Low-grade bauxite sedimentation device

Abstract

The utility model relates to the technical field of aluminum oxide production, in particular to a low-grade bauxite settling device which comprises a settling tank and an aeration mechanism. The other end of the settling tank is provided with a drainage pipe, and the bottom of the settling tank is provided with a slag discharge port. A main pipeline of the aeration mechanism is annularly arranged at the bottom of the settling tank, one end is connected with an air compressor, the other end is provided with an exhaust valve, and the main pipeline is provided with a plurality of branch pipelines with one-way air valves. The mechanism uniformly introduces air to the bottom of the settling tank through the main and branch pipelines, effectively stirs sludge and impurities at the bottom, destroys the agglomeration structure and enhances the flowability. And when the deslagging port is opened, loose impurities are smoothly discharged by gravity and airflow pushing, so that the blockage possibility is reduced, and efficient and stable deslagging is guaranteed. And the annular main pipeline can uniformly send air to all positions of the tank bottom, so that the settling and deslagging effects are more uniform and consistent, and the stability and consistency of the treatment effect are improved.

Description

Technical Field

[0001] This utility model relates to the field of alumina production technology, and more specifically, to a settling device for low-grade bauxite. Background Technology

[0002] Low-grade bauxite refers to bauxite with a low aluminum-to-silicon ratio (A / S), typically below 5. Due to its low grade and difficulty in processing, low-grade bauxite has a low utilization rate in alumina production. During alumina production, insoluble impurities need to be separated from the mixed solution. The mixed solution made from low-grade bauxite contains many impurities, resulting in a large amount of insoluble impurities during the settling process. Currently, most existing settling tanks use scraper mechanisms to clean the sludge and impurities accumulated at the bottom. However, given the large amount of sludge and impurities generated during the settling process of low-grade bauxite, the scraper mechanism bears a high workload during operation. This high-intensity working condition makes the scraper mechanism prone to overload and even jamming, thus affecting the normal operation of the entire production process. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a low-grade bauxite settling device that can clean mixed solutions with high silt and impurity content, offering high reliability and low maintenance frequency.

[0004] A low-grade bauxite settling device according to an embodiment of the present invention includes:

[0005] A settling tank, wherein a water inlet pipe is provided at one end of the settling tank and a drain pipe is provided at the other end of the settling tank; and a slag discharge port is provided at the bottom of the settling tank.

[0006] An aeration mechanism is provided, which includes a main pipe arranged in a ring at the bottom of the settling tank. One end of the main pipe is connected to an air compressor, and the other end of the main pipe is equipped with an exhaust valve. Multiple branch pipes are provided on the main pipe, and one-way air valves are provided on the branch pipes.

[0007] According to some embodiments of the present invention, a partition is provided inside the settling tank, which divides the settling tank into a first cavity and a second cavity. The aeration mechanism is disposed in the first cavity, and the slag discharge port is disposed in the second cavity.

[0008] According to some embodiments of the present invention, the inner peripheral wall of the upper end of the settling tank is provided with an overflow trough, and the drain pipe is connected to the overflow trough.

[0009] According to some embodiments of the present invention, an overflow plate is provided on the side of the overflow trough away from the peripheral wall of the settling trough.

[0010] According to some embodiments of the present invention, the overflow plate is provided with a serrated structure.

[0011] According to some embodiments of the present invention, the axes of the plurality of branch pipes are parallel to each other, and the two ends of the branch pipes are respectively connected to the main pipe.

[0012] According to some embodiments of this utility model, a material collection hopper is provided at the slag discharge port.

[0013] According to some embodiments of the present invention, the settling tank is provided with a screw feeder at the collection hopper.

[0014] A low-grade bauxite settling device according to an embodiment of the present invention has at least the following beneficial effects:

[0015] According to the present invention, the low-grade bauxite settling device includes a settling tank and an aeration mechanism. One end of the settling tank is equipped with a water inlet pipe, and the other end with a drain pipe. A slag discharge port is located at the bottom of the settling tank. The aeration mechanism has a main pipe arranged in a ring at the bottom of the settling tank. One end of the main pipe is connected to an air compressor, and the other end is equipped with an exhaust valve. Multiple branch pipes are installed on the main pipe, and one-way air valves are installed on each branch pipe. The aeration mechanism evenly introduces air into the bottom of the settling tank through the main and branch pipes, effectively agitating the silt and impurities at the bottom, breaking down the agglomerated structure of the impurities. The airflow generated by the aeration continuously disturbs the silt and impurities at the bottom, keeping them loose and increasing their fluidity. When the slag discharge port is opened, these loose silt and impurities can be smoothly discharged from the slag discharge port by their own gravity and the pushing force of the airflow, greatly reducing the possibility of blockage during the slag discharge process and ensuring efficient and stable slag discharge.

[0016] According to the present invention, this device does not include a scraper mechanism, thus reducing complex mechanical moving parts. This not only reduces the overall structural complexity of the equipment, but also reduces the maintenance workload and downtime caused by scraper mechanism failure, thereby lowering maintenance costs and improving the reliability and stability of equipment operation.

[0017] According to the present invention, the main pipeline arranged in a ring can evenly deliver air to all positions at the bottom of the settling tank, ensuring that the sludge and impurities at the bottom of the entire settling tank are subjected to the same degree of aeration disturbance, avoiding the problem of excessive accumulation of impurities or insufficient treatment in local areas, making the settling and slag discharge effect more uniform and consistent throughout the settling tank, and improving the stability and consistency of the treatment effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the aeration mechanism of this utility model.

[0021] In the picture:

[0022] 100-Settling tank, 101-First cavity, 102-Second cavity, 110-Water inlet pipe, 120-Drain pipe, 130-Slag discharge port, 131-Collection hopper, 140-Baffle plate, 150-Overflow trough, 151-Overflow plate, 160-Screw feeder;

[0023] 200 - Aeration mechanism, 210 - Main pipe, 220 - Exhaust valve, 230 - Branch pipe, 231 - One-way valve. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] Reference Figures 1 to 3As shown, this utility model discloses a low-grade bauxite settling device, which includes a settling tank 100 and an aeration mechanism 200. One end of the settling tank 100 is provided with a water inlet pipe 110, and the other end is provided with a drain pipe 120; a slag discharge port 130 is provided at the bottom of the settling tank 100; the aeration mechanism 200 is provided with a main pipe 210, which is arranged in a ring at the bottom of the settling tank 100. One end of the main pipe 210 is connected to an air compressor, and the other end is provided with an exhaust valve 220; multiple branch pipes 230 are provided on the main pipe 210, and one-way air valves 231 are provided on the branch pipes 230. Specifically, in this embodiment, the mixed solution formed by the treatment of low-grade bauxite flows into the settling tank 100 through the water inlet pipe 110 at one end of the settling tank 100. The clarified liquid is discharged through drain pipe 120. After a period of treatment, once the sludge at the bottom of the settling tank 100 has accumulated to a certain thickness, the aeration mechanism 200 starts working, and the air compressor delivers air to the main pipe 210. The main pipe 210 is arranged in a ring around the bottom of the settling tank 100, ensuring that air is evenly distributed to all areas at the bottom of the settling tank 100. The air flows along the main pipe 210 and then enters each branch pipe 230. One-way valves 231 installed on the branch pipes 230 only allow air to flow from the main pipe 210 to the bottom of the settling tank 100, preventing backflow. After the air is ejected from the branch pipes 230, it forms an airflow in the sludge impurity layer at the bottom of the settling tank 100, agitating these impurities. At the same time, the sludge discharge port 130 at the bottom of the settling tank 100 is activated to discharge the sludge impurities from the settling tank 100. In this embodiment, the aeration mechanism 200 evenly introduces air into the bottom of the settling tank 100 through the main pipe 210 and branch pipes 230, effectively agitating the sludge and impurities at the bottom, breaking down the agglomerated structure of the impurities, and allowing the loose sludge and impurities to be smoothly discharged from the slag discharge port 130 by their own gravity and the push of the airflow. This greatly reduces the possibility of blockage during the slag discharge process and ensures that the slag discharge work is efficient and stable. In this embodiment, the device does not have a scraper mechanism, reducing complex mechanical moving parts. This not only reduces the overall structural complexity of the equipment, but also reduces the equipment maintenance workload and downtime caused by scraper mechanism failure. In this embodiment, the ring-shaped main pipe 210 can evenly deliver air to all positions at the bottom of the settling tank 100, ensuring that the sludge and impurities at the bottom of the entire settling tank 100 are subjected to the same degree of aeration disturbance, avoiding the problem of excessive accumulation of impurities or insufficient treatment in local areas. This makes the settling and slag discharge effect more uniform and consistent throughout the settling tank 100, improving the stability and consistency of the treatment effect.

[0029] In some embodiments of this utility model, a partition 140 is provided inside the settling tank 100, dividing the settling tank 100 into a first cavity 101 and a second cavity 102. An aeration mechanism 200 is disposed in the first cavity 101; a sludge discharge port 130 is disposed in the second cavity 102. Specifically, in this embodiment, an aeration mechanism 200 is provided in the first cavity 101. When the sludge at the bottom of the settling tank 100 is detected to have accumulated to a certain thickness, the aeration mechanism 200 starts to work. An air compressor delivers air to the main pipe 210, which is arranged in a ring at the bottom of the first cavity 101, and the air is evenly distributed in this area. The air flows into the branch pipe 230 through the main pipe 210. A one-way valve 231 ensures that the air can only flow from the main pipe 210 to the bottom of the first cavity 101. The sprayed air forms an airflow on the sludge impurity layer at the bottom of the first cavity 101, agitating the impurities and forming a turbid liquid. The turbid liquid enters the second chamber 102 through the partition 140, settles under gravity, and is then discharged through the slag discharge port 130. In this embodiment, the partition 140 divides the settling tank 100 into two relatively independent chambers, avoiding disturbance of the area above the slag discharge port 130 by the aeration mechanism 200.

[0030] In some embodiments of this invention, an overflow trough 150 is provided on the inner peripheral wall of the upper end of the settling tank 100, and a drain pipe 120 is connected to the overflow trough 150. Specifically, in this embodiment, during the settling process, the relatively clear solution after settling overflows into the overflow trough 150. By providing the overflow trough 150, the flow state of the solution in the settling tank 100 can be effectively regulated, avoiding drastic fluctuations caused by factors such as changes in liquid level from affecting the upper liquid. Through buffering and blocking, the solution flows into the drain pipe 120 at a relatively stable speed, which helps maintain the stability of the settling process.

[0031] In some embodiments of this utility model, an overflow plate 151 is provided on the side of the overflow trough 150 away from the periphery of the settling tank 100. In this embodiment, the height of the overflow plate 151 is lower than the upper edge of the overflow trough 150.

[0032] In some embodiments of this utility model, the overflow plate 151 is provided with a serrated structure. Specifically, in this embodiment, the upper layer of clarified liquid in the settling tank 100 can slowly enter the overflow tank 150 through the serrated overflow plate 151. It also has a certain ability to intercept floating impurities.

[0033] In some embodiments of this invention, the axes of multiple branch pipes 230 are parallel to each other, and both ends of the branch pipes 230 are connected to the main pipe 210. Specifically, in this embodiment, through the design of this structure, when a branch pipe 230 experiences partial blockage, since both ends of the other branch pipes 230 are connected to the main pipe 210, gas can continue to flow through the other branch pipes 230, maintaining gas delivery. Simultaneously, the gas can apply reverse pressure from the blocked area, assisting in clearing the blockage, improving the overall pipeline system's tolerance to partial blockages, and reducing the risk of the entire system failing due to blockage in a single pipe.

[0034] In some embodiments of this utility model, a collecting hopper 131 is provided at the slag discharge port 130. Specifically, in this embodiment, after settling, the impurities at the bottom are discharged through the slag discharge port 130. The collecting hopper 131 is located at the slag discharge port 130. When the slag discharge port 130 is open, the waste slag at the bottom of the settling tank 100 falls downward into the collecting hopper 131 under the action of gravity. The collecting hopper 131 usually has a large opening area, which can effectively receive the waste slag discharged from the slag discharge port 130, ensuring that the waste slag smoothly enters the collecting hopper 131. Due to the funnel-shaped structure of the collecting hopper 131, which is wider at the top and narrower at the bottom, the waste slag entering the collecting hopper 131 will gradually converge downward along the hopper wall and be concentrated at the lower outlet of the collecting hopper 131, which facilitates the subsequent unified collection and treatment of the waste slag.

[0035] In some embodiments of this utility model, a screw feeder 160 is provided at the collection hopper 131 in the settling tank 100. Specifically, in this embodiment, by providing the screw feeder 160, a large amount of sludge and impurities can be processed, preventing the sludge and impurities from clogging the slag discharge port 130.

[0036] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A settling device for low-grade bauxite, characterized in that, include: A settling tank (100) is provided with an inlet pipe (110) at one end and a drain pipe (120) at the other end; a slag discharge port (130) is provided at the bottom of the settling tank (100). An aeration mechanism (200) is provided with a main pipe (210), which is arranged in a ring at the bottom of the settling tank (100). One end of the main pipe (210) is connected to an air compressor, and the other end of the main pipe (210) is provided with an exhaust valve (220). Multiple branch pipes (230) are provided on the main pipe (210), and one-way air valves (231) are provided on the branch pipes (230).

2. The low-grade bauxite settling device according to claim 1, characterized in that, The settling tank (100) is provided with a partition (140), which divides the settling tank (100) into a first cavity (101) and a second cavity (102). The aeration mechanism (200) is provided in the first cavity (101), and the slag discharge port (130) is provided in the second cavity (102).

3. The low-grade bauxite settling device according to claim 1, characterized in that, An overflow trough (150) is provided on the inner peripheral wall of the upper end of the settling trough (100), and the drain pipe (120) is connected to the overflow trough (150).

4. The low-grade bauxite settling device according to claim 3, characterized in that, An overflow plate (151) is provided on the side of the overflow trough (150) away from the periphery of the settling trough (100).

5. The low-grade bauxite settling device according to claim 4, characterized in that, The overflow plate (151) is provided with a sawtooth structure.

6. The low-grade bauxite settling device according to claim 1, characterized in that, The axes of the multiple branch pipes (230) are parallel to each other, and the two ends of the branch pipes (230) are respectively connected to the main pipe (210).

7. The low-grade bauxite settling device according to claim 1, characterized in that, A hopper (131) is provided at the slag discharge port (130).

8. The low-grade bauxite settling device according to claim 7, characterized in that, The settling tank (100) is equipped with a screw feeder (160) at the collection hopper (131).

Images