Detachable intermediate frequency furnace

Abstract

The utility model relates to a detachable intermediate frequency furnace which comprises a furnace body, a crucible is arranged in the furnace body, an induction coil is arranged between the crucible and the furnace body, a jacket is arranged between the induction coil and the crucible, and graphite powder is filled between the jacket and the crucible. The top of the jacket and the top of the crucible are connected with a connecting plate installed on the top of the furnace body, gaps between the jacket and the connecting plate and between the crucible and the connecting plate are sealed through refractory materials, and an opening in the top of the connecting plate corresponds to an opening of the crucible. The jacket is arranged between the induction coil and the crucible, the graphite powder is filled between the jacket and the crucible, and then the jacket and the crucible are hermetically connected with the existing connecting plate, so that when the crucible needs to be replaced, the crucible and the graphite powder can be taken out, a new crucible is replaced, and the graphite powder is filled; the whole dismounting and mounting process is simple and efficient, destructive dismounting is not needed any more, the labor intensity is low, and the working environment is good.

Description

Technical Field

[0001] The utility model relates to the technical field of medium frequency furnace equipment, in particular to a detachable medium frequency furnace. Background Art

[0002] The medium frequency furnace is a common equipment used for metal smelting. Compared with other casting equipment, it not only has high thermal efficiency and less environmental pollution, but also can accurately control the temperature and composition of the molten metal, so it is widely used. Figure 4 As shown, the furnace body 1 includes a crucible 3, an induction coil 2 is arranged between the crucible 3 and the furnace body 1, and is filled with refractory quartz sand 4. During production, the quartz sand 4 between the crucible 3 and the furnace body 1 is rammed and sintered, so that the crucible 3, the induction coil 3 and the inner lining of the furnace body 1 form a whole, so as to ensure that the crucible will not slip out and cause an accident when the medium frequency furnace is used to pour the smelted metal.

[0003] However, when the oxidation corrosion of the inner wall of the crucible cannot meet the smelting safety requirements, this design requires the use of mechanical tools such as electric hammers to destroy the overall structure, so that the crucible can be separated from the furnace lining before it can be taken out. After replacement, the furnace needs to be rebuilt, which greatly increases the difficulty of disassembly and assembly, and the labor intensity is high. In addition, destructive disassembly and assembly is very likely to damage the induction coil. Once damaged, it will not be able to produce the electromagnetic induction heating effect to melt the metal. Therefore, it is necessary to provide a medium frequency furnace that is easy to load and unload. Utility Model Content

[0004] The utility model provides a detachable intermediate frequency furnace.

[0005] The specific technical scheme of the utility model is: a detachable medium frequency furnace, comprising a furnace body, a crucible is arranged in the furnace body, an induction coil is arranged between the crucible and the furnace body, a jacket is arranged between the induction coil and the crucible, graphite powder is filled between the jacket and the crucible, the top of the jacket and the crucible are connected to a connecting plate installed on the top of the furnace body, the gap between the jacket and the crucible and the connecting plate is sealed with a refractory material, and the top opening of the connecting plate corresponds to the opening of the crucible.

[0006] Further, preferably, the jacket is a silicon carbide jacket.

[0007] Further, preferably, the crucible is a graphite crucible.

[0008] Further, preferably, the graphite powder includes fine-grained graphite powder and coarse-grained graphite powder, wherein the fine-grained graphite powder is filled at the bottom between the jacket and the crucible and below 3 / 4 of the height, and the coarse-grained graphite powder is filled above 3 / 4 of the height between the jacket and the crucible.

[0009] Further, preferably, the connecting plate is composed of two joinable aluminum plates.

[0010] The beneficial effects of the utility model are:

[0011] (1) The detachable medium frequency furnace is provided with a jacket between the induction coil and the crucible, graphite powder is filled between the jacket and the crucible, and then the jacket and the crucible are sealed and connected with the existing connecting plate. When the crucible needs to be replaced, the crucible and the graphite powder can be taken out by simply removing the connecting plate, and a new crucible and the graphite powder can be replaced. After the connecting plate is installed and sealed, the furnace can be put into use. The whole disassembly and assembly process is simple and efficient, no destructive disassembly is required, the labor intensity is low, and the working environment is friendly.

[0012] (2) The jacket separates the induction coil and the crucible, which prevents the induction coil from being damaged and helps reduce spare parts costs.

[0013] (3) The graphite powder filled and the graphite crucible itself have magnetic domains. The graphite powder filled has better thermal conductivity than the original quartz sand, which can increase the smelting temperature, enhance the fluidity of the metal in the high-temperature molten pool, accelerate the metal sedimentation, reduce the entrainment of metal in the smelting slag, and improve the recovery rate of valuable metals. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of a detachable intermediate frequency furnace according to an embodiment of the present invention;

[0015] Figure 2 A central cross-sectional view of a detachable intermediate frequency furnace according to an embodiment of the present invention;

[0016] Figure 3 for Figure 1 A top view of the middle connecting plate;

[0017] Figure 4 This is the central cross-section of the existing medium frequency furnace;

[0018] In the figure: 1-furnace body, 2-induction coil, 3-crucible, 4-quartz sand, 5-furnace nozzle, 6-connecting plate, 7-jacket, 8-graphite powder, 801-fine-grained graphite powder, 802-coarse-grained graphite powder. DETAILED DESCRIPTION

[0019] In order to make the technical problems and technical solutions solved by the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figure 1 Figure 2 As shown, a detachable medium frequency furnace includes a furnace body 1, a crucible 3 is arranged in the furnace body 1, an induction coil 2 is arranged between the crucible 3 and the furnace body 1, a connecting plate 9 is installed on the top of the furnace body 1 (the connecting plate 9 is installed on the top of the furnace body 1 through high-temperature resistant bolts between the furnace body 1 and the induction coil 2), and an opening is opened on the connecting plate 9 for a furnace nozzle 5 to extend to the outside. These are all existing technologies. A jacket 7 is provided between the induction coil 2 and the crucible 3, and the jacket 7 is made of silicon carbide; graphite powder 8 is filled between the jacket 7 and the crucible 3 (graphite crucible), and the graphite powder 8 includes fine-grained graphite powder 801 and coarse-grained graphite powder 802, wherein the fine-grained graphite powder 801 is filled at the bottom between the jacket 7 and the crucible 3 and below 3 / 4 of the height, and the coarse-grained graphite powder 802 is filled at more than 3 / 4 of the height between the jacket 7 and the crucible 3; the top of the jacket 7 and the crucible 3 are connected to a connecting plate 9 installed on the top of the furnace body 1, and the gap between the jacket 7 and the crucible 3 and the connecting plate 9 is sealed with a refractory material, and the top opening of the connecting plate 9 corresponds to the opening of the crucible 3.

[0023] When in use, a jacket 7 is placed inside the induction coil 2, and fine-grained graphite powder 801 is filled at the bottom of the jacket 7. Then, the crucible 3 is placed in the jacket 7, and 3 / 4 of the height of the gap between the jacket 7 and the crucible 3 is filled with fine-grained graphite powder 801, and the remaining 1 / 4 of the height is filled with coarse-grained graphite powder 802 (the coarse-grained graphite powder is used in this part to facilitate the sealing treatment with the connecting plate 9). Subsequently, a nozzle brick with a nozzle 5 is installed on the opening between the induction coil 2 and the furnace body 1 for the nozzle to extend out, and finally, the connecting plate 9 is installed on the furnace body 1, and the connecting plate 9 covers the jacket 7, the crucible 3, and the nozzle brick. The connecting plate 9 is connected and fixed by the high-temperature resistant bolts preset in the furnace body 1, so that the above structure is fixed to the furnace body 1 as a whole. At the same time, the connection position of the connecting plate 9 with the jacket 7 and the crucible 3, and the connection position of the nozzle brick with the connecting plate 9 are sealed with refractory materials to ensure that the molten metal will not penetrate into each interlayer during the smelting process and when the molten metal is poured.

[0024] When the inner wall of the crucible 3 is oxidized and corroded after being used for a period of time and cannot meet the safety requirements of smelting, the crucible 3 and the graphite powder 8 can be taken out by simply removing the connecting plate 9, and a new crucible and graphite powder can be replaced, and the connecting plate can be installed and sealed before being put into use. The whole disassembly and assembly process is simple and efficient, no destructive disassembly is required, the labor intensity is low, and the working environment is friendly. In addition, the jacket separates the induction coil from the crucible, and there is no possibility of damaging the induction coil, which is conducive to reducing the cost of spare parts.

[0025] In addition, the graphite powder and the graphite crucible itself have magnetic domains. The graphite powder has better thermal conductivity than the original quartz sand, which can increase the smelting temperature, improve the fluidity of the metal in the high-temperature molten pool, accelerate the metal sedimentation, reduce the entrainment of metal in the smelting slag, and increase the recovery rate of valuable metals. Coarse and fine particle graphite powder is cheap and easy to obtain, which can also reduce the cost of furnace construction.

[0026] Preferably, if Figure 3 As shown, the connecting plate 9 is composed of two aluminum plates that can be spliced ​​together, which is easy to disassemble.

[0027] The present invention is described in detail above through specific and preferred embodiments, but those skilled in the art should understand that the present invention is not limited to the embodiments described above, and any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A detachable medium frequency furnace, comprising a furnace body (1), a crucible (3) being arranged inside the furnace body (1), an induction coil (2) being arranged between the crucible (3) and the furnace body (1), characterized in that: A jacket (7) is provided between the induction coil (2) and the crucible (3), and graphite powder (8) is filled between the jacket (7) and the crucible (3). The tops of the jacket (7) and the crucible (3) are connected to a connecting plate (9) installed on the top of the furnace body (1). The gaps between the jacket (7) and the crucible (3) and the connecting plate (9) are sealed with refractory material, and the top opening of the connecting plate (9) corresponds to the opening of the crucible (3).

2. A detachable intermediate frequency furnace according to claim 1, characterized in that: The jacket (7) is a silicon carbide jacket.

3. A detachable intermediate frequency furnace according to claim 1, characterized in that: The crucible (3) is a graphite crucible.

4. A detachable intermediate frequency furnace according to claim 1, characterized in that: The graphite powder (8) comprises fine-grained graphite powder (801) and coarse-grained graphite powder (802), wherein the fine-grained graphite powder (801) is filled at the bottom between the jacket (7) and the crucible (3) and below 3 / 4 of the height, and the coarse-grained graphite powder (802) is filled at more than 3 / 4 of the height between the jacket (7) and the crucible (3).

5. The detachable intermediate frequency furnace according to claim 1, characterized in that: The connecting plate (9) is composed of two connectable aluminum plates.

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