Discharging device of vanadium pentoxide melting furnace
By installing a cooling discharge nozzle and circulation system at the discharge port of the vanadium pentoxide melting furnace, the problem of taphole erosion is solved, the service life is extended, the product quality is improved, the preheating and combustion support of the gas burner is achieved, and the cost is reduced.
Patent Information
- Application Number
- CN202422862424.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-23
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-11-23
AI Technical Summary
The taphole of the existing vanadium pentoxide melting furnace is easily corroded by high-temperature molten vanadium pentoxide, resulting in frequent material leakage, affecting production efficiency and product quality.
A first and a second discharge nozzle are set under the discharge port of the melting furnace. The two are arranged up and down and overlapped, and circulating cooling water is introduced into the inside. Combined with the circulation system of the cooling water tank and the heat exchange tube, the temperature of the iron outlet is reduced, and hot air is used to preheat the gas burner to assist combustion.
Extend the service life of the taphole, improve product quality, reduce maintenance and spare parts costs, realize preheating and combustion support of gas burners, and save water and fuel.
Smart Images
Figure CN223400139U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a discharging device, in particular to a discharging device for a vanadium pentoxide melting furnace. Background Art
[0002] Vanadium, a rare metal with a high melting point, and its compound, vanadium pentoxide (V2O5), are widely used in various industrial fields, including metallurgy, chemical engineering, organic chemical catalysts, inorganic chemicals, chemical reagents, enamels, and the production of magnetic materials. With the rapid development of science and technology, the application of vanadium has further expanded into high-tech fields, such as the manufacture of aviation-grade vanadium-aluminum alloys and the development of electrolytes for all-vanadium redox flow batteries.
[0003] In the field of ferrovanadium smelting, flake vanadium pentoxide offers superior usability. The production of flake vanadium pentoxide begins with sodium roasting of vanadium slag and water leaching of clinker to obtain a vanadium-containing solution. Subsequently, vanadium pentoxide is precipitated from the solution using an acidic ammonium salt precipitation method, and solid-liquid separation is performed to obtain powdered vanadium pentoxide. Finally, this powdered vanadium pentoxide is fed into a melting furnace, where it melts at high temperatures. The molten liquid flows out through the taphole and enters a water-cooled disc casting machine for cooling and solidification, ultimately forming flake vanadium pentoxide.
[0004] At present, since the temperature of molten vanadium pentoxide is above 690°C, the taphole of existing melting furnaces is a knotted structure of refractory materials, which is easily eroded by the high-temperature molten vanadium pentoxide, resulting in leakage and requiring frequent shutdowns for repairs, thus affecting production efficiency. At the same time, the knotted material after erosion of the taphole may enter the product, affecting the quality of the vanadium pentoxide. Utility Model Content
[0005] The technical problem to be solved by the utility model is to provide a vanadium pentoxide melting furnace discharging device which has a simple structure, can improve product quality and has a long service life.
[0006] The technical solution of the utility model is as follows:
[0007] A vanadium pentoxide melting furnace discharge device includes a melting furnace, a gas burner and a disc casting machine provided on one side of the melting furnace. The device is characterized in that a first discharge nozzle and a second discharge nozzle are supported by a cement base below the discharge port of the melting furnace, the first discharge nozzle and the second discharge nozzle are arranged vertically and overlap each other, the first discharge nozzle has a U-shaped cross-section and an inclined arc-shaped groove is provided on its top surface;
[0008] A cooling cavity is provided inside the first discharge nozzle and the second discharge nozzle, and a water inlet and a water outlet are provided at both ends of the first discharge nozzle and the second discharge nozzle, respectively, for passing cooling water to cool the two discharge nozzles;
[0009] A cooling water tank is provided on one side of the melting furnace. Cooling water and a heat exchange pipe are provided in the cooling water tank. The cooling water tank is connected to the cooling chambers of the second discharge nozzle and the first discharge nozzle in sequence through a circulation pipeline. A centrifugal pump is provided on the circulation pipeline to circulate the cooling water.
[0010] One end of the heat exchange tube is led out of the cooling water tank to the air inlet and connected to the centrifugal fan, and the other end is led out of the cooling water tank to the exhaust port and connected to the combustion-supporting air inlet of the gas burner; it is used to exchange heat with the circulating water entering the cooling water tank to form hot air to supply the gas burner.
[0011] As a further preference, the rear end of the first discharge nozzle is inserted into the discharge port of the melting furnace.
[0012] As a further preference, the water inlet and the water outlet are respectively located at the upper and lower ends of the first discharge nozzle and the second discharge nozzle.
[0013] As a further preference, the heat exchange tubes are serpentine coils and are arranged in multiple layers up and down in the cooling water tank to improve the heat exchange effect.
[0014] As a further preference, the first discharge nozzle and the second discharge nozzle are both cast iron parts.
[0015] The beneficial effects of the utility model are:
[0016] 1. A first discharge nozzle and a second discharge nozzle are provided below the discharge port of the melting furnace, the first discharge nozzle and the second discharge nozzle are arranged up and down and overlap each other, and circulating cooling water is introduced into the cooling cavity inside the first discharge nozzle and the second discharge nozzle. This not only reduces the temperature of the melting furnace taphole, but also solves the problems that the knotted structure of the melting furnace taphole is easily corroded and leaked by high-temperature molten vanadium pentoxide, requiring frequent furnace shutdowns for repairs, and the knotted material after corrosion enters the product and affects the quality of vanadium pentoxide; it also avoids the silicon and aluminum in the knotted material from corroding and entering the finished vanadium pentoxide, thereby improving the quality of the finished flaky vanadium pentoxide; and the melted liquid vanadium pentoxide can be spread as much as possible on the disc of the disc casting machine through the first discharge nozzle and the second discharge nozzle, so that the size and thickness of the finished vanadium pentoxide are uniform.
[0017] 2. The structure is simple, economical and durable. The service life of the taphole can be extended from the original 2 to 6 months to more than 5 years, which greatly reduces the cost of maintenance and replacement of spare parts. The air-cooled circulating cooling water is realized by the heat exchange tubes arranged in the cooling water tank, which can save 30 to 50 cubic meters of water per hour. At the same time, the hot air at the outlet of the heat exchange tube is connected with the combustion-supporting air inlet of the gas burner, which can realize the preheating and combustion-supporting of the gas burner fuel, and truly achieve energy saving and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural diagram of the present utility model.
[0019] Figure 2 yes Figure 1 AA cross-sectional view.
[0020] Figure 3 It is a structural cross-sectional view of the cooling water tank.
[0021] In the figure: melting furnace 1, first discharge nozzle 2, second discharge nozzle 3, disc casting machine 4, centrifugal pump 5, centrifugal fan 6, cooling water tank 7, circulation pipeline 8, gas burner 9, cement seat 10, water inlet 11, water outlet 12, heat exchange tube 13. DETAILED DESCRIPTION
[0022] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0023] like Figure 1-Figure 3 As shown, the utility model relates to a vanadium pentoxide melting furnace discharging device, including a melting furnace 1, a gas burner 9 and a disc casting machine 4 are provided on one side of the melting furnace 1, and the disc casting machine 4 is located on one side of the discharge port of the melting furnace 1; a first discharge nozzle 2 and a second discharge nozzle 3 are supported by a cement seat 10 below the discharge port of the melting furnace 1, and the first discharge nozzle 2 and the second discharge nozzle 3 are arranged up and down and overlap each other; the rear end of the first discharge nozzle 2 is inserted into the discharge port of the melting furnace 1, the cross-section of the first discharge nozzle 2 is U-shaped and an inclined arc groove 201 is provided on its top surface, and the second discharge nozzle 3 is located above the disc casting machine 4, so that the liquid vanadium pentoxide after melting passes through the first discharge nozzle 2 and the second discharge nozzle 3 for preliminary cooling and then enters the disc casting machine 4.
[0024] The first discharge nozzle 2 and the second discharge nozzle 3 are both cast iron parts, and cooling chambers are respectively provided inside the first discharge nozzle 2 and the second discharge nozzle 3. Water inlets 11 and water outlets 12 connected to the cooling chambers are respectively provided at both ends of the first discharge nozzle 2 and the second discharge nozzle 3, for passing cooling water to cool the two discharge nozzles; the water inlet 11 and the water outlet 12 are respectively located at the upper and lower ends of the first discharge nozzle 2 and the second discharge nozzle 3 to improve the cooling effect.
[0025] A cooling water tank 7 is also provided on one side of the melting furnace 1. Cooling water and a heat exchange pipe 13 are installed in the cooling water tank 7. The cooling water tank 7 is connected to the cooling chambers of the second discharge nozzle 3 and the first discharge nozzle 2 in sequence through a circulation pipeline 8. A centrifugal pump 5 is provided on the circulation pipeline 8 to realize the circulation of cooling water.
[0026] The circulation pipeline 8 includes an upper water pipe connected between the cooling water tank 7 and the water inlet of the second discharge nozzle 3, a connecting pipe connected between the water outlet of the second discharge nozzle 3 and the water inlet of the first discharge nozzle 2, and a return water pipe connecting the water outlet of the first discharge nozzle 2 and the cooling water tank 7. The centrifugal pump 5 is installed on the upper water pipe, and valves are respectively provided on the upper water pipe and the return water pipe.
[0027] One end of the heat exchange tube 13 is led from the cooling water tank 7 to the air inlet and connected to the centrifugal fan 6. The other end is led from the cooling water tank 7 to the exhaust port and connected to the combustion-supporting air inlet of the gas burner 9 via a pipeline. The heat exchange tube 13 is used to exchange heat with the circulating water entering the cooling water tank 7, generating hot air to supply the gas burner 9. The heat exchange tube 13 is a serpentine coil and is arranged in multiple layers vertically within the cooling water tank 7 to improve heat exchange efficiency.
[0028] During operation, the centrifugal pump 5 and the centrifugal fan 6 are started, and the cooling water in the cooling water tank 7 is sequentially introduced into the second discharge nozzle 3 and the first discharge nozzle 2 through the centrifugal pump 5, thereby reducing the tapping temperature of the melting furnace 1; at the same time, the liquid vanadium pentoxide melted in the melting furnace 1 can be spread as much as possible onto the disc of the disc casting machine 4 through the first discharge nozzle 2 and the second discharge nozzle 3, so that the size and thickness of the finished vanadium pentoxide can be uniform.
[0029] When the centrifugal fan 6 is working, the compressed air generated by the external air compressor can be introduced into the heat exchange pipe 13 inside the cooling water tank 7, which can reduce the temperature of the circulating cooling water in the cooling water tank 7; at the same time, the hot compressed air after heat exchange enters the gas burner 9 of the melting furnace 1 through the pipeline, which can improve the preheating and combustion-supporting effects of natural gas combustion.
[0030] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.
Claims
1. A vanadium pentoxide melting furnace discharge device, comprising a melting furnace, a gas burner and a disc casting machine are provided on one side of the melting furnace, wherein: A first discharge nozzle and a second discharge nozzle are supported by a cement base below the discharge port of the melting furnace. The first discharge nozzle and the second discharge nozzle are arranged up and down and overlap each other. The cross section of the first discharge nozzle is U-shaped and an arc-shaped groove arranged obliquely is provided on its top surface. A cooling cavity is provided inside the first discharge nozzle and the second discharge nozzle, and a water inlet and a water outlet are provided at both ends of the first discharge nozzle and the second discharge nozzle, respectively, for passing cooling water to cool the two discharge nozzles; A cooling water tank is provided on one side of the melting furnace. Cooling water and a heat exchange pipe are provided in the cooling water tank. The cooling water tank is connected to the cooling chambers of the second discharge nozzle and the first discharge nozzle in sequence through a circulation pipeline. A centrifugal pump is provided on the circulation pipeline to circulate the cooling water. One end of the heat exchange tube is led out of the cooling water tank to the air inlet and connected to the centrifugal fan, and the other end is led out of the cooling water tank to the exhaust port and connected to the combustion-supporting air inlet of the gas burner; it is used to exchange heat with the circulating water entering the cooling water tank to form hot air to supply the gas burner.
2. The vanadium pentoxide melting furnace discharging device according to claim 1, characterized in that: The rear end of the first discharge nozzle is inserted into the discharge port of the melting furnace.
3. A vanadium pentoxide melting furnace discharge device according to claim 1 or 2, characterized in that: The water inlet and the water outlet are respectively located at the upper and lower ends of the first discharge nozzle and the second discharge nozzle.
4. The vanadium pentoxide melting furnace discharging device according to claim 1, characterized in that: The heat exchange tubes are serpentine coils and are arranged in multiple layers up and down in the cooling water tank to improve the heat exchange effect.
5. The vanadium pentoxide melting furnace discharging device according to claim 3, characterized in that: The first discharge nozzle and the second discharge nozzle are both cast iron parts.