A smelting device for extracting valuable metals from smelting slag

Abstract

The present application relates to colored smelting slag processing device technical field, specifically to a kind of smelting device for extracting valuable metal from smelting slag, including furnace shell and smelting furnace body, baffle is fixedly installed in furnace shell interior, feeding port and reducing agent adding port are set in furnace shell top, opening and closing assembly is arranged between furnace shell and smelting furnace body, opening and closing assembly includes drive mechanism and the plugging platform installed on the execution end of drive mechanism;The plugging platform includes platform body, the platform body has extension section, the opening surface of extension section is rotatably installed with slip ring, guiding rod is fixedly installed on slip ring, transmission gear is sleeved on guiding rod, stirring frame is installed in mixing area, transmission gear is engaged with stirring frame and is driven, using the linkage design of opening and closing assembly and stirring frame, in the process of plugging platform one-time lifting, three processes of mixing closed, material falling station switching, grading screening discharge are sequentially completed, the contact condition of reducing agent and valuable metal oxide is improved, and the comprehensive utilization efficiency of non-ferrous smelting slag is improved.

Description

Technical Field

[0001] This invention relates to the field of non-ferrous smelting slag treatment equipment, specifically a smelting device for extracting valuable metals from smelting slag. Background Technology

[0002] With the continued growth of global non-ferrous metal consumption, the pyrometallurgical smelting capacity for metals such as copper, lead, and zinc is constantly expanding. In addition to producing the main metals, the pyrometallurgical process also generates a large amount of smelting waste slag. This slag typically contains a certain amount of valuable metals (such as copper, gold, silver, and lead) as well as usable elements such as iron. Therefore, the comprehensive utilization of non-ferrous smelting slag is not only an important issue in resource recycling but also a key approach to solving the environmental pollution and safety hazards caused by solid waste stockpiling. Existing technologies for the comprehensive utilization of non-ferrous smelting slag mainly follow the process routes based on "depleted electric furnaces" or "fuming furnaces". These traditional methods typically involve directly feeding hot molten slag into depleted electric furnaces for settling and separation, or using fuming furnaces for reduction and volatilization to recover volatile metals such as zinc and lead.

[0003] Whether in an electric furnace or a reverberatory furnace, the materials inside the furnace mainly rely on natural diffusion or simple raking, making it difficult to achieve uniform mixing of solid reducing agents and solid slag at the microscopic level. This results in insufficient contact between the reducing agent and valuable metal oxides during subsequent smelting, poor reaction kinetics, and directly leads to excessive entrainment loss of valuable metals in the tailings, making it difficult to improve the recovery rate. Summary of the Invention

[0004] The purpose of this invention is to provide a smelting apparatus for extracting valuable metals from smelting slag, in order to solve the problem mentioned in the background art that during the smelting process, the reducing agent and the valuable metal oxides do not come into sufficient contact, the reaction kinetics are poor, which directly leads to excessive entrainment loss of valuable metals in the tailings and makes it difficult to improve the recovery rate.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A smelting apparatus for extracting valuable metals from smelting slag includes a furnace shell and a smelting furnace body disposed at the bottom of the furnace shell. A partition is fixedly installed inside the furnace shell, dividing the interior into a mixing zone and a separation zone. A feed inlet and a reducing agent addition port, communicating with the mixing zone, are provided at the top of the furnace shell. An opening and closing assembly is provided between the furnace shell and the smelting furnace body. The opening and closing assembly includes a drive mechanism fixedly installed at the top of the furnace shell and a blocking platform installed on the actuating end of the drive mechanism. The blocking platform includes a platform body, the outer circumferential surface of which is sealed to the central discharge hole of the partition and the feed port of the smelting furnace body, respectively. The platform body has an extension section, and a slip ring is rotatably mounted on the opening surface of the extension section. A guide rod is fixedly installed on the slip ring, and a transmission gear is sleeved on the guide rod. The shaft of the transmission gear is connected to the drive mechanism. A stirring frame is installed in the mixing zone, and the transmission gear meshes with the stirring frame for transmission.

[0006] Preferably, the stirring frame includes a support base fixedly installed on the wall of the material discharge hole in the center of the partition plate, a shaft ring rotatably mounted on the support base, at least one stirring rod fixedly mounted on the outer circumferential surface of the shaft ring, and a first internal gear ring structure provided on the inner wall of the shaft ring, with the transmission gear meshing with the first internal gear ring structure.

[0007] Preferably, a first spring is sleeved on the guide rod, and the two ends of the first spring are fixedly connected to the stepped surface at the top of the guide rod and the surface of the transmission gear, respectively.

[0008] Preferably, a first annular groove is formed on the outer surface of the platform extension section, and a second annular groove is formed at the end of the platform near the smelting furnace body. At least one irregular groove is connected between the first annular groove and the second annular groove. An embedded frame is installed in the first annular groove, the second annular groove, and the irregular groove. The embedded frame is located at one end in the first annular groove, and its inner wall is provided with a second internal gear ring structure, which meshes with a transmission gear. At least one screening arm is fixedly installed on the embedded frame.

[0009] Preferably, a plug rod is fixedly installed on one end of the embedding frame located in the first annular groove, and a slot adapted to the plug rod is provided on the platform, with a second spring abutting between the plug rod and the bottom of the slot.

[0010] Preferably, a third spring is sleeved on the guide rod, the upper end of the third spring abutting against the lower surface of the transmission gear, and the lower end of the third spring abutting against the upper end face of the extension section of the platform.

[0011] Preferably, a pressurizing mechanism is installed inside the platform, the pressurizing mechanism has an air intake port, and an air pipe connected to the air intake port is installed at the bottom of the platform. The end of the air pipe away from the air intake port extends into the melting furnace body. A flow channel is opened inside the embedded frame. One end of the flow channel is connected to the internal cavity of the platform, and the other end is connected to at least one exhaust port opened on the screening arm.

[0012] Preferably, the pressurizing mechanism includes a horizontal plate and a first scroll plate fixedly installed inside the platform. The first scroll plate has an inwardly concave arc-shaped scroll surface. A first sub-plate is slidably installed on the side of the horizontal plate near the first scroll plate, and the sliding direction of the first sub-plate is set along a first horizontal direction. A second sub-plate is slidably installed on the side of the first sub-plate near the first scroll plate, and the sliding direction of the second sub-plate is set along a second horizontal direction. The first horizontal direction and the second horizontal direction are perpendicular to each other. A second scroll plate is fixedly installed on the second sub-plate, and the outer contour of the second scroll plate is adapted to the scroll surface of the first scroll plate. A rotating shaft is fixedly connected to one end of the transmission gear near the horizontal plate. A shift fork is eccentrically installed on the rotating shaft. A receiving rod is eccentrically provided on the horizontal plate. The receiving rod passes through the elongated guide holes on the first and second sub-plates in sequence and slides with the second sub-plate.

[0013] Preferably, the bottom surface of the furnace shell is provided with screening holes, and a slag receiving trough plate is installed on the bottom outer side of the smelting furnace body.

[0014] Preferably, the driving mechanism includes a frame fixedly mounted on the furnace shell, a hydraulic cylinder fixedly mounted on the frame, a connecting shaft slidably mounted vertically inside the furnace shell, the upper end of the connecting shaft extending out of the furnace shell and fixedly connected to the piston rod of the hydraulic cylinder; a first bevel gear rotatably mounted on the furnace shell, the first bevel gear being sleeved on the connecting shaft and splinedly connected to the connecting shaft, so that the connecting shaft can slide axially relative to the first bevel gear; a drive motor fixedly mounted on the furnace shell, the output end of the drive motor being fixedly connected to a second bevel gear, the second bevel gear meshing with the first bevel gear.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. By utilizing the linkage design of the opening and closing components and the stirring rack, the three processes of mixing and sealing, material dropping station switching, and graded screening and discharge are completed sequentially during the lifting and lowering of the blockage platform. This not only eliminates the need for a separate mixing drive device, but also avoids the problem of uneven mixing caused by the natural diffusion of materials in traditional electric furnaces. It significantly improves the contact conditions between the reducing agent and valuable metal oxides, and enhances the comprehensive utilization and reaction kinetic efficiency of non-ferrous smelting slag.

[0016] 2. Utilizing a composite motion screening structure composed of an embedded frame and a shaped groove, the screening arm performs a combined rotational and axial reciprocating motion within the separation zone under the drive of the transmission gear. This dynamically screens and agitates the falling material, enabling efficient separation of the denser metal phase or high-metal-content slag phase from the low-density tailings. This reduces the entrainment loss of valuable metals in the tailings and improves the recovery rate.

[0017] 3. By utilizing the synergistic effect of the pressurization mechanism and the gas circulation, the high-temperature reducing gas in the melting furnace is drawn in and injected into the separation zone at high speed through the quasi-revolutionary oscillation of the second vortex within the first vortex. Without adding an external heat source, the material is subjected to high-temperature gas permeation and secondary reduction, realizing the recycling of waste heat and reducing atmosphere, and reducing energy consumption and reducing agent consumption. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the furnace shell of the present invention; Figure 3 This is a schematic diagram of the internal structure of the partition plate of the present invention; Figure 4 This is a schematic diagram of the opening and closing component structure of the present invention; Figure 5 This is a schematic diagram of the blocking platform structure of the present invention; Figure 6 This is a schematic diagram of the internal structure of the blocking platform of the present invention; Figure 7 This is a schematic diagram of the second vortex disk mounting structure of the present invention; Figure 8 This is a schematic diagram of the embedding frame mounting structure of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of the A-structure.

[0019] In the attached diagram, the components represented by each number are as follows: 10. Furnace shell; 11. Baffle plate; 101. Mixing zone; 102. Separation zone; 12. Feed inlet; 13. Reducing agent addition port; 14. Screening holes; 20. Smelting furnace body; 21. Slag receiving trough plate; 30. Opening / closing assembly; 31. Drive mechanism; 311. Stand; 312. Hydraulic cylinder; 313. Connecting shaft; 314. First bevel gear; 315. Drive motor; 316. Second bevel gear; 32. Blocking platform; 321. Platform body; 301. Extension section; 302. First annular groove; 303. Second annular groove; 304. Irregular groove; 305. Slot; 322. Slip ring; 323. Guide rod; 324. Transmission gear; 325. First spring 326. Spring; 327. Third spring; 33. Air tube; 34. Embedded frame; 35. Second internal gear ring structure; 36. Insert rod; 37. Second spring; 38. Flow channel; 39. Screening arm; 306. Exhaust port; 31. Pressurizing mechanism; 327. Intake port; 328. Horizontal plate; 329. First scroll plate; 320. First dividing plate; 321. Second dividing plate; 322. Second scroll plate; 333. Rotating shaft; 34. Shift fork; 354. Receiving rod; 40. Stirring rack; 41. Support base; 42. Shaft ring; 421. First internal gear ring structure; 43. Stirring rod. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: The present invention provides a technical solution: such as Figure 1 - Figure 9 The smelting apparatus shown is for extracting valuable metals from smelting slag. It includes a furnace shell 10 and a smelting furnace body 20 disposed at the bottom of the furnace shell 10. A partition 11 is fixedly installed inside the furnace shell 10, which divides the interior of the furnace shell 10 into a mixing zone 101 and a separation zone 102. The top of the furnace shell 10 has a feed port 12 and a reducing agent addition port 13 that communicate with the mixing zone 101, which are used to add crushed smelting slag and solid reducing agent, such as coke powder, coal powder or carbon powder, to the mixing zone 101, respectively. An opening and closing component 30 is provided between the furnace shell 10 and the smelting furnace body 20 to control the opening and closing between the mixing zone 101 and the smelting furnace body 20. The opening and closing component 30 includes a drive mechanism 31 fixedly installed on the top of the furnace shell 10 and a blocking platform 32 installed on the actuating end of the drive mechanism 31.

[0022] Reference Figure 2 - Figure 4The drive mechanism 31 includes a support frame 311 fixedly mounted on the furnace shell 10, a hydraulic cylinder 312 fixedly mounted on the support frame 311, a connecting shaft 313 slidably mounted vertically inside the furnace shell 10, the upper end of the connecting shaft 313 extending out of the furnace shell 10 and fixedly connected to the piston rod of the hydraulic cylinder 312; a first bevel gear 314 rotatably mounted on the furnace shell 10, the first bevel gear 314 being sleeved on the connecting shaft 313 and splinedly connected to the connecting shaft 313, so that the connecting shaft 313 can slide axially relative to the first bevel gear 314; a drive motor 315 fixedly mounted on the furnace shell 10, a second bevel gear 316 fixedly connected to the output end of the drive motor 315, the second bevel gear 316 meshing with the first bevel gear 314.

[0023] The blocking platform 32 includes a platform body 321. The outer peripheral surface of the platform body 321 is sealed and fitted with the central material drop hole of the partition plate 11 and the feed port of the smelting furnace body 20, respectively. The platform body 321 has an extension section 301. A slip ring 322 is rotatably mounted on the open surface of the extension section 301. A guide rod 323 is fixedly mounted on the slip ring 322. The number of guide rods 323 is preferably 5-6. A transmission gear 324 is sleeved on the guide rod 323. The shaft of the transmission gear 324 is connected to the drive mechanism 31. Specifically, the shaft of the transmission gear 324 is connected to the lower end of the connecting shaft 313, so that the transmission gear 324 is driven by the drive motor 315 through the first bevel gear 314 and the second bevel gear 316 to rotate. A stirring rack 40 is installed in the mixing zone 101. The transmission gear 324 meshes with the stirring rack 40 for transmission.

[0024] Reference Figure 4 and Figure 5 The stirring frame 40 includes a support base 41 fixedly installed on the wall of the central material drop hole of the partition plate 11. A shaft ring 42 is rotatably installed on the support base 41. At least one stirring rod 43 is fixedly installed on the outer circumferential surface of the shaft ring 42. The number of stirring rods 43 is preferably 5-6. The inner wall of the shaft ring 42 is provided with a first internal gear ring structure 421. The transmission gear 324 meshes with the first internal gear ring structure 421.

[0025] Furthermore, a first spring 325 is sleeved on the guide rod 323, and the two ends of the first spring 325 are fixedly connected to the stepped surface at the top of the guide rod 323 and the surface of the transmission gear 324, respectively.

[0026] In the initial state, the hydraulic cylinder 312 is in the retracted state, and the blocking platform 32 blocks the central material drop hole of the partition plate 11. The mixing zone 101 and the smelting furnace body 20 are not connected. At this time, the first spring 325 is compressed, so that the meshing of the transmission gear 324 and the first internal gear ring structure 421 remains stable.

[0027] During operation, smelting slag and reducing agent enter the mixing zone 101 through the feed inlet 12 and the reducing agent addition inlet 13, respectively. The drive motor 315 is started, and the drive motor 315 drives the connecting shaft 313 to rotate through the second bevel gear 316 and the first bevel gear 314, which in turn drives the transmission gear 324 to rotate. The transmission gear 324 drives the stirring frame 40 to rotate around the vertical axis through meshing with the first internal gear ring structure 421. The stirring rod 43 forcibly stirs and mixes the smelting slag and reducing agent in the mixing zone 101.

[0028] Once the mixture is homogeneous, the hydraulic cylinder 312 extends, causing the connecting shaft 313, slip ring 322, and platform 321 to move downwards as a whole, opening the central discharge hole of the partition 11. At this time, the homogeneous material in the mixing zone 101 falls under the action of gravity and enters the smelting furnace 20 through the central discharge hole for high-temperature smelting, so as to achieve the reduction and enrichment of valuable metals.

[0029] Example 2: This example further optimizes the structure of the blockage platform 32 and the bottom of the furnace shell 10, aiming to introduce high-temperature and high-pressure gas while forcing mechanical mixing, use the heat energy in the melting furnace body 20 to drive the reduction reaction, and achieve graded discharge of valuable components and tailings.

[0030] Reference Figure 5 - Figure 9 The outer surface of the extension section 301 of the platform 321 is provided with a first annular groove 302, and the end of the platform 321 near the melting furnace body 20 is provided with a second annular groove 303. At least one irregular groove 304 is connected between the first annular groove 302 and the second annular groove 303. An embedded frame 33 is installed in the first annular groove 302, the second annular groove 303 and the irregular groove 304. The embedded frame 33 is located at one end in the first annular groove 302. Its inner wall is provided with a second internal gear ring structure 331. The second internal gear ring structure 331 meshes with the transmission gear 324. At least one screening arm 34 is fixedly installed on the embedded frame 33. The number of screening arms 34 is preferably 5-6, which are used to move and screen the falling material.

[0031] Reference Figure 9 An insert rod 332 is fixedly installed on one end of the embedding frame 33 located in the first annular groove 302. A slot 305 adapted to the insert rod 332 is provided on the platform 321. A second spring 333 abuts between the insert rod 332 and the bottom of the slot 305, so that the embedding frame 33 has floating performance.

[0032] A third spring 326 is sleeved on the guide rod 323. The upper end of the third spring 326 abuts against the lower surface of the transmission gear 324, and the lower end of the third spring 326 abuts against the upper end surface of the extension section 301 of the platform 321.

[0033] Furthermore, a pressurizing mechanism 35 is installed inside the platform 321. The pressurizing mechanism 35 has an air intake 306. A gas pipe 327 connected to the air intake 306 is installed at the bottom of the platform 321. One end of the gas pipe 327 away from the air intake 306 extends into the smelting furnace body 20 to draw in high-temperature flue gas. A flow channel 334 is opened inside the embedded frame 33. One end of the flow channel 334 is connected to the internal cavity of the platform 321, and the other end is connected to at least one exhaust port 341 opened on the screening arm 34. When the embedded frame 33 moves, high-temperature and high-pressure gas is ejected from the exhaust port 341 through the air intake 306 and the flow channel 334, directly acting on the smelting slag and reducing agent in the mixing zone 101.

[0034] Reference Figure 6 and Figure 7 The pressurization mechanism 35 includes a horizontal plate 351 and a first scroll plate 352 fixedly installed inside the platform 321. The first scroll plate 352 has an inwardly concave arc-shaped scroll surface. A first sub-plate 353 is slidably installed on the side of the horizontal plate 351 near the first scroll plate 352. The sliding direction of the first sub-plate 353 is set along a first horizontal direction. A second sub-plate 354 is slidably installed on the side of the first sub-plate 353 near the first scroll plate 352. The sliding direction of the second sub-plate 354 is set along a second horizontal direction. The first horizontal direction and the second horizontal direction are perpendicular to each other. A second scroll plate 355 is fixedly installed on the second sub-plate 354. The outer contour of the second scroll plate 355 is adapted to and fitted with the scroll surface of the first scroll plate 352 to form a sealed compression cavity.

[0035] A rotating shaft 356 is fixedly connected to one end of the transmission gear 324 near the horizontal plate 351. A shift fork 357 is eccentrically mounted on the rotating shaft 356, and a receiving rod 358 is eccentrically arranged on the horizontal plate 351. The receiving rod 358 passes through the elongated guide holes on the first sub-disc 353 and the second sub-disc 354 in sequence and slides with the second sub-disc 354. When the transmission gear 324 rotates, the shift fork 357 drives the first sub-disc 353 and the second sub-disc 354 to perform positive and negative reciprocating motion through the receiving rod 358, thereby causing the second vortex 355 to perform a kind of revolution-like oscillating motion in the first vortex 352, periodically changing the volume of the vortex cavity, continuously compressing the inhaled high-temperature flue gas, and realizing the pressurized delivery of flue gas.

[0036] Furthermore, a screening hole 14 is provided on the bottom surface of the furnace shell 10, and a slag receiving trough plate 21 is installed on the bottom outer side of the smelting furnace body 20.

[0037] It should be noted that an exhaust pipe (not shown in the figure) for collecting flue gas can be added to the bottom surface of the furnace shell 10 to discharge the high-temperature reducing flue gas overflowing from the separation zone 102, so as to realize the centralized recycling and reuse of flue gas.

[0038] When the smelting slag and reducing agent enter the mixing zone 101, the platform 321 is tightly attached to the central discharge hole of the partition 11. At this time, the embedding frame 33 is forced to be completely embedded in the irregular groove 304 by the abutment of the edge of the central discharge hole, ensuring that the mixing zone 101 has good sealing performance. After forced mixing, the hydraulic cylinder 312 extends, pushing the connecting shaft 313 and the transmission gear 324 to move downward as a whole. The platform 321 moves downward synchronously. The platform 321 moves down until its outer circumference is sealed with the feed port of the smelting furnace body 20, cutting off the direct connection between the smelting furnace body 20 and the outside world. The central discharge hole of plate 11 is opened, and the mixed material falls into the separation zone 102 formed between the partition plate 11 and the inner bottom surface of the furnace shell 10 under the action of gravity. As the transmission gear 324 continues to descend, the embedded frame 33 is released from the abutment restriction of the edge of the central discharge hole. Under the elastic restoring force of the second spring 333, it resets outward along the irregular groove 304, so that the second internal gear ring structure 331 and the transmission gear 324 are stably meshed. The transmission gear 324 continues to rotate, driving the embedded frame 33 to perform compound reciprocating motion along the irregular groove 304. The screening arm 34 rotates synchronously in the separation zone 102. The oscillating motion dynamically screens the falling material. During this process, the transmission gear 324 drives the shift fork 357 to rotate via the rotating shaft 356. The shift fork 357 moves eccentrically with the rotating shaft 356, causing the second sub-disc 354 and the first sub-disc 353 to reciprocate along the orthogonal direction constrained by the receiving rod 358. This causes the second vortex 355 to oscillate within the first vortex 352, periodically changing the effective ventilation area of ​​the intake port 306. This draws the high-temperature reducing gas from the smelting furnace body 20 into the platform body 321, and then through the flow channel 3 inside the embedded frame 33. The exhaust port 341 on the screening arm 34 sprays out at high speed to carry out high-temperature gas penetration and reduction enhancement of the material. The metal phase or high metal content slag phase after enhancement and reduction has a large density. Under the action of gravity and the tossing action of the screening arm 34, it cannot pass through the screening hole 14 opened on the bottom surface of the furnace shell 10. Instead, it gathers at the bottom of the furnace shell 10. After the platform 321 rises and opens again, it falls into the smelting furnace body 20 for further enrichment and separation. The tail slag that is not fully reduced or has a small density passes through the screening hole 14 and falls into the slag receiving trough plate 21 to be discharged, which improves the comprehensive utilization of non-ferrous smelting slag. After a single screening and reduction is completed, the hydraulic cylinder 312 retracts, the blocking platform 32 is reset upwards as a whole, and the platform body 321 re-seals the material discharge hole of the partition plate 11; the large particles of high-metal slag retained in the separation zone 102 fall into the smelting furnace body 20 along the central hole and are deeply enriched; the embedded frame 33 is squeezed and contracted again by the material discharge hole, and the equipment returns to the initial mixing station to start the next processing cycle.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smelting apparatus for extracting valuable metals from smelting slag, comprising a furnace shell (10) and a smelting furnace body (20) disposed at the bottom of the furnace shell (10), characterized in that: A partition (11) is fixedly installed inside the furnace shell (10). The partition (11) divides the interior of the furnace shell (10) into a mixing zone (101) and a separation zone (102). The top of the furnace shell (10) is provided with a feed inlet (12) and a reducing agent addition inlet (13) that communicate with the mixing zone (101). An opening and closing assembly (30) is provided between the furnace shell (10) and the smelting furnace body (20). The opening and closing assembly (30) includes a drive mechanism (31) fixedly installed on the top of the furnace shell (10) and a blocking platform (32) installed on the execution end of the drive mechanism (31). The blocking platform (32) includes a platform body (321). The outer peripheral surface of the platform body (321) is sealed and fitted with the central material drop hole of the partition plate (11) and the feed port of the smelting furnace body (20). The platform body (321) has an extension section (301). A slip ring (322) is rotatably installed on the opening surface of the extension section (301). A guide rod (323) is fixedly installed on the slip ring (322). A transmission gear (324) is sleeved on the guide rod (323). The shaft of the transmission gear (324) is connected to the drive mechanism (31). A stirring rack (40) is installed in the mixing zone (101). The transmission gear (324) meshes with the stirring rack (40) for transmission.

2. The smelting apparatus for extracting valuable metals from smelting slag according to claim 1, characterized in that: The stirring rack (40) includes a support base (41) fixedly installed on the wall of the central material drop hole of the partition plate (11). A shaft ring (42) is rotatably installed on the support base (41). At least one stirring rod (43) is fixedly installed on the outer circumferential surface of the shaft ring (42). The inner wall of the shaft ring (42) is provided with a first internal gear ring structure (421). The transmission gear (324) meshes with the first internal gear ring structure (421).

3. A smelting apparatus for extracting valuable metals from smelting slag according to claim 1 or 2, characterized in that: A first spring (325) is sleeved on the guide rod (323), and the two ends of the first spring (325) are fixedly connected to the stepped surface at the top of the guide rod (323) and the surface of the transmission gear (324), respectively.

4. A smelting apparatus for extracting valuable metals from smelting slag according to claim 1, characterized in that: The outer surface of the extension section (301) of the platform (321) is provided with a first annular groove (302), and the end of the platform (321) near the melting furnace body (20) is provided with a second annular groove (303). At least one irregular groove (304) is connected between the first annular groove (302) and the second annular groove (303). An embedded frame (33) is installed in the first annular groove (302), the second annular groove (303) and the irregular groove (304). The embedded frame (33) is located at one end in the first annular groove (302), and its inner wall is provided with a second internal gear ring structure (331). The second internal gear ring structure (331) meshes with the transmission gear (324). At least one screening arm (34) is fixedly installed on the embedding frame (33).

5. A smelting apparatus for extracting valuable metals from smelting slag according to claim 4, characterized in that: The insert (332) is fixedly installed on one end of the embedding frame (33) located in the first annular groove (302). The platform (321) has a slot (305) adapted to the insert (332). A second spring (333) abuts between the insert (332) and the bottom of the slot (305).

6. A smelting apparatus for extracting valuable metals from smelting slag according to claim 1, characterized in that: A third spring (326) is sleeved on the guide rod (323). The upper end of the third spring (326) abuts against the lower surface of the transmission gear (324), and the lower end of the third spring (326) abuts against the upper surface of the extension section (301) of the platform (321).

7. A smelting apparatus for extracting valuable metals from smelting slag according to claim 4, characterized in that: The platform (321) is equipped with a pressurizing mechanism (35), which has an air intake (306). The bottom of the platform (321) is equipped with an air pipe (327) that communicates with the air intake (306). The end of the air pipe (327) away from the air intake (306) extends into the melting furnace body (20). The embedded frame (33) has a flow channel (334) inside. One end of the flow channel (334) is connected to the cavity inside the platform (321), and the other end is connected to at least one exhaust port (341) on the screening arm (34).

8. A smelting apparatus for extracting valuable metals from smelting slag according to claim 7, characterized in that: The pressurization mechanism (35) includes a horizontal plate (351) and a first scroll plate (352) fixedly installed inside the platform (321). The first scroll plate (352) has an inwardly concave arc-shaped scroll surface. A first sub-plate (353) is slidably installed on the side of the horizontal plate (351) near the first scroll plate (352). The sliding direction of the first sub-plate (353) is set along a first horizontal direction. A second sub-plate (354) is slidably installed on the side of the first sub-plate (353) near the first scroll plate (352). The sliding direction of the second sub-plate (354) is set along a second horizontal direction. The first horizontal direction and the second horizontal direction are perpendicular to each other. A second scroll plate (355) is fixedly installed on the second sub-plate (354). The outer contour of the second scroll plate (355) is adapted to the scroll surface of the first scroll plate (352). The transmission gear (324) is fixedly connected to a rotating shaft (356) at one end near the horizontal plate (351). A shift fork (357) is eccentrically mounted on the rotating shaft (356). A receiving rod (358) is eccentrically provided on the horizontal plate (351). The receiving rod (358) passes through the elongated guide holes on the first sub-plate (353) and the second sub-plate (354) in sequence and slides with the second sub-plate (354).

9. A smelting apparatus for extracting valuable metals from smelting slag according to claim 1, characterized in that: The bottom surface of the furnace shell (10) is provided with a screening hole (14), and the bottom of the outer side of the smelting furnace body (20) is provided with a slag receiving trough plate (21).

10. A smelting apparatus for extracting valuable metals from smelting slag according to claim 1, characterized in that: The drive mechanism (31) includes a stand (311) fixedly installed on the furnace shell (10), a hydraulic cylinder (312) fixedly installed on the stand (311), and a connecting shaft (313) slidably installed in the furnace shell (10) along the vertical direction. The upper end of the connecting shaft (313) extends out of the furnace shell (10) and is fixedly connected to the piston rod of the hydraulic cylinder (312). A first bevel gear (314) is rotatably mounted on the furnace shell (10). The first bevel gear (314) is sleeved on the connecting shaft (313) and splinedly connected to the connecting shaft (313) so that the connecting shaft (313) can slide axially relative to the first bevel gear (314). A drive motor (315) is fixedly installed on the furnace shell (10). A second bevel gear (316) is fixedly connected to the output end of the drive motor (315). The second bevel gear (316) meshes with the first bevel gear (314).

Images