A brown fused alumina arc smelting furnace

Abstract

This utility model relates to the field of brown fused alumina production and processing technology, and provides a brown fused alumina electric arc smelting furnace, including: a smelting room set inside a factory building, a smelting furnace mounted inside the smelting room, and a discharge port at the lower end of the smelting furnace; high-temperature refractory bricks connected by high-temperature refractory mud are embedded in the furnace shell at the discharge port; a baffle plate is rotatably connected above the high-temperature refractory bricks on the furnace shell; an mounting frame is set above the baffle plate on the furnace shell, and straight rods are fixedly connected between the mounting frames; a remotely adjustable control mechanism is set between the straight rods and the baffle plate. This utility model allows the limiting rings to be hung on positioning rings at different heights according to different slag discharge conditions, thereby realizing the function of switching different angles of the baffle plate. During manual operation, the angle of the baffle plate can be adjusted away from the discharge port, thereby reducing safety hazards during slag discharge and improving the safety of slag discharge operations.

Description

Technical Field

[0001] This utility model relates to the field of brown fused alumina production and processing technology, and in particular to a brown fused alumina electric arc smelting furnace. Background Technology

[0002] Brown fused alumina, also known as corundum, is a widely used industrial material. Its main chemical component is Al₂O₃, with a content of 95.00%-97.00%, and it also contains small amounts of Fe, Si, Ti, etc. As a widely used industrial material, the production of brown fused alumina mainly relies on electric arc furnaces for smelting. The brown fused alumina electric arc smelting furnace is a key piece of equipment that uses the high temperature generated by an electric arc to melt and reduce raw materials such as bauxite, carbon materials, and iron filings, thereby producing brown fused alumina. During the smelting process, a certain amount of slag is generated, which needs to be regularly discharged to ensure the normal operation of the smelting furnace and the quality of the brown fused alumina produced.

[0003] After electric arc smelting, the slag needs to be discharged regularly. The common discharge method is unloading from the slag discharge port. However, in order to control the slag discharge flow rate, the operator needs to adjust the baffle plate at close range and intervene in the face of the high-temperature molten slag flow. Although there are anti-scalding protection measures, there are many uncertainties in slag discharge, which leads to the risk of serious burns, molten slag splashing, and inhalation of toxic fumes during the slag discharge process. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art that, although anti-scalding protection measures are set up when intervening in the high-temperature molten slag flow, there are still many uncertainties in slag discharge, which leads to the risk of serious burns, molten slag splashing, and inhalation of toxic fumes during the slag discharge process.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a brown corundum electric arc smelting furnace, comprising a workshop, a large hydraulic cylinder, and smelting electrodes, wherein the smelting electrodes are installed at the output end of the large hydraulic cylinder, and include:

[0006] A smelting room is set up inside the factory building. A smelting furnace shell is installed inside the smelting room. A furnace lining composed of high-temperature refractory bricks is installed inside the smelting furnace shell. A discharge port is provided at the lower end of the smelting furnace shell.

[0007] The furnace shell of the smelting furnace is fitted with high-temperature refractory bricks connected by high-temperature refractory mud at the discharge port.

[0008] The furnace shell of the smelting furnace is rotatably connected to a baffle plate above the high-temperature refractory bricks.

[0009] The furnace shell of the smelting furnace is provided with an installation frame above the baffle plate, and straight rods are fixedly connected between the installation frames.

[0010] A remotely adjustable control mechanism is provided between the straight rod and the material blocking plate. The operator can remotely control the control device through the clamp rod. The operation is simple and quick, allowing the operator to stay away from the slag discharge port, reducing safety hazards during the slag discharge process and improving the safety of the slag discharge operation.

[0011] In a preferred embodiment, the control mechanism includes multiple positioning rings fixedly connected to the outer wall of the straight rod. The positioning rings and the straight rod form a multi-level protrusion structure. A first connecting frame is fixedly installed at the end of the material blocking plate. A limiting ring is sleeved at the protrusion formed by the straight rod and the positioning rings. The inner diameter of the limiting ring is 10cm larger than the outer diameter of the positioning ring. A second connecting frame is fixedly connected to the end of the limiting ring. A connecting plate is rotatably connected between the first connecting frame and the second connecting frame. Under the influence of the material blocking plate's own weight, the connecting plate will always cause the limiting ring to be subjected to a downward pulling force. The limiting ring can be manually pulled by the clamping rod to make it position above the straight rod. It can slide downward through the slightly larger inner diameter. With the control of the clamping rod, the limiting ring can be switched to be above different positioning rings. Combined with the influence of the material blocking plate's gravity, the protrusion mechanism formed by the straight rod and the positioning ring can stably hold the limiting ring. The change in the height of the limiting ring can cause the connecting plate to change angle, thereby causing the material blocking plate to change angle, thus realizing the function of controlling the angle of the material blocking plate.

[0012] In a preferred embodiment, the furnace shell of the smelting furnace is fixedly connected to a guide channel that is inclined towards the ground at the lower end of the discharge port.

[0013] In a preferred embodiment, a support frame is fixedly connected to the lower end of the furnace shell, and a connecting water ring is installed at the top of the support frame. Multiple evenly distributed nozzles are fixedly connected to the lower end of the connecting water ring. The connecting water ring distributes water to the multiple nozzles to spray the outer wall of the furnace shell. Through water evaporation and heat absorption, heat is quickly carried away, keeping the surface temperature of the furnace shell below 150-250°C, maintaining the mechanical properties of the steel, and preventing deformation and failure.

[0014] In a preferred embodiment, three evenly distributed input pipes are fixedly connected to the lower end of the connecting water ring, and a connection interface is fixedly connected to the end of each input pipe. Water is supplied to the input pipes through the connection interface. The three evenly distributed input pipes ensure a more uniform distribution of water within the connecting water ring, resulting in more uniform water spray from the nozzles and more uniform cooling of the outer wall of the smelting furnace shell.

[0015] In a preferred embodiment, a pull ring is fixedly connected to the outer wall of the end of the high-temperature refractory brick. The pull ring facilitates the use of a hook rod to pull out the high-temperature refractory brick for slag removal.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0017] This utility model allows the limiting ring to be hung on positioning rings at different heights according to different slag discharge conditions, thereby realizing the function of switching different angles of the material blocking plate. During manual operation, the angle of the material blocking plate can be adjusted when the material discharge port is far away, thereby reducing safety hazards during slag discharge and improving the safety of slag discharge operation. Attached Figure Description

[0018] Figure 1 A three-dimensional structural schematic diagram of a brown fused alumina electric arc smelting furnace provided for this utility model;

[0019] Figure 2 A schematic diagram of the three-dimensional spatial distribution structure of a brown fused alumina electric arc smelting furnace provided by this utility model;

[0020] Figure 3 This utility model provides a brown fused alumina electric arc smelting furnace. Figure 1 Enlarged view of a portion of point A in the middle;

[0021] Figure 4 This utility model provides a brown fused alumina electric arc smelting furnace. Figure 1 Enlarged view of section B in the middle.

[0022] Legend:

[0023] 1. Workshop; 2. Smelting room; 3. Smelting furnace shell; 4. Large hydraulic cylinder; 5. Smelting electrode; 6. Nozzle; 7. Input pipe; 8. Connection interface; 9. Discharge port; 10. High-temperature refractory brick; 11. Pull ring; 12. Material blocking plate; 13. Mounting frame; 14. Straight rod; 15. First connecting frame; 16. Second connecting frame; 17. Connecting plate; 18. Limiting ring; 19. Positioning ring; 20. Connecting water ring; 21. Support frame; 22. Material guide channel. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 This utility model provides a technical solution: a brown corundum electric arc smelting furnace, including a workshop (1), a large hydraulic cylinder (4), and a smelting electrode (5), wherein the smelting electrode (5) is installed at the output end of the large hydraulic cylinder (4), and includes:

[0026] A smelting room (2) is set inside the factory building (1). A smelting furnace shell (3) is set inside the smelting room (2). A furnace lining composed of high-temperature refractory bricks (10) is set inside the smelting furnace shell (3). A discharge port (9) is set at the lower end of the smelting furnace shell (3).

[0027] The furnace shell (3) of the smelting furnace is fitted with high-temperature refractory bricks (10) connected by high-temperature refractory mud at the discharge port (9).

[0028] The furnace shell (3) of the smelting furnace is rotatably connected to a baffle plate (12) above the high-temperature refractory bricks (10).

[0029] The furnace shell (3) of the smelting furnace is provided with a mounting frame (13) above the baffle plate (12), and straight rods (14) are fixedly connected between the mounting frames (13).

[0030] A remotely adjustable control mechanism is provided between the straight rod (14) and the material blocking plate (12);

[0031] During the smelting heating process, the smelting electrode 5 is inserted into the smelting furnace by a large hydraulic cylinder 4 and rapidly heated by resistance heating. This is a common heating method for smelting furnaces. After the smelting electrode 5 is energized, it can generate a large amount of heat with the resistance material in the smelting furnace, thereby realizing the function of arc smelting of brown corundum.

[0032] In this application, the control device can be remotely controlled by a clamp rod. The control operation is simple and quick, allowing the operator to stay away from the slag discharge port, reducing safety hazards during the slag discharge process and improving the safety of the slag discharge operation.

[0033] like Figure 1-4As shown, the control mechanism includes multiple positioning rings 19 fixedly connected to the outer wall of the straight rod 14. A multi-level protrusion structure is formed between the positioning rings 19 and the straight rod 14. A first connecting frame 15 is fixedly installed at the end of the material blocking plate 12. A limiting ring 18 is sleeved at the protrusion formed between the straight rod 14 and the positioning rings 19. The inner diameter of the limiting ring 18 is 10cm larger than the outer diameter of the positioning rings 19. A second connecting frame 16 is fixedly connected to the end of the limiting ring 18. A connecting plate 17 is rotatably connected between the first connecting frame 15 and the second connecting frame 16. Under the influence of the weight of the material blocking plate 12, the limiting ring 18 will always remain in place by the connecting plate 17. The ring 18 is subjected to a downward pulling force. The limiting ring 18 can be manually pulled by the clamping rod to position the limiting ring 18 above the straight rod 14. It can slide downward through the slightly larger inner diameter. With the control of the manual clamping rod, the limiting ring 18 can be switched to be above different positioning rings 19. With the influence of the gravity of the blocking plate 12, the protrusion mechanism formed by the straight rod 14 and the positioning ring 19 can stably hold the limiting ring 18. The change in the height of the limiting ring 18 can cause the connecting plate 17 to change angle, thereby driving the blocking plate 12 to change angle, realizing the function of controlling the angle of the blocking plate 12.

[0034] like Figure 1-4 As shown, the furnace shell 3 of the smelting furnace is fixedly connected to a guide channel 22 that is inclined towards the ground at the lower end of the discharge port 9. This guide channel can guide the direction of movement of the discharged slag, making it easier for the slag to enter the discharge hopper car for transfer and recycling.

[0035] like Figure 1-4 As shown, a support frame 21 is fixedly connected to the lower end of the furnace shell 3 of the smelting furnace. A connecting water ring 20 is installed at the top of the support frame 21, and multiple evenly distributed nozzles 6 are fixedly connected to the lower end of the connecting water ring 20. Water can be distributed to multiple nozzles 6 through the connecting water ring 20 to spray the outer wall of the furnace shell 3 of the smelting furnace. Through water evaporation and heat absorption, heat is quickly carried away, and the surface temperature of the furnace shell is controlled below 150-250°C to maintain the mechanical properties of the steel and avoid deformation and failure.

[0036] like Figure 1-4 As shown, three evenly distributed input pipes 7 are fixedly connected to the lower end of the connecting water ring 20, and a connecting interface 8 is fixedly connected to the end of the input pipe 7. Water is supplied to the input pipe 7 through the connecting interface 8. The three evenly distributed input pipes 7 can make the water source distribution in the connecting water ring 20 more uniform, making the water sprayed from the nozzle 6 more uniform, and making the outer wall of the furnace shell 3 of the smelting furnace cool down uniformly.

[0037] like Figure 1-4 As shown, a pull ring 11 is fixedly connected to the outer wall of the end of the high-temperature refractory brick 10; the pull ring 11 facilitates the use of a hook rod to pull out the high-temperature refractory brick 10 for slag removal.

[0038] Working principle: When adjusting the angle of the material blocking plate 12, a person can be positioned outside the smelting chamber 2 and use a clamping rod to pull the limiting ring 18, so that the limiting ring 18 is above the straight rod 14. It can slide downward through a slightly larger inner diameter. With the control of the clamping rod, the limiting ring 18 can be switched to be above different positioning rings 19. With the influence of the gravity of the material blocking plate 12, the protrusion mechanism formed by the straight rod 14 and the positioning ring 19 can stably hold the limiting ring 18. The change in the height of the limiting ring 18 can cause the connecting plate 17 to change angle, thereby causing the material blocking plate 12 to change angle. The discharge space exposed by different angles of the material blocking plate 12 is different. The larger the discharge space, the faster the slag discharge speed. The limiting ring 18 can be hung on the positioning rings 19 at different heights according to different slag discharge conditions, thereby realizing the function of switching different angles of the material blocking plate 12. When operating manually, one can stay away from the discharge port 9, thereby reducing safety hazards during the slag discharge process and improving the safety of the slag discharge operation.

[0039] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A brown corundum electric arc smelting furnace, comprising a workshop (1), a large hydraulic cylinder (4), and a smelting electrode (5), wherein the smelting electrode (5) is installed at the output end of the large hydraulic cylinder (4), characterized in that, include: A smelting room (2) is set inside the factory building (1). A smelting furnace shell (3) is set inside the smelting room (2). A furnace lining composed of high-temperature refractory bricks (10) is set inside the smelting furnace shell (3). A discharge port (9) is set at the lower end of the smelting furnace shell (3). The furnace shell (3) of the smelting furnace is fitted with high-temperature refractory bricks (10) connected by high-temperature refractory mud at the discharge port (9). The furnace shell (3) of the smelting furnace is rotatably connected to a baffle plate (12) above the high-temperature refractory bricks (10). The furnace shell (3) of the smelting furnace is provided with a mounting frame (13) above the baffle plate (12), and straight rods (14) are fixedly connected between the mounting frames (13). A remotely adjustable control mechanism is provided between the straight rod (14) and the material blocking plate (12).

2. A brown fused alumina arc furnace as claimed in claim 1, wherein: The control mechanism includes multiple positioning rings (19) fixedly connected to the outer wall of the straight rod (14). The positioning rings (19) and the straight rod (14) form a multi-level protrusion structure. A first connecting frame (15) is fixedly installed at the end of the material blocking plate (12). A limiting ring (18) is sleeved at the protrusion formed by the straight rod (14) and the positioning rings (19). The inner diameter of the limiting ring (18) is 10cm larger than the outer diameter of the positioning ring (19). A second connecting frame (16) is fixedly connected to the end of the limiting ring (18). A connecting plate (17) is rotatably connected between the first connecting frame (15) and the second connecting frame (16).

3. The brown fused alumina electric arc furnace as claimed in claim 1, wherein: The furnace shell (3) of the smelting furnace is fixedly connected to a guide channel (22) that is inclined towards the ground at the lower end of the discharge port (9).

4. The brown fused alumina arc furnace as claimed in claim 1, wherein: The furnace shell (3) of the smelting furnace is fixedly connected to a support frame (21) at the lower end. A connecting water ring (20) is installed at the top of the support frame (21). A plurality of evenly distributed nozzles (6) are fixedly connected to the lower end of the connecting water ring (20).

5. A brown fused alumina arc furnace as claimed in claim 4, wherein: The lower end of the connecting water ring (20) is fixedly connected to three evenly distributed input pipes (7), and the end of the input pipes (7) is fixedly connected to a connection interface (8).

6. The brown fused alumina arc furnace as claimed in claim 1, wherein: A pull ring (11) is fixedly connected to the outer wall of the end of the high-temperature refractory brick (10).

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