System for heat treatment of aluminum electrolysis carbon residue

Abstract

The utility model relates to the field of aluminum electrolysis carbon residue, especially aluminum electrolysis carbon residue heat treatment system, including rotary kiln and scattering device, rotary kiln rotation limit connection is in the upper portion of support top, and the right side of rotary kiln is rotationally connected with feeding device through feed slot, and its left side is rotationally connected with scattering device through mounting groove, and scattering device is composed of fixed axle, scattering blade and connecting rod, and spiral blade is fixedly installed in the inner wall of rotary kiln, and a plurality of scattering blades between the pitch of spiral blade are fixedly installed on the surface of fixed axle located in the interior of rotary kiln, and the surface of fixed axle is fixedly connected with wall scraping strip that contacts with the inner wall of rotary kiln through the right side connecting rod of scattering blade, in the utility model, through setting spiral blade and scattering device in rotary kiln, make carbon residue not stick in the inner wall of rotary kiln when carrying out heat treatment in rotary kiln, to heat the carbon residue evenly at the same time, and further improve the heat treatment effect of carbon residue.

Description

Technical Field

[0001] This utility model relates to the field of aluminum electrolysis carbon slag technology, and in particular to an aluminum electrolysis carbon slag heat treatment system. Background Technology

[0002] Carbon slag is a solid waste generated during aluminum electrolysis. It consists of undissolved anode aggregate and electrolyte, with carbon and electrolyte as its main components.

[0003] In existing carbon slag treatment processes, the carbon slag is usually crushed first and then fed into a rotary kiln for heat treatment via a feeding device. By precisely controlling the oxygen supply and temperature, the organic matter in the carbon slag is fully combusted to generate gaseous products. The remaining residue is then treated to solidify it into harmless substances for recycling. However, during the heat treatment process, the electrolytes contained in the carbon slag begin to soften and exhibit viscous fluid characteristics, causing the carbon slag to adhere to the inner wall of the rotary kiln. This results in the carbon slag not being heated evenly, thereby reducing the heat treatment effect of the carbon slag. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an aluminum electrolysis carbon slag heat treatment system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The aluminum electrolysis carbon slag heat treatment system includes a rotary kiln and a dispersing device. The rotary kiln rotation limiter is connected to the top of the support. The right side of the rotary kiln is rotatably connected to the feeding device through the feeding chute, and the left side is rotatably connected to the dispersing device through the mounting groove. The dispersing device consists of a fixed shaft, dispersing blades and connecting rods, and spiral blades are fixedly installed on the inner wall of the rotary kiln.

[0006] Multiple disintegrating blades located between the pitches of the spiral blades are spirally fixedly installed on the surface of the fixed shaft inside the rotary kiln, and a wall scraper that contacts the inner wall of the rotary kiln is fixedly connected to the surface of the fixed shaft through the connecting rod on the right side of the disintegrating blades.

[0007] Furthermore, in a preferred configuration, the pitch between the spiral blades inside the rotary kiln gradually increases from left to right, and the spacing between the dispersing devices between the pitches also increases sequentially.

[0008] In addition, the preferred structure is that the feeding device consists of a feeding hopper, crushing blades and spiral conveyor blades, and a rotating motor.

[0009] In addition, a preferred structure is that an outer jacket layer is provided on the outer side of the spiral conveying blades of the feeding device, and air pipes for circulating hot air are provided on the upper and lower ends of the left and right sides of the surface of the outer jacket layer.

[0010] Furthermore, a preferred structure includes a dispersing device located inside the rotary kiln and an anti-sticking material applied to the inside of the rotary kiln.

[0011] In addition, a preferred structure is that the rotary kiln is rotatably connected to a drive motor on the front side of the top of the support via a belt.

[0012] The beneficial effects of this utility model are as follows: by setting spiral blades and a dispersing device in the rotary kiln, the carbon slag will not stick to the inner wall of the rotary kiln during heat treatment, thereby improving the heat treatment effect of the carbon slag while ensuring uniform heating. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the rotary kiln proposed in this utility model; Figure 2 This is an exploded structural diagram of the feeding device proposed in this utility model; Figure 3 This is a schematic cross-sectional view of the rotary kiln proposed in this utility model; Figure 4 This is a schematic diagram of the overall structure of the dispersing device proposed in this utility model.

[0014] In the diagram: 1. Rotary kiln; 11. Support; 12. Feed chute; 13. Mounting chute; 14. Feeding device; 15. Outer jacket layer; 16. Gas pipe; 17. Drive motor; 18. Spiral blade; 2. Dispersing device; 21. Fixed shaft; 22. Dispersing blade; 23. Connecting rod; 24. Scraper bar. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Reference Figure 1 The aluminum electrolysis carbon slag heat treatment system includes a rotary kiln 1 and a dispersing device 2. The rotary kiln 1 is rotatably limited and connected to the top of the support 11. The right side of the rotary kiln 1 is rotatably connected to the feeding device 14 through the feeding chute 12, and the left side is rotatably connected to the dispersing device 2 through the mounting groove 13. The rotary kiln 1 is also rotatably connected to the drive motor 17 at the front of the top of the support 11 via a belt. Reference Figure 2 The feeding device 14 consists of a feeding hopper, crushing blades, spiral conveying blades, and a rotating motor. An outer jacket layer 15 is provided on the outer side of the spiral conveying blades on the feeding device 14. Air pipes 16 for circulating hot air are provided on the upper and lower ends of the left and right sides of the surface of the outer jacket layer 15.

[0017] Reference Figure 3-4The inner wall of the rotary kiln 1 is fixedly installed with spiral blades 18. Its dispersing device 2 consists of a fixed shaft 21, dispersing blades 22 and connecting rods 23. Multiple dispersing blades 22 located between the pitches of the spiral blades 18 are spirally fixedly installed on the surface of the fixed shaft 21 inside the rotary kiln 1.

[0018] The surface of the fixed shaft 21 is fixedly connected to the wall scraper 24, which is in contact with the inner wall of the rotary kiln 1, via the connecting rod 23 on the right side of the dispersing blade 22. The dispersing device 2, the spiral blade 18, and the interior of the rotary kiln 1 are coated with an anti-adhesion material (nano-ceramic coating). The pitch between the spiral blades 18 inside the rotary kiln 1 gradually increases from left to right, and the interval between the dispersing devices 2 between their pitches also increases synchronously.

[0019] In this embodiment, when heat-treating the aluminum electrolysis carbon slag, the gas supply pipes 16 on the left and right sides and the upper and lower ends of the outer jacket layer 15 are connected to the gas boiler. Then, the carbon is put into the feed hopper of the feeding device 14 through the mechanical gripper. Then, the rotating motor is started, and the crushing blades are driven to rotate through the pulley and belt, thereby crushing the larger part of the carbon slag.

[0020] The crushed carbon slag enters the spiral conveyor blades below. Driven by the rotating motor, the crushed carbon slag is evenly conveyed into the rotary kiln 1 through the feed trough 12. Hot steam is circulated through the steam boiler and the gas supply pipe 16 to the gap between the outer jacket layer 15 and the outer side of the spiral conveyor blades. This can eliminate the moisture in the carbon slag, thereby preventing the carbon slag from clogging the pipes on the outer side of the spiral conveyor blades and sticking to the inner wall of the rotary kiln 1.

[0021] When the crushed carbon slag enters the rotary kiln 1, the drive motor 17 on the front side of the top of the support 11 is started. Then, the rotary kiln 1 is driven to rotate above the support 11 by the belt, thereby causing the carbon slag inside to be continuously picked up and scattered. At this time, fuel and hot gas are injected from the left side of the rotary kiln 1 to form a high-temperature flame and hot flue gas. Then, the high-temperature flame and hot flue gas move to the right side to heat treat the carbon slag.

[0022] At this time, the carbon slag will move from the right side to the left side of the rotary kiln 1 through the spiral blades 18, and come into contact with the high-temperature flame and hot flue gas moving to the right. Subsequently, the organic matter in the carbon slag will be fully burned to generate gaseous products, while the remaining residue will be solidified into harmless substances and finally discharged through the discharge port on the left side of the rotary kiln 1 for recycling. In addition, the pitch between the spiral blades 18 gradually increases from left to right, so that the carbon slag gradually loosens during the conveying process, reducing the long-term contact with the inner wall of the rotary kiln 1, thereby preventing the softened carbon slag from sticking to the inner wall of the rotary kiln 1.

[0023] While the rotary kiln 1 is rotating, the dispersing device 2 is fixed on the support 11, so the fixed shaft 21 on the dispersing device 2 will not rotate in the mounting groove 13 due to the rotation of the rotary kiln 1. When the carbon slag is tumbled and heat-treated in the rotary kiln 1 and then softened, the dispersing blades 22 on the fixed shaft 21 will re-crush and disperse the softened carbon slag, so that it will be tumbled and heat-treated again as the rotary kiln 1 rotates. The scraper strips 24 connected by the connecting rod 23 can separate the softened carbon slag that is stuck to the inner wall of the rotary kiln 1. In addition, the risk of the softened carbon slag sticking to the inner wall of the rotary kiln 1 can be reduced by the anti-sticking material, so as to improve the heat treatment effect of the carbon slag while heating it evenly.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An aluminum electrolysis carbon slag heat treatment system, comprising a rotary kiln (1) and a dispersing device (2), characterized in that, The rotary kiln (1) is rotatably limited and connected to the top of the support (11). The right side of the rotary kiln (1) is rotatably connected to the feeding device (14) through the feeding chute (12), and the left side is rotatably connected to the dispersing device (2) through the mounting groove. The dispersing device (2) consists of a fixed shaft (21), a dispersing blade (22) and a connecting rod (23). The inner wall of the rotary kiln (1) is fixedly installed with spiral blades (18). A plurality of disintegrating blades (22) located between the pitches of the spiral blades (18) are spirally fixedly installed on the surface of the fixed shaft (21) inside the rotary kiln (1), and a scraping strip (24) that contacts the inner wall of the rotary kiln (1) is fixedly connected to the surface of the fixed shaft (21) through the connecting rod (23) on the right side of the disintegrating blades (22).

2. The aluminum electrolysis carbon slag heat treatment system according to claim 1, characterized in that, The pitch between the spiral blades (18) inside the rotary kiln (1) gradually increases from left to right, and the interval between the dispersing devices (2) between their pitches also increases synchronously.

3. The aluminum electrolysis carbon slag heat treatment system according to claim 1, characterized in that, The feeding device (14) consists of a feeding hopper, crushing blades and spiral conveying blades, and a rotating motor.

4. The aluminum electrolysis carbon slag heat treatment system according to claim 3, characterized in that, The outer side of the spiral conveying blades of the feeding device (14) is provided with an outer jacket layer (15), and the upper and lower ends of the left and right sides of the outer jacket layer (15) are provided with air pipes (16) for circulating hot air.

5. The aluminum electrolysis carbon slag heat treatment system according to claim 1, characterized in that, The dispersing device (2) located inside the rotary kiln (1) and the interior of the rotary kiln (1) are coated with an anti-adhesion material.

6. The aluminum electrolysis carbon slag heat treatment system according to claim 1, characterized in that, The rotary kiln (1) is rotatably connected to the drive motor (17) at the front of the top of the support (11) via a belt.

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