Modular high intensity magnetic device for high temperature tin fume duct deironing

Abstract

The utility model discloses a modularization strong magnet device for high temperature tin smoke dust pipeline removes iron, include: casing, outer box and second strong magnet block, casing's both ends are open -mouthed, and the outer box sets up in the inside of casing, and the inside of the outer box conical wall is equipped with first strong magnet block, and the bottom end lateral wall of casing is to the inside inclined shape, and second strong magnet block installs in the outside of casing bottom inclined wall. Modularization strong magnet device in the utility model can bear high temperature, and high -efficient deironing.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, and more specifically to a modular strong magnetic device for removing iron from high-temperature tin fume pipelines. Background Technology

[0002] In the tin smelting process, crude tin is produced by smelting tin ore in a top-blown furnace, which generates a large amount of tin-containing dust. This dust is collected by an electrostatic precipitator and then sent to a dust storage bin via a scraper conveyor, screw conveyor, and other equipment. Finally, it is returned to the top-blown furnace for smelting via a pneumatic conveyor using a disc feeder.

[0003] However, during the conveying process, ferrous impurities (such as debris from equipment wear and tear) can mix with the fumes. If these ferrous impurities enter the disc feeder, they can easily cause the equipment to jam. Once jammed, the disc feeder must be shut down and disassembled for cleaning, taking at least 4 hours each time. In severe cases, it can even force the entire top-blown furnace smelting system to shut down, causing huge economic losses. Furthermore, the temperature of tin fumes reaches approximately 140°C, further increasing the difficulty and risk of manual disassembly. Currently, non-ferrous impurities have been addressed using agglomeration and crushing devices, but the effective removal of ferrous impurities remains a challenge for the industry.

[0004] Currently available sealed iron separators on the market mostly use neodymium iron boron magnets (NdFeB magnets) for their magnetic attraction components, which have a temperature resistance limit of only about 60℃. Experiments have shown that at a high temperature of 140℃, neodymium magnets experience severe magnetic attenuation and cannot effectively attract ferrous impurities, thus completely failing to meet the requirements of this process.

[0005] Therefore, we studied a modular strong magnetic device that can withstand high temperatures and efficiently remove iron. Utility Model Content

[0006] In view of this, the present invention provides a modular strong magnetic device that can withstand high temperatures, efficiently remove iron, and is easy to maintain online. To achieve the above objectives, the present invention adopts the following technical solution: A modular strong magnetic device for removing iron from high-temperature tin fume pipelines, comprising: A housing, wherein both ends of the housing are open; An outer box is disposed inside the housing, and a first strong magnetic block is installed on the inner side of the conical wall of the outer box; The second strong magnetic block is installed on the outside of the inclined side wall at the bottom of the housing.

[0007] The beneficial effect of adopting the above technical solution is that it achieves a dual iron removal path through the first strong magnetic block and the second strong magnetic block, thereby improving the iron removal efficiency.

[0008] Preferably, both the first and second strong magnetic blocks are samarium cobalt strong magnetic blocks. Samarium cobalt magnets can withstand temperatures up to 350℃, solving the problem of demagnetization of traditional neodymium iron boron magnets at high temperatures (140℃); ensuring long-term stable operation of the device under high-temperature conditions and improving system reliability.

[0009] Preferably, the outer box contains an inner box with the same shape, and the first strong magnetic block is disposed between the outer box and the inner box. This improves the stability of the magnetic block and prevents it from loosening or falling off; the outer box structure protects the magnetic block and extends its service life.

[0010] Preferably, a fixing frame is provided between the inner walls of the housing, and the outer box and inner box are mounted on top of the fixing frame. This provides stable support and ensures that the magnetic box does not shift under the impact of high-temperature smoke and dust.

[0011] Preferably, a mounting plate is installed on the outer side of the inclined wall at the bottom of the housing, and the second strong magnet is disposed between the mounting plate and the inclined wall at the bottom of the housing. The mounting plate ensures that the second magnet is securely installed and easy to replace; moreover, the mounting plate protects the second strong magnet.

[0012] Preferably, an annular air-blowing pipe is provided on the inner wall of the housing, the air-blowing pipe is located above the inclined plate at the bottom of the housing, and the bottom surface of the air-blowing pipe has multiple blowing holes. This achieves a blowing function and prevents smoke and dust from covering the magnetic force, causing attenuation or blockage.

[0013] Preferably, both the first and second strong magnetic blocks are modularly distributed. This allows for quick assembly and disassembly of the magnetic blocks and partial replacement, reducing maintenance costs.

[0014] Preferably, the side wall of the housing has an inspection port, and an inspection door is installed at the inspection port. This enables online maintenance without stopping the entire device for disassembly.

[0015] Preferably, a door pressure bar is provided on the outer side of the inspection door, and a pin is rotatably connected to the housing near the opening side of the inspection door. The pin is connected to a screw arranged perpendicularly to it, and a clamping plate is threadedly connected to the end of the screw away from the pin. A groove is provided on the end of the door pressure bar near the screw for the screw to be inserted. The locking structure is simple and reliable, and easy to operate; it ensures a tight seal on the inspection door, preventing smoke and dust leakage; and it improves operational safety and sealing performance.

[0016] Preferably, a sealing strip is provided at the contact point between the inspection port and the inspection door.

[0017] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a modular strong magnetic device for removing iron from high-temperature tin fume pipelines, the beneficial effects of which are: (1) This device uses a samarium-cobalt strong magnet with a temperature resistance of up to 350℃, which completely solves the problem of high-temperature demagnetization of neodymium magnets. Through the dual design of primary conical adsorption and secondary inclined plane adsorption, the iron removal efficiency is improved; (2) The modular magnet design and convenient access doors on both sides make it possible to clean iron impurities and replace magnets without disassembling the entire device, enabling rapid online maintenance and greatly reducing downtime. (3) The annular air blowing pipe can effectively blow away the smoke and dust covering the outer box, the inclined wall at the bottom of the shell, and iron impurities, preventing blockage and magnetic shielding problems caused by smoke and dust accumulation, and ensuring the long-term stable operation of the device. (4) It fundamentally solved the production bottleneck of the disc feeder that is stuck due to iron impurities, avoided unplanned downtime, and improved the continuity and economic benefits of the entire smelting system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 A schematic diagram of the external structure of the modular strong magnetic device provided by this utility model; Figure 2 Provided by this utility model Figure 1 Enlarged view of the structure at point A in the middle; Figure 3 A schematic diagram of the internal structure of the modular strong magnetic device provided by this utility model; Figure 4 An exploded view of the modular strong magnetic device provided by this utility model.

[0020] In the figure, 1-Shell; 2-Outer box; 3-First strong magnet; 4-Second strong magnet; 5-Inner box; 6-Fixing bracket; 7-Mounting plate; 8-Air inlet; 9-Inspection door; 10-Door pressure bar; 11-Pin; 12-Screw; 13-Pressure plate; 14-Groove; 15-Sealing strip; 16-Tin fume discharge pipe; 17-High temperature tin fume; 18-Iron impurities. Detailed Implementation

[0021] 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.

[0022] This utility model discloses a modular strong magnetic device for removing iron from high-temperature tin fume pipelines, comprising: The housing 1 has open ends; Outer box 2 is located inside the shell 1, and a first strong magnetic block 3 is installed on the inner side of the conical wall of the outer box 2; The second strong magnet 4 is installed on the outer side of the bottom inclined wall of the housing 1. The housing 1 is made entirely of 304 stainless steel with a thickness of 4mm and a total height of 1360mm. It has connecting flanges at both the top and bottom. The middle part of the housing 1 is a 760mm×760mm square cavity, and the top and bottom ends are connected to the connecting flanges through a 300mm high reducing section. The stainless steel material not only withstands high temperatures of 140℃, but also avoids the shielding and consumption of magnetic force by ordinary steel, realizing sealed transportation throughout the process and preventing the leakage of smoke and dust.

[0023] In one embodiment, both the first strong magnetic block 3 and the second strong magnetic block 4 are samarium cobalt strong magnetic blocks. The samarium cobalt strong magnetic blocks can withstand temperatures up to 350°C, completely solving the problem of high-temperature demagnetization of neodymium magnets; and through the dual adsorption effect of the first strong magnetic block 3 and the second strong magnetic block 4, the iron removal efficiency can be improved.

[0024] In one embodiment, both the first strong magnetic block 3 and the second strong magnetic block 4 are modularly distributed. This distribution method allows for replacement of magnetic blocks without disassembling the entire device, improving the convenience of replacement.

[0025] In one embodiment, an inner box 5 with the same shape as the outer box 2 is provided inside the outer box 2, and a first strong magnetic block 3 is disposed between the outer box 2 and the inner box 5. The inner box 5 and the outer box 2 can press and fix the first strong magnetic block 3, while the outer box 5 can protect the first strong magnetic block 3.

[0026] In one embodiment, a fixing frame 6 is provided between the inner walls of the housing 1, and the outer box 2 and the inner box 5 are mounted on top of the fixing frame 6. The outer box 2 is fixed to the fixing frame 6 welded inside the housing 1 by bolts.

[0027] In one embodiment, an mounting plate 7 is installed on the outer side of the bottom inclined wall of the housing 2, and a second strong magnetic block 4 is disposed between the mounting plate 7 and the bottom inclined plate of the housing 1. The mounting plate 7 protects the second strong magnetic block 4, and the second strong magnetic block 4 is fixed to the mounting plate 7 by bolts. The mounting plate 7 is fixed to the bottom inclined wall of the housing 1 by bolts.

[0028] In one embodiment, an annular air-blowing pipe is provided on the inner wall of the housing 1, and the air-blowing pipe is located above the inclined plate at the bottom of the housing 1. The bottom surface of the air-blowing pipe has multiple blowing holes. The annular air-blowing of the air-blowing pipe can effectively blow away the soot covering the inclined wall at the bottom of the housing 1 and the iron impurities, preventing blockage and magnetic shielding problems caused by soot accumulation, and ensuring the long-term stable operation of the device.

[0029] In one embodiment, an air inlet 8 is provided on the outside of the housing 1. The air inlet 8 is connected to an air blowing pipe and an external compressed air source. Through experiments, the working air pressure is preferably 0.2 MPa for the best effect.

[0030] In one embodiment, the side wall of the housing 1 has an inspection port, and an inspection door 9 is installed at the inspection port. The convenient inspection doors 9 on both sides can periodically clean the adsorbed iron impurities, realizing rapid online maintenance and greatly reducing downtime.

[0031] In one embodiment, a door pressure bar 10 is provided on the outer side of the access door 9. A pin 11 is rotatably connected to the housing 1 near the opening side of the access door 9. The pin 11 is connected to a screw 12 arranged perpendicularly to it. A clamping plate 13 is threadedly connected to the end of the screw 12 away from the pin 11. A groove 14 is provided at the end of the door pressure bar 10 near the screw 12 for the screw 12 to be inserted. When it is necessary to lock the access door 9, the screw 12 is rotated so that the screw 12 is embedded in the groove 14, and the clamping plate is rotated so that the clamping plate 13 presses the door pressure bar 10, thus locking the access door 9. When opening the access door 9, the clamping plate 13 is released and the screw 12 is rotated out of the groove 14.

[0032] In one embodiment, a sealing strip 15 is provided at the contact point between the access port and the access door 9. The sealing strip 15 can increase the sealing performance at the connection between the access port and the access door 9.

[0033] Work process: High-temperature tin fumes (approximately 140°C) fall vertically into the shell 1 through the opening at the top. First, they pass through the conical outer box 2 equipped with a first strong magnetic block 3. The conical structure alters the flow direction of the fumes, extending their residence time, and most iron impurities are captured by the first strong magnetic block 3. Iron impurities that are not captured and fall after changing direction are recaptured by the inclined wall of the shell 1, which is equipped with a second strong magnetic block 4, as they fall to the lower diameter transition section of the shell 1. The adsorbed iron impurities can be cleaned periodically by operators (e.g., at the end of each furnace shift) by opening the maintenance doors 9 on both sides. Simultaneously, compressed air at 0.2 MPa is continuously introduced through the annular air blowing pipe to sweep away the fumes surrounding the adsorbed iron impurities, preventing fumes accumulation and blockage, and ensuring a sustained and effective iron removal process.

[0034] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A modular strong magnetic device for removing iron from high-temperature tin fume pipelines, characterized in that, include: A housing, wherein both ends of the housing are open; An outer box is disposed inside the housing, and a first strong magnetic block is installed on the inner side of the conical wall of the outer box; The second strong magnetic block is installed on the outside of the inclined side wall at the bottom of the housing.

2. The modular strong magnetic device for removing iron from high-temperature tin fume pipelines according to claim 1, characterized in that, Both the first and second strong magnetic blocks are samarium cobalt strong magnetic blocks.

3. A modular strong magnetic device for removing iron from high-temperature tin fume pipelines according to claim 2, characterized in that, The outer box has an inner box with the same shape, and the first strong magnetic block is disposed between the outer box and the inner box.

4. A modular strong magnetic device for removing iron from high-temperature tin fume pipelines according to claim 3, characterized in that, A fixing frame is provided between the inner walls of the housing, and the outer box and the inner box are installed on the top of the fixing frame.

5. A modular strong magnetic device for removing iron from high-temperature tin fume pipelines according to claim 1, characterized in that, An installation plate is mounted on the outer side of the inclined wall at the bottom of the housing, and the second strong magnetic block is disposed between the installation plate and the inclined wall at the bottom of the housing.

6. A modular strong magnetic device for removing iron from high-temperature tin fume pipelines according to claim 1, characterized in that, An annular air-blowing pipe is provided on the inner wall of the housing. The air-blowing pipe is located above the inclined plate at the bottom of the housing, and multiple air-blowing holes are opened on the bottom surface of the air-blowing pipe.

7. A modular strong magnetic device for removing iron from high-temperature tin fume pipelines according to claim 6, characterized in that, Both the first and second strong magnetic blocks are modularly distributed.

8. A modular strong magnetic device for removing iron from high-temperature tin fume pipelines according to claim 1, characterized in that, The side wall of the housing is provided with an inspection port, and an inspection door is installed at the inspection port.

9. A modular strong magnetic device for removing iron from high-temperature tin fume pipelines according to claim 8, characterized in that, A door pressure bar is provided on the outside of the inspection door. A pin is rotatably connected to the housing near the opening of the inspection door. A screw is connected to the pin and arranged perpendicularly thereto. A pressure plate is threaded to the end of the screw away from the pin. A groove is provided on the end of the door pressure bar near the screw for the screw to be inserted.

10. A modular strong magnetic device for removing iron from high-temperature tin fume pipelines according to claim 9, characterized in that, A sealing strip is provided at the contact point between the inspection port and the inspection door.

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