Waste gas recovery and purification device for nodulizer smelting and demolding

Abstract

The utility model relates to the technical field of spheroidizing agent production, in particular to a waste gas recycling and purifying device for spheroidizing agent smelting and demolding, which comprises a mounting table, a recycling chamber is arranged on the mounting table, a mold is placed in the recycling chamber, a lifting device is arranged at the top of the recycling chamber, and a forced cooling shell is fixedly connected onto a lifting rod of the lifting device. A forced cooling fan is arranged in the forced cooling shell and used for rapidly sucking air outside the recovery chamber into the recovery chamber, a filter box is further arranged on the mounting table, a filter cavity is formed in the filter box, a filter element is arranged in the filter cavity, and a first air channel and a second air channel are formed in the two side faces of the recovery chamber correspondingly. A first fan and a second fan are arranged in the first air channel and the second air channel respectively, the first fan is arranged in the first air channel and used for sucking waste gas in the recovery chamber into the filter box, and the second fan is arranged in the second air channel and used for sucking gas filtered by the filter box into the recovery chamber again.

Description

Technical Field

[0001] The utility model relates to the technical field of spheroidizing agent production, in particular to a waste gas recovery and purification device for spheroidizing agent smelting and demoulding. Background Art

[0002] Nodularizers are metals or alloys added to molten iron to produce spheroidal graphite cast iron. Numerous types exist, primarily including magnesium-silicon alloys, rare-earth magnesium-silicon alloys, calcium alloys, nickel-magnesium alloys, pure magnesium alloys, and rare-earth alloys. Currently, ferrosilicon and rare-earth magnesium are commonly used in China. The production process primarily involves preparing raw materials such as silicon, magnesium powder, lime, limestone, calcium, recarburizer, iron powder, and rare-earth elements. These raw materials are then added to a reactor and heated to 900°C for smelting. After smelting, the molten metal is poured into an ingot mold and cooled to form the basic shape of the nodularizer. Finally, the mold is cooled and processed to produce the final product. Because the magnesium component in the alloy is extremely reactive, insufficient cooling during demolding can cause a violent reaction with cold air, increasing magnesium loss and threatening production safety.

[0003] To address the above technical issues, Chinese patent CN115351265A discloses a demolding device for spheroidizing agent production, comprising: a base, a mold body, a detection assembly, and a controller assembly. The bases are arranged in pairs; the mold body is rotatably disposed between the paired bases; the detection assembly is disposed on the mold body; and the controller assembly is connected to both the mold body and the detection assembly. The above patent controls the demolding time based on the temperature of the cooling water flowing out of the cooling water chamber used to cool the alloy ingot. This allows for better control of the demolding timing, allowing demolding to occur at lower cooling temperatures. This helps lower the temperature of the alloy ingot and reduces the reaction between the magnesium in the alloy ingot and air, reducing magnesium waste and improving the safety of spheroidizing agent production. However, during demolding, the temperature difference between the alloy ingot and the outside air remains large, which can cause the magnesium component in the alloy ingot to directly come into contact with the cold air, triggering a reaction, thereby affecting product quality and production safety. Furthermore, the demolding process generates high-temperature exhaust gas, which contains pollutants such as metal oxides, non-metal oxides, volatile organic compounds (VOCs), smoke, and oil mist. These waste gases are usually hot, corrosive, and acidic when dissolved in water, posing a potential threat to the environment and human health.

[0004] Therefore, it is necessary for technical personnel in this field to provide a waste gas recovery and purification device for spheroidizing agent smelting and demolding to recover and filter the high-temperature waste gas, and use the high-temperature waste gas to increase the demolding environment temperature, thereby reducing the temperature difference between the alloy ingot and the outside, ensuring the safety and stability of alloy ingot production, and improving product quality. Utility Model Content

[0005] The utility model aims to provide a waste gas recovery and purification device for smelting and demolding of a spheroidizer, so as to solve the technical problems in the prior art that ferrosilicon rare earth magnesium spheroidizers are prone to generate waste gas during demolding, polluting the environment, and at the same time, the temperature difference is large during demolding, and the magnesium component in the ferrosilicon rare earth magnesium spheroidizers will directly contact with the cold air to induce a reaction, thereby affecting product quality and production safety.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a waste gas recovery and purification device for spheroidizing agent smelting and demoulding, including a mounting platform, a recovery chamber is provided on the mounting platform, the recovery chamber is used to place the mold, a lifting device is provided on the top of the recovery chamber, a strong cooling shell is fixedly connected to the lifting rod of the lifting device, a strong cooling fan is provided in the strong cooling shell, the strong cooling fan is used to quickly draw the air outside the recovery chamber into the recovery chamber, a filter box is also provided on the mounting platform, a filter cavity is formed inside the filter box, a filter core is provided in the filter cavity, and two sides of the recovery chamber are respectively provided with The first air duct and the second air duct, one end of the first air duct and the second air duct passes through the recovery chamber and is connected to the internal cavity of the recovery chamber, the other end of the first air duct and the second air duct passes through the filter box and is connected to the filter cavity, the openings of the first air duct and the second air duct on the filter box are respectively located on both sides of the filter element, the first air duct and the second air duct are respectively provided with a first fan and a second fan, the first air duct and the second air duct are arranged opposite to each other, the first fan is arranged in the first air duct, for sucking the exhaust gas in the recovery chamber into the filter box, the second fan is arranged in the second air duct, for sucking the gas filtered by the filter box back into the recovery chamber.

[0007] Further, the openings of the first air channel and the second air channel on the recovery chamber are located between the top of the recovery chamber and the top of the mold.

[0008] Furthermore, the forced cooling shell is a square shell structure with an open side. The forced cooling shell is located between the top of the recovery chamber and the top of the mold. The open side of the forced cooling shell faces the inner wall of the recovery chamber. Ventilation holes are provided on the wall of the forced cooling shell away from the open side.

[0009] Furthermore, the recovery chamber is a square shell-like structure with an open side, and a chamber door is rotatably provided on the open surface of the recovery chamber. A track is provided on the plane of the mounting platform, and the track extends from the outside of the recovery chamber to the inside of the recovery chamber. The track is located below the chamber door, and the mold is slidably arranged on the track and can slide along the extension direction of the track, and the mold is loaded with molten spheroidizer metal liquid.

[0010] Furthermore, a telescopic cylinder is provided at the top of the recovery chamber, and a telescopic rod of the telescopic cylinder passes through the top of the recovery chamber and extends into the internal cavity of the recovery chamber, with the telescopic rod of the telescopic cylinder facing the top of the mold. A hook is fixedly connected to the end of the telescopic rod of the telescopic cylinder, and a hanging ear is provided at the top of the mold, and the hook can be hooked onto the hanging ear.

[0011] Furthermore, the filter core is made of polypropylene hot-sprayed fiber membrane.

[0012] Furthermore, the lifting device is a screw lift.

[0013] The beneficial effects of the utility model are as follows: the utility model uses the strong cooling shell to force-cool the mold, thereby reducing the temperature of the mold before demolding, and then uses the filter box and the first fan and the second fan therein to circulate the air in the recovery room, thereby increasing the temperature in the recovery room, and then increasing the temperature that the spheroidizing agent in the mold contacts during demolding, thereby reducing the temperature difference, preventing a large amount of magnesium loss, and ensuring production safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the waste gas recovery and purification device for spheroidizing agent smelting and demoulding of the utility model.

[0015] Figure 2 It is an exploded view of the waste gas recovery and purification device for spheroidizing agent smelting and demoulding of the utility model.

[0016] Figure 3 The utility model is a front view of the waste gas recovery and purification device for spheroidizing agent smelting and demoulding.

[0017] Figure 4 It is a top view of the waste gas recovery and purification device for spheroidizing agent smelting and demoulding of the present invention.

[0018] Figure 5 yes Figure 4 Cross-sectional view along AA.

[0019] Figure 6 yes Figure 4 Cross-sectional view along BB.

[0020] Figure 7 yes Figure 4 Cross-sectional view along CC.

[0021] The components in the accompanying drawings are marked as follows: 10. Mounting table; 11. Recovery chamber; 12. Chamber door; 13. Track; 14. Mold; 15. Lifting device; 16. Forced cooling shell; 17. Telescopic cylinder; 18. Hook; 19. Hanging ear; 20. Filter box; 21. First air duct; 22. Second air duct; 23. Filter cavity; 24. Filter element; 25. First fan; 26. Second fan. DETAILED DESCRIPTION

[0022] The present invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0023] See also Figure 1 、 Figure 3 、 Figure 4 The utility model provides a waste gas recovery and purification device for spheroidizing agent smelting and demolding, including a mounting platform 10, on which a recovery chamber 11 is provided. The recovery chamber 11 is a square shell structure with an open side. A chamber door 12 is rotatably provided on the opening surface of the recovery chamber 11. The chamber door 12 is used to control the opening and closing of the recovery chamber 11, thereby reducing the overflow of waste gas inside the recovery chamber 11 during the demolding process, reducing environmental pollution and ensuring the safety of the processing environment.

[0024] A track 13 is provided on the upper plane of the mounting platform 10. The track 13 extends from the outside of the recovery chamber 11 to the inside of the recovery chamber 11. The track 13 is located below the chamber door 12 to ensure the stability of the opening and closing of the chamber door 12. The recovery chamber 11 is used to place a mold 14. The mold 14 is slidably arranged on the track 13 and can slide along the extension direction of the track 13 to ensure the stability of the movement of the mold 14. The mold 14 is loaded with molten spheroidizing agent metal liquid. When in use, after the mold 14 cools to a set temperature, the mold 14 is placed on the track 13 and pushed into the recovery chamber 11 along the track 13. The recovery chamber 11 is closed and the mold 14 is opened. At this time, the mold 14 still has a relatively high temperature. The utility model places the mold 14 in an independent recovery chamber 11, so that the opening and closing process of the mold 14 is isolated from the operator, thereby ensuring safety. At the same time, the closed recovery chamber 11 is used to block and recycle waste gas, reducing environmental pollution.

[0025] In this embodiment, a first positioning hole (not shown in the figure) is further provided at the bottom of the mold 14, and a second positioning hole (not shown in the figure) is further provided on the upper surface of the track 13 located in the recovery chamber 11. The first positioning hole can be directly opposite to the second positioning hole. A pin (not shown in the figure) is connected in cooperation with the first positioning hole. The pin passes through the first positioning hole and extends into the second positioning hole, so as to achieve accurate positioning of the mold 14 on the track 13 and ensure the stability of the demolding process.

[0026] Further, see Figure 2 、 Figure 5A telescopic cylinder 17 is provided at the top of the recovery chamber 11. The telescopic rod of the telescopic cylinder 17 passes through the top of the recovery chamber 11 and extends into the internal cavity of the recovery chamber 11. The telescopic rod of the telescopic cylinder 17 is directly opposite the top of the mold 14. A hook 18 is fixedly connected to the end of the telescopic rod of the telescopic cylinder 17. A hanging ear 19 is provided at the top of the mold 14. The hook 18 can be hooked onto the hanging ear 19 to realize the opening and closing of the end cover of the mold 14.

[0027] In this embodiment, the telescopic cylinder 17 includes but is not limited to a hydraulic cylinder, and the hook 18 and the hanging ear 19 are common hooks and hanging ears on the market, which can be purchased directly when used. The specific structure will not be described in detail here.

[0028] In this embodiment, a lifting device 15 is further provided at the top of the recovery chamber 11 near the chamber door 12, and a forced cooling shell 16 is fixedly connected to the lifting rod of the lifting device 15. The forced cooling shell 16 is a square shell structure with an open side. The forced cooling shell 16 is located between the top of the recovery chamber 11 and the top of the mold 14. The open surface of the forced cooling shell 16 faces the inner wall of the recovery chamber 11. A ventilation hole (not shown in the figure) is provided on the wall of the forced cooling shell 16 away from the open surface. A forced cooling fan (not shown in the figure) is provided in the forced cooling shell 16. The forced cooling fan is used to quickly draw air from the outside of the recovery chamber 11 into the inside of the recovery chamber 11.

[0029] Before mold 14 is opened, it is very hot. At this time, chamber door 12 is opened and the forced cooling fan is activated to cool mold 14, ensuring that the mold opening temperature drops to an appropriate range. After mold 14 is opened, the heat dissipated directly faces the opening surface of forced cooling housing 16. The forced cooling fan cools mold 14, improving processing efficiency and ensuring sufficient cooling of mold 14. This prevents a violent reaction between the magnesium inside and the cold air during demolding, reduces magnesium loss, and ensures production safety.

[0030] The lifting device 15 includes but is not limited to a screw lift.

[0031] See also Figure 6 、 Figure 7 A filter box 20 is also provided on the mounting platform 10. The filter box 20 is located on the side of the recovery chamber 11 away from the chamber door 12. The filter box 20 is a square shell structure with a hollow interior. A filter cavity 23 is formed inside the filter box 20. A filter element 24 is provided in the filter cavity 23. The filter element 24 is made of a polypropylene hot-sprayed fiber membrane.

[0032] The recovery chamber 11 is provided with a first air channel 21 and a second air channel 22 on two adjacent sides of the opening. The first air channel 21 and the second air channel 22 respectively penetrate the wall of the recovery chamber 11 and communicate with the internal cavity of the recovery chamber 11. The first air channel 21 and the second air channel 22 are arranged opposite each other, and the openings of the first air channel 21 and the second air channel 22 on the recovery chamber 11 are located between the top of the recovery chamber 11 and the top of the mold 14.

[0033] The first air duct 21 and the second air duct 22 are also respectively arranged at the two ends of the filter box 20. The first air duct 21 and the second air duct 22 respectively penetrate the wall of the filter box 20 and are connected to the filter cavity 23. The openings of the first air duct 21 and the second air duct 22 on the filter box 20 are respectively located on both sides of the filter element 24. The filter element 24 is used to separate the first air duct 21 and the second air duct 22 from each other to ensure the adequacy of the exhaust gas filtration.

[0034] A first fan 25 and a second fan 26 are respectively provided in the first air duct 21 and the second air duct 22 near the opening on the recovery chamber 11. The first fan 25 is provided in the first air duct 21 to draw the exhaust gas in the recovery chamber 11 into the filter box 20. The second fan 26 is provided in the second air duct 22 to draw the gas filtered by the filter box 20 back into the recovery chamber 11.

[0035] The present invention utilizes a filter box 20 to filter the exhaust gas. The filtered exhaust gas still has a certain temperature. To ensure uniform cooling of the mold 14, the present invention re-sucks the filtered gas into the recovery chamber 11. The gas at a certain temperature is then used to slowly and gradually cool the mold 14, thereby ensuring uniform cooling, reducing energy consumption, and achieving energy reuse. At the same time, the temperature difference between the spheroidizing agent and the air is reduced, ensuring mold opening stability.

[0036] In this embodiment, a cooling coil (not shown) is provided in the filter box 20 , and cold water flows through the cooling coil to cool the hot air entering the filter box 20 , thereby controlling the cooling speed of the mold 14 .

[0037] In another embodiment, the first air duct 21 and the second air duct 22 are copper coils, which are used to improve the heat dissipation path and heat dissipation efficiency, thereby improving the heat dissipation of hot air entering the first air duct 21 and the second air duct 22, thereby achieving slow cooling of the mold 14.

[0038] The specific operation method of the present invention is as follows: step 1: place the mold 14 on the track 13 and push it into the recovery chamber 11 along the track 13, start the lifting device 15 so that the strong cooling shell 16 faces the mold 14, start the strong cooling fan in the strong cooling shell 16, and reduce the temperature of the mold 14.

[0039] Step 2: Close the recovery chamber 11 and open the mold 14. The first fan 25 in the first air duct 21 sucks the exhaust gas in the recovery chamber 11 into the filter box 20, and the second fan 26 in the second air duct 22 sucks the gas filtered by the filter box 20 back into the recovery chamber 11.

[0040] Since the magnesium component in the spheroidizing agent is extremely active, only by cooling it to an appropriate temperature before demolding can the violent reaction caused by the contact between magnesium and air be reduced. Therefore, the present invention uses the strong cooling shell 16 to force-cool the mold 14, reducing the temperature of the mold 14 before demolding. Then, the filter box 20 and the first fan 25 and the second fan 26 therein are used to circulate the air in the recovery chamber 11, thereby increasing the temperature in the recovery chamber 11. In turn, the temperature to which the spheroidizing agent in the mold 14 is exposed during demolding is increased, thereby reducing the temperature difference, preventing a large amount of magnesium loss, and ensuring production safety.

[0041] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A waste gas recovery and purification device for spheroidizing agent smelting and demoulding, comprising a mounting platform (10), a recovery chamber (11) being provided on the mounting platform (10), wherein a mold (14) is placed in the recovery chamber (11), and characterized in that: The top of the recovery chamber (11) is provided with a lifting device (15), and a forced cooling shell (16) is fixedly connected to the lifting rod of the lifting device (15). A forced cooling fan is provided in the forced cooling shell (16). The forced cooling fan is used to quickly suck the air outside the recovery chamber (11) into the recovery chamber (11). The mounting platform (10) is also provided with a filter box (20), and a filter cavity (23) is formed inside the filter box (20). A filter core (24) is provided in the filter cavity (23). A first air duct (21) and a second air duct (22) are respectively provided on both sides of the recovery chamber (11). One end of the first air duct (21) and the second air duct (22) pass through the recovery chamber (11) and are connected to the internal cavity of the recovery chamber (11). The other ends of the first air duct (21) and the second air duct (22) pass through the filter box (20) and are connected to the filter cavity (23). The openings of the first air duct (21) and the second air duct (22) on the filter box (20) are respectively located on both sides of the filter core (24). A first fan (25) and a second fan (26) are respectively provided in the first air duct (21) and the second air duct (22). The first air duct (21) and the second air duct (22) are arranged opposite to each other. The first fan (25) is arranged in the first air duct (21) to suck the exhaust gas in the recovery chamber (11) into the filter box (20). The second fan (26) is arranged in the second air duct (22) to suck the gas filtered by the filter box (20) back into the recovery chamber (11).

2. The waste gas recovery and purification device for spheroidizing agent smelting and demoulding according to claim 1 is characterized in that: The openings of the first air channel (21) and the second air channel (22) on the recovery chamber (11) are located between the top of the recovery chamber (11) and the top of the mold (14).

3. The waste gas recovery and purification device for spheroidizing agent smelting and demoulding according to claim 1 is characterized in that: The strong cooling shell (16) is a square shell-shaped structure with one side open. The strong cooling shell (16) is located between the top of the recovery chamber (11) and the top of the mold (14). The open surface of the strong cooling shell (16) faces the inner wall of the recovery chamber (11). Ventilation holes are provided on the wall of the strong cooling shell (16) away from the open surface.

4. The waste gas recovery and purification device for spheroidizing agent smelting and demoulding according to claim 1 is characterized in that: The recovery chamber (11) is a square shell-like structure with an open surface. A chamber door (12) is rotatably provided on the open surface of the recovery chamber (11). A track (13) is provided on the upper plane of the mounting platform (10). The track (13) extends from the outside of the recovery chamber (11) to the inside of the recovery chamber (11). The track (13) is located below the chamber door (12). The mold (14) is slidably provided on the track (13) and can slide along the extension direction of the track (13). The mold (14) is loaded with molten spheroidizing agent metal liquid.

5. The waste gas recovery and purification device for spheroidizing agent smelting and demoulding according to claim 1 is characterized in that: A telescopic cylinder (17) is provided on the top of the recovery chamber (11), and a telescopic rod of the telescopic cylinder (17) passes through the top of the recovery chamber (11) and extends into the internal cavity of the recovery chamber (11). The telescopic rod of the telescopic cylinder (17) faces the top of the mold (14). The end of the telescopic rod of the telescopic cylinder (17) is fixedly connected to a hook (18). A hanging ear (19) is provided on the top of the mold (14), and the hook (18) can be hooked onto the hanging ear (19).

6. The waste gas recovery and purification device for spheroidizing agent smelting and demoulding according to claim 1 is characterized in that: The filter element (24) is made of a polypropylene hot-sprayed fiber membrane.

7. The waste gas recovery and purification device for spheroidizing agent smelting and demoulding according to claim 1 is characterized in that: The lifting device (15) is a screw lift.

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