A lead-zinc ore smelting apparatus

Abstract

The application provides a lead-zinc ore smelting device, and relates to the technical field of lead-zinc ore smelting. The lead-zinc ore smelting device comprises a placing table, a supporting seat is installed on the upper surface of the placing table; a smelting pot is rotationally connected to the inside of the base, a feeding pipe and a first smoke exhaust pipe are installed on the outer surface of the smelting pot, a second smoke exhaust pipe and a slag discharge pipe are installed on one end of the smelting pot, the second smoke exhaust pipe and the slag discharge pipe are symmetrically distributed, and zinc concentrate enters the smelting pot through the feeding pipe to perform an oxidation reaction. The supporting seat is arranged to install the rotationally connected smelting pot, a first oxygen feeding pipe is arranged in the inside of the smelting pot, a first feeding mechanism is arranged in the inside of the first oxygen feeding pipe, the zinc concentrate can be subjected to oxygen bottom blowing to be oxidized into a molten state melt, and after the oxidation is completed, the smelting pot is rotated by 90 degrees to make the first oxygen feeding pipe become side blowing and the reducing agent is added into the smelting pot together with oxygen.

Description

Technical Field

[0001] This invention relates to the field of lead-zinc ore smelting technology, specifically to a lead-zinc ore smelting equipment. Background Technology

[0002] Zinc is one of the ten major non-ferrous metals and is widely used in all aspects of the national economy. Existing zinc smelting processes involve melting zinc concentrate in an oxygen-blown bottom-blown furnace, then casting it into briquettes for reduction in a blast furnace. The zinc vapor is then condensed using traditional lead rain or zinc rain condensation to obtain crude zinc. This method eliminates the sintering machine and related problems associated with the blast furnace process. However, traditional pyrometallurgical zinc smelting requires first oxidizing and roasting the zinc concentrate, then adding pulverized coal to the roasted ore, kneading and pressing it into briquettes, preheating the briquettes in a coking furnace, and finally adding the hot briquettes and preheated coke (>800°C) from a coke preheating furnace to a distillation furnace to produce crude zinc. This process is lengthy, energy-intensive, and the briquetting and coking operations are conducted in harsh environments; this process has been completely phased out abroad. If lead-zinc concentrate is smelted using the Imperial Smelting Process (ISP), it presents significant environmental problems due to the need for a fuming furnace, sintering, and crushing of the concentrate, resulting in high energy consumption. During the sintering process, the dust return rate is as high as 75-85%, and a large amount of returned dust requires multiple crushing operations, making dust control difficult. In addition, the sintering flue gas volume is large, the SO2 concentration is low, generally not exceeding 5%, the residual sulfur in the sintered blocks is high, and the sulfur recovery rate is low. Low-altitude pollution from SO2 and lead dust generated during sintering operations has always been a persistent problem for this process.

[0003] A zinc concentrate smelting process is disclosed in Chinese Patent No. CN101914690B, which includes the following steps: adding zinc concentrate and flux into an oxygen bottom-blown smelting furnace and injecting oxygen into the furnace from the oxygen inlet at the bottom to smelt the zinc concentrate; allowing the molten material to flow by gravity into a side-blown reduction furnace and injecting oxygen and reducing agent into the furnace from the oxygen and reducing agent inlets on the side to reduce it; discharging the slag generated in the side-blown reduction furnace and transporting the zinc-containing flue gas generated in the side-blown reduction furnace to a liquid metal condenser for condensation to obtain crude zinc.

[0004] However, this oxygen-blown double-sided smelting pool technology for the oxidation and reduction production of metallic zinc has some drawbacks. When oxygen is introduced in a double-blown manner, two heating furnaces (smelting furnace and reduction furnace) are required to process the raw materials. The material preparation process is complicated and energy consumption is high. Heat loss will occur during the transfer of raw materials, and the safety during the material transfer process is not good enough. Summary of the Invention

[0005] The purpose of this invention is to provide a lead-zinc ore smelting equipment that addresses the problems of energy consumption and safety issues in existing lead-zinc ore smelting equipment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: the lead-zinc ore smelting equipment includes a placement platform, and a support base is installed on the upper surface of the placement platform;

[0007] A smelting tank is rotatably connected to the interior of a base. A feeding pipe and a first exhaust pipe are installed on the outer surface of the smelting tank. A second exhaust pipe and a slag discharge pipe are installed at one end of the smelting tank, symmetrically distributed. Zinc concentrate enters the smelting tank through the feeding pipe for oxidation, and the fumes generated during oxidation are discharged through the first exhaust pipe. The smelting tank is rotated to perform a reduction reaction on the zinc concentrate, and the fumes generated during the reduction reaction are discharged through the second exhaust pipe.

[0008] The first oxygen supply pipe has most of its length inside the smelting tank and the other part of its length outside the smelting tank.

[0009] The first feeding mechanism is located inside the portion of the first oxygen supply pipe located outside the smelting tank. The first feeding mechanism adds a reducing agent to the inside of the smelting tank during the reduction reaction of zinc concentrate.

[0010] A further technical solution of the present invention is that a second feeding mechanism for adding reducing agent is fixedly connected to the upper surface of the placement platform. The second feeding mechanism includes a fixing block fixedly connected to the upper surface of the placement platform. A connecting ring is fixedly connected to the upper surface of the fixing block. The connecting ring is sleeved on the outer surface of the smelting tank. A second fixing pipe and an inlet pipe that communicate with each other are fixedly connected to the outer surface of the connecting ring.

[0011] A further technical solution of the present invention is that a second connecting cylinder is installed on the top of the second fixed tube by a reset spring, and a guide nozzle is fixedly connected to the bottom of the second connecting cylinder. The guide nozzle has a second through groove for discharging the reducing agent inside the second connecting cylinder.

[0012] A further technical solution of the present invention is that a feed hole is provided on the outer surface of the smelting tank, and the guide nozzle introduces the reducing agent into the interior of the smelting tank through the feed hole.

[0013] A further technical solution of the present invention is that the first oxygenation pipe includes an air inlet pipe fixedly connected to the inside of the smelting tank, a connecting pipe fixedly connected to one end of the air inlet pipe, two sets of exhaust pipes fixedly connected to the outer surface of the connecting pipe, and a first fixing pipe for installing the first feeding mechanism fixedly connected to the outer surface of the air inlet pipe.

[0014] A further technical solution of the present invention is that a plurality of second oxygen supply pipes are installed on the outer surface of the smelting tank. The second oxygen supply pipe includes an upper pipe fixedly connected to the inside of the smelting tank, and a first universal joint, a middle pipe, a second universal joint and a bottom pipe are installed sequentially at the bottom of the upper pipe.

[0015] A further technical solution of the present invention is that the smelting tank is internally connected to two rotating shafts, and one end of each of the two rotating shafts is fixedly connected to a second drive motor for driving them. The middle tubes of two adjacent second oxygenation pipes are respectively fixedly connected to one of the rotating shafts through a connecting rod.

[0016] A further technical solution of the present invention is that a guide rod for moving the central tube is rotatably connected inside the smelting tank, and a third drive motor for driving the guide rod is fixedly connected to one end of the guide rod. The guide rod is serpentine.

[0017] A further technical solution of the present invention is that the first feeding mechanism includes a hydraulic telescopic rod fixedly connected to the outer surface of the air inlet pipe, a connecting plate fixedly connected to the movable end of the hydraulic telescopic rod, a connecting rod fixedly connected to the bottom end of the connecting plate away from the hydraulic telescopic rod, a first connecting cylinder fixedly connected to the bottom of the connecting rod, the first connecting cylinder being slidably connected to the inside of the first fixed pipe, a feeding hole for adding reducing agent being opened at the top of the first connecting cylinder, and four first through grooves for introducing reducing agent into the first oxygen supply pipe being opened on the outer surface of the first connecting cylinder.

[0018] A further technical solution of the present invention is that a driving mechanism is installed at the bottom of the placement platform and at one end of the smelting tank. The driving mechanism includes a first driving motor fixedly connected to the bottom of the placement platform, a first sprocket fixedly connected to the output end of the first driving motor, a second sprocket driven by the first sprocket through a chain, and the second sprocket fixedly connected to one end of the smelting tank.

[0019] The beneficial effects of this invention are:

[0020] By installing a support base on the upper surface of the placement platform to install the smelting tank with a rotating connection, and by installing a first oxygen supply pipe inside the smelting tank and a first feeding mechanism inside the first oxygen supply pipe, it is possible for users to conveniently perform bottom blowing of oxygen on zinc concentrate to oxidize it into a molten state. Moreover, after oxidation, the smelting tank can be rotated 90 degrees to make the first oxygen supply pipe switch to side blowing and add the reducing agent along with the oxygen. This not only avoids heat loss caused by raw material transfer during the reduction of zinc concentrate and reduces safety issues caused by raw material transfer, but also makes it convenient for users to add the reducing agent and avoids workers being burned by the high-temperature furnace during manual feeding. Attached Figure Description

[0021] Figure 1 This is an exploded view of the present invention.

[0022] Figure 2 This is a structural schematic diagram from the first perspective of the present invention.

[0023] Figure 3 This is a structural schematic diagram from a second perspective of the present invention.

[0024] Figure 4 This is a cross-sectional view of the first feeding mechanism in a specific embodiment of the present invention.

[0025] Figure 5 This is a cross-sectional view of the feeding state of the first feeding mechanism in a specific embodiment of the present invention.

[0026] Figure 6 This is a schematic diagram of the second embodiment of the feeding mechanism of the present invention.

[0027] Figure 7 This is a cross-sectional view of the second feeding mechanism in a specific embodiment of the present invention.

[0028] Figure 8 This is the present invention. Figure 7 A magnified schematic diagram of the structure at point A in the middle.

[0029] Figure 9 This is a schematic diagram of the second embodiment of the oxygen supply tube of the present invention.

[0030] Figure 10 This is a schematic diagram of the structure of the second oxygen supply tube in a specific embodiment of the present invention.

[0031] Figure 11 This is a schematic diagram of the third embodiment of the oxygen supply tube of the present invention.

[0032] In the diagram: 1-Placement platform, 11-Support base, 111-Support block, 112-Mounting base, 113-Roller, 114-Limiting groove, 2-Smelting tank, 21-Feeding pipe, 22-First exhaust pipe, 23-First oxygen supply pipe, 231-Inlet pipe, 232-Connecting pipe, 233-Exhaust pipe, 234-First fixing pipe, 24-First feeding mechanism, 241-Hydraulic telescopic rod, 242-Connecting plate, 243-Connecting rod, 244-First connecting cylinder, 245-Feeding hole, 246-First through slot, 25-Second exhaust pipe, 26-Slag discharge pipe, 27-Second feeding mechanism, 271-Connecting... 272-Fixing block, 273-Reset spring, 274-Second connecting cylinder, 275-Guide nozzle, 276-Second through groove, 277-Inlet pipe, 278-Feed hole, 279-Second fixed pipe, 28-Second oxygenation pipe, 281-Upper pipe, 282-First universal joint, 283-Middle pipe, 284-Second universal joint, 285-Bottom pipe, 286-Rotating shaft, 2861-Connecting rod, 287-Second drive motor, 288-Guide rod, 289-Third drive motor, 3-Drive mechanism, 31-First drive motor, 32-First sprocket, 33-Second sprocket, 34-Chain. Detailed Implementation

[0033] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0034] like Figure 1-2 As shown, a lead-zinc ore smelting equipment includes a placement platform 1, and four support seats 11 are installed on the upper surface of the placement platform 1. The four support seats 11 are located at the four corners of the upper surface of the placement platform 1. The smelting tank 2 is supported by the four support seats 11, so that the smelting tank 2 can rotate relative to the placement platform 1. In other embodiments, the number of support seats 11 can be two, six or even more.

[0035] The top of the outer surface of the smelting tank 2 is fixedly connected to a feeding pipe 21 and a first exhaust pipe 22, so that zinc concentrate can be added into the interior of the smelting tank 2 through the feeding pipe 21. When the heat source (not shown in the figure) heats the material inside the smelting tank 2, the generated flue gas is discharged from the first exhaust pipe 22.

[0036] The interior of the smelting tank 2 is equipped with a first oxygenation pipe 23. The inlet end of the first oxygenation pipe 23 penetrates the side wall of the smelting tank 2 and is fixedly connected to its outer surface. The inlet direction of the first oxygenation pipe 23 is perpendicular to the axial direction of the smelting tank 2. The two exhaust ends of the first oxygenation pipe 23 are located at the top and bottom of the interior of the smelting tank 2, respectively. The inlet end of the first oxygenation pipe 23 is equipped with a first feeding mechanism 24. A second exhaust pipe 25 and a slag discharge pipe 26 are fixedly connected to the edge of one end of the smelting tank 2. The second exhaust pipe 25 and the slag discharge pipe 26 are located at both ends of the same diameter passing through the center of the circle.

[0037] Specifically, the first oxygen supply pipe 23 includes an air inlet pipe 231 fixedly connected to the inside of the smelting tank 2. One end of the air inlet pipe 231 extends from the side wall of the smelting tank 2, and the other end extends into the inside of the smelting tank 2 and is fixedly connected to a connecting pipe 232. The connecting pipe 232 is located off-center from the axis of the smelting tank 2, closer to the inner circular side wall of the smelting tank 2, or even fixed to the inner circular side wall of the smelting tank 2. The axis of the connecting pipe 232 is parallel to the axis of the smelting tank 2, and its length is less than the length of the smelting tank 2. Two sets of exhaust pipes 233 are fixedly connected to the connecting pipe 232, each set of exhaust pipes 233 having five exhaust pipes. The number of exhaust pipes 233 can be three, four, six, or more. The two sets of exhaust pipes 233 are symmetrically arranged vertically with the connecting pipe 232 as the axis of symmetry, and the exhaust ports of the two sets of exhaust pipes 233 are vertically aligned, so that oxygen can be released from the inner top and inner bottom of the smelting tank 2 through the exhaust ports of the exhaust pipes 233. The connecting pipe 232 and the two sets of exhaust pipes 233 are all fixedly connected to the inner wall of the smelting tank 2. The outer surface of the air inlet pipe 231 is fixedly connected to a first fixing pipe 234 for installing the first feeding mechanism 24. The first fixing pipe 234 is perpendicular to the air inlet pipe 231 and is distributed above the air inlet pipe 231.

[0038] like Figure 3 As shown, a drive mechanism 3 is installed at the bottom of the placement platform 1 and one end of the smelting tank 2. The drive mechanism 3 is used to drive the smelting tank 2 to rotate. The smelting tank 2 rotates 90 degrees so that the air inlet pipe 231 of the first oxygenation pipe 23 is located at the top of the smelting tank 2, while the feeding pipe 21 and the first exhaust pipe 22 rotate to the side of the smelting tank 2.

[0039] After zinc concentrate is added to the smelting tank 2 through the feeding pipe 21, oxygen is bottom-blown into the zinc concentrate inside the smelting tank 2 through the first oxygen supply pipe 23, thereby oxidizing and smelting the zinc concentrate. The flue gas generated during the oxidation process is discharged through the first exhaust pipe 22. After the zinc concentrate is oxidized and melted into a molten body, the smelting tank 2 is rotated 90 degrees by the drive mechanism 3, so that the air inlet end of the first oxygen supply pipe 23 is rotated to the top of the smelting tank 2, so that the two exhaust ends of the first oxygen supply pipe 23 are located on both sides inside the smelting tank 2, and the zinc concentrate molten body is side-blown for reduction. At this time, oxygen is added again, and the first feeding mechanism 24 is opened, so that the reducing agent inside it follows the oxygen into the molten body inside the smelting tank 2. The flue gas generated during the reduction process is discharged through the second exhaust pipe 25, which is rotated to the top. After the reduction is completed, the slag can be discharged through the slag discharge pipe 26. Since the slag discharge pipe 26 can be driven to rotate to the bottom of the smelting tank 2, it is more convenient to discharge the slag through the slag discharge pipe 26.

[0040] like Figure 1As shown, the support base 11 includes a support block 111 fixedly connected to the upper surface of the placement platform 1. A mounting base 112 is fixedly connected to the top of the support block 111. The mounting base 112 is L-shaped, but it can also be arc-shaped or other shapes. Rollers 113 are rotatably connected to both ends of the mounting base 112. A limiting groove 114 is formed on the outer circumference of the roller 113. A limiting ring is fixedly connected to the outer circumference of the smelting tank 2. The width of the limiting ring is slightly smaller than the width of the limiting groove 114, so that the limiting ring can extend into the interior of the limiting groove 114. When the smelting tank 2 is driven to rotate, the axial movement of the smelting tank 2 is restricted.

[0041] like Figure 4-5 As shown, the first feeding mechanism 24 includes a hydraulic telescopic rod 241 fixedly connected to the outer surface of the air inlet pipe 231. A connecting plate 242 is fixedly connected to the movable end of the hydraulic telescopic rod 241. A connecting rod 243 is fixedly connected to the bottom end of the connecting plate 242 away from the hydraulic telescopic rod 242. A first connecting cylinder 244 is fixedly connected to the bottom of the connecting rod 243. The first connecting cylinder 244 is slidably connected to the inside of the first fixed pipe 234. A feeding hole 245 for adding reducing agent is opened at the top of the first connecting cylinder 244. Four first through slots 246 communicating with the feeding hole 245 are opened on the outer surface of the first connecting cylinder 244. It can be understood that the number of first through slots 246 can be one, two, three, five or even more.

[0042] When a reducing agent needs to be added, the hydraulic telescopic rod 241 descends, causing the first connecting cylinder 244 to pass through the first fixed pipe 234 and enter the interior of the air inlet pipe 231. At this time, the reducing agent inside the first connecting cylinder 244 enters the interior of the air inlet pipe 231 through the first through groove 246 and undergoes a reduction reaction with the zinc concentrate melt along with the oxygen. When no reducing agent needs to be added, the hydraulic telescopic rod 241 drives the first connecting cylinder 244 to rise and reset, so that the first through groove 246 on the first connecting cylinder 244 is closed by the first fixed pipe 234, preventing oxygen from contacting the reducing agent.

[0043] like Figure 3 As shown, the drive mechanism 3 includes a first drive motor 31 fixedly connected to the bottom of the placement platform 1. A first sprocket 32 ​​is fixedly connected to the output end of the first drive motor 31. A second sprocket 33 is fixedly connected to the end of the smelting tank 2 away from the second exhaust pipe 25 and the slag discharge pipe 26. Both the outer surfaces of the first sprocket 32 ​​and the second sprocket 33 are meshed with chains 34 for transmission. When it is necessary to rotate the smelting tank 2, the first drive motor 31 is started to drive the first sprocket 32 ​​to rotate, and then the chain 34 on its outer surface drives the smelting tank 2, which is fixedly connected to the second sprocket 33, to rotate in order to reduce the zinc concentrate melt. The first drive motor is a servo motor, or it can be a stepper motor, a three-phase motor, etc., used in conjunction with a reducer to drive the smelting tank 2 to rotate.

[0044] In this specific embodiment, a support base 11 is provided on the upper surface of the placement platform 1 to install the rotatably connected smelting tank 2, and a first oxygenation pipe 23 is provided inside the smelting tank 2. A first feeding mechanism 24 is provided inside the first oxygenation pipe 23. This not only allows the user to easily perform bottom blowing of oxygen on the zinc concentrate to oxidize it into a molten state, but also allows the smelting tank 2 to be rotated 90 degrees after oxidation so that the first oxygenation pipe 23 becomes a side-blowing mechanism and the reducing agent is added along with the oxygen. This not only avoids heat loss caused by the transfer of raw materials during the reduction of zinc concentrate and reduces safety issues caused by the transfer of raw materials, but also makes it convenient for the user to add the reducing agent and avoids workers being burned by the high-temperature furnace when manually adding materials.

[0045] like Figure 5-8 As shown, this is a second embodiment of the feeding mechanism of the present invention. A second feeding mechanism 27 is sleeved on the outer surface of the smelting tank 2. The second feeding mechanism 27 includes a connecting ring 271 sleeved on the outer surface of the smelting tank 2. When the smelting tank 2 is driven to rotate, the connecting ring 271 and the second feeding mechanism 27 are stationary relative to the placement platform 1. The connecting ring 271 is fixedly connected to the upper surface of the placement platform 1 by a fixing block 272. A second fixing tube 279 is fixedly connected inside the connecting ring 271. A second connecting cylinder 274 is fixedly connected to the top of the inner wall of the second fixing tube 279 by a return spring 273. The second connecting cylinder 274 is away from the return spring 273. One end of 3 is fixedly connected to a guide nozzle 275, which is an inverted cone shape and gradually narrows along the guiding direction. The guide nozzle 275 has a second through groove 276 inside. The outer surface of the connecting ring 271 is fixedly connected to an inlet pipe 277 for feeding the second connecting cylinder 274. The outer surface of the smelting tank 2 has a feed hole 278. When the smelting tank 2 rotates 90 degrees to carry out the reduction reaction, the feed hole 278 corresponds to the position of the second fixed pipe 279. At this time, the guide nozzle 275 enters the interior of the smelting tank 2 under the compression of the return spring 275, and the reducing agent enters the interior of the smelting tank 2 through the second through groove 276.

[0046] like Figure 9-10As shown, in a second embodiment of the oxygen supply pipe of the present invention, a second oxygen supply pipe 28 is installed on the top of the smelting tank 2. The second oxygen supply pipe 28 includes an upper pipe 281 fixedly connected to the top of the interior of the smelting tank 2. A middle pipe 283 is installed at the bottom of the upper pipe 281 through a first universal joint 282, allowing the middle pipe 283 to rotate relative to the upper pipe 281. A bottom pipe 285 is installed at the bottom of the middle pipe 283 through a second universal joint 284. A rotating shaft 286 is rotatably connected to the top of the smelting tank 2. The two rotating shafts 286 are symmetrically distributed, and a second drive motor 287 for driving each of the two rotating shafts 286 is fixedly connected to one end of each shaft. Two adjacent middle pipes 283 are respectively connected through... The connecting rod 2861 is connected to two rotating shafts 286. By starting the two second drive motors 287 respectively, the central tube 283 located on one of the rotating shafts 286 can rotate clockwise, while the central tube 283 on the other rotating shaft 286 can rotate counterclockwise. The central tubes 283 on the two rotating shafts 286 can rotate to a basically parallel position and be arranged in a figure-eight shape. When the central tubes 283 are basically parallel, the central tubes 283 point to the axis of the smelting tank 2. When the central tubes 283 are arranged in a figure-eight shape, the central tubes 283 deviate from the axis of the smelting tank 2 and are close to the inner side wall of the smelting tank 2, so that the second oxygenation pipe 28 can blow sideways when the smelting tank 2 is undergoing a reduction reaction.

[0047] like Figure 11 As shown, in the third embodiment of the oxygenation pipe of the present invention, a guide rod 288 is rotatably connected to the middle of the top of the smelting tank 2. The guide rod 288 is serpentine, and a third drive motor 289 for driving it is fixedly connected to one end of the guide rod 288. The difference from the second embodiment of the oxygenation pipe is that in this embodiment, the middle tube 283 can be rotated to a basically parallel position and arranged in a figure-eight shape by driving the serpentine guide rod 288 with only one third drive motor 289. The structure is simple and easy for users to use.

Claims

1. A lead-zinc ore smelting equipment, characterized in that, include: Placement platform; Support base, installed on top of the placement platform; The smelting tank is rotatably connected to the support base. The top of the smelting tank is equipped with a feeding pipe and a first exhaust pipe. One end of the smelting tank is equipped with a second exhaust pipe and a slag discharge pipe. The second exhaust pipe and the slag discharge pipe are symmetrically distributed at the end edge of the smelting tank. Zinc concentrate enters the smelting tank through the feeding pipe. The first oxygen supply pipe is located on the smelting tank. As the smelting tank rotates, the first oxygen supply pipe switches between a position on the side of the smelting tank and a position on the top of the smelting tank. When the first oxygen supply pipe is located on the side of the smelting tank, oxygen is introduced into the smelting tank and reacts with the zinc concentrate under heating conditions. At the same time, the generated flue gas is discharged from the first exhaust pipe. The first oxygen supply pipe includes an air inlet pipe fixedly connected to the inside of the smelting tank. One end of the air inlet pipe extending into the smelting tank is fixedly connected to a connecting pipe. Two sets of exhaust pipes are fixedly connected to the outer surface of the connecting pipe. The exhaust pipes have an upper end near the top of the smelting tank and a lower end near the bottom of the smelting tank. A first fixing pipe for installing the first feeding mechanism is fixedly connected to the outer surface of the air inlet pipe. Multiple second oxygen supply pipes are installed on the outer surface of the smelting tank. The second oxygen supply pipe includes an upper pipe that is fixedly connected to the inside of the smelting tank. The bottom of the upper pipe is sequentially equipped with a first universal joint, a middle pipe, a second universal joint, and a bottom pipe. The first feeding mechanism is located on the first oxygen supply pipe and rotates synchronously with the first oxygen supply pipe. When the first feeding mechanism moves to the top position of the smelting tank, the reducing agent is added into the interior of the smelting tank to react with the molten zinc concentrate. The flue gas generated by the reduction reaction is discharged through the second exhaust pipe.

2. The lead-zinc ore smelting equipment according to claim 1, characterized in that, The upper surface of the placement platform is fixedly connected to a second feeding mechanism for adding reducing agent. The second feeding mechanism includes a fixed block fixedly connected to the upper surface of the placement platform. A connecting ring is fixedly connected to the upper surface of the fixed block. The connecting ring is sleeved on the outer surface of the smelting tank. A second fixed pipe and an inlet pipe that communicate with each other are fixedly connected to the outer surface of the connecting ring.

3. The lead-zinc ore smelting equipment according to claim 2, characterized in that, The top of the second fixed tube is equipped with a second connecting cylinder via a reset spring, and the bottom of the second connecting cylinder is fixedly connected with a guide nozzle. As the smelting tank rotates, the guide nozzle compresses the reset spring at one end of the second connecting cylinder. The inside of the guide nozzle is provided with a second through groove for discharging the reducing agent inside the second connecting cylinder.

4. The lead-zinc ore smelting equipment according to claim 3, characterized in that, The outer surface of the smelting tank is provided with a feed hole. The feed hole can move to a position corresponding to the guide nozzle as the smelting tank rotates. The compressed return spring is reset and drives the guide nozzle into the feed hole, so that the reducing agent is introduced into the interior of the smelting tank through the guide nozzle and the feed hole.

5. The lead-zinc ore smelting equipment according to claim 1, characterized in that, The smelting tank has two rotating shafts inside, and a second drive motor for driving each shaft is fixedly connected to one end of each shaft. The middle tubes of two adjacent second oxygenation pipes are respectively fixedly connected to one of the rotating shafts via a connecting rod.

6. The lead-zinc ore smelting equipment according to claim 5, characterized in that, The smelting tank is internally rotatably connected to a guide rod for moving the central tube. One end of the guide rod is fixedly connected to a third drive motor for driving it. The guide rod is serpentine in shape.

7. The lead-zinc ore smelting equipment according to claim 1, characterized in that, The first feeding mechanism includes a hydraulic telescopic rod fixedly connected to the outer surface of the air inlet pipe. A connecting plate is fixedly connected to the movable end of the hydraulic telescopic rod. A connecting rod is fixedly connected to the bottom end of the connecting plate away from the hydraulic telescopic rod. A first connecting cylinder is fixedly connected to the bottom of the connecting rod. The first connecting cylinder is slidably connected to the inside of the first fixed pipe. A feeding hole for adding reducing agent is opened at the top of the first connecting cylinder. Four first through slots for introducing reducing agent into the first oxygen supply pipe are opened on the outer surface of the first connecting cylinder.

8. A lead-zinc ore smelting equipment according to any one of claims 1-7, characterized in that, A drive mechanism is installed at the bottom of the placement platform and at one end of the smelting tank. The drive mechanism includes a first drive motor fixedly connected to the bottom of the placement platform, a first sprocket fixedly connected to the output end of the first drive motor, a second sprocket driven by the first sprocket via a chain, and the second sprocket fixedly connected to one end of the smelting tank.

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