Smelting furnace

Abstract

The utility model discloses a smelter, which relates to the technical field of electric arc furnaces, and comprises a furnace body with a discharge port, a cooling furnace jacket, a first cooling pipeline and a second cooling pipeline, the cooling furnace jacket comprises a discharge channel, one end of the discharge channel is adjacent to the discharge port, and the shape and the extension direction of the discharge channel are matched with those of the discharge port. When the electric furnace body works, the discharging structures used for guiding discharging of feed liquid are all exposed under the influence of the high temperature of the feed liquid, cooling fluid flows in the first cavity and then flows into the second cavity through the through grooves, and it is guaranteed that the cooling fluid flows in the first cavity and the second cavity to take away heat; and the cooling fluid is discharged out of the interior of the cooling furnace jacket through the second cooling pipeline, heat dissipation treatment can be conducted on the cooling furnace jacket through flowing of the cooling fluid, and therefore loss of the cooling furnace jacket caused by high temperature is reduced, the service life of the cooling furnace jacket is prolonged, and meanwhile maintenance of a furnace nozzle and the like is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of corundum electric arc furnaces, and particularly relates to a melting furnace. Background Art

[0002] An electric arc furnace is a melting furnace that uses the high temperature of an electric arc to melt raw materials to obtain the required liquid material. A corundum electric arc furnace is one type of electric arc furnace, which is mainly used for the smelting of fused corundum, including the preparation of various types of corundum such as brown corundum, white corundum, and zircon corundum.

[0003] When the electric furnace is working, high-temperature electric arcs will be generated between the electrodes. The temperature of these electric arcs is extremely high, reaching thousands of degrees Celsius. The liquid material in the furnace body of the electric furnace needs to be discharged through discharge structures such as the furnace nozzle. These discharge structures are exposed to high temperatures for a long time during the operation of the electric arc furnace, which will cause an increase in the thermal stress of the material, deformation, or even melting, thus damaging the equipment. In addition, high temperatures will also generate large thermal stresses inside these discharge structures, and long-term accumulation may lead to cracking or falling off of the furnace nozzle, seriously affecting production safety. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a melting furnace to solve the technical problem that the working environment of the discharge structure in the prior art is extremely harsh and prone to cracking.

[0005] The technical problem to be solved by the utility model can be realized through the following technical solutions:

[0006] A melting furnace includes a furnace body with a discharge port, and also includes a cooling furnace sleeve, a first cooling pipeline, and a second cooling pipeline. The cooling furnace sleeve includes a discharge channel. One end of the discharge channel is adjacent to the discharge port, and its shape and extension direction are matched with the discharge port. The cooling furnace sleeve also includes an inner cavity, and the inner cavity includes a partition unit and a first cavity and a second cavity formed by the partition unit. The first cavity is located on the side of the inner cavity close to the furnace body. The partition unit includes a through groove. The first cooling pipeline is in fluid communication with the first cavity, and the second cooling pipeline is in fluid communication with the second cavity.

[0007] As a further scheme of the utility model: it also includes a furnace nozzle. The discharge channel is located between the discharge port and the furnace nozzle, and the shape and extension direction of the furnace nozzle are matched with the discharge channel.

[0008] As a further scheme of the utility model: the melting furnace is an electric arc furnace.

[0009] As a further scheme of the utility model: it also includes a cooling jacket located on the outer wall of the furnace body.

[0010] As a further solution of the present utility model: The discharge port is located on the side wall of the furnace body.

[0011] As a further solution of the present utility model: The discharge channel extends horizontally and is cylindrical.

[0012] As a further solution of the present utility model: It further includes a support part for supporting the cooling furnace jacket, and the support part is located on the side wall of the furnace body.

[0013] As a further solution of the present utility model: The support part includes a jacket accommodation part, and the cooling furnace jacket is located in the jacket accommodation part.

[0014] As a further solution of the present utility model: The through groove is located in the upper part of the inner cavity of the cooling furnace jacket, and the second cavity is located on the side of the inner cavity away from the furnace body.

[0015] As a further solution of the present utility model: The inlet of the first cooling pipe is located in the lower part of the first cavity, and the outlet of the second cooling pipe is located in the upper part of the second cavity.

[0016] The beneficial effects of the present utility model: When the electric furnace body is working, high-temperature arcs will be generated between the electrodes. The temperature of these arcs is extremely high, reaching thousands of degrees Celsius. The cooling fluid can enter the inside of the cooling furnace jacket through the first cooling pipe. The inside of the cooling furnace jacket is divided into two spaces by the partition unit, namely the first cavity and the second cavity. The cooling fluid enters the inside of the first cavity through the first cooling pipe and then flows to the inside of the second cavity through the through groove. The through groove is located at the top of the cooling furnace jacket, and the position of the through groove is far from the port of the first cooling pipe, which can make the cooling fluid flow in the first cavity and then flow into the second cavity through the through groove, ensuring that the cooling fluid flows in the first cavity and the second cavity to take away heat, and then is discharged from the inside of the cooling furnace jacket through the second cooling pipe. Through the flow of the cooling fluid, the cooling furnace jacket can be cooled, thereby reducing the cracking and loss of the cooling furnace jacket caused by high temperature. While extending the service life of the cooling furnace jacket, it is also more convenient to maintain the furnace nozzle and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further describes the present utility model with reference to the drawings.

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is a schematic diagram of the structure of the discharge port in the present utility model;

[0020] Figure 3 is a schematic diagram of the structure of the support part in the present utility model;

[0021] Figure 4 It is a schematic diagram of the internal structure of the cooling furnace jacket in the present utility model;

[0022] Figure 5 It is a schematic diagram of the structure of the separation unit in the present utility model;

[0023] In the figure: 1, furnace body; 2, cooling furnace jacket; 3, furnace nozzle; 4, first cooling pipeline; 5, second cooling pipeline; 6, separation unit; 7, through groove; 8, first cavity; 9, second cavity; 10, discharge port; 11, support part; 12, sheath accommodating part; 13, discharge channel. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0025] As Figures 1-5 shown, a melting furnace includes a furnace body 1 having a discharge port 10, and further includes a cooling furnace jacket 2, a first cooling pipeline 4 and a second cooling pipeline 5. The cooling furnace jacket 2 includes a discharge channel 13. One end of the discharge channel 13 is adjacent to the discharge port 10, and its shape and extension direction are matched with the discharge port 10. The cooling furnace jacket 2 further includes an inner cavity. The inner cavity includes a separation unit 6, and a first cavity 8 and a second cavity 9 separated by the separation unit 6. The first cavity 8 is located on the side of the inner cavity close to the furnace body 1. The separation unit 6 includes a through groove 7. The first cooling pipeline 4 is in fluid communication with the first cavity 8, and the second cooling pipeline 5 is in fluid communication with the second cavity 9. During operation, the cooling furnace jacket 2 is located on one side of the discharge port 10, and one end of its discharge channel 13 is adjacent to the discharge port 10 to ensure that the liquid material discharged from the furnace body 1 can flow through the discharge port 10 to the discharge channel 13 of the cooling furnace jacket 2. The liquid material discharged from the discharge port 10 has a relatively high temperature. The cooling fluid (for example, water) can enter the inside of the cooling furnace jacket 2 through the first cooling pipeline 4. The inside of the cooling furnace jacket 2 is divided into two spaces by the separation unit 6, namely the first cavity 8 and the second cavity 9. The cooling fluid first enters the inside of the first cavity 8 through the first cooling pipeline 4 (using the cooling fluid to perform heat exchange on the relatively higher temperature side in the inner cavity of the cooling furnace jacket 2 to further improve the cooling effect), then flows to the inside of the second cavity 9 through the through groove 7, and then is discharged from the inside of the cooling furnace jacket 2 through the second cooling pipeline 5. Through the flow of the cooling fluid, the cooling furnace jacket 2 can be fully cooled, reducing the frequency of maintenance and replacement of the cooling furnace jacket 2.

[0026] In some specific embodiments, the cooling furnace jacket 2 can be made of cast iron. Compared with other materials (such as steel, etc.), cast iron has better thermal stability and is not prone to cracking, thereby further reducing the maintenance and replacement frequency of the cooling furnace jacket 2.

[0027] In some specific embodiments, a nozzle 3 is further included. The discharge channel 13 is located between the discharge port 10 and the nozzle 3. The shape and extension direction of the nozzle 3 are matched with the discharge channel 13, so that the liquid material discharged from the discharge port 10 can flow through the discharge channel 13 and then into the nozzle 3, enabling the liquid material to be normally discharged through the nozzle 3. The cooling furnace jacket 2 located between the discharge port 10 and the nozzle 3 plays a bridging and transitional role. Since the cooling furnace jacket 2 is at the liquid level of the furnace body liquid material and cannot be directly cooled by external spray water due to its special position, its working environment is relatively more severe. The separate design of the two is more convenient for separately maintaining the cooling furnace jacket 2 and the nozzle 3, while extending the service life of the cooling furnace jacket and being more convenient for maintaining the nozzle and the like.

[0028] In some specific embodiments, the melting furnace is an electric arc furnace, and more specifically, it can be a corundum electric arc furnace. An electric arc furnace usually refers to a furnace that uses the high temperature generated by an electrode arc to smelt ores and metals. The liquid material melted at a high temperature in the electric arc furnace usually has a very high temperature, so the corresponding discharge facilities of the melting furnace often need to be frequently maintained and replaced. However, through the technical solution of the present application, the safety of the electric arc furnace can be effectively improved, and at the same time, it is ensured that the nozzle 3 can be replaced during the continuous production process.

[0029] In some specific embodiments, a cooling jacket located on the outer wall of the furnace body 1 is further included. The presence of the cooling jacket is generally beneficial for direct heat exchange of the furnace body 1 itself to prevent the temperature of the outer wall of the furnace body 1 from being too high.

[0030] In some specific embodiments, the discharge port 10 is located on the side wall of the furnace body 1 to facilitate the liquid material to flow out from the discharge port 10. The discharge port 10 can be a circular notch, and the discharge channel 13 can be an upper-opening groove body that matches its size and shape. The discharge channel 13 can extend horizontally, and the discharge channel 13 can be cylindrical, so as to cooperate with the discharge port 10, enabling the liquid material to smoothly flow from the discharge port 10 into the discharge channel 13 and ensuring that the liquid material can be normally discharged from the discharge channel 13 and further flow into the nozzle 3. The nozzle 3 can include an upper-opening groove body, a pipeline, etc. that match the size and shape of the discharge channel 13, so that the liquid material can smoothly flow from the discharge channel 13 into the nozzle 3.

[0031] In some specific embodiments, it further includes a support portion 11 for supporting the cooling furnace jacket 2, and the support portion 11 is located on the side wall of the furnace body 1; the support portion 11 includes a jacket accommodation portion 12, and the cooling furnace jacket 2 is located in the jacket accommodation portion 12; the cooling furnace jacket 2 is used to transition between the discharge port 10 and the furnace nozzle 3. The position of the cooling furnace jacket 2 can be defined through the support portion 11. Before operation, the cooling furnace jacket 2 is installed in the jacket accommodation portion 12 inside the support portion 11, which also facilitates the disassembly, maintenance, and replacement operations of the cooling furnace jacket 2.

[0032] In some specific embodiments, the through groove 7 is located in the upper part of the inner cavity of the cooling furnace jacket 2, the inlet of the first cooling pipe 4 (i.e., the pipe opening of the first cooling pipe 4 in the first cavity 8, and the cooling fluid can flow into the inner cavity of the cooling furnace jacket 2 through this pipe opening) is located in the lower part of the first cavity, and the outlet of the second cooling pipe (i.e., the pipe opening of the second cooling pipe 5 in the second cavity 9, and the cooling fluid can flow out of the inner cavity of the cooling furnace jacket 2 through this pipe opening) is located in the upper part of the second cavity. Thus, the cooling fluid can fully flow inside the first cavity 8 and then enter the second cavity 9 through the through groove 7, and further smoothly flow out of the inner cavity of the cooling furnace jacket 2 to ensure that the cooling fluid undergoes sufficient heat exchange inside the cavity.

[0033] For the convenience of those skilled in the art to understand the embodiments of the present solution, the working principle of the embodiments of the present solution will be described in combination with a specific application scenario: During operation, the cooling furnace jacket 2 is located on one side of the discharge port 10, and one end of its discharge channel 13 is adjacent to the discharge port 10 to ensure that the liquid material discharged from the furnace body 1 can flow through the discharge port 10 to the discharge channel 13 of the cooling furnace jacket 2. The temperature of the liquid material discharged from the discharge port 10 is relatively high. The cooling fluid can enter the interior of the cooling furnace jacket 2 through the first cooling pipe 4. The interior of the cooling furnace jacket 2 is divided into two spaces by the partition unit 6, namely the first cavity 8 and the second cavity 9. The cooling fluid enters the interior of the first cavity 8 through the first cooling pipe 4, then flows to the interior of the second cavity 9 through the through groove 7, and then is discharged from the interior of the cooling furnace jacket 2 through the second cooling pipe 5. Through the flow of the cooling fluid, the cooling furnace jacket 2 can be fully cooled, reducing the frequency of maintenance and replacement of the cooling furnace jacket 2; The cooling furnace jacket 2 can be made of cast iron. Compared with other materials, cast iron has better thermal stability and is not prone to cracking, which can further reduce the frequency of maintenance and replacement of the cooling furnace jacket 2; The shape and extension direction of the nozzle 3 are matched with the discharge channel 13, so that the liquid material discharged from the discharge port 10 can flow into the nozzle 3 through the discharge channel 13, and the liquid material can be normally discharged through the nozzle 3. The cooling furnace jacket 2 is located between the discharge port 10 and the nozzle 3, playing a role of a bridge and transition. Since the cooling furnace jacket 2 is at the liquid level of the furnace body liquid material and cannot be directly cooled by external spray water due to its special position, its working environment is relatively harsher. The separate design will be more convenient for the separate maintenance of the cooling furnace jacket 2 and the nozzle 3; The discharge channel 13 is cylindrical, so that it can be matched with the discharge port 10 to enable the liquid material to flow smoothly from the discharge port 10 into the discharge channel 13, ensure that the liquid material can be normally discharged from the discharge channel 13, and further flow into the nozzle 3; The cooling furnace jacket 2 is used to transition between the discharge port 10 and the nozzle 3. The position of the cooling furnace jacket 2 can be limited by the support part 11. Before operation, the cooling furnace jacket 2 is installed in the jacket receiving part 12 inside the support part 11, which is also convenient for the disassembly, maintenance and replacement operations of the cooling furnace jacket 2; The outlet of the second cooling pipe is located in the upper part of the second cavity, so that the cooling fluid can fully flow in the interior of the first cavity 8 and then enter the second cavity 9 through the through groove 7, and further flow out of the inner cavity of the cooling furnace jacket 2 smoothly to ensure that the cooling fluid undergoes sufficient heat exchange inside the cavity.

[0034] The above has described in detail an embodiment of the present invention, but the above content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application should still fall within the scope covered by the patent of the present invention.

Claims

1. A furnace, characterized in that, It includes a furnace body (1) having a discharge port (10), and further includes a cooling furnace jacket (2), a first cooling pipe (4) and a second cooling pipe (5). The cooling furnace jacket (2) includes a discharge channel (13). One end of the discharge channel (13) is adjacent to the discharge port (10), and its shape and extending direction are matched with those of the discharge port (10). The cooling furnace jacket (2) further includes an inner cavity, and the inner cavity includes a partition unit (6), and a first cavity (8) and a second cavity (9) formed by separating with the partition unit (6). The first cavity (8) is located on the side of the inner cavity close to the furnace body (1). The partition unit (6) includes a through groove (7). The first cooling pipe (4) is in fluid communication with the first cavity (8), and the second cooling pipe (5) is in fluid communication with the second cavity (9).

2. The furnace according to claim 1, characterized in that, It further includes a nozzle (3). The discharge channel (13) is located between the discharge port (10) and the nozzle (3), and the shape and extending direction of the nozzle (3) are matched with those of the discharge channel (13).

3. A furnace according to claim 1, characterized in that, The melting furnace is an electric arc furnace.

4. A furnace according to claim 1, wherein, It further includes a cooling jacket located on the outer wall of the furnace body (1).

5. A furnace according to claim 1, characterized in that, The discharge port (10) is located on the side wall of the furnace body (1).

6. A furnace according to claim 1, characterized in that, The discharge channel (13) extends horizontally and is cylindrical.

7. A furnace according to claim 1, characterized in that, It further includes a support part (11) for supporting the cooling furnace jacket (2), and the support part (11) is located on the side wall of the furnace body (1).

8. A furnace according to claim 7, characterized in that, The support part (11) includes a sheath accommodating part (12), and the cooling furnace jacket (2) is located in the sheath accommodating part (12).

9. A furnace according to claim 1, characterized in that, The through groove (7) is located in the upper part of the inner cavity of the cooling furnace jacket (2), and the second cavity (9) is located on the side of the inner cavity far from the furnace body (1).

10. A furnace according to claim 1, characterized in that, The inlet of the first cooling pipe (4) is located in the lower part of the first cavity (8), and the outlet of the second cooling pipe (5) is located in the upper part of the second cavity (9).

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