Ceramic rotary thickener

Abstract

The invention discloses a ceramic rotary thickener which comprises a closed chamber, a filter plate fixing assembly with a first hollow structure is arranged in the closed chamber, the filter plate fixing assembly is connected with a transmission shaft capable of driving the filter plate fixing assembly to rotate, at least one row of ceramic filter plates in the circumferential direction are installed on the filter plate fixing assembly, and the ceramic filter plates are provided with second hollow structures. Filtering holes are formed in the plate surface, and the second hollow structure is communicated with the first hollow structure; the filter plate fixing assembly is connected with a liquid outlet pipe penetrating out of the closed cavity, and the liquid outlet pipe is communicated with the first hollow structure. The ceramic filter plate is adopted as a filter medium, it is guaranteed that filtrate is completely clarified, solid and liquid are completely separated, the ceramic plate is installed on the fixing assembly in the sealed shell, the filtrate throughput of the ceramic plate is increased along with increase of the ore feeding pressure, and the ceramic plate can adapt to large-range ore quantity fluctuation; therefore, the stability of the excess flow of the ceramic plate is ensured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of metallurgy, and relates to a concentrating machine for ore dressing, in particular to a ceramic rotary thickener. BACKGROUND

[0002] The conventional ore dressing plant or hydrometallurgical plant generally adopts a thickener for thickening of ore slurry, which is a solid-liquid separation equipment based on gravity settling action and is composed of a pool body with a conical bottom, a stirring rake frame and a central ore feeding cylinder. Details are shown in the attached drawing. Figure 1 The thickener comprises a shell 1, an overflow pipe 2, an overflow weir 3, a rake frame 4, an underflow pipe 5, a truss beam 6, a feeding bucket 7, a main shaft 8, a transmission device 9 and a feeding pipe 10. The main principle is to use the gravity effect on mineral particles in the upward flow of the ore slurry to make the mineral particles settle to the bottom of the pool body, concentrate in the conical body and be discharged, and make the clarified liquid be discharged through the overflow weir 3 at the upper part of the pool body, so as to realize the solid-liquid separation and thickening. As a mature thickening equipment, the thickener has the advantages of simple structure and low cost, has been successfully applied for nearly a hundred years, and although some improvements have been made, such as high-efficiency thickener, deep-cone thickener and inclined plate thickener, the principle is still based on gravity settling and there is no essential difference. The main disadvantages of the conventional thickener are large floor area, large capital investment and easy overflow of muddy water due to fluctuation of ore quantity, and incomplete solid-liquid separation. SUMMARY

[0003] In order to overcome the above-mentioned disadvantages of the prior art, the purpose of the present application is to provide a ceramic rotary thickener with small floor area, small capital investment, wide range of ore quantity fluctuation and complete solid-liquid separation.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: A ceramic rotary thickener comprises a closed chamber, a filter plate fixing assembly with a first hollow structure is arranged in the closed chamber, the filter plate fixing assembly is connected with a transmission shaft capable of driving the filter plate fixing assembly to rotate, at least one row of ceramic filter plates in the circumferential direction is mounted on the filter plate fixing assembly, the ceramic filter plates have a second hollow structure and a filter hole on the plate surface, and the second hollow structure is in communication with the first hollow structure; the filter plate fixing assembly is connected with a liquid outlet pipe penetrating out of the closed chamber, and the liquid outlet pipe is in communication with the first hollow structure.

[0005] In one embodiment, the transmission shaft and the liquid outlet pipe are arranged at the axial two ends of the filter plate fixing assembly or at the axial same end of the filter plate fixing assembly, wherein the axial direction refers to the direction of the rotation axis of the filter plate fixing assembly.

[0006] In one embodiment, the drive shaft and the outlet pipe are connected to the outer shell of the sealed chamber by a first mechanical seal and a second mechanical seal, respectively. The outlet pipe is fixed by a bearing seat and a bearing, and its end is provided with an internal reverse wire and an outlet rotary joint is installed as a filtrate outlet.

[0007] In one embodiment, the drive shaft drives the filter plate fixing assembly, the ceramic filter plate, and the liquid outlet pipe to rotate, and the rotation speed controls the linear velocity of the outer edge of the filter plate to be between 0.5m / s and 5m / s.

[0008] In one embodiment, the sealed chamber has an inlet at the top and an outlet at the bottom, and a pressure reducing valve at the outlet to maintain the pressure in the sealed chamber between 0.05 and 0.5 MPa.

[0009] In one embodiment, an ultrasonic cleaner for cleaning the ceramic filter plate is installed on the inner wall of the sealed chamber.

[0010] In one embodiment, the filter plate fixing assembly consists of a perforated tube and a plurality of perforated discs. The discs are coaxially mounted on the tube, the tube wall has openings for mounting ceramic filter plates, and the discs have openings for fixing the surface of the filter plates.

[0011] In one embodiment, a single ceramic filter plate is fan-shaped with a second hollow structure, and a single row of ceramic filter plates is installed on the filter plate fixing assembly to form a 360° circular filter.

[0012] In one embodiment, a sector of the ceramic filter plate faces the feed inlet of the sealed chamber.

[0013] In one embodiment, the pore size of the filter holes on the ceramic filter plate ranges from 0.5 μm to 100 μm.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses ceramic filter plates as the filter medium, which ensures the cleanliness of the filtrate and thus eliminates the turbidity problem that often occurs in traditional thickeners.

[0015] 2. This invention utilizes the high-speed rotation of ceramic filter plates to automatically clean the surface of the filter plates by friction between the filter plates and the slurry, thus preventing filter cake from accumulating on the surface of the filter plates. At the same time, it has a certain stirring effect on the slurry, reducing the concentration stratification of the slurry and ensuring the continuity of the concentration process.

[0016] 3. This invention uses pressurized filtration, which increases the filtrate throughput of the filter plate and improves the equipment's processing capacity.

[0017] 4. By using multiple rows of filter plates connected in parallel, this invention increases the filtration area per unit volume, achieving a compact device and reducing the floor space required. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a thickener in the prior art.

[0019] Figure 2 This is a schematic diagram of the structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the filter plate fixing assembly of the present invention.

[0021] Figure 4 This is a schematic diagram of the filter plate fixing assembly of the present invention.

[0022] Figure 5 This is a schematic diagram of the liquid outlet pipe structure of the present invention. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings and examples.

[0024] like Figure 2 As shown, this invention is a ceramic rotary thickener, comprising a sealed chamber, within which a filter plate fixing assembly 4 and a ceramic filter plate 7 are disposed, with the ceramic filter plate 7 mounted on the filter plate fixing assembly 4. The filter plate fixing assembly 4 has a first hollow structure, and the ceramic filter plate 7 has a second hollow structure, with filter holes on its surface. Clearly, the filter holes are connected to the second hollow structure. Simultaneously, the second hollow structure is connected to the first hollow structure, and the first hollow structure is connected to a liquid outlet pipe 13, which extends out of the sealed chamber. This allows the clarified slurry to enter the second hollow structure through the filter holes, then enter the first hollow structure, and be discharged through the liquid outlet pipe 13, while the concentrated slurry remains within the sealed chamber.

[0025] The filter plate fixing assembly 4 is a rotatable structure, which also drives the ceramic filter plates 7 to rotate. The ceramic filter plates 7 can be arranged in a single row or multiple rows; here, "row" refers to the design along the rotation axis of the filter plate fixing assembly 4. Obviously, to ensure rotational efficiency, a single row of ceramic filter plates 7 should be arranged circumferentially. To achieve rotational drive, the filter plate fixing assembly 4 is connected to a drive shaft 6, which, powered by a power unit, drives the rotation of the filter plate fixing assembly 4.

[0026] This invention uses a ceramic filter plate 7 as the filter medium, which ensures complete clarification of the filtrate and achieves complete solid-liquid separation. The ceramic filter plate 7 is installed on the filter plate fixing assembly 4 in a sealed chamber. The filtrate throughput increases with the increase of the feed pressure, which can adapt to a wide range of ore quantity fluctuations. The rotating ceramic filter plate 7 maintains a clean plate surface through friction with the ore slurry, thereby ensuring a stable flow rate. At the same time, the rotating ceramic filter plate 7 also acts as a stirrer, which can prevent the concentration stratification of the ore slurry during the filtration process and ensure the continuity of the process.

[0027] In one embodiment, the sealed chamber of the present invention comprises a housing 1 and an end cap 9, with a drive shaft 6 and an outlet pipe 13 respectively arranged at both axial ends of the filter plate fixing assembly 4. Specifically, the drive shaft 6 passes through the housing 1 and is connected to a drive motor outside the chamber, while the outlet pipe 13 passes through the end cap 9. In this invention, "axial" obviously refers to the length direction of the rotation axis of the filter plate fixing assembly 4. In some embodiments, the drive shaft 6 and the outlet pipe 13 may also be arranged at the same end, but this may pose some difficulties for installation.

[0028] In one embodiment, to ensure system airtightness, the drive shaft 6 and the outlet pipe 13 are respectively mounted on the housing 1 and the end cover 9 via a first mechanical seal 5 and a second mechanical seal 10. This ensures the airtightness of the chamber under a certain pressure, maintains the filtration pressure, stabilizes the filtrate throughput of the ceramic filter plate 7, and also prevents material leakage. The outlet pipe 13 is fixed to the end cover 9 via bearing seats 11 and bearings 12, allowing it to rotate with the filter plate fixing assembly 4 and the ceramic filter plate 7. The rotation speed is controlled by a motor to ensure the linear velocity of the outer edge of the filter plate is between 0.5 m / s and 5 m / s. If the rotation speed is too low, the filter plate will not be able to achieve self-cleaning; if the rotation speed is too high, the filter plate strength will be insufficient. Automatic cleaning of the filter plate surface is achieved through friction between the ceramic filter plate 7 and the slurry, preventing filter cake buildup on the surface of the ceramic filter plate 7, thus ensuring a continuous concentration process and achieving better filtration and filter plate cleaning effects.

[0029] like Figure 5 As shown, the liquid outlet pipe 13 of the present invention is a hollow pipe. One end is connected to the connecting plate at the end of the perforated pipe of the filter plate fixing assembly 4 by bolts through the connecting plate welded to the pipe. The other end is fixed to the housing 1 through the bearing seat 11. The end is provided with an internal reverse thread and a liquid outlet rotary joint 14 is installed to serve as the filtrate outlet of the whole machine. This ensures that when the liquid outlet pipe 13 rotates with the filter plate fixing assembly 4, an externally fixed drainage pipe is connected.

[0030] When the equipment is running, the slurry enters the sealed chamber consisting of the shell 1 and the end cover 9 through the feed inlet 2. The clear liquid passes through the ceramic filter plate 7 and enters the filter plate fixing assembly 4. Then it is discharged through the liquid outlet pipe 13 and the liquid outlet rotary joint 14 fixed on the assembly 4. The concentrated slurry is discharged through the outlet pressure reducing valve 8.

[0031] In one embodiment, the inlet 2 of the sealed chamber is located at the upper part of the chamber shell, while the outlet is located at the lower part or bottom, serving as the inlet and outlet channels for the liquid. A pressure reducing valve 8 is installed at the outlet to maintain the pressure in the sealed chamber between 0.05 and 0.5 MPa. Utilizing the characteristic that the filtrate throughput of the ceramic filter plate 7 increases with increasing pressure, the pressure in the sealed chamber can be adjusted by regulating the pressure of the pressure reducing valve 8, thereby adjusting the processing capacity of the equipment to adapt to fluctuations in the liquid flow rate. The slurry enters the sealed chamber composed of the shell 1 and the end cap 9 through the inlet 2. The clear liquid permeates through the ceramic filter plate 7 into the first hollow structure of the filter plate fixing assembly 4, and is then discharged through the outlet pipe 13 and the outlet rotary joint 14. The concentrated slurry is discharged through the pressure reducing valve 8.

[0032] Since impurities are unavoidable in the slurry, long-term operation will inevitably lead to clogging of the filter plate pores. Therefore, in one embodiment, an ultrasonic cleaner 3 is installed on the inner wall of the sealed chamber. Specifically, it can be installed on the side of the sealed chamber, preferably opposite the front panel of the ceramic filter plate 7, for cleaning the ceramic filter plate 7. Here, the front panel refers to the side facing the feed inlet 2. The ceramic filter plate 7 can be cleaned periodically by setting a timer to ensure the continuous operation of the concentration process.

[0033] like Figure 3 As shown, in one embodiment, the filter plate fixing assembly 4 consists of a perforated tube and several perforated discs. The discs have a central opening and are coaxially mounted on the tube. The tube wall has openings for mounting ceramic filter plates 7, and the discs also have openings on their surfaces to fix the ceramic filter plates 7, ensuring that the ceramic filter plates 7 do not loosen during high-speed rotation. The number of openings in the tube wall can be divided into several rings, with multiple openings per ring. The number of rings is the same as the number of discs and the number of rows of ceramic filter plates 7, and the number of openings per ring is the same as the number of ceramic filter plates 7 in a single row. The filtration area can be increased by increasing the number of rows. Multiple rows of parallel ceramic filter plates 7 can increase the filtration area, increase the throughput, and reduce the floor space required.

[0034] like Figure 4 As shown, in one embodiment, a single ceramic filter plate 7 is fan-shaped with a second hollow structure. A steel wire end can be designed at the base for mounting on the filter plate fixing assembly 4. The angle of the fan shape varies depending on the radius. A single row of ceramic filter plates 7 is mounted on the filter plate fixing assembly 4, forming a 360° circular filter. The ceramic filter plates 7 and the filter plate fixing assembly 4 are located within a sealed chamber, and the assembly 4, the ceramic filter plates 7, and the outlet pipe 13 are rotated via a drive shaft 6.

[0035] In this embodiment, one fan-shaped surface of the ceramic filter plate 7 faces the feed inlet 2 of the sealed chamber, which can improve the filtration effect.

[0036] In one embodiment, the pore size of the filter holes on the ceramic filter plate 7 ranges from 0.5 μm to 100 μm, and is selected according to different filtrate cleanliness requirements.

[0037] To verify the effectiveness of the present invention, specific processing embodiments are provided as follows: Example 1 The overflow from the hydrocyclone classifier of a mine in Gansu Province was treated. The slurry contained 87% -200 mesh, had a concentration of 21%, and a specific gravity of 1.152. The particle size D90 (the particle size when the sieve rate is 90% by mass) was determined to be 85 μm using a BT9300HT laser particle size analyzer.

[0038] The above-mentioned slurry is processed using the ceramic rotary thickener of this invention, the ceramic rotary thickener having a filtration area of ​​1m². 2 The rotational speed is 1450 t / min, the filter plate has a pore size of 8 μm, and a frequency converter is configured to control the rotational speed. The feed pump is a DBY3-50 electric diaphragm pump with a rated flow rate of 9.7 m³ / min. 3 The flow rate is [value missing] / h, rated head 40m, motor power 2.2kw, and equipped with a frequency converter to control the flow rate. Specific conditions are as follows: Step 1: First, prepare 10m of slurry. 3 Feed the material into a φ3000×3500 mixing tank, connect it to the feed pump and start the mixing; Step 2: Turn on the feed pump and measure the flow rate at 50Hz, 40Hz and 30Hz respectively. The results are shown in the table below.

[0039]

[0040] Step 3: Connect the feed pump to the ceramic rotary thickener of this invention. First, turn on the feed pump at a frequency of 50 Hz, then turn on the ceramic rotary thickener of this invention at a frequency of 50 Hz and a flow rate of 10 m³ / h. 3 Run at 1000°C for 20 minutes, then return the filtrate and concentrate to the φ4000×4500 stirred tank. Record the pressure of the ceramic rotary thickener every 2 minutes; check the cleanliness of the filtrate.

[0041] Step 4: Connect the feed pump to the ceramic rotary thickener of this invention. First, turn on the feed pump at a frequency of 40 Hz, then turn on the ceramic rotary thickener of this invention at a frequency of 50 Hz and a flow rate of 8 m³ / h. 3 Run at 1000°C for 20 minutes, then return the filtrate and concentrate to the φ4000×4500 stirred tank. Record the pressure of the ceramic rotary thickener every 2 minutes; check the cleanliness of the filtrate.

[0042] Step 5: Connect the feed pump to the ceramic rotary thickener of this invention. First, turn on the feed pump at a frequency of 30 Hz, then turn on the ceramic rotary thickener of this invention at a frequency of 30 Hz and a flow rate of 6 m³ / h. 3Run at 1000°C for 20 minutes, then return the filtrate and concentrate to the φ4000×4500 stirred tank. Record the pressure of the ceramic rotary thickener every 2 minutes; check the cleanliness of the filtrate.

[0043] Step 6: Connect the feed pump to the ceramic rotary thickener of this invention. First, turn on the feed pump at a frequency of 50 Hz, then turn on the ceramic rotary thickener of this invention at a frequency of 40 Hz and a flow rate of 10 m³ / h. 3 Run at 1000°C for 20 minutes, then return the filtrate and concentrate to the φ4000×4500 stirred tank. Record the pressure of the ceramic rotary thickener every 2 minutes; check the cleanliness of the filtrate.

[0044] Step 7: Connect the feed pump to the ceramic rotary thickener of this invention. First, turn on the feed pump at a frequency of 50 Hz, then turn on the ceramic rotary thickener of this invention at a frequency of 30 Hz and a flow rate of 10 m³ / h. 3 Run at 1000°C for 20 minutes, then return the filtrate and concentrate to the φ4000×4500 stirred tank. Record the pressure of the ceramic rotary thickener every 2 minutes; check the cleanliness of the filtrate.

[0045] Step 8: Connect the feed pump to the ceramic rotary thickener of this invention. First, turn on the feed pump at a frequency of 50 Hz, then turn on the ceramic rotary thickener of this invention at a frequency of 20 Hz and a flow rate of 10 m³ / h. 3 Run at 1000°C for 20 minutes, then return the filtrate and concentrate to the φ4000×4500 stirred tank. Record the pressure of the ceramic rotary thickener every 2 minutes; check the cleanliness of the filtrate.

[0046] The running data is shown in the table below:

[0047] Operational data shows that the filtrate exhibits high cleanliness and thorough solid-liquid separation in all operating zones of the equipment of this invention; it can still operate normally when the feed flow rate fluctuates significantly by 25%; the pressure in the filtration chamber increases with the increase in throughput; when the feed flow rate is stable, the pressure in the filtration chamber increases as the rotation speed of the ceramic rotary thickener decreases, indicating that the decrease in rotation speed leads to a reduction in the self-cleaning ability of the filter plate surface, resulting in filter cake deposition.

[0048] The conversion of equipment throughput into dry ore volume is shown in the table below:

[0049] The operational results of the ceramic rotary thickener of this invention demonstrate that, at a filtration pressure of 0.1–0.24 MPa, the equipment can achieve a processing capacity of 40–50 t / d·m³. 2 1000t / d only requires 25m 2 The equipment occupies an area of ​​approximately 10 square meters. 2Compared to traditional thickeners with the same processing capacity, which require a diameter of 24m and a floor area of ​​450m², this is significantly different. 2 Its advantages are obvious.

[0050] Example 2 The gold concentrate slurry from a flotation mine in Henan Province was processed. The slurry had a -200 mesh content of 75%, a concentration of 19%, and a specific gravity of 1.150. The particle size D90 (the particle size when the sieve rate is 90% by mass) was determined to be 118 μm using a BT9300HT laser particle size analyzer.

[0051] The above-mentioned slurry is processed using the ceramic rotary thickener of this invention, the ceramic rotary thickener having a filtration area of ​​1m². 2 The rotational speed is 1450 t / min, the filter plate has a pore size of 8 μm, and a frequency converter is configured to control the rotational speed. The feed pump is a DBY3-50 electric diaphragm pump with a rated flow rate of 9.7 m³ / min. 3 The flow rate is [value missing] / h, rated head 40m, motor power 2.2kw, and equipped with a frequency converter to control the flow rate. Specific conditions are as follows: Step 1: First, prepare 10m of slurry. 3 Feed the material into a φ3000×3500 mixing tank, connect it to the feed pump and start the mixing; Step 2: Turn on the DBY3-50 feed pump and measure the flow rate at 50Hz, 40Hz, and 30Hz respectively. The results are shown in the table below.

[0052] Step 3: Connect the feed pump to the ceramic rotary thickener of this invention. First, turn on the feed pump at a frequency of 50 Hz, then turn on the ceramic rotary thickener of this invention at a frequency of 50 Hz and a flow rate of 10 m³ / h. 3 Run at 1000°C for 20 minutes, then return the filtrate and concentrate to the φ4000×4500 stirred tank. Record the pressure of the ceramic rotary thickener every 2 minutes; check the cleanliness of the filtrate.

[0053] Step 4: Connect the feed pump to the ceramic rotary thickener of this invention. First, turn on the feed pump at a frequency of 40 Hz, then turn on the ceramic rotary thickener of this invention at a frequency of 50 Hz and a flow rate of 8 m³ / h. 3 Run at 1000°C for 20 minutes, then return the filtrate and concentrate to the φ4000×4500 stirred tank. Record the pressure of the ceramic rotary thickener every 2 minutes; check the cleanliness of the filtrate.

[0054] Step 5: Connect the feed pump to the ceramic rotary thickener of this invention. First, turn on the feed pump at a frequency of 30 Hz, then turn on the ceramic rotary thickener of this invention at a frequency of 30 Hz and a flow rate of 6 m³ / h. 3 Run at 1000°C for 20 minutes, then return the filtrate and concentrate to the φ4000×4500 stirred tank. Record the pressure of the ceramic rotary thickener every 2 minutes; check the cleanliness of the filtrate.

[0055] Step 6: Connect the feed pump to the ceramic rotary thickener of this invention. First, turn on the feed pump at a frequency of 50 Hz, then turn on the ceramic rotary thickener of this invention at a frequency of 40 Hz and a flow rate of 10 m³ / h. 3 Run at 1000°C for 20 minutes, then return the filtrate and concentrate to the φ4000×4500 stirred tank. Record the pressure of the ceramic rotary thickener every 2 minutes; check the cleanliness of the filtrate.

[0056] Step 7: Connect the feed pump to the ceramic rotary thickener of this invention. First, turn on the feed pump at a frequency of 50 Hz, then turn on the ceramic rotary thickener of this invention at a frequency of 30 Hz and a flow rate of 10 m³ / h. 3 Run at 1000°C for 20 minutes, then return the filtrate and concentrate to the φ4000×4500 stirred tank. Record the pressure of the ceramic rotary thickener every 2 minutes; check the cleanliness of the filtrate.

[0057] Step 8: Connect the feed pump to the ceramic rotary thickener of this invention. First, turn on the feed pump at a frequency of 50 Hz, then turn on the ceramic rotary thickener of this invention at a frequency of 20 Hz and a flow rate of 10 m³ / h. 3 Run at 1000°C for 20 minutes, then return the filtrate and concentrate to the φ4000×4500 stirred tank. Record the pressure of the ceramic rotary thickener every 2 minutes; check the cleanliness of the filtrate.

[0058] The running data is shown in the table below:

[0059] The operational data for processing gold concentrate slurry shows that the filtrate of the equipment of this invention exhibits high cleanliness in all working zones, and the solid-liquid separation is thorough and complete. It can still operate normally when the feed flow rate fluctuates significantly by 25%. The pressure in the filtration chamber increases with the increase in processing capacity. When the feed flow rate is stable, the pressure in the filtration chamber increases as the rotation speed of the ceramic rotary thickener decreases, indicating that the decrease in rotation speed leads to a reduction in the self-cleaning ability of the filter plate surface, resulting in filter cake deposition.

[0060] The conversion of equipment throughput into dry ore volume is shown in the table below:

[0061] The operational results of the ceramic rotary thickener of this invention demonstrate that, at a filtration pressure of 0.09–0.12 MPa, the equipment can achieve a processing capacity of 40–50 t / d·m³. 2 The concentrator has a gold concentrate output of 70 tons per day, is equipped with one 12m thickener, and occupies an area of ​​160 square meters. 2 Approximately 2m is required if the present invention is used. 2 One piece of equipment, occupying an area of ​​3m² 2 The left and right sides have obvious advantages.

Claims

1. A ceramic rotary thickener, characterized by, The application relates to a filter device, which comprises a closed chamber, a filter plate fixing assembly (4) with a first hollow structure arranged in the closed chamber, a transmission shaft (6) capable of driving the filter plate fixing assembly (4) to rotate, at least one row of ceramic filter plates (7) installed on the filter plate fixing assembly (4) in a circumferential direction, the ceramic filter plates (7) having a second hollow structure and a filter hole on a plate surface, the second hollow structure being communicated with the first hollow structure, and a liquid outlet pipe (13) connected to the filter plate fixing assembly (4) and communicated with the first hollow structure.

2. The ceramic rotary concentrator of claim 1, wherein, The transmission shaft (6) and the liquid outlet pipe (13) are arranged at axial two ends of the filter plate fixing assembly (4) or arranged at axial same ends of the filter plate fixing assembly (4), wherein the axial direction refers to the direction of the rotating shaft of the filter plate fixing assembly (4).

3. The ceramic rotary concentrator of claim 1 or 2, wherein, The transmission shaft (6) and the liquid outlet pipe (13) are connected to the shell of the closed chamber through first mechanical seals (5) and second mechanical seals (10) respectively, the liquid outlet pipe (13) is fixed through a bearing seat (11) and a bearing (12), the end of the liquid outlet pipe (13) is provided with an inner reverse thread, and a liquid outlet rotary joint (14) is installed as a filtrate outlet.

4. The ceramic rotary concentrator of claim 1, wherein, The transmission shaft (6) drives the filter plate fixing assembly (4), the ceramic filter plates (7) and the liquid outlet pipe (13) to rotate, and the rotating speed is controlled to be between 0.5 m / s and 5 m / s.

5. The ceramic rotary concentrator of claim 1, wherein, A feeding port (2) is arranged on the upper portion of the shell of the closed chamber, a discharging port is arranged on the lower portion or the bottom of the shell, a pressure reducing valve (8) is arranged on the discharging port, and the pressure in the closed chamber is kept between 0.05 MPa and 0.5 MPa.

6. The ceramic rotary concentrator of claim 1, wherein, An ultrasonic cleaner (3) for cleaning the ceramic filter plates (7) is arranged on the inner wall of the closed chamber.

7. The ceramic rotary concentrator of claim 1, wherein, The filter plate fixing assembly (4) is composed of a perforated pipe and a plurality of perforated disc plates, the disc plates are coaxially arranged on the pipe, the pipe wall is perforated for installing the ceramic filter plates (7), and the disc plates are perforated for fixing the plate surfaces of the filter plates (7).

8. The ceramic rotary concentrator of claim 1, wherein, The ceramic filter plates (7) are single-piece and have a second hollow structure, and a single row of the ceramic filter plates (7) is arranged on the filter plate fixing assembly (4) to form a 360-degree circular filtration.

9. The ceramic rotary concentrator of claim 8, wherein, One fan-shaped surface of the ceramic filter plates (7) faces the feeding port (2) of the closed chamber.

10. The ceramic rotary concentrator of claim 1 or 8 or 9, wherein, The filter hole on the ceramic filter plates (7) has a pore size ranging from 0.5 mu m to 100 mu m.

Images