A filter and sorting device for hypergravity sorting

Abstract

The application discloses a filter and a sorting device for high gravity sorting, relates to the technical field of fine-grained mineral gravity sorting, and aims to solve the problems of poor filtering effect on overflow products, low sorting efficiency caused by too many minerals in filtrate and the problem that the filtrate cannot be reused in the prior art. The filter comprises a propeller blade, an outer cylinder and an inner cylinder, the propeller blade is arranged in the inner cylinder, the inner cylinder is arranged in the outer cylinder, and a space between the inner cylinder and the outer cylinder is used as a filtrate space; a spiral gap extending along the axial direction of the inner cylinder is formed in the side wall of the inner cylinder, the spiral gap is coaxially arranged with the inner cylinder, a spiral screen is arranged on the spiral gap, the inner cylinder is communicated with the filtrate space through the spiral screen, a discharge port is formed in the bottom end of the inner cylinder, and a liquid discharge port is formed in the bottom end of the filtrate space. The application can be used for mineral sorting.

Description

Technical Field

[0001] This invention relates to the field of gravity separation technology for fine-grained minerals, and more particularly to a filter and separation device for ultragravity separation. Background Technology

[0002] Minerals, as important raw materials for modern social development, are one of the essential substances upon which human civilization depends. With the increasing mechanization of mining, the content of fine-grained materials in raw ore is gradually increasing, and high-gravity separation is one of the technologies that can effectively separate fine-grained minerals.

[0003] However, the high gravity separation process has problems such as high water consumption and the inability to dehydrate and filter overflow products in a timely manner. It is necessary to develop and design supporting high-efficiency dehydration equipment to improve the filtration and dehydration efficiency of overflow products, ensure the reuse of filtrate, and thus save water resources. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a filter and sorting device for supergravity sorting, in order to solve the problems of poor filtration effect on overflow products, low sorting efficiency due to high mineral content in the filtrate, and inability to reuse the filtrate in the prior art.

[0005] The objective of this invention is mainly achieved through the following technical solutions:

[0006] This invention provides a filter for gravity sorting, comprising a propeller blade, an outer cylinder, and an inner cylinder. The propeller blade is disposed in the inner cylinder, and the inner cylinder is disposed in the outer cylinder. The space between the inner cylinder and the outer cylinder serves as a filtrate space. A spiral slit extending along the axial direction of the inner cylinder is formed on the side wall of the inner cylinder. The spiral slit is coaxially arranged with the inner cylinder. A spiral screen covers the spiral slit, allowing the inner cylinder to communicate with the filtrate space through the spiral screen. A discharge port is formed at the bottom end of the inner cylinder, and a liquid discharge port is formed at the bottom end of the filtrate space.

[0007] Furthermore, it also includes a spiral brush, which is located in the filtrate space and is spiral in shape, corresponding to the position of the spiral screen.

[0008] Furthermore, it also includes a double-layer solenoid valve; the outer layer of the double-layer solenoid valve is connected to the filtrate space to control the discharge of filtrate; the inner layer of the double-layer solenoid valve is connected to the inner cylinder to control the discharge of filter residue.

[0009] Furthermore, the inner layer of the double-layer solenoid valve is a filter screen with the same aperture as the spiral screen.

[0010] Furthermore, the distance between the propeller blades and the spiral screen is 0.2–0.5 mm.

[0011] Furthermore, the opening rate of the spiral screen is 15% to 20%, and the aperture of the spiral screen is smaller than the minimum particle size of the feed mineral.

[0012] Furthermore, it also includes a flow guiding component, which includes a flow guiding base. The flow guiding base has a flow guiding inlet, a first outlet, and a second outlet. The flow guiding inlet is connected to the outlet of the inner cylinder and the outlet of the filtrate space. The first outlet is connected to the conveyor belt, and the second outlet is connected to the water storage tank.

[0013] Furthermore, the flow guiding component also includes a flow guiding meter, which is located on the second discharge port.

[0014] Furthermore, the flow guiding assembly also includes a pivoting baffle, which is pivotally connected to the flow guiding substrate and has a first blocking mode and a second blocking mode. During filtration, the pivoting baffle is in the first blocking mode, covering the first discharge port, and the discharge port of the filtrate space is connected to the water storage tank through the second discharge port. After filtration, the pivoting baffle is in the second blocking mode, covering the second discharge port, and the discharge port of the inner cylinder is connected to the conveyor belt through the first discharge port.

[0015] The present invention also provides a sorting device, including the above-described filter.

[0016] Compared with the prior art, the present invention can achieve at least the following beneficial effects:

[0017] The filter for gravity sorting provided by this invention has a double-layer structure. The inner cylinder mainly serves as a compression space, where the overflow is compressed by the rotation of the propeller blades. Since the inner cylinder is connected to the filtrate space through a spiral screen with a multi-ring structure, the filtrate is filtered in multiple rings along the axial direction of the inner cylinder. The filtrate space is mainly used for the flow of filtrate, and the filtrate flows out separately from the filtrate space. Compared with the filtrate being discharged from the bottom of the inner cylinder, the flow resistance of the filtrate space is smaller, which facilitates the discharge of filtrate.

[0018] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0020] Figure 1 This is a schematic diagram of the filter structure provided in Embodiment 1 of the present invention;

[0021] Figure 2 This is a schematic diagram of the inner cylinder structure in the filter provided in Embodiment 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of the flow guiding component in the filter provided in Embodiment 1 of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the supergravity mineral processing device provided in Embodiment 1 of the present invention;

[0024] Figure 5 This is a schematic diagram of the particle washing component in the ultragravity mineral processing device provided in Embodiment 1 of the present invention;

[0025] Figure 6 This is a schematic diagram of the material collection trough in the ultragravity mineral processing device provided in Embodiment 1 of the present invention;

[0026] Figure 7 This is a schematic diagram of the regulating component in the ultragravity mineral processing device provided in Embodiment 1 of the present invention.

[0027] Figure label:

[0028] 1-Feed concentration meter; 2-Slurry supply solenoid valve; 3-Raw ore slurry tank; 4-Agitator assembly; 5-Feed level gauge; 6-Slurry pump; 7-Feed solenoid valve; 8-Feed pipe; 9-Particle washing assembly; 901-Particle washing motor; 902-Particle washing water inlet pipe; 903-Annular water pipe; 904-Washing water hole; 905-Particle washing water inlet valve; 10-Drum; 1001-Vertical wall; 1002-Fluidizing water hole; 1003-Lower side wall; 1004-Tension spring; 1005-Upper mounting protrusion; 1006-Lower mounting protrusion; 1007-Adjusting rod; 11-Inner sleeve; 12-Outer sleeve; 13-Overflow port; 14-Buffer tank; 15-Buffer level gauge; 16-Buffer 17-Concentration meter; 18-Buffer solenoid valve; 19-Filter; 10-Filter motor; 11-Propeller blade; 12-Outer cylinder; 13-Spiral brush; 14-Filter shaft; 15-Inner cylinder; 16-Spiral screen; 17-Pivot baffle; 28-Flow guide assembly; 29-First discharge port; 20-Second discharge port; 20-Conveyor belt; 21-Water storage tank; 22-Double-layer solenoid valve; 23-Flow guide flow meter; 24-Frame; 25-Make-up solenoid valve; 26-Water pump; 27-Backwash solenoid valve; 28-Slurry distributor; 29-Backwash pipe; 30-Shaft; 31-Rotating motor; 32-Underflow port; 33-Frequency converter. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of the present invention and are used together with the invention to illustrate the principles of the invention.

[0030] Example 1

[0031] This embodiment provides a filter for gravity sorting, see [link to relevant documentation]. Figures 1 to 2 The filter is cylindrical in shape and includes a filter motor 1801, a filter shaft 1805, a propeller blade 1802, an outer cylinder 1803, and an inner cylinder 1806. The filter shaft 1805 and the propeller blade 1802 are located in the inner cylinder 1806. The propeller blade 1802 is located on the outer circumferential surface of the filter shaft 1805. The filter motor 1801 is connected to the filter shaft 1805 and is used to drive the filter shaft 1805 and the propeller blade 1802 to rotate. The inner cylinder 1806... 6 is located in the outer cylinder 1803. The space between the inner cylinder 1806 and the outer cylinder 1803 serves as the filtrate space. A spiral slit extending along the axial direction of the inner cylinder 1806 is opened on the side wall of the inner cylinder 1806. The spiral slit is coaxially arranged with the inner cylinder 1806. A spiral screen 1807 covers the spiral slit, so that the inner cylinder 1806 is connected to the filtrate space through the spiral screen 1807. A discharge port is opened at the bottom end of the inner cylinder 1806, and a liquid discharge port is opened at the bottom end of the filtrate space.

[0032] During implementation, the filter motor 1801 is turned on, and the propeller blade 1802 starts to rotate. The slurry flowing out of the buffer tank 14 enters the inner cylinder 1806 from the top. The propeller blade 1802 squeezes the slurry in the inner cylinder 1806. The squeezed water flows through the spiral screen 1807 into the filtrate space and then flows out from the filtrate space. The filtered residue is transported to the bottom of the inner cylinder 1806 and then discharged from the bottom of the inner cylinder 1806.

[0033] Compared with the prior art, the filter for gravity sorting provided in this embodiment has a double-layer structure. The inner cylinder 1806 mainly serves as a compression space, where the overflow is compressed by the rotation of the propeller blade 1802. Since the inner cylinder 1806 is connected to the filtrate space through the spiral screen 1807, which has a multi-ring structure, the filtrate is filtered in multiple rings along the axial direction of the inner cylinder. The filtrate space is mainly used for the flow of filtrate, and the filtrate flows out separately from the filtrate space. Compared with the filtrate being discharged from the bottom of the inner cylinder 1806, the flow resistance of the filtrate space is smaller, which facilitates the discharge of filtrate.

[0034] In order to further filter the filtrate, the filter 18 also includes a spiral brush 1804. The spiral brush 1804 is disposed in the filtrate space and is also spiral in shape, corresponding to the position of the spiral screen 1807. In this way, the material can be effectively reduced to block the spiral screen 1807, and the filtrate flowing into the filtrate space from the spiral screen 1807 needs to pass through the spiral brush 1804 before it can flow out of the filtrate space, thereby enabling further filtration of the filtrate.

[0035] To enable automatic discharge of filter cake and filtrate, the filter 18 also includes a double-layer solenoid valve 23. The outer layer of the double-layer solenoid valve 23 is connected to the filtrate space to control the discharge of filtrate, and the inner layer of the double-layer solenoid valve 23 is connected to the inner cylinder 1806 to control the discharge of filter cake. Specifically, during filtration, the outer layer of the double-layer solenoid valve 23 is open to facilitate the discharge of filtrate, and after filtration, the inner layer of the double-layer solenoid valve 23 is open to facilitate the discharge of filter cake.

[0036] For example, the distance between the propeller blade 1802 and the inner cylinder 1806 is 0.2 to 0.5 mm; the inner layer of the double-layer solenoid valve 23 is a filter screen with the same pore size as the spiral screen 1807, and the outer layer is a stainless steel sleeve; the opening rate of the spiral screen 1807 is 15% to 20%, and the pore size of the spiral screen 1807 is smaller than the minimum particle size of the feed mineral.

[0037] To facilitate product collection, obtain overflow mineral volume, and promote water resource recycling, the filter 18 also includes a flow guiding component 20, see [link to relevant documentation]. Figure 3 The flow guiding assembly 20 includes a flow guiding base and a flow guiding flow meter 24. The flow guiding base has a flow guiding inlet, a first outlet 2001 and a second outlet 2002. The flow guiding inlet is connected to the outlet of the inner cylinder 1806 and the outlet of the filtrate space and is located directly below the outer cylinder. The first outlet 2001 is connected to the conveyor belt 21 and the second outlet 2002 is connected to the water storage tank 22. The flow guiding flow meter 24 is installed on the second outlet 2002 to monitor the filtrate flow rate. If the filtrate flow rate is less than the threshold, it indicates that filtration is complete.

[0038] To enable the switching between the first discharge port 2001 and the second discharge port 2002, the aforementioned flow guiding assembly 20 further includes a pivoting baffle 19. The pivoting baffle 19 is pivotally connected to the flow guiding substrate and has a first blocking mode and a second blocking mode. During filtration, the pivoting baffle 19 is in the first blocking mode, covering the first discharge port 2001, and the outlet of the filtrate space is connected to the water storage tank 22 through the second discharge port 2002. After filtration, the pivoting baffle 19 is in the second blocking mode, covering the second discharge port 2002, and the discharge port of the inner cylinder 1806 is connected to the conveyor belt 21 through the first discharge port 2001 for unloading and transportation.

[0039] Example 2

[0040] This embodiment provides a supergravity mineral processing device, including the filter provided in Embodiment 1.

[0041] Compared with the prior art, the beneficial effects of the supergravity mineral processing device provided in this embodiment are basically the same as those of the filter provided in Embodiment 1, and will not be described in detail here.

[0042] For example, the above-mentioned ultragravity mineral processing device further includes a feeding unit and an ultragravity separation unit, see [link to relevant documentation]. Figure 4 The super gravity sorting unit includes an outer sleeve 12, an inner sleeve 11, a drum 10, a rotating shaft 31, a rotating motor 32, and a frequency converter 34. From the inside out, the drum 10, the inner sleeve 11, and the outer sleeve 12 are sequentially nested. The outer sleeve 12 is rotatably connected to the inner sleeve 11, and the inner sleeve 11 is fixedly connected to the drum 10. The rotating motor 32 is fixedly connected to the inner sleeve 11 through the rotating shaft 31. During sorting, the rotating motor 32 is turned on, and the rotating motor 32 drives the drum 10 and the inner sleeve 11 to rotate at high speed relative to the outer sleeve 12.

[0043] Specifically, the structure of the drum 10 is an inverted cone shape, comprising at least two layers of collecting troughs arranged sequentially along the axial direction, with the diameter of the collecting troughs gradually decreasing from top to bottom; the inner wall of the collecting trough includes an upper inclined wall, a vertical wall 1001, and a lower inclined wall 1003, see [reference needed]. Figure 6 The upper inclined wall, vertical wall 1001 and lower inclined wall 1003 are connected from top to bottom to form a trapezoidal structure on the inner wall of the collection trough. The vertical wall 1001 and lower inclined wall 1003 are provided with multiple fluidizing water holes 1002 in the circumferential direction. The space between the drum 10 and the inner sleeve 11 serves as a space for accommodating backflushing fluidizing water. The space is connected to the inner cavity of the drum 10 through the fluidizing water holes 1002 and forms a jet through the fluidizing water holes 1002.

[0044] On the one hand, the magnitude of the centrifugal force experienced by minerals in the supergravity separation unit is related not only to their own properties and the rotational speed of the drum 10, but also to the rotational diameter of the drum 10. Compared with the prior art, the supergravity mineral separation device provided in this embodiment can effectively increase the centrifugal force experienced by minerals in the inner cavity by increasing the diameter of the collection trough, while keeping the minerals' own properties and the rotational speed of the drum 10 unchanged. Since the drum 10 is shaped like an inverted cone, the diameter of the collection trough gradually decreases from top to bottom, which can increase the centrifugal force experienced in the upper collection trough, recover minerals that are easy to mismatch in the separation as much as possible, and improve the recovery rate.

[0045] On the other hand, in the traditional rotary drum 10, the fluidizing water is only supplied from the side. In this embodiment, multiple fluidizing water holes 1002 are opened in the circumferential direction on the vertical wall 1001 and the lower inclined wall 1003 of the collection tank, so as to wash the minerals in the collection tank from multiple directions. This can reduce the dead angle of the fluidizing water in the traditional rotary drum 10, enhance the looseness of the slurry in the separation process, and improve the separation accuracy.

[0046] Considering that the volume of the collection trough affects the separation effect, in order to improve the applicability of the above-mentioned ultragravity mineral processing device, the upper inclined wall and the vertical wall 1001, and the vertical wall 1001 and the lower inclined wall 1003 are all rotatably connected. The ultragravity separation unit also includes a volume adjustment component. See [link to relevant documentation]. Figure 7The volume adjustment assembly includes a tension spring 1004, an upper mounting protrusion 1005, a lower mounting protrusion 1006, and an adjusting rod 1007. One end of the tension spring 1004 is fixedly connected to the upper inclined wall, and the other end is fixedly connected to the lower inclined wall 1003. The upper mounting protrusion 1005 is located on the upper inclined wall, and the lower mounting protrusion 1006 is located on the lower inclined wall 1003. One end of the adjusting rod 1007 is rotatably connected to the lower inclined wall 1003, and the other end of the adjusting rod 1007 passes through the upper inclined wall and extends from the top of the drum 10 to the outside of the drum 10. In this way, by adjusting the length of the adjusting rod 1007, the length of the tension spring 1004 can be adjusted, thereby adjusting the distance between the upper and lower inclined walls 1003 and the volume of the collection trough.

[0047] For different mineral compositions, there are multiple volume adjustment components, each corresponding to a collection trough. The volume of each collection trough can be adjusted using the volume adjustment components.

[0048] To supply water to the containment space, the aforementioned gravity sorting unit also includes a backwashing unit. For example, the backwashing unit includes a water storage tank 22, a backwashing water pump 27, and a backwashing pipe 30 connected in sequence. The outlet of the backwashing pipe 30 is connected to the bottom of the containment space. A backwashing solenoid valve 28 is provided on the connecting pipe between the water storage tank 22 and the backwashing water pump 27. Water from the water storage tank 22 is supplied to the backwashing pipe 30 under the action of the pump 27, and further supplied to the containment space. The water in the containment space forms backwashing water through the fluidizing water holes 1002. The minerals in the drum 10 are sorted under the combined action of centrifugal force and backwashing water.

[0049] Considering that water will be continuously lost during the sorting process, it is necessary to replenish water to the water storage tank 22. Therefore, the backwashing unit also includes a water supply component connected to the water inlet of the water storage tank 22, and a water replenishment solenoid valve 26 is provided on the connecting pipeline between the water storage tank 22 and the water supply component.

[0050] From the perspective of spatial layout, the aforementioned backwash pipe 30 is located in the rotating shaft 31 and is coaxial with the rotating shaft 31.

[0051] To wash the minerals after separation in the rotary drum 10 and improve the unloading effect, the aforementioned high-gravity separation unit also includes a particle washing assembly 9 (e.g., a high-pressure washing assembly), see [link to relevant documentation]. Figure 5 The particle washing component 9 is located in the rotating drum 10 and washes the minerals in the collection tank.

[0052] For example, the flushing assembly includes a particle flushing inlet pipe 902, a particle flushing inlet valve 905, a particle flushing motor 901, and a plurality of annular water pipes 903 arranged along the axial direction of the flushing assembly. The particle flushing inlet pipe 902 is connected to the plurality of annular water pipes 903 respectively. The particle flushing inlet valve 905 is used to control the water supply. The particle flushing motor 901 is used to drive the annular water pipes 903 to rotate. The annular water pipes 903 have flushing water holes 904 on their side walls facing the drum 10. The annular water pipes 903 correspond one-to-one with the collection tank. One annular water pipe 903 is used to flush the minerals in one collection tank in a concentrated manner, thereby further improving the unloading effect.

[0053] To facilitate uniform distribution of the slurry, the above-mentioned gravity separation unit also includes a slurry distributor 29 located at the bottom of the drum 10. For example, the slurry distributor 29 is located directly below the feed pipe 8 and is coaxially arranged with the feed pipe 8.

[0054] It is understandable that in order to realize the feeding, discharging and overflow of the super gravity sorting unit, the super gravity sorting unit also includes a feed pipe 8. The discharge port of the feeding unit is connected to the feed port of the drum 10 (i.e. the upper opening of the drum 10) through the feed pipe 8. An overflow port 13 and a bottom flow port 33 are opened on the outer sleeve 12. The feed pipe 8 passes through the outer sleeve 12, the inner sleeve 11 and the drum 10 in sequence and extends to the lower part of the drum 10. The overflow port 13 is located on the upper part of one side of the outer sleeve 12, and the bottom flow port 33 is located on the lower part of the other side of the outer sleeve 12.

[0055] Specifically, the structure of the feeding unit includes a raw ore slurry tank 3, a stirring assembly 4, and a slurry pump 6. The stirring end of the stirring assembly 4 is located in the raw ore slurry tank 3 and is used to stir the slurry in the raw ore slurry tank 3. The slurry pump 6 is located on the connecting pipeline between the raw ore slurry tank 3 and the rotating drum 10 and is used to provide power to the slurry so that it can be supplied into the rotating drum 10.

[0056] In order to monitor the liquid level and / or slurry concentration in the raw ore slurry tank 3, the above-mentioned feeding unit also includes a feeding level gauge 5 for monitoring the liquid level in the raw ore slurry tank 3 and a feeding concentration gauge 1 for monitoring the concentration in the raw ore slurry tank 3.

[0057] For example, the feed concentration meter 1 and the slurry pump 6 are at the same height, so that the volume concentration of the slurry can be accurately and in real time monitored to obtain the feed volume parameters.

[0058] Understandably, in order to achieve automatic feeding of raw ore slurry, the above-mentioned feeding unit also includes a feeding solenoid valve 7 located on the connecting pipeline between the raw ore slurry tank 3 and the rotating drum 10. The feeding solenoid valve 7 automatically controls the opening and closing of the raw ore slurry tank 3 and the rotating drum 10, thereby achieving automatic feeding of raw ore slurry.

[0059] Similarly, in order to enable the automatic feeding of slurry into the raw ore slurry tank, the above-mentioned feeding unit also includes a slurry supply solenoid valve 2 located on the connecting pipeline between the slurry supply device and the raw ore slurry tank 3. The slurry supply solenoid valve 2 automatically controls the opening and closing of the slurry supply device and the raw ore slurry tank 3, thereby realizing the automatic feeding of slurry into the raw ore slurry pump.

[0060] Based on the specific structures of the feeding unit and the gravity separation unit described above, the gravity separation process is as follows:

[0061] The raw ore slurry is transported to the feed pipe 8 of the supergravity separation unit via the slurry pump 6 and the connecting pipeline. A slurry distributor 29 is located directly below the feed pipe. The slurry is thrown onto the inner wall of the drum 10 by the slurry distributor 29. The water pump 27 is connected to the water storage tank 22 and supplies water to the accommodating space between the drum 10 and the inner sleeve 11 through the backwash pipe 30. The water flow in the accommodating space forms backwash water through the fluidizing water hole 1002 under a certain pressure. The slurry in the drum 10 is separated under the action of centrifugal force and backwash jet. The minerals with lower density form an overflow and flow out from the overflow port 13. The minerals with higher density are deposited in the collection tank. After the separation is completed, the material is unloaded by the high-pressure flushing device and discharged from the bottom outlet 33.

[0062] In order to achieve the recycling of water resources, the above-mentioned supergravity mineral processing device also includes a circulating water unit, which includes a buffer tank 14 connected to the overflow port 13, thereby forming a water circulation loop of water storage tank 22, water pump 27, backwash pipe 30, accommodating space, drum 10, overflow port 13, buffer tank 14 and filter 18.

[0063] To ensure the stable installation of the outer cylinder 1803 and the buffer tank 14, the above-mentioned ultragravity mineral processing device also includes a frame 25, on which both the outer cylinder 1803 and the buffer tank 14 are placed.

[0064] In order to enable automatic discharge from the buffer tank 14 to the filter 18, the above-mentioned circulating water unit also includes a buffer solenoid valve 17 installed on the connecting pipeline between the buffer tank 14 and the filter 18.

[0065] In order to monitor the level and / or concentration of the slurry discharged from the overflow port 13 in real time, the above-mentioned circulating water unit also includes a buffer level gauge 15 for monitoring the level in the buffer tank 14 and / or a buffer concentration gauge 16 for monitoring the concentration of the slurry in the buffer tank 14.

[0066] To achieve intelligent judgment of the end state of ultragravity separation and centralized control of the separation device, the aforementioned ultragravity mineral processing device also includes an intelligent control unit. This intelligent control unit includes an upper-level unit and a controller (e.g., a PLC). The following components are connected to the controller's input terminals: slurry supply solenoid valve 2, feed level gauge 5, feed concentration gauge 1, feed solenoid valve 7, particle flushing motor 901, particle flushing inlet valve 905, buffer level gauge 15, buffer concentration gauge 16, water storage level gauge, buffer solenoid valve 17, double-layer solenoid valve 23, water replenishment solenoid valve 26, backwashing solenoid valve 28, and frequency converter 34. The controller's output terminal is connected to the upper-level computer. Specifically, the slurry supply solenoid valve 2 controls the replenishment of the raw ore slurry tank 3, and the feed level gauge 5 monitors the raw ore slurry level. The liquid level in the ore slurry tank 3 is monitored by a feed concentration meter, the feed solenoid valve 7 controls the feeding of the gravity sorting unit, the particle flushing motor 901 controls the rotation of the particle flushing assembly 9, the particle flushing water inlet valve 905 controls the water supply to the particle flushing water inlet pipe, the buffer level gauge 15 monitors the liquid level in the buffer tank 14, the buffer concentration meter 16 monitors the ore slurry concentration in the buffer tank 14, the water storage level gauge monitors the liquid level in the water storage tank 22, the buffer solenoid valve 17 controls the feeding of the filter 18, the double-layer solenoid valve 23 controls the drainage and discharge of the filter, the water replenishment solenoid valve 26 controls the water replenishment of the water storage tank 22, the backwash solenoid valve 28 controls the water supply pressure of the water pump 27, and the frequency converter 34 is used to control the frequency of the rotating motor 32.

[0067] Based on the structure of the intelligent control unit, the backwash water pressure is controlled by the backwash solenoid valve 28 according to the properties of the raw ore, and the frequency of the rotating motor 32 is adjusted by the frequency converter 34, so as to meet the requirements of different minerals and product quality. For example, if the low-density product in the underflow of the drum 10 is too high, the backwash water pressure is increased or the rotation speed of the rotating motor 32 is reduced; if the high-density product in the overflow of the drum 10 is too high, the backwash water pressure is reduced or the rotation speed of the rotating motor 32 is increased.

[0068] Feed concentration meter 1 collects the feed concentration of raw ore slurry tank 3 and transmits it to the controller. Feed level meter 5 collects the liquid level of raw ore slurry tank 3 before and after feeding and transmits it to the controller. The controller calculates the liquid level difference based on the liquid level of raw ore slurry tank 3 before and after feeding, multiplies it by the cross-sectional area of ​​raw ore slurry tank 3 to calculate the feed volume, and multiplies the feed volume by the feed concentration to calculate the volume of feed minerals (i.e., particles in the slurry). The specific formula is as follows:

[0069] V gw =φ g ×(L gq -L gh )×S g

[0070] Among them, V gwFor the volume of the feed mineral, m 3 ;φ g The feed concentration of raw ore slurry tank 3; L gq The liquid level in raw ore slurry tank 3 before feeding, in meters (m); in liters (L). gh The liquid level after feeding from raw ore slurry tank 3 is in meters (m); S g Let m be the cross-sectional area of ​​the raw ore slurry tank 3. 2 .

[0071] Buffer concentration meter 16 collects the overflow concentration in buffer tank 14 and transmits it to the controller. Buffer level meter 15 collects the overflow level in buffer tank 14 and transmits it to the controller. The controller calculates the overflow mineral volume based on the overflow concentration in buffer tank 14, the overflow level in buffer tank 14, and the cross-sectional area of ​​buffer tank 14. The specific formula is as follows:

[0072] V yw =φ y ×L y ×S y

[0073] Among them, V yw The volume of the overflow mineral is m. 3 ;φ y The overflow concentration in buffer tank 14; L y The overflow level in buffer tank 14 is measured in meters (m); S y Let m be the cross-sectional area of ​​buffer tank 14. 2 .

[0074] Thus, the difference between the feed mineral volume and the overflow mineral volume is the mineral volume in the rotating drum 10. When the mineral volume in the rotating drum 10 equals the volume of the collection trough, the separation is considered complete. By monitoring the feed mineral volume and the overflow mineral volume in real time, the mineral volume in the rotating drum 10 is calculated and compared with the collection trough volume to determine the separation status and effectively identify the end of the separation process. The ultragravity separation unit is linked with the feeding unit and the buffer tank 14 to achieve intelligent control of the ultragravity mineral processing device. This reduces human error, maintains efficient operation of the device, and minimizes mineral mismatch during the separation process, thereby improving separation accuracy and ensuring product quality.

[0075] It should be noted that the volume of the collection trough is fixed for a given gravity sorting device.

[0076] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A sorting device, characterized in that, The system includes a filter and a gravity sorting unit. The gravity sorting unit includes an inner sleeve and a rotating drum. The filter includes a propeller blade, an outer cylinder, and an inner cylinder. The propeller blade is located in the inner cylinder, and the inner cylinder is located in the outer cylinder. The space between the inner cylinder and the outer cylinder serves as a filtrate space. A spiral slit extending along the axial direction of the inner cylinder is formed on the side wall of the inner cylinder. The spiral slit is coaxially arranged with the inner cylinder. A spiral screen covers the spiral slit, allowing the inner cylinder to communicate with the filtrate space through the spiral screen. A discharge port is formed at the bottom of the inner cylinder, and a liquid discharge port is formed at the bottom of the filtrate space. The drum and inner sleeve are sequentially fitted from the inside to the outside. The drum is in the shape of an inverted cone and includes at least two layers of collection troughs arranged sequentially along the axial direction. The diameter of the collection troughs gradually decreases from top to bottom. The inner wall of the collection trough includes an upper inclined wall, a vertical wall, and a lower inclined wall. The upper inclined wall, vertical wall, and lower inclined wall are connected sequentially from top to bottom to form a trapezoidal structure. Multiple fluidizing water holes are opened in the vertical wall and the lower inclined wall along the circumference. The upper inclined wall and the vertical wall, as well as the vertical wall and the lower inclined wall, are rotatably connected. The supergravity sorting unit also includes a capacity adjustment assembly, which includes a tension spring, an upper mounting protrusion, a lower mounting protrusion, and an adjustment rod. One end of the tension spring is fixedly connected to the upper inclined wall, and the other end of the tension spring is fixedly connected to the lower inclined wall. The upper mounting protrusion is located on the upper inclined wall, and the lower mounting protrusion is located on the lower inclined wall. One end of the adjustment rod is rotatably connected to the lower inclined wall, and the other end of the adjustment rod passes through the upper inclined wall and extends from the top of the drum to the outside of the drum.

2. The sorting device according to claim 1, characterized in that, It also includes a spiral brush, which is disposed in the filtrate space and is spiral in shape, corresponding to the position of the spiral screen.

3. The sorting device according to claim 1, characterized in that, It also includes double-layer solenoid valves; The outer layer of the double-layer solenoid valve is connected to the filtrate space and is used to control the discharge of filtrate; The inner layer of the double-layer solenoid valve is connected to the inner cylinder and is used to control the discharge of filter residue.

4. The sorting device according to claim 3, characterized in that, The inner layer of the double-layer solenoid valve is a filter screen with the same aperture as the spiral screen.

5. The sorting device according to claim 1, characterized in that, The distance between the propeller blades and the spiral screen is 0.2~0.5mm.

6. The sorting device according to claim 1, characterized in that, The opening rate of the spiral screen is 15%~20%, and the aperture of the spiral screen is smaller than the minimum particle size of the feed mineral.

7. The sorting apparatus according to any one of claims 1 to 6, characterized in that, It also includes a flow guiding component, which includes a flow guiding base. The flow guiding base has a flow guiding inlet, a first outlet and a second outlet. The flow guiding inlet is connected to the outlet of the inner cylinder and the outlet of the filtrate space. The first outlet is connected to the conveyor belt and the second outlet is connected to the water storage tank.

8. The sorting device according to claim 7, characterized in that, The flow guiding component also includes a flow guiding meter, which is located at the second discharge port.

9. The sorting device according to claim 8, characterized in that, The flow guiding assembly also includes a pivoting baffle, which is pivotally connected to the flow guiding substrate and has a first blocking mode and a second blocking mode. During the filtration process, the pivot baffle is in the first blocking mode, covering the first discharge port, and the discharge port of the filtrate space is connected to the water storage tank through the second discharge port; After filtration, the pivot baffle is in the second blocking mode, covering the second discharge port, and the discharge port of the inner cylinder is connected to the conveyor belt through the first discharge port.

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