Melting furnace for preparing vanadium pentoxide through three-step method
By optimizing the structure and material combination of the melting furnace, the problem of short service life of vanadium pentoxide melting furnace was solved, resulting in a longer service life and lower production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDE YANBEI METALLURGY MATERIAL CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-05-19
AI Technical Summary
In the existing three-step process, the vanadium pentoxide melting furnace has a short service life, especially due to severe refractory material loss caused by flame corrosion, which affects production efficiency.
By optimizing the number of charging ports and burners in the melting furnace, and combining the design of the water beam assembly and fire baffle, a layered structure of refractory fiber, lightweight clay bricks and clay bricks is adopted to increase the distance between the flame and the furnace wall, reduce corrosion points, and set up a water beam fire baffle to delay water beam corrosion.
This extends the service life of the melting furnace to 12 months while maintaining its normal operation and reducing production costs.
Smart Images
Figure CN224262179U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of vanadium-nitrogen alloy production technology, specifically relating to a melting furnace for the three-step preparation of vanadium pentoxide. Background Technology
[0002] Vanadium-nitrogen alloy is a novel alloying additive that can replace ferrovanadium in the production of microalloyed steel. Adding vanadium nitride to steel improves its overall mechanical properties, including strength, toughness, ductility, and resistance to thermal fatigue, and also gives it good weldability. The production process for vanadium-nitrogen alloy green balls involves grinding flake vanadium pentoxide into powder using a grinding mill, adding a carbonaceous reducing agent (graphite powder), a binder (water), and an accelerator (iron powder), mixing thoroughly, and then pressing the mixture into ellipsoidal shapes (green balls) of 40mm × 40mm × 25mm using a briquetting machine. The green balls are then subjected to carbothermic reduction-nitriding in a medium-frequency kiln or pusher kiln, where they are placed under a nitrogen flow and rapidly sintered at high temperature to produce the vanadium-nitrogen alloy.
[0003] Currently, the production of flake vanadium pentoxide used in vanadium-nitrogen alloys often employs a three-step process: drying, deammoniation, and melting of vanadium cakes containing approximately 40% water in ammonium polyvanadate. First, the vanadium cake is fed into a dryer by a feeder. Heated air enters the dryer, and under mechanical agitation, the vanadium cake is rapidly dried into powder, forming powdered ammonium polyvanadate. Then, the dried powdered vanadium is continuously fed into a deammoniation furnace, where heated air enters and rapidly mixes with the powdered vanadium. Rapid decomposition occurs in the continuous flow, resulting in vanadium pentoxide powder after several tens of seconds. Finally, the vanadium pentoxide powder is conveyed by a screw conveyor to a melting furnace for melting. The molten vanadium pentoxide liquid is then discharged through a chute into a water-cooled disc casting machine for casting, thus obtaining flake vanadium pentoxide.
[0004] For example, CN 114538514A discloses a three-step system for preparing vanadium pentoxide, including a drying unit, a calcination unit, and a melting unit. The drying unit includes a feeder, a dryer, a first dust removal device, and a first storage device connected in series along the material flow direction. The calcination unit includes a calcination furnace connected to the outlet of the first storage device. The melting unit includes a melting furnace connected to the outlet of the calcination furnace. This three-step system for preparing vanadium pentoxide aims to improve the production efficiency of vanadium pentoxide preparation and avoid ammonia leakage.
[0005] However, the three-step process used to produce flake vanadium pentoxide is generally a continuous production process. In the three-step melting furnace, the material inlet is often above the flame. After the continuous powdered vanadium pentoxide enters the furnace, it comes into contact with the flame and forms a vortex. In addition, the flame and vanadium corrode the refractory materials, and the refractory bricks around the inlet gradually corrode. The inlet is then burned, and the furnace walls on both sides and the water beam are severely corroded. The service life of the melting furnace in the industry is 6 months.
[0006] In conclusion, it is necessary to provide a novel vanadium pentoxide three-step melting furnace to extend its service life. Utility Model Content
[0007] To address the shortcomings of existing technologies, the purpose of this invention is to provide a melting furnace for the three-step preparation of vanadium pentoxide. By optimizing the number of charging ports and burners, and modifying the furnace walls, this invention extends the furnace's service life to 12 months without affecting its normal operation, demonstrating excellent performance.
[0008] To achieve this objective, the present invention adopts the following technical solution:
[0009] This utility model provides a melting furnace for the three-step preparation of vanadium pentoxide, the melting furnace comprising a square column furnace body;
[0010] A burner is provided at the center of the side of the square columnar furnace body; a feeding port is provided at the top of the square columnar furnace body, and a discharge port is provided at the bottom;
[0011] A water beam assembly is provided inside the square columnar furnace body in a direction away from the burner, dividing the interior of the furnace body into a melting chamber and a settling chamber.
[0012] The water beam assembly includes a water beam and a water beam fire baffle that are fitted together, with the water beam fire baffle positioned between the water beam and the burner.
[0013] In this invention, the melting furnace is equipped with one feeding port and one burner. Furthermore, by reducing the number of feeding ports to one, the number of corrosion points is reduced. Simultaneously, single-pipe feeding ensures uninterrupted material flow within the feeding pipe, providing a cooling effect. Reducing the number of burners increases the distance between the flame and the furnace wall, significantly reducing the flame's impact on the furnace wall. Additionally, the water-beam fire baffle further delays corrosion of the water beam. In summary, this invention extends the service life of the melting furnace without affecting its normal operation by reducing the number of feeding corrosion points, minimizing flame impact on the furnace wall, and mitigating water beam corrosion, demonstrating excellent performance.
[0014] As a preferred technical solution of this utility model, according to the direction from the outside to the inside, the furnace wall of the square column furnace body includes a refractory fiber layer, a lightweight clay brick layer and a clay brick layer stacked together.
[0015] Preferably, the thickness of the refractory fiber layer is 45-55 mm, for example, it can be 45 mm, 47 mm, 49 mm, 51 mm, 53 mm or 55 mm, but is not limited to the listed values. Other values not listed within the range are also applicable.
[0016] Preferably, the thickness of the lightweight clay brick layer is 110-120mm, for example, it can be 110mm, 112mm, 114mm, 116mm, 118mm or 120mm, etc., but is not limited to the listed values. Other unlisted values within the range are also applicable.
[0017] Preferably, the thickness of the clay brick layer is 340-350mm, for example, it can be 340mm, 342mm, 344mm, 346mm, 348mm or 350mm, etc., but is not limited to the listed values. Other unlisted values within the range are also applicable.
[0018] In this utility model, by using a reasonable combination of three different materials, namely refractory fiber, lightweight clay brick and clay brick, the furnace wall of the melting furnace can have good heat insulation, high temperature resistance, thermal shock resistance, structural support and erosion resistance, which can meet the various requirements of the furnace wall in the vanadium pentoxide preparation process, improve the performance and reliability of the melting furnace and reduce production costs.
[0019] More specifically, the clay brick layer can resist thermal shock caused by rapid temperature changes, protect the structural integrity of the furnace wall, and extend the service life of the furnace body.
[0020] As a preferred technical solution of this utility model, a fire baffle is provided on the inner surface of the furnace wall that is adjacent to both the furnace wall where the charging port is located and the furnace wall where the burner is located.
[0021] Preferably, the fire barrier is a layer of chrome corundum bricks.
[0022] Preferably, the thickness of the fire barrier is 110-120mm, for example, it can be 110mm, 112mm, 114mm, 116mm, 118mm or 120mm, etc., but is not limited to the listed values. Other unlisted values within the range are also applicable.
[0023] It is worth noting that the chromium corundum brick layer has excellent refractory properties, thermal shock resistance, wear resistance, corrosion resistance, and thermal conductivity. Placing it on the inner surface of the furnace wall is beneficial to the uniform distribution of temperature inside the furnace and further improves the service life of the melting furnace. If its thickness is too thick, it will lead to a smaller furnace volume and reduced output. Conversely, if its thickness is too thin, it will lead to a reduced corrosion resistance and the furnace wall will be easily burned through.
[0024] As a preferred technical solution of this utility model, the minimum distance between the fire baffle and the flame generated by the burner is 482-487mm, for example, it can be 482mm, 483mm, 484mm, 485mm, 486mm or 487mm, etc., but is not limited to the listed values. Other unlisted values within the range are also applicable.
[0025] It is worth noting that traditional melting furnaces have two burners, both located on the same side of the furnace wall, with a center distance of 879mm between the two burners. The distance between the flame generated by the burners and the wall is approximately 150mm. This invention, by reducing the number of burners, increases the distance between the flame and the wall to 482-487mm, thereby significantly reducing the erosion of the furnace wall by the flame and achieving the goal of extending the service life of the melting furnace.
[0026] As a preferred technical solution of this utility model, the distance between the feeding port and the burner is 1300-1400mm, for example, it can be 1300mm, 1320mm, 1340mm, 1360mm, 1380mm or 1400mm, etc., but is not limited to the listed values. Other unlisted values within the range are also applicable.
[0027] Preferably, the radius of the feeding port is 90-110mm, for example, it can be 90mm, 94mm, 98mm, 102mm, 106mm or 110mm, but is not limited to the listed values. Other unlisted values within the range are also applicable.
[0028] Preferably, the feeding port is located at the top centerline of the square column furnace body.
[0029] Preferably, the distance between the discharge port and the burner is 4700-4800mm, for example, it can be 4700mm, 4720mm, 4740mm, 4760mm, 4780mm or 4800mm, but is not limited to the listed values. Other values within the range that are not listed are also applicable.
[0030] Preferably, the diameter of the discharge port is 220-240mm, for example, it can be 220mm, 224mm, 228mm, 232mm, 236mm or 240mm, but is not limited to the listed values. Other unlisted values within the range are also applicable.
[0031] Preferably, the thickness of the water beam fire barrier is 110-120mm, for example, it can be 110mm, 112mm, 114mm, 116mm, 118mm or 120mm, etc., but is not limited to the listed values. Other unlisted values within the range are also applicable.
[0032] Preferably, the distance between the water beam fire wall and the feeding port is 3600-3700mm, for example, it can be 3600mm, 3620mm, 3640mm, 3660mm, 3680mm or 3700mm, but is not limited to the listed values. Other unlisted values within the range are also applicable.
[0033] Preferably, the length of the square column furnace body is 10 to 10.5m, for example, it can be 10m, 10.1m, 10.2m, 10.3m, 10.4m or 10.5m, but is not limited to the listed values. Other unlisted values within the range are also applicable.
[0034] Preferably, the width of the square columnar furnace body is 2.8 to 3.2 m, for example, it can be 2.8 m, 2.9 m, 3.0 m, 3.1 m or 3.2 m, but is not limited to the listed values. Other unlisted values within the range are also applicable.
[0035] Preferably, the length of the melting chamber is 5000 to 5050 mm, for example, it can be 5000 mm, 5010 mm, 5020 mm, 5030 mm, 5040 mm or 5050 mm, but is not limited to the listed values. Other unlisted values within the range are also applicable.
[0036] Preferably, the length of the settling chamber is 1200-1300mm, for example, it can be 1200mm, 1220mm, 1240mm, 1260mm, 1280mm or 1300mm, etc., but is not limited to the listed values. Other unlisted values within the range are also applicable.
[0037] The numerical range described in this utility model includes not only the point values listed above, but also any point values within the numerical range not listed above. Due to space limitations and for the sake of brevity, this utility model will not exhaustively list the specific point values included in the range.
[0038] The system refers to an equipment system, device system, or production device.
[0039] Compared with the prior art, the present invention has the following beneficial effects:
[0040] Compared with the prior art, the melting furnace described in this utility model can extend the service life of the melting furnace to 12 months by reducing the number of feeding ports and burners and optimizing the furnace wall structure, without affecting the normal operation of the melting furnace, and the effect is good. Attached Figure Description
[0041] Figure 1 A top view of a melting furnace for the three-step preparation of vanadium pentoxide, provided for a specific embodiment of this utility model;
[0042] Among them: 1 is the melting chamber, 2 is the settling chamber, 3 is the water beam, 4 is the burner, 5 is the feeding port, 6 is the water beam fire baffle, and 7 is the fire baffle. Detailed Implementation
[0043] It should be understood that in the description of this utility model, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0044] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.
[0045] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0046] In one specific embodiment, this utility model provides a melting furnace for the three-step preparation of vanadium pentoxide, such as... Figure 1 As shown, the melting furnace includes a square columnar furnace body;
[0047] A burner 4 is provided at the center of the side of the square column furnace body; a feeding port 5 is provided at the top of the square column furnace body, and a discharge port is provided at the bottom;
[0048] A water beam assembly is provided inside the square columnar furnace body in a direction away from the burner 4, which divides the interior of the furnace body into a melting chamber 1 and a settling chamber 2.
[0049] The water beam assembly includes a water beam 3 and a water beam fire baffle 6 that are fitted together, with the water beam fire baffle 6 disposed between the water beam 3 and the burner 4.
[0050] According to the direction from the outside to the inside, the furnace wall of the square column furnace body includes a refractory fiber layer, a lightweight clay brick layer and a clay brick layer stacked together; the thickness of the refractory fiber layer is 45-55mm; the thickness of the lightweight clay brick layer is 110-120mm; and the thickness of the clay brick layer is 340-350mm.
[0051] A fire baffle 7 is provided on the inner surface of the furnace wall that is adjacent to both the furnace wall where the charging port 5 is located and the furnace wall where the burner 4 is located; the fire baffle 7 is a layer of chromium corundum bricks and the thickness of the fire baffle 7 is 110-120mm.
[0052] The minimum distance between the fire baffle 7 and the flame generated by the burner 4 is 482-487 mm;
[0053] The distance between the feeding port 5 and the burner 4 is 1300-1400mm; the radius of the feeding port 5 is 90-110mm; the feeding port 5 is located on the center line of the top of the square column furnace body;
[0054] The distance between the discharge port and the burner 4 is 4700-4800mm; the diameter of the discharge port is 220-240mm.
[0055] The thickness of the water beam fire barrier 6 is 110-120mm; the distance between the water beam fire barrier 6 and the feeding port 5 is 3600-3700mm;
[0056] The length of the square column furnace body is 10-10.5m and the width is 2.8-3.2m; the length of the melting chamber 1 is 5000-5050mm and the length of the settling chamber 2 is 1200-1300mm.
[0057] Example 1
[0058] This embodiment provides a melting furnace for the three-step preparation of vanadium pentoxide, such as... Figure 1 As shown, the melting furnace includes a square columnar furnace body;
[0059] A burner 4 is provided at the center of the side of the square column furnace body; a feeding port 5 is provided at the top of the square column furnace body, and a discharge port is provided at the bottom;
[0060] A water beam assembly is provided inside the square columnar furnace body in a direction away from the burner 4, which divides the interior of the furnace body into a melting chamber 1 and a settling chamber 2.
[0061] The water beam assembly includes a water beam 3 and a water beam fire baffle 6 that are fitted together, with the water beam fire baffle 6 disposed between the water beam 3 and the burner 4.
[0062] According to the direction from the outside to the inside, the furnace wall of the square column furnace body includes a refractory fiber layer, a lightweight clay brick layer and a clay brick layer stacked together; the thickness of the refractory fiber layer is 50mm; the thickness of the lightweight clay brick layer is 115mm; and the thickness of the clay brick layer is 345mm.
[0063] A fire baffle 7 is provided on the inner surface of the furnace wall that is adjacent to both the furnace wall where the charging port 5 is located and the furnace wall where the burner 4 is located; the fire baffle 7 is a layer of chromium corundum bricks and the thickness of the fire baffle 7 is 115mm.
[0064] The minimum distance between the fire baffle 7 and the flame generated by the burner 4 is 482mm;
[0065] The distance between the feeding port 5 and the burner 4 is 1350mm; the radius of the feeding port 5 is 100mm; the feeding port 5 is located on the center line of the top of the square column furnace body;
[0066] The distance between the discharge port and the burner 4 is 4750mm; the diameter of the discharge port is 230mm.
[0067] The thickness of the water beam fire barrier 6 is 115mm; the distance between the water beam fire barrier 6 and the feeding port 5 is 3650mm;
[0068] The length of the rectangular furnace body is 10.25m and the width is 2.8m; the length of the melting chamber 1 is 5000mm and the length of the settling chamber 2 is 1250mm.
[0069] Example 2
[0070] This embodiment provides a melting furnace for the three-step preparation of vanadium pentoxide, the melting furnace comprising a square columnar furnace body;
[0071] A burner 4 is provided at the center of the side of the square column furnace body; a feeding port 5 is provided at the top of the square column furnace body, and a discharge port is provided at the bottom;
[0072] A water beam assembly is provided inside the square columnar furnace body in a direction away from the burner 4, which divides the interior of the furnace body into a melting chamber 1 and a settling chamber 2.
[0073] The water beam assembly includes a water beam 3 and a water beam fire baffle 6 that are fitted together, with the water beam fire baffle 6 disposed between the water beam 3 and the burner 4.
[0074] According to the direction from the outside to the inside, the furnace wall of the square column furnace body includes a refractory fiber layer, a lightweight clay brick layer and a clay brick layer stacked together; the thickness of the refractory fiber layer is 45mm; the thickness of the lightweight clay brick layer is 110mm; and the thickness of the clay brick layer is 340mm.
[0075] A fire baffle 7 is provided on the inner surface of the furnace wall that is adjacent to both the furnace wall where the charging port 5 is located and the furnace wall where the burner 4 is located; the fire baffle 7 is a layer of chromium corundum bricks and the thickness of the fire baffle 7 is 110mm.
[0076] The minimum distance between the fire baffle 7 and the flame generated by the burner 4 is 458mm;
[0077] The distance between the feeding port 5 and the burner 4 is 1300mm; the radius of the feeding port 5 is 90mm; the feeding port 5 is located on the center line of the top of the square column furnace body;
[0078] The distance between the discharge port and the burner 4 is 4700mm; the diameter of the discharge port is 220mm.
[0079] The thickness of the water beam fireproof wall 6 is 110mm; the distance between the water beam fireproof wall 6 and the feeding port 5 is 3600mm;
[0080] The rectangular furnace body is 10m long and 2.8m wide; the melting chamber 1 is 5000mm long and the settling chamber 2 is 1200mm long.
[0081] Example 3
[0082] This embodiment provides a melting furnace for the three-step preparation of vanadium pentoxide, the melting furnace comprising a square columnar furnace body;
[0083] A burner 4 is provided at the center of the side of the square column furnace body; a feeding port 5 is provided at the top of the square column furnace body, and a discharge port is provided at the bottom;
[0084] A water beam assembly is provided inside the square columnar furnace body in a direction away from the burner 4, which divides the interior of the furnace body into a melting chamber 1 and a settling chamber 2.
[0085] The water beam assembly includes a water beam 3 and a water beam fire baffle 6 that are fitted together, with the water beam fire baffle 6 disposed between the water beam 3 and the burner 4.
[0086] According to the direction from the outside to the inside, the furnace wall of the square column furnace body includes a refractory fiber layer, a lightweight clay brick layer and a clay brick layer stacked together; the thickness of the refractory fiber layer is 55mm; the thickness of the lightweight clay brick layer is 120mm; and the thickness of the clay brick layer is 350mm.
[0087] A fire baffle 7 is provided on the inner surface of the furnace wall that is adjacent to both the furnace wall where the charging port 5 is located and the furnace wall where the burner 4 is located; the fire baffle 7 is a layer of chromium corundum bricks and the thickness of the fire baffle 7 is 120mm.
[0088] The minimum distance between the fire baffle 7 and the flame generated by the burner 4 is 487mm;
[0089] The distance between the feeding port 5 and the burner 4 is 1400mm; the radius of the feeding port 5 is 110mm; the feeding port 5 is located on the center line of the top of the square column furnace body;
[0090] The distance between the discharge port and the burner 4 is 4800mm; the diameter of the discharge port is 240mm.
[0091] The thickness of the water beam fireproof wall 6 is 120mm; the distance between the water beam fireproof wall 6 and the feeding port 5 is 3700mm;
[0092] The length of the rectangular furnace body is 10.5m and the width is 3.0m; the length of the melting chamber 1 is 5050mm and the length of the settling chamber 2 is 1300mm.
[0093] A comprehensive analysis of Examples 1-3 shows that this invention reduces the number of corrosion points by reducing the number of feeding ports to one. Simultaneously, single-pipe feeding ensures uninterrupted material flow within the feeding pipe, providing a cooling effect. Reducing the number of burners increases the distance between the flame and the furnace wall, significantly reducing the flame's impact on the furnace wall. Furthermore, the installation of a water-beam firebreak further slows down the corrosion of the water beam. In summary, this invention, by reducing the number of feeding corrosion points, minimizing the flame's impact on the furnace wall, and mitigating water beam corrosion, can extend the service life of the melting furnace to 12 months without affecting its normal operation, demonstrating excellent performance.
[0094] Example 4
[0095] This embodiment provides a melting furnace for the three-step preparation of vanadium pentoxide. The only difference between the melting furnace and that in Embodiment 1 is:
[0096] In this embodiment, the distance between the feed port 5 and the burner 4 is adjusted to 4000mm.
[0097] Compared with Example 1, the feeding port in this example is located close to the water beam, which causes the material to be far away from the high temperature zone (the feeding port at the front of the flame), making it difficult to melt and reducing the output; at the same time, a large amount of material enters the settling chamber.
[0098] Example 5
[0099] This embodiment provides a melting furnace for the three-step preparation of vanadium pentoxide. The only difference between the melting furnace and that in Embodiment 1 is:
[0100] In this embodiment, the thickness of the fire barrier 7 is adjusted to 100mm.
[0101] Example 6
[0102] This embodiment provides a melting furnace for the three-step preparation of vanadium pentoxide. The only difference between the melting furnace and that in Embodiment 1 is:
[0103] In this embodiment, the thickness of the fire barrier 7 is adjusted to 130mm.
[0104] Compared to Example 1, the thickness of the fire baffle wall in Example 5 is too low, which makes the furnace wall easy to burn through; the thickness of the fire baffle wall in Example 6 is too high, which will result in a smaller furnace volume and reduced output.
[0105] Example 7
[0106] This embodiment provides a melting furnace for the three-step preparation of vanadium pentoxide. The only difference between the melting furnace and that in Embodiment 1 is:
[0107] In this embodiment, the thickness of the water beam fire barrier 6 is adjusted to 100mm.
[0108] Example 8
[0109] This embodiment provides a melting furnace for the three-step preparation of vanadium pentoxide. The only difference between the melting furnace and that in Embodiment 1 is:
[0110] In this embodiment, the thickness of the water beam fire barrier 6 is adjusted to 130mm.
[0111] Compared to Example 1, Example 5 provides a lower thickness of the water beam fire baffle wall in the melting furnace, which will cause the flame to erode the water beam after the fire baffle wall is burned, reducing its service life; Example 6 provides a higher thickness of the water beam fire baffle wall in the melting furnace, which will cause the furnace volume to decrease and block the flow of molten material.
[0112] Example 9
[0113] This embodiment provides a melting furnace for the three-step preparation of vanadium pentoxide. The only difference between the melting furnace and that in Embodiment 1 is:
[0114] This embodiment omits the installation of the fire baffle 7 on the inner surface of the furnace wall.
[0115] Compared to Example 1, omitting the fire baffle 7 will cause the flame to directly wash over the water beam, thereby reducing the service life of the melting furnace.
[0116] Comparative Example 1
[0117] This comparative example provides a melting furnace for the three-step preparation of vanadium pentoxide, which differs from that of Example 1 only in that:
[0118] In this comparative example, two feeding ports are set on the top of the square columnar furnace body. The distance between one feeding port and the burner 4 is 1350mm, and the distance between the other feeding port and the burner 4 is adjusted to 4000mm.
[0119] Compared to Example 1, this comparative example increases the number of feeding ports to two, which leads to uneven material distribution at the feeding ports. The side without material feeding is severely eroded by the flame and is easily burned, thereby reducing the service life of the melting furnace.
[0120] Comparative Example 2
[0121] This comparative example provides a melting furnace for the three-step preparation of vanadium pentoxide, which differs from that of Example 1 only in that:
[0122] In this comparative example, two burners are vertically arranged along the center line of the side of the square columnar furnace body, and the minimum distance between the fire baffle and the flame produced by the burners is adjusted to 152mm.
[0123] Compared to Example 1, this comparative example increases the number of burners to 2, shortens the distance between the burners and the furnace wall, resulting in more severe scouring of the side walls by the flames, causing the furnace wall to burn through.
[0124] Comparative Example 3
[0125] This comparative example provides a melting furnace for the three-step preparation of vanadium pentoxide, which differs from that of Example 1 only in that:
[0126] This comparative example omits the installation of the water beam fire barrier.
[0127] Compared to Example 1, omitting the water beam firebreak will result in no cooling process during the material entering the settling chamber. The material will melt and clump in the settling chamber, making the system unable to operate and risking a reduction in the service life of the melting furnace.
[0128] In summary, by optimizing the number of charging ports and burners in the melting furnace, as well as modifying the furnace walls, this utility model can extend the service life of the melting furnace to 12 months without affecting its normal operation, and the effect is good.
[0129] The applicant declares that the above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.
Claims
1. A melting furnace for the three-step preparation of vanadium pentoxide, characterized in that, The melting furnace includes a square column-shaped furnace body; A burner is provided at the center of the side of the square columnar furnace body; a feeding port is provided at the top of the square columnar furnace body, and a discharge port is provided at the bottom; A water beam assembly is provided inside the square columnar furnace body in a direction away from the burner, dividing the interior of the furnace body into a melting chamber and a settling chamber. The water beam assembly includes a water beam and a water beam fire baffle that are fitted together, with the water beam fire baffle positioned between the water beam and the burner.
2. The melting furnace for the three-step preparation of vanadium pentoxide according to claim 1, characterized in that, According to the direction from the outside to the inside, the furnace wall of the square column furnace body includes a refractory fiber layer, a lightweight clay brick layer and a clay brick layer stacked together.
3. The melting furnace for the three-step preparation of vanadium pentoxide according to claim 2, characterized in that, The thickness of the refractory fiber layer is 45-55 mm; The thickness of the lightweight clay brick layer is 110–120 mm; The thickness of the clay brick layer is 340–350 mm.
4. The melting furnace for the three-step preparation of vanadium pentoxide according to claim 2, characterized in that, A fire baffle is installed on the inner surface of the furnace wall that is adjacent to both the furnace wall where the charging port is located and the furnace wall where the burner is located. The fire wall is a layer of chrome corundum bricks; The thickness of the fire barrier is 110-120mm.
5. The melting furnace for the three-step preparation of vanadium pentoxide according to claim 4, characterized in that, The minimum distance between the fire baffle and the flame produced by the burner is 482-487 mm.
6. The melting furnace for the three-step preparation of vanadium pentoxide according to claim 1, characterized in that, The distance between the feed port and the burner is 1300-1400 mm; The radius of the feeding port is 90–110 mm; The feeding port is located at the center line of the top of the square column furnace body.
7. The melting furnace for the three-step preparation of vanadium pentoxide according to claim 1, characterized in that, The distance between the discharge port and the burner is 4700-4800 mm; The diameter of the discharge port is 220-240 mm.
8. The melting furnace for the three-step preparation of vanadium pentoxide according to claim 1, characterized in that, The thickness of the water-beam fire barrier is 110-120mm; The distance between the water beam fireproof wall and the feeding port is 3600-3700mm.
9. The melting furnace for the three-step preparation of vanadium pentoxide according to claim 1, characterized in that, The length of the rectangular furnace body is 10–10.5 m; The width of the rectangular furnace body is 2.8 to 3.2 m.
10. The melting furnace for the three-step preparation of vanadium pentoxide according to claim 1, characterized in that, The length of the melting chamber is 5000–5050 mm; The length of the settling chamber is 1200-1300 mm.