A reduction furnace for nickel alloy production

Abstract

The utility model discloses a kind of reduction furnaces for nickel alloy preparation, it is related to nickel alloy preparation technical field, including reduction furnace, limit seat, preparation cylinder, the inside of preparation cylinder is provided with stirring auxiliary assembly, the outer end of the bottom of guide disc is connected with multiple connecting rods, multiple the outer wall of connecting rod is all sleeved with multiple movable sleeves, multiple movable sleeves outer wall is all connected with auxiliary stirring rod, rotating motor drive coupling drives rotating shaft rotation, realize driving limit disc bottom stirring auger rotation, the nickel alloy in reduction furnace is stirred and mixed work, limit cylinder, reinforcing fan piece reinforce the use of rotating shaft, guide disc, fixed ring improve the use stability of multiple connecting rods, the movable sleeve of multiple connecting rods outer wall is followed with the rotation of connecting rod and rotates on its outer wall, realize driving multiple auxiliary stirring rod rotation, auxiliary stirring work is carried out to nickel alloy, in mixed tooth piece and mixing rod realize the work of even mixing of nickel alloy.

Description

Technical Field

[0001] This utility model relates to the field of nickel alloy preparation technology, and in particular to a reduction furnace for nickel alloy preparation. Background Technology

[0002] Nickel alloys hold an irreplaceable position in cutting-edge industrial fields such as aerospace, petrochemicals, energy and power, and marine engineering due to their excellent high-temperature resistance, corrosion resistance, high strength, and good comprehensive mechanical properties. In the smelting and preparation process of nickel alloys, the reduction process is a crucial step. This process typically takes place at high temperatures, using reducing agents (such as hydrogen, carbon monoxide, or solid carbon) to reduce nickel oxides (such as nickel oxide) to metallic nickel, followed by preliminary melting and mixing with other alloying elements. The reduction furnace, as the core equipment in this process, directly determines the compositional uniformity, purity, and mechanical properties of the final nickel alloy product, and is a key factor affecting product quality and yield. Currently, traditional nickel alloy reduction furnaces, especially small and medium-sized batch production reduction furnaces, mainly rely on the following technologies for internal material mixing, but these technologies generally have obvious limitations:

[0003] Early reduction furnaces were mostly static kilns, where materials remained stationary within the furnace. Mixing was facilitated solely by the introduction of reducing gases for convection and mass transfer, or by slight vibrations of the furnace body. The lack of relative movement within the materials resulted in slow and uneven heat and mass transfer. Significant temperature and concentration gradients existed between different areas of the furnace (e.g., center to edge, upper to lower layers), easily leading to incomplete reduction reactions, over-burning of some materials, and insufficient reduction in others. Due to the lack of effective mechanical stirring, alloying elements of different densities (e.g., chromium, molybdenum, tungsten) settled or floated under gravity, resulting in severe compositional segregation in the final product, failing to meet the stringent requirements for compositional uniformity in high-performance alloys.

[0004] To address the above problems, it is necessary to design a reduction furnace for nickel alloy preparation to overcome these issues. Utility Model Content

[0005] The main objective of this invention is to provide a reduction furnace for nickel alloy preparation, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A reduction furnace for preparing nickel alloys includes a reduction furnace, a limiting seat, and a preparation cylinder, wherein a stirring auxiliary component is provided inside the preparation cylinder; The stirring auxiliary assembly includes a coupling disposed at the top of the preparation cylinder. The output end of the coupling is connected to a rotating shaft. A limiting disc is sleeved on the outer wall of the rotating shaft near the coupling. A limiting cylinder is connected to the bottom of the rotating shaft. Reinforcing blades are connected to the outer wall of the limiting cylinder. A guide disc is connected to the end of the reinforcing blades away from the limiting cylinder. A fixing ring is connected to the top of the guide disc. Multiple stirring augers are connected to the bottom of the limiting disc. Multiple connecting rods are connected to the outer end of the bottom of the guide disc. Multiple movable sleeves are sleeved on the outer walls of the multiple connecting rods. Auxiliary stirring rods are connected to the outer walls of the multiple movable sleeves.

[0007] As a preferred embodiment of this utility model, a fixing cylinder is connected to the inner side of the limiting seat, a plurality of mixing teeth are connected to the inner side of the fixing cylinder, a plurality of mixing rods are connected to the inner side of each of the plurality of mixing teeth, a control box is connected to one end of the reduction furnace, a feed inlet is connected to the end of the outer wall of the reduction furnace near the control box, a sealing plate is connected to the top of the reduction furnace, and a rotary motor is connected to the top of the sealing plate.

[0008] As a preferred embodiment of this utility model, the coupling is drivenly connected to the rotating shaft, the rotating shaft is rotatably connected to the limiting cylinder, and the limiting cylinder is fixedly connected to the reinforced fan blade.

[0009] As a preferred embodiment of this utility model, the end of the reinforcing fan blade away from the limiting cylinder is fixedly connected to the inner side of the guide plate, and the guide plate is fixedly connected to the fixing ring.

[0010] In a preferred embodiment of this utility model, the fixing ring is rotatably connected to the stirring auger, the top of the stirring auger is rotatably connected to the bottom of the limiting plate, the limiting plate is sleeved on the outer wall of the rotating shaft near the end of the coupling, and the fixing ring is threadedly fixedly connected to a plurality of the connecting rods.

[0011] As a preferred embodiment of this utility model, multiple movable sleeves are fitted onto the outer wall of the connecting rod, the movable sleeves are fixedly connected to the auxiliary stirring rod, and the bottoms of the multiple connecting rods are rotatably connected to the top of the fixed cylinder.

[0012] In a preferred embodiment of this utility model, the fixed cylinder is fixedly connected to the mixing toothed plate, the plurality of mixing toothed plates are fixedly connected to the mixing rod, and the bottom of the preparation cylinder is in contact with the outer wall of the top of the fixed cylinder.

[0013] Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: This reduction furnace for nickel alloy preparation uses a rotary motor to drive a coupling that rotates a shaft, which in turn rotates the bottom stirring auger of the limiting disk to mix the nickel alloy inside the furnace. A limiting cylinder and reinforcing fan blades reinforce the rotating shaft, while a guide plate and fixing ring improve the stability of the multiple connecting rods. Movable sleeves on the outer walls of the connecting rods rotate along with them, driving multiple auxiliary stirring rods to perform auxiliary stirring of the nickel alloy. Mixing teeth and mixing rods ensure uniform mixing of the nickel alloy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the preparation cylinder installation structure of this utility model; Figure 3 This is a schematic diagram of the rotating shaft mounting structure of this utility model; Figure 4 This is a schematic diagram of the installation structure of the stirring auger of this utility model; Figure 5 This is a schematic diagram of the installation structure of the auxiliary stirring rod of this utility model.

[0015] In the diagram: 1. Reduction furnace; 2. Limiting seat; 3. Control box; 4. Feed inlet; 5. Sealing disc; 6. Rotary motor; 7. Preparation cylinder; 8. Fixed cylinder; 9. Mixing toothed blade; 10. Mixing rod; 11. Coupling; 12. Limiting disc; 13. Rotating shaft; 14. Limiting cylinder; 15. Reinforcing fan blade; 16. Guide disc; 17. Fixing ring; 18. Stirring auger; 19. Connecting rod; 20. Movable sleeve; 21. Auxiliary stirring rod. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] like Figures 1-5 As shown, a reduction furnace for nickel alloy preparation includes a reduction furnace 1, a limiting seat 2, and a preparation cylinder 7, wherein a stirring auxiliary component is provided inside the preparation cylinder 7. The stirring auxiliary assembly includes a coupling 11 disposed at the top of the preparation cylinder 7. The output end of the coupling 11 is connected to a rotating shaft 13. A limiting disk 12 is sleeved on the outer wall of the rotating shaft 13 near the coupling 11. A limiting cylinder 14 is connected to the bottom of the rotating shaft 13. A reinforcing fan blade 15 is connected to the outer wall of the limiting cylinder 14. A guide disk 16 is connected to the end of the reinforcing fan blade 15 away from the limiting cylinder 14. A fixing ring 17 is connected to the top of the guide disk 16. Multiple stirring augers 18 are connected to the bottom of the limiting disk 12. Multiple connecting rods 19 are connected to the outer end of the bottom of the guide disk 16. Multiple movable sleeves 20 are sleeved on the outer walls of the multiple connecting rods 19. Auxiliary stirring rods 21 are connected to the outer walls of the multiple movable sleeves 20. Coupling 11 is connected to rotating shaft 13 for transmission. Rotating shaft 13 is rotatably connected to limiting cylinder 14. Limiting cylinder 14 is fixedly connected to reinforcing fan blade 15. The end of reinforcing fan blade 15 away from limiting cylinder 14 is fixedly connected to the inner side of guide plate 16. Guide plate 16 is fixedly connected to fixing ring 17. Fixing ring 17 is rotatably connected to stirring auger 18. The top of stirring auger 18 is rotatably connected to the bottom of limiting plate 12. Limiting plate 12 is sleeved on the outer wall of rotating shaft 13 near coupling 11. Fixing ring 17 is threadedly fixedly connected to multiple connecting rods 19. Multiple movable sleeves 20 are all sleeved on the outer wall of connecting rods 19. Movable sleeves 20 are fixedly connected to auxiliary stirring rod 21. The bottom of multiple connecting rods 19 is rotatably connected to the top of fixed cylinder 8. Specifically, the rotary motor 6 serves as the power core of the entire system, transmitting power to the main rotating shaft 13 via the coupling 11. The rotation of the shaft 13 directly drives the agitator 18 at its bottom to rotate at high speed. As an axial flow stirring element, the agitator 18 generates a strong axial thrust during rotation, which can lift the material at the bottom of the reduction furnace 1 upward, forming a forced convection circulation in the central area. This is the main driving force for achieving macroscopic mixing. To ensure that the main rotating shaft 13 can maintain stable operation under high temperature, heavy load, and material resistance, and to avoid equipment damage caused by vibration or bending, this design adopts a multi-layered reinforcement structure. The limiting cylinder 14 is sleeved on the outside of the rotating shaft 13, providing radial support. The reinforcing fan blades 15, like spokes, rigidly connect the limiting cylinder 14 and the guide plate 16, forming a stable support frame. This effectively suppresses the radial sway of the rotating shaft 13 and disperses the stress generated during the stirring process throughout the frame structure, greatly improving the structural rigidity and operational reliability of the equipment. The guide plate 16 rotates synchronously with the main rotating shaft 13, thereby driving multiple connecting rods 19 connected by the fixing ring 17 to revolve. The movable sleeve 20 can rotate freely on the connecting rods 19. When the connecting rods 19 revolve, the movable sleeve 20 and the auxiliary stirring rod 21 on it will rotate around the axis of the connecting rod 19 under the action of material resistance. This makes the movement trajectory of the auxiliary stirring rod 21 extremely complex, covering the area near the furnace wall that the main stirring auger 18 cannot reach. This forms shearing, tumbling and dispersion of the material, effectively breaking the material stratification, eliminating the mixing "dead zone", and achieving fine mixing at the micro level.

[0018] The inner side of the limiting seat 2 is connected to the fixing cylinder 8, the inner side of the fixing cylinder 8 is connected to multiple mixing teeth 9, the inner side of each of the multiple mixing teeth 9 is connected to multiple mixing rods 10, one end of the reduction furnace 1 is connected to the control box 3, the outer wall of the reduction furnace 1 near the control box 3 is connected to the feed port 4, the top of the reduction furnace 1 is connected to the sealing plate 5, and the top of the sealing plate 5 is connected to the rotary motor 6. The fixed cylinder 8 is fixedly connected to the mixing toothed plate 9, and multiple mixing toothed plates 9 are fixedly connected to the mixing rod 10. The bottom of the preparation cylinder 7 is in contact with the top outer wall of the fixed cylinder 8. Specifically, below the mixing system, the inner wall of the fixed cylinder 8 is equipped with mixing blades 9 and mixing rods 10. These structures are static and do not rotate with the main shaft. When the material mixed by the main and auxiliary mixing systems flows through this area, it is repeatedly cut, diverted, merged and guided by these fixed blades and rods, further refining the mixing scale of the material and ensuring that the material achieves extremely high uniformity of composition and temperature before finally being discharged or entering the next reaction stage.

[0019] It should be noted that this utility model is a reduction furnace for nickel alloy preparation. In use, the operator adds the proportioned nickel oxide raw materials, reducing agent and other alloying elements into the preparation cylinder 7 inside the furnace through the feed port 4 on the side wall of the reduction furnace 1. After the feeding is completed, ensure that the sealing plate 5 at the top is in a sealed state to create an inert or reducing atmosphere for the subsequent high-temperature reduction reaction and prevent the material from oxidizing. Start the heating system of the reduction furnace through the control box 3 to heat the material in the furnace. When the temperature is close to or reaches the reaction temperature, start the rotary motor 6. The rotary motor 6 starts working, driving the rotating shaft 13 and the bottom stirring auger 18 to rotate at high speed via the coupling 11. The stirring auger 18 forcefully pushes the high-temperature material at the bottom of the preparation cylinder 7 upward along the axial direction. After reaching the top, the material diffuses outward and then sinks along the cylinder wall, forming a stable and powerful axial circulation that is upward in the center and downward around the edges. This process quickly breaks the static accumulation of the material, achieving preliminary mixing and temperature homogenization at the macroscopic level. While the rotating shaft 13 rotates, the connecting rod 19 begins to revolve through the stable structure formed by the limiting cylinder 14, the reinforcing fan blades 15, and the guide plate 16. The movable sleeve 20 and the auxiliary stirring rod 21 installed on the connecting rod 19 then perform circular motion in the upper middle region of the preparation cylinder 7. Under the action of the viscous resistance of the material, the auxiliary stirring rod 21 begins to rotate around the connecting rod 19. At this time, the auxiliary stirring rod 21 moves with a complex spatial curve trajectory, which strongly shears and tumbles the material near the cylinder wall, and entrains the material that may adhere to the wall or form a circulation into the mainstream, eliminating the mixing dead zone and realizing the fine and micro-mixing of the material. Through the combined action of primary and secondary stirring, the materials have become highly homogeneous. During the circulation process, these mixtures pass through the fixed cylinder 8 region below the preparation cylinder 7. In this region, the materials are repeatedly cut, diverted, and have their flow direction altered by the interlaced mixing teeth 9 and mixing rods 10 on the inner wall. This static mixing process acts like a "comb," performing a final "grooming" of the materials to ensure that any possible minor component segregation or temperature differences are completely eliminated, resulting in extremely high homogeneity.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A reduction furnace for nickel alloy preparation, comprising a reduction furnace (1), a limiting seat (2), and a preparation cylinder (7), characterized in that: The preparation cylinder (7) is equipped with a stirring auxiliary component inside; The stirring auxiliary assembly includes a coupling (11) disposed at the top inside the preparation cylinder (7). The output end of the coupling (11) is connected to a rotating shaft (13). A limiting disk (12) is sleeved on the outer wall of the rotating shaft (13) near the coupling (11). A limiting cylinder (14) is connected to the bottom of the rotating shaft (13). A reinforcing fan blade (15) is connected to the outer wall of the limiting cylinder (14). A guide disk (16) is connected to the end of the reinforcing fan blade (15) away from the limiting cylinder (14). A fixing ring (17) is connected to the top of the guide disk (16). Multiple stirring augers (18) are connected to the bottom of the limiting disk (12). Multiple connecting rods (19) are connected to the outer end of the bottom of the guide disk (16). Multiple movable sleeves (20) are sleeved on the outer walls of the multiple connecting rods (19). Auxiliary stirring rods (21) are connected to the outer walls of the multiple movable sleeves (20).

2. The reduction furnace for nickel alloy production according to claim 1, characterized in that: The inner side of the limiting seat (2) is connected to a fixing cylinder (8), the inner side of the fixing cylinder (8) is connected to a plurality of mixing teeth (9), the inner side of the plurality of mixing teeth (9) is connected to a plurality of mixing rods (10), one end of the reduction furnace (1) is connected to a control box (3), the outer wall of the reduction furnace (1) near the control box (3) is connected to a feed inlet (4), the top of the reduction furnace (1) is connected to a sealing plate (5), and the top of the sealing plate (5) is connected to a rotary motor (6).

3. The reduction furnace for nickel alloy production according to claim 1, characterized in that: The coupling (11) is connected to the rotating shaft (13) for transmission, the rotating shaft (13) is connected to the limiting cylinder (14) for rotation, and the limiting cylinder (14) is connected to the reinforced fan blade (15) for fixation.

4. A reduction furnace for nickel alloy preparation according to claim 1, characterized in that: The end of the reinforced fan blade (15) away from the limiting cylinder (14) is fixedly connected to the inner side of the guide plate (16), and the guide plate (16) is fixedly connected to the fixing ring (17).

5. The reduction furnace for nickel alloy production according to claim 1, characterized in that: The fixed ring (17) is rotatably connected to the stirring auger (18), the top of the stirring auger (18) is rotatably connected to the bottom of the limiting plate (12), the limiting plate (12) is sleeved on the outer wall of the rotating shaft (13) near the end of the coupling (11), and the fixed ring (17) is threadedly fixedly connected to a plurality of the connecting rods (19).

6. The reduction furnace for nickel alloy production according to claim 1, characterized in that: Multiple movable sleeves (20) are fitted onto the outer wall of the connecting rod (19). The movable sleeves (20) are fixedly connected to the auxiliary stirring rod (21). The bottom of the multiple connecting rods (19) is rotatably connected to the top of the fixed cylinder (8).

7. The reduction furnace for nickel alloy production according to claim 2, characterized in that: The fixed cylinder (8) is fixedly connected to the mixing toothed plate (9), and the plurality of mixing toothed plates (9) are fixedly connected to the mixing rod (10). The bottom of the preparation cylinder (7) is in contact with the top outer wall of the fixed cylinder (8).

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