Cyclone set capable of meeting different grading requirements

Abstract

The utility model discloses a cyclone set capable of meeting different grading requirements, and particularly relates to the technical field of aluminum oxide production and mineral separation, which comprises a distributor, an underflow pool body and an overflow pool body, a pressure gauge is mounted on the distributor, a cyclone set feeding pipe is arranged at the bottom of the distributor, and a cyclone set discharging pipe is arranged at the bottom of the overflow pool body. Two sides of the distributor are respectively connected with an A-type cyclone feeding pipe and a B-type cyclone feeding pipe; a first cyclone feeding valve is mounted on the first cyclone feeding pipe, the first cyclone feeding pipe is connected with a first cyclone body, a first desilting nozzle is arranged at the bottom of the first cyclone body, a first central pipe is mounted at the top end of the first cyclone body, and the first central pipe is connected with a first overflow pipe. According to the utility model, by arranging the cyclones with different taper angles and matched components, differential adjustment of classification efficiency and rapid switching production can be realized, the problems that the fixed parameters of the cyclones cannot adapt to variable ore pulp preparation requirements and the replacement of the desilting nozzle affects production are solved, and a foundation is laid for high yield and high quality of an ore grinding system.

Description

Technical Field

[0001] This utility model relates to the field of alumina production and mineral processing technology, and more specifically, to a hydrocyclone assembly that can meet different grading requirements. Background Technology

[0002] Raw ore slurry preparation is a crucial step in alumina production. Its main task is to use bauxite and alkaline solution as primary raw materials. The key quality indicators of the finished slurry are solids content and fineness. Controlling these two indicators prepares the slurry for the subsequent leaching reaction. Raw ore slurry preparation often employs a closed-circuit grinding process consisting of a mill and a hydrocyclone. The hydrocyclone is responsible for particle size control and classification. Due to significant differences in the leaching reactivity and grindability of different bauxite ores, the required fineness indicators also vary considerably during raw ore slurry preparation. Because of the unstable supply of ore, the types of ore used in production change frequently. Different ore types, different grindability, and different fineness indicators require corresponding adjustments to the grinding production conditions to meet the requirements.

[0003] The classification effect of hydrocyclones has a crucial impact on controlling grinding fineness. The parameters of the hydrocyclone itself that significantly affect classification efficiency include the diameter and height of the cylindrical body, the cone angle, the specifications of the overflow center pipe, and the specifications of the underflow nozzle. The inherent specifications and performance parameters of the hydrocyclone, such as the cylindrical body and cone angle, are fixed and cannot be changed after installation and commissioning. Replacing or adjusting the underflow nozzle requires entering the underflow basin, therefore it can only be done when the grinding system is completely shut down.

[0004] Different types of ore, varying grindability, and fineness requirements necessitate different diameters, heights, and cone angles of the hydrocyclone cylinder, as well as specifications for the overflow center pipe and underflow nozzle, to achieve optimal quality and most economical production. Fixed diameters, heights, and cone angles of the hydrocyclone cylinder cannot adapt to the diverse needs of bauxite slurry preparation, limiting the optimization of grinding fineness. Furthermore, replacing or adjusting the underflow nozzle requires entry into the underflow basin, necessitating a complete shutdown of the grinding system and forcing production interruptions. This threatens the quality of the finished bauxite slurry, impacts equipment utilization, and affects output and operating costs.

[0005] Therefore, a hydrocyclone assembly that can meet different classification requirements is proposed. Utility Model Content

[0006] To overcome the aforementioned deficiencies of the prior art, this utility model provides a hydrocyclone assembly that can meet different grading requirements. It solves the problem that the fixed diameter, height, and cone angle of the cylindrical body of the hydrocyclone cannot adapt to the changing needs of bauxite slurry preparation, which limits the optimization of grinding fineness. Furthermore, the replacement and adjustment of the underwash nozzle must be carried out when the grinding system is completely shut down, which forces the interruption of production and threatens the quality of the raw ore slurry, affecting equipment utilization, output, and production operating costs.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a hydrocyclone group that can meet different grading requirements, including a distributor, a bottom flow pool body and an overflow pool body, a pressure gauge is installed on the distributor, a hydrocyclone group feed pipe is provided at the bottom of the distributor, and a type A hydrocyclone feed pipe and a type B hydrocyclone feed pipe are respectively connected to both sides of the distributor.

[0008] The feed pipe of the type A cyclone is equipped with a feed valve for type A cyclone, the feed pipe of type A cyclone is connected to the body of type A cyclone, the bottom of the body of type A cyclone is provided with a sand discharge nozzle, the top of the body of type A cyclone is equipped with a central tube for type A cyclone, and the central tube for type A cyclone is connected to an overflow pipe for type A cyclone.

[0009] The feed pipe of the type B cyclone is equipped with a type B cyclone feed valve, the feed pipe of the type B cyclone is connected to the type B cyclone body, the bottom of the type B cyclone body is provided with a type B sand discharge nozzle, the top of the type B cyclone body is equipped with a type B central tube, and the type B central tube is connected to a type B overflow pipe;

[0010] The settling nozzles A and B are connected to the underflow tank body, and the underflow tank body is provided with an underflow tank discharge pipe at the bottom end.

[0011] Overflow pipe A and overflow pipe B are connected to the overflow pool body, and an overflow pool discharge pipe is provided at the bottom of the overflow pool body.

[0012] Preferably, the type A vortex body and the type B vortex body are configured as two different types of vortices with different cone angles.

[0013] Preferably, the A central tube and the B central tube have different specifications.

[0014] Preferably, the specifications of the A-type and B-type sand sinkers are different.

[0015] Preferably, the bottom of the distributor is connected to the feed pipe of the hydrocyclone assembly via a flange, and a pressure gauge is installed on the top of the distributor to monitor and display the pressure inside the distributor.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] 1. By setting up two types of cone-angle hydrocyclones, A and B, the decomposition efficiency can be adjusted to achieve maximum differentiation, which can better meet the different needs of different ores for classification efficiency, and lay the foundation for high-yield and high-quality grinding systems.

[0018] 2. By assembling two sets of hydrocyclones (A and B) in the hydrocyclone assembly, production can be quickly switched by opening and closing the hydrocyclone feed valve, thus solving the problem of production disruption caused by replacing the sand-retaining nozzle during mill shutdown. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] The attached diagram is labeled as follows: 1. Distributor; 2. Hydrocyclone group feed pipe; 3. Pressure gauge; 4. Type A hydrocyclone feed valve; 5. Type A hydrocyclone body; 6. Type A overflow pipe; 7. Type A center pipe; 8. Type A settling nozzle; 9. Overflow tank body; 10. Underflow tank body; 11. Type B hydrocyclone feed valve; 12. Type B hydrocyclone body; 13. Type B overflow pipe; 14. Type B center pipe; 15. Type B settling nozzle; 16. Overflow tank discharge pipe; 17. Underflow tank discharge pipe; 18. Type A hydrocyclone feed pipe; 19. Type B hydrocyclone feed pipe. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] As attached Figure 1 The hydrocyclone assembly shown can meet different grading requirements, including a distributor 1, a bottom flow tank body 10 and an overflow tank body 9. A pressure gauge 3 is installed on the distributor 1, and a hydrocyclone assembly feed pipe 2 is provided at the bottom of the distributor 1. Type A hydrocyclone feed pipe 18 and Type B hydrocyclone feed pipe 19 are respectively connected to the two sides of the distributor 1.

[0023] The A-type cyclone feed pipe 18 is equipped with an A-type cyclone feed valve 4. The A-type cyclone feed pipe 18 is connected to an A-type cyclone body 5. The bottom of the A-type cyclone body 5 is provided with an A-type sand discharge nozzle 8. The top of the A-type cyclone body 5 is equipped with an A-type central pipe 7. The A-type central pipe 7 is connected to an A-type overflow pipe 6.

[0024] A type B cyclone feed valve 11 is installed on the type B cyclone feed pipe 19. The type B cyclone feed pipe 19 is connected to a type B cyclone body 12. A type B sand discharge nozzle 15 is provided at the bottom of the type B cyclone body 12. A type B central pipe 14 is installed at the top of the type B cyclone body 12. The type B central pipe 14 is connected to a type B overflow pipe 13.

[0025] The settling nozzle 8 and settling nozzle 15 are connected inside the underflow tank body 10, and the underflow tank body 10 is provided with an underflow tank discharge pipe 17 at the bottom end.

[0026] Overflow pipe 6 (A) and overflow pipe 13 (B) are connected inside the overflow tank body 9, and an overflow tank discharge pipe 16 is provided at the bottom of the overflow tank body 9.

[0027] In practice, the slurry enters the distributor 1 through the hydrocyclone group feed pipe 2, and the pressure gauge 3 on the distributor 1 monitors the internal pressure in real time. The distributor 1 divides the slurry into the type A hydrocyclone feed pipe 18 and the type B hydrocyclone feed pipe 19. Type A hydrocyclone feed valve 4 and type B hydrocyclone feed valve 11 are installed on the type A and type B hydrocyclone feed pipes, respectively. By controlling the opening and closing state of the valves, the type of hydrocyclone the slurry enters is determined.

[0028] The slurry entering the Type A cyclone separator 5 is subjected to centrifugal force under the influence of cyclone flow. Coarse particles move towards the wall of the separator due to centrifugal force and are discharged downwards along the cone from the Type A settling nozzle 8, entering the underflow tank 10. Fine particles and some liquid enter the Type A overflow pipe 6 through the Type A central pipe 7 and flow into the overflow tank 9. Similarly, the Type B cyclone separator 12 performs similar classification treatment on the incoming slurry. Coarse particles discharged from the Type B settling nozzle 15 enter the underflow tank, while fine particles and liquid discharged from the Type B overflow pipe 13 enter the overflow tank 9.

[0029] Coarse particles collected in the underflow tank body 10 are discharged from the underflow tank outlet pipe 17; fine particles and liquid collected in the overflow tank body 9 are discharged from the overflow tank outlet pipe 16. By selecting different specifications of type A and type B hydrocyclones, such as different cone angles, central tube specifications, and sand settling nozzle specifications, and by adjusting the feed valve, the differentiated requirements of different ores for classification efficiency and fineness can be met.

[0030] The type A vortex body 5 and the type B vortex body 12 are configured as two different types of vortexes with different cone angles.

[0031] The specifications of the center tube 7 (A) and the center tube 14 (B) are different.

[0032] The specifications of the sinker cap 8 and sinker cap 15 are different.

[0033] The bottom of the distributor 1 is connected to the feed pipe 2 of the hydrocyclone group via a flange, and the top of the distributor 1 is equipped with a pressure gauge 3 for monitoring and displaying the pressure inside the distributor 1.

[0034] Specifically, since the cone angle of a hydrocyclone is related to its classification efficiency, a smaller cone angle results in higher classification efficiency than a larger cone angle. For hydrocyclones requiring finer overflow solid particle sizes, a smaller cone angle hydrocyclone is more effective in meeting the fineness requirements, while a larger cone angle hydrocyclone is more effective in meeting the fineness requirements and increasing output. Typically, all hydrocyclones in a hydrocyclone group have the same cone angle. This hydrocyclone group has a total of 6 sub-cyclones, including 3 large cone angle sub-cyclones and 3 small cone angle sub-cyclones. The ratio of the diameter of the sedimentation nozzle to the diameter of the overflow center pipe in a hydrocyclone is called the cone ratio. The larger the cone ratio, the larger the return sand ratio and the finer the overflow solid particles. The smaller the cone ratio, the smaller the return sand ratio and the coarser the overflow solid particles. This hydrocyclone group equips three small cone hydrocyclones with overflow center pipes and sedimentation nozzles with large cone ratios, and equips three large cone hydrocyclones with overflow center pipes and sedimentation nozzles with small cone ratios, forming two systems to deal with coarse and fine particle requirements respectively. When switching, it can be quickly switched by simply opening and closing the feed valve of the hydrocyclone.

[0035] In practice, the first step is to order and install a hydrocyclone assembly that can meet different grading requirements into the working position according to production needs. During use, the process is as follows: First, equip the three small cone hydrocyclones with overflow center pipes and settling nozzles with large cone ratios, and equip the three large cone hydrocyclones with overflow center pipes and settling nozzles with small cone ratios. Second, based on the current production situation, select one to three hydrocyclones from the appropriate assembly for use. Third, open the feed valves of the selected hydrocyclones to the fully open position, and close all feed valves of the unselected hydrocyclones to the fully closed position. Fourth, put the assembly into use. Fifth, monitor the grading efficiency, return sand ratio, and overflow solids fineness. Sixth, repeat steps two through five when changing ore or when the required indicators change in the opposite direction. This completes the usage process of a hydrocyclone assembly that can meet different grading requirements.

[0036] Example 1

[0037] Implementation conditions:

[0038] Two swirlers of type A are activated, while the remaining swirlers are deactivated.

[0039] The diameter of the cylindrical vortex is ¢500mm, and the cone angle is 30°.

[0040] The overflow center tube of the cyclone separator is ¢180mm;

[0041] The specification for the cyclone separator's settling nozzle is ¢85mm;

[0042] The supporting mill is a two-stage grinding process consisting of a rod mill (¢3200×4500) + a ball mill (¢3600×5080) + a hydrocyclone.

[0043] The ore used was imported Guinea gibbsite-type bauxite;

[0044] The mill has a raw ore processing capacity of 150 t / h;

[0045] The quality standards for raw ore slurry are: <2% on a Taylor standard sieve (+20 mesh), 25%-35% on a +100 mesh sieve; and a solid content of 350-450 g / L.

[0046] Implementation steps:

[0047] The feed valves selected to use cyclones are opened to the fully open position, and the feed valves not selected to use cyclones are all closed to the fully closed position. The mill feed is then put into operation, and the classification efficiency, return sand ratio, and overflow solid fineness index are monitored.

[0048] In this embodiment, the pressure gauge shows that the pressure inside the hydrocyclone distributor is 0.09-0.10 MPa. Through laboratory testing, the 20-mesh particle size classification efficiency is 90%, the return sand ratio is 100%, and the overflow solid fineness index is +20 mesh 0.1% and +100 mesh 31%, which meets the target requirements.

[0049] Example 2

[0050] Implementation conditions:

[0051] Three of the B-type cyclones are in operation, while the remaining cyclones are shut down.

[0052] The diameter of the cylindrical cyclone separator is ¢500mm, and the cone angle is 210°.

[0053] The overflow center tube of the cyclone separator is ¢125mm;

[0054] The specification for the cyclone separator's sand-collecting nozzle is ¢95mm;

[0055] The supporting mill is a two-stage grinding process consisting of a rod mill (¢3200×4500) + a ball mill (¢3600×5080) + a hydrocyclone.

[0056] The ore used was domestic gibbsite-type bauxite;

[0057] The mill has a raw ore processing capacity of 130 t / h;

[0058] The quality standards for raw ore slurry are: +60 mesh <1%, +230 mesh <30%; solids content 250-350 g / L.

[0059] Implementation steps:

[0060] The feed valves selected to use cyclones are opened to the fully open position, and the feed valves not selected to use cyclones are all closed to the fully closed position. The mill feed is then put into operation, and the classification efficiency, return sand ratio, and overflow solid fineness index are monitored.

[0061] In this embodiment, the pressure gauge shows that the pressure inside the hydrocyclone distributor is 0.10-0.11 MPa. Through laboratory testing, the 60-mesh particle size classification efficiency is 96%, the return sand ratio is 300%, and the overflow solid fineness index is +60 mesh 0.5% and +230 mesh 22%, which meets the target requirements.

[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydrocyclone assembly capable of meeting different grading requirements, comprising a distributor (1), a bottom flow pool body (10), and an overflow pool body (9), characterized in that: A pressure gauge (3) is installed on the distributor (1), a hydrocyclone feed pipe (2) is provided at the bottom of the distributor (1), and a type A hydrocyclone feed pipe (18) and a type B hydrocyclone feed pipe (19) are respectively connected to both sides of the distributor (1). The A-type cyclone feed pipe (18) is equipped with an A-type cyclone feed valve (4), the A-type cyclone feed pipe (18) is connected to an A-type cyclone body (5), the bottom of the A-type cyclone body (5) is provided with an A-type sand nozzle (8), the top of the A-type cyclone body (5) is equipped with an A-type central pipe (7), and the A-type central pipe (7) is connected to an A-type overflow pipe (6). The feed pipe (19) of the type B cyclone is equipped with a feed valve (11) of type B cyclone, the feed pipe (19) of type B cyclone is connected to a body (12) of type B cyclone, the bottom of the body (12) of type B cyclone is provided with a sand discharge nozzle (15), the top of the body (12) of type B cyclone is equipped with a central tube (14), and the central tube (14) of type B cyclone is connected to an overflow pipe (13). The settling nozzle A (8) and settling nozzle B (15) are connected inside the underflow tank body (10), and the underflow tank body (10) is provided with an underflow tank discharge pipe (17) at the bottom end. The overflow pipe A (6) and overflow pipe B (13) are connected inside the overflow pool body (9), and the overflow pool body (9) is provided with an overflow pool discharge pipe (16) at the bottom.

2. A hydrocyclone assembly according to claim 1 that can meet different grading requirements, characterized in that: The type A vortex body (5) and type B vortex body (12) are configured as two different types of vortex bodies with different cone angles.

3. A hydrocyclone assembly according to claim 1 that can meet different grading requirements, characterized in that: The specifications of the central tube A (7) and the central tube B (14) are different.

4. A hydrocyclone assembly according to claim 1 that can meet different grading requirements, characterized in that: The specifications of the sinker caps (8) and sinker caps (15) are different.

5. A hydrocyclone assembly according to claim 1 that can meet different grading requirements, characterized in that: The bottom of the distributor (1) is connected to the feed pipe (2) of the hydrocyclone group via a flange, and a pressure gauge (3) is installed on the top of the distributor (1) to monitor and display the pressure inside the distributor (1).

Images