Split type double-chamber furnace with large molten metal circulation volume

Abstract

The utility model relates to the technical field of double-chamber furnaces, in particular to a split type double-chamber furnace with large molten metal circulation volume, which comprises a heating chamber, a feeding chamber, a molten metal circulation component and a flue gas channel, the flue gas channel is arranged between the heating chamber and the feeding chamber, one end of the flue gas channel is connected with the heating chamber, and the other end of the flue gas channel is connected with the feeding chamber; the molten metal circulating assembly comprises a molten metal circulating channel and an electromagnetic stirrer for pushing molten metal to circularly flow; the molten metal circulation channel is arranged between the heating chamber and the feeding chamber, one end of the molten metal circulation channel is connected with the heating chamber, and the other end of the molten metal circulation channel is connected with the feeding chamber; and the electromagnetic stirrer is arranged on the outer wall surface of the molten metal circulating channel. The aluminum scrap smelting device can solve the problem of low aluminum scrap smelting efficiency caused by insufficient aluminum liquid circulation power in the aluminum liquid circulation channel in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of double-chamber furnaces, in particular to a split double-chamber furnace with a large metal melt circulation volume. Background Art

[0002] The industry uses dual-chamber furnaces to melt and regenerate scrap aluminum into metallic aluminum, enabling scrap aluminum recycling and improving economic efficiency. A dual-chamber furnace consists of a heating chamber and a charging chamber, connected by a molten aluminum circulation channel and a flue gas channel. Scrap aluminum is added to the charging chamber, where it burns in the heating chamber to generate high-temperature flue gas. Some of this high-temperature flue gas flows through the flue gas channel into the charging chamber to heat the scrap aluminum, while another portion heats the molten aluminum in the molten aluminum circulation channel. The heated molten aluminum then flows through the molten aluminum circulation channel into the charging chamber to melt the scrap aluminum, achieving scrap aluminum recycling.

[0003] However, early dual-chamber furnaces used a partition wall to separate the heating chamber from the charging chamber, with molten aluminum circulation channels and flue gas channels built into the wall. Given that the heating chamber's temperature is higher than the charging chamber's, this resulted in different heating conditions on both sides of the partition wall. Furthermore, the partition wall was also subject to the impact of molten aluminum and flue gas, significantly reducing its service life.

[0004] In recent years, the industry has explored split-chamber furnaces, eliminating the partition wall and separating the heating chamber from the charging chamber. The aluminum liquid circulation channel and flue gas duct are located between the two chambers, connecting them. While this solves the problem of the partition wall, it lacks the power to circulate the aluminum liquid in the circulation channel, resulting in reduced scrap aluminum smelting efficiency.

[0005] In summary, a split double-chamber furnace with a large molten metal circulation volume is needed to solve the problem in the prior art of low scrap aluminum smelting efficiency due to insufficient aluminum liquid circulation power in the aluminum liquid circulation channel. Utility Model Content

[0006] The purpose of this utility model is to provide a split double-chamber furnace with a large circulation volume of molten metal (including molten aluminum, molten zinc and molten copper, etc.). The specific technical solution is as follows:

[0007] A split double-chamber furnace with a large molten metal circulation volume, comprising a heating chamber, a charging chamber, a molten metal circulation component and a flue gas channel;

[0008] The flue gas channel is arranged between the heating chamber and the feeding chamber, and one end of the flue gas channel is connected to the heating chamber, and the other end is connected to the feeding chamber;

[0009] The molten metal circulation component includes a molten metal circulation channel and an electromagnetic stirrer for promoting the circulation of the molten metal; the molten metal circulation channel is arranged between the heating chamber and the feeding chamber, and one end of the molten metal circulation channel is connected to the heating chamber, and the other end is connected to the feeding chamber; the electromagnetic stirrer is arranged on the outer wall surface of the molten metal circulation channel.

[0010] Optionally, a magnetic window is provided on the outer wall surface in the longitudinal direction of the molten metal circulation channel, the electromagnetic stirrer is adapted to be arranged to fit the magnetic window, and a ventilation gap is provided between the two.

[0011] Optionally, the electromagnetic stirrer is arranged along the outer wall surface of the molten metal circulation channel in the length direction, and a plurality of magnetic pole protrusions are provided on the electromagnetic stirrer; a plurality of grooves are provided on the magnetic window of the molten metal circulation channel, and the grooves are adapted to the magnetic pole protrusions one by one.

[0012] Optionally, a plurality of groups of reinforcing rib plate assemblies are arranged at intervals on the magnetic window, and a groove is formed between two adjacent reinforcing rib plate assemblies; the depth of the groove is 30-300 mm.

[0013] Optionally, the height of the magnetic pole protrusion above the main cover of the electromagnetic stirrer is 30-300 mm.

[0014] Optionally, a cooling air duct connected to the groove is provided on each of the reinforcing rib plate assemblies.

[0015] Optionally, end plates are respectively provided at both ends of the magnetic window in the length direction; and ventilation holes connected to the cooling air duct are provided on both end plates.

[0016] Optionally, the molten metal circulation channel includes a first channel and a second channel; one end of the first channel is connected to the heating chamber, and the other end is connected to the feeding chamber; one end of the second channel is connected to the feeding chamber, and the other end is connected to the heating chamber; the first channel and the second channel both include linear channels.

[0017] Optionally, the first channel and the second channel in the molten metal circulation channel are both linear channels; and the electromagnetic stirrer is installed on the first channel and / or the second channel.

[0018] Optionally, a first insulation layer is provided on the inner wall of the molten metal circulation channel; a second insulation layer is provided on the inner wall of the feeding chamber; and a third insulation layer is provided on the inner wall of the heating chamber.

[0019] The application of the technical solution of the utility model has at least the following beneficial effects:

[0020] (1) The utility model provides a split double-chamber furnace with a large molten metal circulation volume. Scrap aluminum is added to the charging chamber, and high-temperature flue gas is generated by combustion in the heating chamber. A portion of the high-temperature flue gas flows into the charging chamber through the flue gas channel to heat the scrap aluminum, and another portion of the high-temperature flue gas heats the molten metal (such as molten aluminum) in the molten metal circulation channel. The heated molten metal (such as molten aluminum) is accelerated to circulate through the molten metal circulation channel under the action of the magnetic force provided by the electromagnetic stirrer to flow into the charging chamber to melt the scrap aluminum, thereby improving the scrap aluminum smelting efficiency and realizing the recycling of scrap aluminum.

[0021] (2) The electromagnetic stirrer and the magnetic window in the present invention are adapted to facilitate the electromagnetic stirrer to be close to the molten metal, thereby increasing the magnetic force on the molten metal, accelerating the circulation of the molten metal (such as molten aluminum), and improving the efficiency of scrap aluminum smelting. A ventilation gap is provided between the electromagnetic stirrer and the magnetic window to ensure that the magnetic force of the electromagnetic stirrer on the molten metal is not reduced by heat.

[0022] (3) In the present invention, a plurality of magnetic protrusions and a plurality of grooves are matched with each other between the electromagnetic stirrer and the outer wall surface of the molten metal circulation channel. On the one hand, it is convenient to provide continuous propulsion power to the molten metal and accelerate the circulation of the molten metal; on the other hand, it is convenient for the electromagnetic stirrer to be close to the molten metal, increase the magnetic force on the molten metal, accelerate the circulation of the molten metal (such as molten aluminum), and improve the efficiency of scrap aluminum smelting.

[0023] (4) The utility model arranges multiple groups of reinforcing rib plate assemblies at intervals on the magnetic window to enhance the strength of the magnetic window and improve operational safety; a cooling air duct connected to the groove is provided on each reinforcing rib plate assembly to facilitate improving the heat dissipation effect of the electromagnetic stirrer, ensuring that the magnetic force of the electromagnetic stirrer on the molten metal is not reduced by heat, and helping to extend the service life of the electromagnetic stirrer.

[0024] (5) The utility model provides end plates at both ends of the length direction of the magnetic window, and ventilation holes connected to the cooling air duct are provided on both end plates, which can further improve the heat dissipation effect of the electromagnetic stirrer.

[0025] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0027] Figure 1This is a schematic diagram of the three-dimensional structure of a split double-chamber furnace with a large molten metal circulation volume in an embodiment of the present invention;

[0028] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of a split double-chamber furnace with a large metal melt circulation capacity from another perspective;

[0029] Figure 3 yes Figure 1 A top view of

[0030] Figure 4 yes Figure 3 A cross-sectional view of the molten metal circulation channel (the figure also shows an electromagnetic stirrer for molten metal circulation);

[0031] Among them, 1. Heating chamber, 2. Feeding chamber, 3. Metal melt circulation channel, 3.1. Groove, 3.2. Reinforcement rib assembly, 3.3. End plate, 3.4. First insulation layer, 4. Flue gas channel, 5. Electromagnetic stirrer, 5.1. Magnetic pole protrusion, 5.2. Main body cover. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0033] Example:

[0034] See also Figures 1-4 , a split double-chamber furnace with a large molten metal circulation volume, comprising a heating chamber 1, a charging chamber 2, a molten metal circulation component and a flue gas channel 4;

[0035] The flue gas channel 4 is provided between the heating chamber 1 and the feeding chamber 2, and one end of the flue gas channel 4 is connected to the heating chamber 1, and the other end is connected to the feeding chamber 2;

[0036] The molten metal circulation component includes a molten metal circulation channel 3 and an electromagnetic stirrer 5 for promoting the circulation of the molten metal; the molten metal circulation channel 3 is arranged between the heating chamber 1 and the feeding chamber 2, and one end of the molten metal circulation channel 3 is connected to the heating chamber 1, and the other end is connected to the feeding chamber 2; the electromagnetic stirrer is arranged on the outer wall surface of the molten metal circulation channel 3, and is used to provide circulation power for the molten metal circulation in the molten metal circulation channel 3.

[0037] A magnetic window is provided on the outer wall surface in the longitudinal direction of the molten metal circulation channel 3. The electromagnetic stirrer 5 is narrow and long and is adapted to be arranged with the magnetic window. A ventilation gap is provided between the electromagnetic stirrer 5 and the magnetic window. This is because the molten metal in the molten metal circulation channel 3 is high-temperature molten metal, so that the outer wall of the molten metal circulation channel 3 also has a certain amount of heat. Under the action of heat, the electromagnetic stirrer 5 will reduce the magnetic force on the molten metal. Therefore, in this embodiment, the ventilation gap is provided to reduce the temperature of the outer wall of the molten metal circulation channel 3, ensuring that the magnetic force of the electromagnetic stirrer 5 on the molten metal is not reduced by heat.

[0038] The electromagnetic stirrer 5 is arranged along the outer wall surface of the molten metal circulation channel 3 in the length direction, and a plurality of magnetic pole protrusions 5.1 are arranged on the electromagnetic stirrer 5; a plurality of grooves 3.1 are arranged on the magnetic window of the molten metal circulation channel 3, and the grooves 3.1 are adapted to the magnetic pole protrusions 5.1 one by one. On the one hand, it is convenient to provide continuous propulsion power to the molten metal and accelerate the circulation of the molten metal; on the other hand, it is convenient for the electromagnetic stirrer 5 to approach the molten metal, increase the magnetic force on the molten metal, accelerate the circulation of the molten metal (such as molten aluminum), and improve the efficiency of scrap aluminum smelting.

[0039] Multiple groups of reinforcing rib assemblies 3.2 are also spaced apart on the magnetic window, and a groove 3.1 is formed between two adjacent reinforcing rib assemblies 3.2; the depth of the groove 3.1 is 30-300mm. Specifically, each reinforcing rib assembly 3.2 includes a first reinforcing rib plate, a second reinforcing rib plate, and a third reinforcing rib plate; the first reinforcing rib plate and the second reinforcing rib plate are both symmetrically arranged on the magnetic window facing each other along the depth direction of the groove 3.1; the third reinforcing rib plate is arranged to cover the end of the first reinforcing rib plate and the second reinforcing rib plate away from the magnetic window, forming the reinforcing rib plate assembly 3.2, which is used to enhance the strength of the magnetic window and improve operational safety.

[0040] The height of the magnetic pole protrusion 5.1 above the main cover 5.2 of the electromagnetic stirrer 5 is 30-300 mm, which is convenient for adapting to the groove 3.1, so that the electromagnetic stirrer 5 is close to the molten metal, increasing the magnetic force on the molten metal, accelerating the circulation of the molten metal (such as molten aluminum), and improving the efficiency of scrap aluminum smelting.

[0041] A mobile carrier with a lifting mechanism is provided at the bottom of the electromagnetic stirrer 5 to facilitate the lifting and movement of the electromagnetic stirrer 5. When the electromagnetic stirrer 5 is required to operate, the mobile carrier first moves the electromagnetic stirrer 5 below the magnetic window. The lifting mechanism then raises the electromagnetic stirrer 5 toward the magnetic window until the magnetic pole protrusions 5.1 on the electromagnetic stirrer 5 enter the grooves 3.1. Finally, the electromagnetic stirrer 5 is activated to accelerate the circulation of the molten metal (e.g., molten aluminum) and improve the efficiency of scrap aluminum smelting.

[0042] A cooling air duct connected to the groove is provided on each of the reinforcing rib plate assemblies 3.2 to improve the heat dissipation effect of the electromagnetic stirrer 5, ensure that the magnetic force of the electromagnetic stirrer 5 on the molten metal is not reduced by heat, and help to extend the service life of the electromagnetic stirrer 5.

[0043] End plates 3.3 are respectively provided at both ends of the magnetic window in the longitudinal direction; ventilation holes communicating with the cooling air duct are provided on both end plates 3.3, which can further improve the heat dissipation effect of the electromagnetic stirrer 5.

[0044] The ventilation holes and the cooling air duct are both connected to a cooling system (such as a fan) to provide cooling protection for the electromagnetic stirrer 5 , reduce the effect of high temperature on the reduction of magnetic force, and help extend the service life of the electromagnetic stirrer 5 .

[0045] The molten metal circulation channel 3 includes a first channel and a second channel; one end of the first channel is connected to the heating chamber 1, and the other end is connected to the feeding chamber 2; one end of the second channel is connected to the feeding chamber 2, and the other end is connected to the heating chamber 1; the molten metal circulation channel 3 realizes molten metal circulation through the first channel and the second channel.

[0046] The first channel and the second channel in the molten metal circulation channel 3 are both linear channels, which are convenient for installing the electromagnetic stirrer 5; the electromagnetic stirrer 5 is installed on the first channel and / or the second channel.

[0047] A first insulation layer 3.4 (specifically, insulation bricks) is provided on the inner wall of the molten metal circulation channel 3 to reduce heat loss from the molten metal. A second insulation layer (specifically, insulation bricks) is provided on the inner wall of the feeding chamber 2 to reduce heat loss from the molten metal and high-temperature flue gas. A third insulation layer (specifically, insulation bricks) is provided on the inner wall of the heating chamber 1 to reduce heat loss from the high-temperature flue gas.

[0048] A first temperature measuring hole (not shown in the figure) and a first pressure measuring hole (not shown in the figure) are provided on the heating chamber 1 to facilitate the installation of a temperature sensor and a pressure sensor, thereby realizing real-time monitoring and adjustment of the temperature and pressure in the heating chamber 1 .

[0049] A second temperature measuring hole (not shown in the figure) and a second pressure measuring hole (not shown in the figure) are provided on the feeding chamber 2 to facilitate the installation of a temperature sensor and a pressure sensor, thereby realizing real-time monitoring and adjustment of the temperature and pressure in the feeding chamber 2.

[0050] The operating principle of the split double-chamber furnace with a large metal melt circulation volume is as follows:

[0051] Scrap aluminum is added to the feeding chamber 2, and high-temperature flue gas is generated by combustion in the heating chamber 1. A part of the high-temperature flue gas flows into the feeding chamber 2 through the flue gas channel 4 to heat the scrap aluminum, and the other part of the high-temperature flue gas heats the molten metal in the molten metal circulation channel 3. The heated molten metal (such as molten aluminum) is accelerated and circulated through the molten metal circulation channel 3 under the action of the magnetic force provided by the electromagnetic stirrer 5 to flow into the feeding chamber 2 to melt the scrap aluminum, thereby improving the scrap aluminum smelting efficiency and realizing the recycling of scrap aluminum.

[0052] Among them, multiple magnetic pole protrusions 5.1 and multiple grooves 3.1 are adapted one by one between the electromagnetic stirrer 5 and the outer wall surface of the molten metal circulation channel 3, which makes it easier for the electromagnetic stirrer 5 to approach the molten metal, increase the magnetic force on the molten metal, accelerate the circulation of the molten metal (such as molten aluminum), and improve the efficiency of scrap aluminum smelting.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A split double-chamber furnace with a large molten metal circulation volume, characterized in that: It comprises a heating chamber (1), a feeding chamber (2), a molten metal circulation component and a flue gas channel (4); The smoke channel (4) is arranged between the heating chamber (1) and the feeding chamber (2), and one end of the smoke channel (4) is connected to the heating chamber (1), and the other end is connected to the feeding chamber (2); The molten metal circulation component comprises a molten metal circulation channel (3) and an electromagnetic stirrer (5) for promoting the circulation of the molten metal; the molten metal circulation channel (3) is arranged between the heating chamber (1) and the feeding chamber (2), and one end of the molten metal circulation channel (3) is connected to the heating chamber (1), and the other end is connected to the feeding chamber (2); the electromagnetic stirrer (5) is arranged on the outer wall surface of the molten metal circulation channel (3).

2. The split double-chamber furnace with a large molten metal circulation volume according to claim 1, characterized in that: A magnetic window is provided on the outer wall surface of the molten metal circulation channel (3) in the longitudinal direction, the electromagnetic stirrer (5) is adapted to be arranged with the magnetic window, and a ventilation gap is provided between the two.

3. The split double-chamber furnace with a large molten metal circulation volume according to claim 2, characterized in that: The electromagnetic stirrer (5) is arranged along the outer wall surface of the molten metal circulation channel (3) in the longitudinal direction, and a plurality of magnetic pole protrusions (5.1) are arranged on the electromagnetic stirrer (5); a plurality of grooves (3.1) are arranged on the magnetic window of the molten metal circulation channel (3), and the grooves (3.1) are adapted to the magnetic pole protrusions (5.1) one by one.

4. The split double-chamber furnace with a large molten metal circulation volume according to claim 3, characterized in that: A plurality of groups of reinforcing rib plate assemblies (3.2) are arranged at intervals on the magnetic window, and a groove (3.1) is formed between two adjacent reinforcing rib plate assemblies (3.2); the depth of the groove (3.1) is 30-300 mm.

5. The split double-chamber furnace with a large molten metal circulation volume according to claim 4, characterized in that: The height of the magnetic pole protrusion (5.1) above the main body cover (5.2) of the electromagnetic stirrer (5) is 30-300 mm.

6. The split double-chamber furnace with a large molten metal circulation capacity according to claim 4, characterized in that: A cooling air duct communicating with the groove is provided on each of the reinforcing rib plate assemblies (3.2).

7. The split double-chamber furnace with a large molten metal circulation capacity according to claim 6, characterized in that: End plates (3.3) are respectively provided at both ends of the magnetic window in the longitudinal direction; ventilation holes communicating with the cooling air duct are provided on both end plates (3.3); The ventilation holes and the cooling air ducts are both connected to a cooling system.

8. The split double-chamber furnace with a large molten metal circulation capacity according to any one of claims 1 to 7, characterized in that: The molten metal circulation channel (3) comprises a first channel and a second channel; one end of the first channel is connected to the heating chamber (1), and the other end is connected to the feeding chamber (2); one end of the second channel is connected to the feeding chamber (2), and the other end is connected to the heating chamber (1); the first channel and the second channel both comprise linear channels.

9. The split double-chamber furnace with a large molten metal circulation capacity according to claim 8, characterized in that: The first channel and the second channel in the molten metal circulation channel (3) are both linear channels; and the electromagnetic stirrer (5) is installed on the first channel and / or the second channel.

10. The split double-chamber furnace with a large molten metal circulation capacity according to claim 8, characterized in that: A first thermal insulation layer (3.4) is provided on the inner wall of the molten metal circulation channel (3); a second thermal insulation layer is provided on the inner wall of the feeding chamber (2); and a third thermal insulation layer is provided on the inner wall of the heating chamber (1).

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