the funnel-shaped channel 412 is located at the center of the annular disc surface 411 and extends downward; the vortex channel 42 is used to form a vortex on the annular disc surface 411 for the aluminum liquid pumped out by the circulating pump 5.

[0030] In practice, aluminum scrap briquettes are placed on an annular disk 411. Molten aluminum pumped by the circulating pump 5 forms a vortex on the annular disk 411 through an upwardly inclined vortex channel 42 that is tangentially connected to the annular disk 411. This heats and melts the aluminum scrap briquettes while simultaneously releasing the oil and water contained within them, thus eliminating the need for pre-drying. Once the aluminum scrap briquettes are melted to a smaller volume, they are carried by the molten aluminum into the funnel-shaped channel 412, flowing into the aluminum scrap briquettes melting chamber 4 for further melting, and then flowing into the main chamber 1 through the side well 2.

[0031] Furthermore, a spiral dryer 31 is provided on the top of the thin material melting chamber 3; the spiral dryer 31 has a conical hollow shell structure, with its narrow end extending downward into the interior of the thin material melting chamber 3 and communicating with it, and its wide end closed at the top surface; a flue duct 32 is provided on the top surface of the main chamber 1; the flue duct 32 is connected to a first flue gas blowing pipe 34 and a second flue gas blowing pipe 35 via a fan 33; the outlet end of the first flue gas blowing pipe 34 extends vertically downward into the top surface of the spiral dryer 31, and the outlet end of the first flue gas blowing pipe 34 is connected to a material conveying pipe 36; the material conveying pipe 36 is connected to a material conveyor 37; the outlet end of the second flue gas blowing pipe 35 is tangentially connected to the side wall of the spiral dryer 31.

[0032] In practice, a blower 33 blows flue gas exceeding 600°C from the main chamber 1 into the spiral dryer 31 via the first flue gas blowing pipe 34 and the second flue gas blowing pipe 35. The material conveyor 37 feeds fragmented material into the spiral dryer 31, where it is rapidly rotated and entrained, then drawn into the molten metal in the thin material melting chamber 3. The fragmented material is submerged in the vortex and enters the main chamber 1 through the side shaft 2 for heating and melting, completing the thin material feeding process. During this process, oily material is entrained by the spiral airflow formed by the high-temperature flue gas in the spiral dryer 31, and is thoroughly mixed with the high-temperature flue gas. The oil contained within is evaporated and fully combusted in the furnace to provide heat energy, significantly reducing energy consumption. This also avoids the oily material being submerged in the molten metal, preventing unburned oil fumes from failing to meet emission standards and avoiding the need for additional recovery devices, thus reducing costs. The method of rapidly submerging the fragmented material in the molten metal before heating and melting also reduces material loss.

[0033] Furthermore, valves 38 are installed on both the first flue gas blowing duct 34 and the second flue gas blowing duct 35. By adjusting the valves 38 and the flow rate of the fan 33, the impact force generated by the spiral dryer 31 and the preheating stroke of the oily, light material are controlled. Increasing the flow rate of the valve in the first flue gas blowing duct 34 increases the impact force generated by the spiral dryer 31; decreasing the flow rate of the valve in the first flue gas blowing duct 34 while increasing the flow rate of the valve in the second flue gas blowing duct 35 increases the preheating stroke of the oily, light material. These adjustments can be made according to the actual needs such as the oil content and particle size of the oily, light material.

[0034] Furthermore, to facilitate operation, slag removal doors 12 and slag pushing doors 13 are provided at both ends of the main chamber 1.

[0035] Furthermore, in order to reduce heat dissipation and greatly reduce the amount of slag removal work, the top of the side well 2 is provided with a feeding and slag removal chamber 6.

[0036] This invention is applicable to melting materials of various properties. Different melting methods are employed for different materials. A main chamber, side wells, circulating pumps, vortex wells, and briquetting plate structure are arranged on the same melting furnace to achieve the melting of multiple materials. The regenerative burners are uniformly arranged at the top, ensuring uniform furnace temperature while saving energy and meeting environmental emission standards.

[0037] Obviously, the embodiments described above are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A reverberatory melting furnace for all types of aluminum alloy materials, characterized in that: It includes a main chamber (1), side wells (2), a thin material melting chamber (3), and an aluminum scrap briquette melting chamber (4); there are two side wells (2), which are located on both sides of the main chamber (1) and are connected to the bottom of the main chamber (1). The two side wells (2) are respectively connected to the thin material melting chamber (3) and the aluminum scrap briquette melting chamber (4); the thin material melting chamber (3) and the aluminum scrap briquette melting chamber (4) are respectively connected to the main chamber (1), and both the thin material melting chamber (3) and the aluminum scrap briquette melting chamber (4) are equipped with circulation pumps (5); the circulation pumps (5) are used to introduce the molten aluminum in the main chamber (1) into the thin material melting chamber (3) and the aluminum scrap briquette melting chamber (4) and form a vortex; The top of the main chamber (1) is provided with a plurality of regenerative burners (11). A spiral dryer (31) is provided on the top of the thin material melting chamber (3); the spiral dryer (31) is a conical hollow shell structure, the narrow end of the spiral dryer (31) extends downward into the interior of the thin material melting chamber (3) and communicates with the thin material melting chamber (3), and the top surface of the wide end of the spiral dryer (31) is closed. The top surface of the main chamber (1) is provided with a flue (32); the flue (32) is connected to a first flue gas blowing pipe (34) and a second flue gas blowing pipe (35) via a fan (33); the outlet end of the first flue gas blowing pipe (34) extends vertically downward into the top surface of the spiral dryer (31), and the outlet end of the first flue gas blowing pipe (34) is connected to the material conveying pipe (36); the material conveying pipe (36) is connected to the material conveyor (37); the outlet end of the second flue gas blowing pipe (35) is tangentially connected to the side wall of the spiral dryer (31).

2. The reverberatory melting furnace for all types of aluminum alloy materials according to claim 1, characterized in that: The aluminum chip briquette melting chamber (4) is provided with a briquette plate (41) and a vortex channel (42); the briquette plate (41) includes an annular plate surface (411) and a funnel-shaped channel (412); the funnel-shaped channel (412) is located at the center of the annular plate surface (411) and extends downward; the vortex channel (42) is used to form a vortex on the annular plate surface (411) for the aluminum liquid pumped out by the circulating pump (5).

3. The reverberatory melting furnace for all types of aluminum alloy materials according to claim 1, characterized in that: Valves (38) are provided on both the first flue gas blowing pipe (34) and the second flue gas blowing pipe (35).

4. The reverberatory melting furnace for all types of aluminum alloy materials according to claim 1, characterized in that: The main chamber (1) is equipped with a slag removal door (12) and a slag pushing door (13) at both ends.

5. The reverberatory melting furnace for all types of aluminum alloy materials according to claim 1, characterized in that: The top of the side well (2) is provided with a feeding and slag removal chamber (6).

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