Oxygen-enriched reduction smelting furnace for producing lead-bismuth alloy

Abstract

This invention relates to the field of lead-bismuth alloy technology and discloses an oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys. The furnace includes a furnace body, a flue gas treatment furnace, and a flue gas recovery furnace. Multiple feed inlets are located above the furnace body, and multiple equally spaced oxygen lance pipe protective sleeves are located at the bottom of the furnace body. In this invention, the oxygen lance pipe protective sleeves effectively protect the oxygen lance pipes. The feed inlets, in conjunction with a linkage structure and upper and lower mounting shells and connecting pipes, allow the flue gas generated during smelting to preheat the feed material and oxygen, resulting in significant energy savings. The flue gas treatment furnace and flue gas recovery furnace are securely mounted via mounting bases. An internal filter plate intercepts lead-bismuth alloy residue, and a drive assembly drives an L-shaped scraper to remove the residue from the filter plate. Simultaneously, a linkage feeding structure ensures smooth residue collection and prevents blockage. A servo motor drives a turntable to switch flue gas channels, ensuring uniform preheating. The overall structure is optimized, improving smelting efficiency.

Description

Technical Field

[0001] This invention belongs to the field of lead-bismuth alloy technology, and more specifically, relates to an oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys. Background Technology

[0002] Lead-bismuth alloys are increasingly widely used in high-end fields such as nuclear power, aerospace, and electronic packaging due to their low melting point, high thermal conductivity, and excellent neutron absorption performance. The market's requirements for their production efficiency, product purity, and energy conservation and environmental protection are constantly increasing. As the core process for the large-scale production of lead-bismuth alloys, oxygen-enriched reduction smelting directly determines the quality of alloy products and the economic efficiency of production.

[0003] Oxygen-enriched reduction smelting produces a large amount of high-temperature flue gas (temperatures can reach 800-1200℃). Most existing equipment directly discharges the flue gas or discharges it after simple treatment, without effectively recovering and utilizing the heat energy in the flue gas, resulting in huge energy waste and increasing the energy consumption and cost of subsequent flue gas treatment.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To address the issue that oxygen-enriched reduction smelting generates large amounts of high-temperature flue gas, most existing equipment directly discharges the flue gas or performs simple treatment before discharge, failing to effectively recover and utilize the heat energy in the flue gas, resulting in significant energy waste and increasing the energy consumption and cost of subsequent flue gas treatment. The basic concept of the technical solution adopted in this invention is as follows:

[0006] An oxygen-enriched reduction smelting furnace for producing lead-bismuth alloy includes a furnace body, a flue gas treatment furnace, and a flue gas recovery furnace. Multiple feed inlets are located above the furnace body, and multiple equally spaced oxygen lance pipe protective sleeves are located at the bottom of the furnace body. Support legs are provided around the bottom of the furnace body. An upper mounting shell and a lower mounting shell are respectively provided above and below the furnace body, penetrating the oxygen lance pipe protective sleeves and the feed inlets. Upper and lower connecting pipes are respectively provided on both sides of the upper and lower mounting shells, with their ends respectively located within the flue gas treatment furnace and the flue gas recovery furnace. Mounting seats are provided at the bottom of both the flue gas treatment furnace and the flue gas recovery furnace. The flue gas treatment furnace contains a drive assembly, an L-shaped scraper, and a filter plate. The drive assembly drives the L-shaped scraper to scrape away lead-bismuth alloy residue generated on the filter plate.

[0007] In a preferred embodiment of the present invention, a flue is provided above the smelting furnace body, and the other end of the flue is provided on the flue gas treatment furnace. A plurality of connecting rods are also movably passing through the smelting furnace body, and a tilting plate is provided at one end of each connecting rod, and the tilting plates are respectively rotatably arranged on the inner wall of the feed inlet.

[0008] In a preferred embodiment of the present invention, each of the connecting rods has a connecting rod on one of its opposite sidewalls at the other end, and a connecting plate is provided at the bottom of the connecting rod of the flue gas treatment furnace. A movable rod is provided on one sidewall of the connecting plate, the movable rod movably passes through the upper connecting pipe, and a sealing plate is provided at its port, the sealing plate movably passing through the upper connecting pipe.

[0009] In a preferred embodiment of the present invention, the flue gas treatment furnace is provided with a left flow chamber, a V-shaped flow chamber, an upper flow chamber, and a horizontal flow chamber. The V-shaped flow chamber is provided with an installation slot and a discharge slot. The flue gas treatment furnace is also provided with a receiving chamber, and the receiving chamber and the discharge slot are connected.

[0010] In a preferred embodiment of the present invention, the driving component includes a servo motor, which is disposed on the side wall of the flue gas treatment furnace. A rotating rod is provided at the output end of the servo motor. The rotating rod movably passes through the flue gas treatment furnace and the left flow cavity, the V-shaped flow cavity and the upper flow cavity, and a turntable is provided at its port.

[0011] In a preferred embodiment of the present invention, a rectangular slot is provided on the turntable, and the rectangular slot is connected to the upper connecting pipe and the lower connecting pipe respectively.

[0012] In a preferred embodiment of the present invention, the rotating rod is provided with a cam at the upper flow cavity, and an L-shaped scraper is provided below the cam. The L-shaped scraper is vertically slidably disposed on the inner wall of the upper flow cavity, and an inclined surface is provided at the bottom of the L-shaped scraper.

[0013] In a preferred embodiment of the present invention, a sliding plate is provided in the inner cavity of the mounting slot for sealing and sliding. Two return springs are provided at the bottom of the sliding plate. The two return springs are symmetrical to each other, and their other ends are respectively provided at the bottom of the inner cavity of the mounting slot.

[0014] In a preferred embodiment of the present invention, the bottom of the sliding plate is further provided with an irregularly shaped moving plate, which slides vertically in the mounting groove. A feeding plate is attached to the upper end of the irregularly shaped moving plate, and the sliding plate and the L-shaped scraper are adapted to each other.

[0015] In a preferred embodiment of the present invention, the feeding plate is provided with a rotating shaft, and the rotating shaft is rotatably disposed on the inner wall of the feeding groove.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] This invention features an oxygen lance pipeline protective sleeve that effectively protects the oxygen lance pipeline. The feed inlet, along with a linkage structure and upper and lower mounting shells connected to upper and lower connecting pipes, allows the flue gas generated during smelting to preheat the feed material and oxygen, resulting in significant energy savings. The flue gas treatment furnace and flue gas recovery furnace are securely mounted via mounting bases. Internal filter plates intercept lead-bismuth alloy residue, and a drive assembly drives an L-shaped scraper to remove the residue from the filter plates. Simultaneously, a linkage feeding structure ensures smooth residue collection and prevents blockage. A servo motor drives a turntable to switch flue gas channels, ensuring uniform preheating. The overall structure is optimized, improving smelting efficiency.

[0018] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0019] In the attached diagram:

[0020] Figure 1 A three-dimensional (I) structural schematic diagram of an oxygen-enriched reduction melting furnace for producing lead-bismuth alloys;

[0021] Figure 2 A three-dimensional (II) structural schematic diagram of an oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys;

[0022] Figure 3 A bottom view schematic diagram of an oxygen-enriched reduction melting furnace for producing lead-bismuth alloys.

[0023] Figure 4 A cross-sectional schematic diagram of the flue gas treatment furnace for an oxygen-enriched reduction smelting furnace used in the production of lead-bismuth alloys.

[0024] Figure 5 This is a cross-sectional view of the feed inlet of an oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys.

[0025] Figure 6 A partial structural diagram of the tilting plate of an oxygen-enriched reduction melting furnace for producing lead-bismuth alloys.

[0026] Figure 7 This is an enlarged schematic diagram of the flue gas treatment furnace body of an oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys.

[0027] Figure 8 A cross-sectional view (I) of the internal structure of the flue gas treatment furnace of an oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys.

[0028] Figure 9 (II) Schematic diagram of the internal structure of the flue gas treatment furnace of an oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys.

[0029] Figure 10This is a partially enlarged schematic diagram of the internal cavity of the flue gas treatment furnace in an oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys.

[0030] Figure 11 An oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys Figure 10 Enlarged structural diagram at point A in the middle;

[0031] Figure 12 This is a front view structural diagram of the flue gas treatment furnace of an oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys.

[0032] Figure 13 An oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys Figure 12 Enlarged structural diagram at point B.

[0033] In the picture:

[0034] 1. Smelting furnace body; 11. Support leg; 111. Mounting base; 12. Feed inlet; 13. Flue gas treatment furnace; 14. Flue gas recovery furnace; 15. Upper mounting shell; 16. Flue; 17. Lower mounting shell; 18. Lower connecting pipe; 181. Upper connecting pipe; 19. Oxygen lance pipe protective sleeve;

[0035] 2. Flip-over plate; 21. Connecting rod; 211. Connecting rod; 22. Connecting plate; 221. Moving rod; 222. Sealing plate;

[0036] 31. Left flow chamber; 311. V-shaped flow chamber; 312. Upper flow chamber; 313. Horizontal flow chamber; 314. Receiving chamber;

[0037] 4. Servo motor; 41. Rotary rod; 411. Turntable; 412. Rectangular slot; 42. Filter plate; 43. Cam; 431. L-shaped scraper; 432. Inclined surface;

[0038] 5. Installation slot; 51. Sliding plate; 512. Return spring; 513. Irregularly shaped moving plate; 516. Feeding plate; 517. Rotating shaft; 52. Feeding slot. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0040] Example 1:

[0041] like Figures 1 to 13As shown, an oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys includes a furnace body 1, a flue gas treatment furnace 13, and a flue gas recovery furnace 14. Multiple feed inlets 12 are provided above the furnace body 1, and multiple equally spaced oxygen lance pipe protective sleeves 19 are provided at the bottom of the furnace body 1. Support legs 11 are provided around the bottom of the furnace body 1. An upper mounting shell 15 and a lower mounting shell 17 are respectively provided above and below the furnace body 1, and the upper mounting shell 15 and the lower mounting shell 17 penetrate through the oxygen lance pipe protective sleeves 19 and the feed inlets 12, respectively. The upper mounting housing 15 and the lower mounting housing 17 are respectively provided with upper connecting pipes 181 and lower connecting pipes 18 on both sides, and the two ends of the upper connecting pipes 181 and lower connecting pipes 18 are respectively located in the flue gas treatment furnace 13 and the flue gas recovery furnace 14. Mounting seats 111 are provided at the bottom of both the flue gas treatment furnace 13 and the flue gas recovery furnace 14. The inner cavity of the flue gas treatment furnace 13 is provided with a drive assembly, an L-shaped scraper 431, and a filter plate 42. The drive assembly is used to drive the L-shaped scraper 431 to scrape off the lead-bismuth alloy residue generated on the placed filter plate 42. The oxygen lance pipe protective sleeve 19 effectively protects the oxygen lance pipe. The feed inlet 12, in conjunction with the linkage structure and the upper mounting housing 15, lower mounting housing 17, upper connecting pipe 181, and lower connecting pipe 18, allows the flue gas generated during smelting to preheat the feed and oxygen, resulting in significant energy savings. The flue gas treatment furnace 13 and the flue gas recovery furnace 14 are securely installed by the mounting base 111. The internal filter plate 42 intercepts lead-bismuth alloy residue. The drive component drives the L-shaped scraper 431 to scrape off the residue on the filter plate 42. At the same time, the linkage feeding structure allows the residue to be collected smoothly and avoids blockage. The servo motor 4 drives the turntable 411 to switch the flue gas channel to ensure uniform preheating. The overall structure is optimized to improve smelting efficiency.

[0042] like Figures 1 to 6 As shown in the specific embodiment, a flue 16 is also provided above the smelting furnace body 1, and the other end of the flue 16 is provided on the flue gas treatment furnace 13. Multiple connecting rods 21 are also movably connected through the smelting furnace body 1. Each connecting rod 21 is provided with a tilting plate 2 at one end, and the tilting plates 2 are respectively rotatably set on the inner wall of the feed inlet 12. In this configuration, the tilting plate 2 and the inner wall of the feed inlet 12 rotate to form an adaptive sealing structure. The weight of the lead-bismuth alloy material can drive the tilting plate 2 to tilt around the hinge point to open the feed channel. After the material passes through, the tilting plate 2 can automatically reset and close under the action of gravity, effectively preventing the high-temperature flue gas in the smelting furnace body 1 from leaking out of the feed inlet 12. At the same time, the connecting rod 21 converts the tilting action of the tilting plate 2 into a horizontal linear displacement, providing mechanical linkage power for the subsequent flue gas channel opening and closing control.

[0043] like Figures 1 to 6As shown, furthermore, each connecting rod 21 has a connecting rod 211 on one side wall opposite to each other at the other end, and a connecting plate 22 is provided at the bottom of the connecting rod 21 in the flue gas treatment furnace 13. A moving rod 221 is provided on one side wall of the connecting plate 22. The moving rod 221 moves through the upper connecting pipe 181, and a sealing plate 222 is provided at its end. The sealing plate 222 moves through the upper connecting pipe 181. In this configuration, the connecting rod 211 realizes the synchronous linkage of multiple sets of connecting rods 21, ensuring the consistency of the movement of the flipping plate 2 at all feed inlets 12. The connecting plate 22 and the moving rod 221 transmit the horizontal displacement to the sealing plate 222. The sealing plate 222 slides and seals with the inner wall of the upper connecting pipe 181. Through the material triggering action of the flipping plate 2, the opening and closing of the upper connecting pipe 181 is automatically controlled, realizing the linkage opening and closing of the flue gas preheating channel and the feeding action without additional drive energy consumption.

[0044] Example 2:

[0045] The difference between the above embodiments and this embodiment is that: Figures 1 to 5 and Figures 7 to 13 As shown, an oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys has a flue gas treatment furnace 13 with a left flow chamber 31, a V-shaped flow chamber 311, an upper flow chamber 312, and a horizontal flow chamber 313. The V-shaped flow chamber 311 has an installation slot 5 and a discharge slot 52. A receiving chamber 314 is also provided within the flue gas treatment furnace 13, and the receiving chamber 314 is connected to the discharge slot 52. In this configuration, the left flow chamber 31, V-shaped flow chamber 311, upper flow chamber 312, and horizontal flow chamber 313 constitute a multi-stage flue gas guiding path. The inclined structure of the V-shaped flow chamber 311 guides solid residue to converge towards the discharge slot 52. The installation slot 5 provides a sealed installation space for the residue unloading actuator. The receiving chamber 314 and the discharge slot 52 are connected to form a closed-loop receiving channel, achieving an integrated layout for flue gas purification and residue collection.

[0046] like Figures 1 to 5 and Figures 7 to 13 As shown, in a specific embodiment, the drive component includes a servo motor 4, which is mounted on the side wall of the flue gas treatment furnace 13. A rotating rod 41 is mounted at the output end of the servo motor 4, and the rotating rod 41 movably passes through the flue gas treatment furnace 13, the left flow chamber 31, the V-shaped flow chamber 311, and the upper flow chamber 312. A turntable 411 is mounted at its port. In this configuration, the servo motor 4 serves as a single power source, achieving long-distance power transmission through the rotating rod 41 passing through multiple flow chambers. The rotating rod 41 synchronously drives the turntable 411 and the cam 43 to rotate, allowing the flue gas channel switching and filter plate residue scraping actions to share a common drive source, simplifying the equipment transmission structure and improving the synchronization of actions and operational reliability.

[0047] like Figures 1 to 5 and Figures 7 to 13As shown, a rectangular slot 412 is further provided on the turntable 411, which is connected to the upper connecting pipe 181 and the lower connecting pipe 18 respectively. In this configuration, the rectangular slot 412 rotates with the turntable 411, and alternately connects to the upper connecting pipe 181 and the lower connecting pipe 18 in sequence, so as to realize the time-sharing and segmented introduction of high-temperature flue gas into the upper mounting shell 15 and the lower mounting shell 17, so as to evenly preheat the feed inlet 12 and the oxygen lance pipe protective sleeve 19 respectively, avoiding the problem of local overheating caused by excessive flue gas flow in a single channel.

[0048] like Figures 1 to 5 and Figures 7 to 13 As shown, further, a cam 43 is provided on the rotating rod 41 at the upper flow cavity 312, and an L-shaped scraper 431 is provided below the cam 43. The L-shaped scraper 431 is vertically slidably disposed on the inner wall of the upper flow cavity 312, and an inclined surface 432 is provided at the bottom of the L-shaped scraper 431. In this configuration, the cam 43 rotates with the rotating rod 41 to perform intermittent squeezing motion, driving the L-shaped scraper 431 to slide vertically back and forth along the inner wall of the upper flow cavity 312. The inclined surface 432 at the bottom of the L-shaped scraper 431 can adhere to the upper surface of the filter plate 42 to scrape off the lead-bismuth alloy residue, while guiding the residue to slide down into the V-shaped flow cavity 311, avoiding the accumulation of residue at the bottom of the scraping mechanism.

[0049] Example 13:

[0050] The difference between the above embodiments and this embodiment is that: Figures 1 to 5 and Figures 7 to 13 As shown, an oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys has a sliding plate 51 slidably installed inside the mounting slot 5. Two return springs 512 are symmetrically positioned at the bottom of the sliding plate 51, with their other ends respectively located at the bottom of the mounting slot 5. In this configuration, the sliding plate 51 and the mounting slot 5 slide in a sealed manner, achieving a dynamic seal between the upper flow cavity 312 and the mounting slot 5. The two symmetrical return springs 512 provide elastic return force to the sliding plate 51. When the L-shaped scraper 431 removes its downward pressure, the sliding plate 51 can quickly return to its original position, sealing the mounting slot and preventing flue gas leakage from the mounting slot 5, thus ensuring the airtightness of the flue gas flow cavity.

[0051] like Figures 1 to 5 and Figures 7 to 13As shown, in a specific embodiment, a shaped movable plate 513 is also provided at the bottom of the sliding plate 51. The shaped movable plate 513 slides vertically in the mounting slot 5, and a feeding plate 516 is attached to the upper end of the shaped movable plate 513. The sliding plate 51 and the L-shaped scraper 431 are adapted to each other. In this configuration, the shaped movable plate 513 slides vertically synchronously with the sliding plate 51, forming a bottom support limit for the feeding plate 516 under normal conditions. When the L-shaped scraper 431 presses down on the sliding plate 51, the shaped movable plate 513 moves down synchronously to release the support. The shape of the sliding plate 51 is adapted to the L-shaped scraper 431, ensuring accurate triggering of scraping and unloading actions without interference.

[0052] like Figures 1 to 5 and Figures 7 to 13 As shown, a rotating shaft 517 is further provided on the feeding plate 516, and the rotating shaft 517 is rotatably mounted on the inner wall of the feeding slot 52. In this configuration, the feeding plate 516 is hinged to the inner wall of the feeding slot 52 via the rotating shaft 517 to form a gravity-driven overturning unloading structure. After the support of the irregularly shaped moving plate 513 is released, the feeding plate 516 flips downward around the rotating shaft 517 under the weight of the residue to open the feeding channel. The residue falls into the receiving chamber 314 along the inclined surface of the V-shaped flow cavity 311 through the feeding slot 52. After unloading, the feeding plate 516 automatically resets and closes to prevent flue gas from entering the receiving chamber 314.

[0053] The implementation principle of the oxygen-enriched reduction smelting furnace for producing lead-bismuth alloy according to the present invention is as follows:

[0054] First, the workers transfer the lead-bismuth alloy from the transmission system to the feed inlet 12 on the furnace body 1. Then, by placing the corresponding oxygen lance on the furnace body 1, the oxygen lance pipe protective sleeve 19 can cover the oxygen lance pipe. At the same time, the workers control the operation of the oxygen lance and the heating system inside the furnace body 1 through the controller to carry out the smelting work (the specific transmission system, heating system, and oxygen lance placement are all existing technologies).

[0055] When the lead-bismuth alloy enters the feed inlet 12, it can press the flip plate 2, causing the flip plate 2 to flip. When the flip plate 2 flips, it can push the connecting rod 21 to move horizontally. When the connecting rod 21 moves horizontally, it can drive the connecting rod 211 and the connecting plate 22 to move. When the connecting plate 22 moves, it can drive the moving rod 221 to move, thus driving the remaining sealing plates 222 to move, so that the sealing plates 222 can no longer block the upper connecting pipe 181.

[0056] When the furnace body 1 melts the lead-bismuth alloy being transported, it will generate flue gas. Therefore, the flue gas can be transported from the flue 16 to the flue gas treatment furnace 13. After passing through the flue gas treatment furnace 13, it enters the upper connecting pipe 181 and the lower connecting pipe 18 respectively, and then enters the upper mounting shell 15 and the lower mounting shell 17 respectively. Therefore, the feed inlet 12 and the oxygen lance pipe protective sleeve 19 can be preheated, so that the lead-bismuth alloy and oxygen passing through can be preheated.

[0057] When the flue gas enters the flue gas treatment furnace 13, it will enter the V-shaped flow chamber 311 through the left flow chamber 31, then enter the upper flow chamber 312, pass through the filter plate 42, and enter the horizontal flow chamber 313. Then, it can enter the upper connecting pipe 181 and the lower connecting pipe 18 in sequence through the rectangular slot 412 opened on the turntable 411.

[0058] At the same time, the staff controls the operation of the servo motor 4, so the servo motor 4 can drive the rotating rod 41 to rotate. When the rotating rod 41 rotates, it can drive the turntable 411 to rotate, so that the rectangular slots 412 on the turntable 411 can be aligned with the upper connecting pipe 181 and the lower connecting pipe 18 in sequence, thereby ensuring that the flue gas can enter the upper connecting pipe 181 and the lower connecting pipe 18 in sequence.

[0059] Simultaneously, when the rotating rod 41 rotates, it can also drive the cam 43 to rotate. When the cam 43 rotates, it can drive the L-shaped scraper 431 to move vertically in the upper flow cavity 312 (because the L-shaped scraper 431 and the upper flow cavity 312 are slidably set). When the L-shaped scraper 431 is squeezed and moves vertically downward for a certain distance, it can contact the sliding plate 51, thereby pressing the sliding plate 51 to move downward. The L-shaped scraper 431 can also scrape off the lead-bismuth alloy residue intercepted by the flue gas flow on the surface of the filter plate 42. When the sliding plate 51 moves downward, it can drive the irregularly shaped moving plate 513 to move downward, so that the irregularly shaped moving plate 513 can leave the bottom of the feeding plate 516. At this time, the feeding plate 516 can rotate around the rotating shaft 517 under the action of gravity, so that the lead-bismuth alloy residue can enter the feeding slot 52 along the inclined surface of the V-shaped flow cavity 311, and finally enter the receiving cavity.

[0060] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys, characterized in that: The furnace includes a smelting furnace body (1), a flue gas treatment furnace (13), and a flue gas recovery furnace (14). The smelting furnace body (1) has multiple feed inlets (12) on its upper part. The smelting furnace body (1) also has multiple oxygen lance pipe protective sleeves (19) arranged at equal intervals on its bottom. The smelting furnace body (1) has support legs (11) around its bottom. The smelting furnace body (1) has an upper mounting shell (15) and a lower mounting shell (17) on its upper and lower parts, respectively. The upper mounting shell (15) and the lower mounting shell (17) penetrate the oxygen lance pipe protective sleeves (19) and the feed inlets (12), respectively. The upper mounting shell (15) and the lower mounting shell (17) are respectively provided with an upper connecting pipe (181) and a lower connecting pipe (18) on both sides, and the two ends of the upper connecting pipe (181) and the lower connecting pipe (18) are respectively located in the flue gas treatment furnace (13) and the flue gas recovery furnace (14). The bottom of the flue gas treatment furnace (13) and the flue gas recovery furnace (14) are both provided with mounting bases (111). The flue gas treatment furnace (13) is equipped with a drive assembly, an L-shaped scraper (431), and a filter plate (42). The drive assembly is used to drive the L-shaped scraper (431) to scrape off the lead-bismuth alloy residue generated on the placed filter plate (42).

2. The oxygen-enriched reduction smelting furnace for producing lead-bismuth alloy according to claim 1, characterized in that, A flue (16) is also provided above the smelting furnace body (1). The other end of the flue (16) is provided on the flue gas treatment furnace (13). A number of connecting rods (21) are also movably passing through the smelting furnace body (1). Each connecting rod (21) has a flip plate (2) at one end, and the flip plates (2) are respectively rotated and set on the inner wall of the feed inlet (12).

3. The oxygen-enriched reduction smelting furnace for producing lead-bismuth alloy according to claim 2, characterized in that, Each of the connecting rods (21) has a connecting rod (211) on one side wall opposite to each other at the other end, and a connecting plate (22) is provided at the bottom of the connecting rod (21) of the flue gas treatment furnace (13). A moving rod (221) is provided on one side wall of the connecting plate (22). The moving rod (221) moves through the upper connecting pipe (181) and a sealing plate (222) is provided at the end. The sealing plate (222) moves through the upper connecting pipe (181).

4. The oxygen-enriched reduction smelting furnace for producing lead-bismuth alloy according to claim 1, characterized in that, The flue gas treatment furnace (13) is provided with a left flow chamber (31), a V-shaped flow chamber (311), an upper flow chamber (312), and a horizontal flow chamber (313). The V-shaped flow chamber (311) is provided with an installation slot (5) and a discharge slot (52). The flue gas treatment furnace (13) is also provided with a receiving chamber (314). The receiving chamber (314) and the discharge slot (52) are connected.

5. The oxygen-enriched reduction smelting furnace for producing lead-bismuth alloy according to claim 1, characterized in that, The drive assembly includes a servo motor (4), which is installed on the side wall of the flue gas treatment furnace (13). The output end of the servo motor (4) is provided with a rotating rod (41), which moves through the flue gas treatment furnace (13) and the left flow chamber (31), the V-shaped flow chamber (311) and the upper flow chamber (312), and the port is provided with a turntable (411).

6. An oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys according to claim 5, characterized in that, The turntable (411) has a rectangular slot (412) that is connected to the upper connecting pipe (181) and the lower connecting pipe (18).

7. An oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys according to claim 5, characterized in that, The rotating rod (41) is provided with a cam (43) at the upper flow cavity (312), and an L-shaped scraper (431) is provided below the cam (43). The L-shaped scraper (431) is vertically slidably disposed on the inner wall of the upper flow cavity (312), and an inclined surface (432) is provided at the bottom of the L-shaped scraper (431).

8. An oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys according to claim 4, characterized in that, The inner cavity of the mounting slot (5) is sealed and slidably provided with a sliding plate (51). The bottom of the sliding plate (51) is provided with two reset springs (512). The two reset springs (512) are symmetrical to each other, and their other ends are respectively provided at the bottom of the inner cavity of the mounting slot (5).

9. An oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys according to claim 8, characterized in that, The bottom of the sliding plate (51) is also provided with an irregularly shaped moving plate (513), which slides vertically in the mounting slot (5). The upper end of the irregularly shaped moving plate (513) is fitted with a feeding plate (516), and the sliding plate (51) and the L-shaped scraper (431) are mutually compatible.

10. An oxygen-enriched reduction smelting furnace for producing lead-bismuth alloys according to claim 9, characterized in that, The feeding plate (516) is provided with a rotating shaft (517), and the rotating shaft (517) is rotatably disposed on the inner wall of the feeding groove (52).

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