A high gravity separation method

Abstract

The application discloses a supergravity separation method, relates to the technical field of gravity separation of fine-grained minerals, and aims to solve the problem of product mismatch and reduced separation precision caused by artificial subjective judgment of shutdown time in the prior art. The method comprises the following steps: feeding raw ore slurry into a raw ore slurry tank; feeding the raw ore slurry in the raw ore slurry tank into a rotating drum through a slurry pump for supergravity separation; making overflow after the separation flow into a buffer tank through an overflow port on the rotating drum; calculating the difference between the volume of the feeding ore in the raw ore slurry tank and the volume of the overflow ore in the buffer tank, that is, the volume of the ore in the rotating drum, and judging whether the volume of the ore in the rotating drum is equal to the volume of the material collecting groove of the rotating drum; and if the volume of the ore in the rotating drum is equal to the volume of the material collecting groove of the rotating drum, it is indicated that the separation is completed, and the rotating drum is stopped for discharging. The application can be used for mineral separation.

Description

Technical Field

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

[0002] Minerals, as important raw materials for the development of modern society, are one of the essential substances upon which human civilization depends.

[0003] As the particle size of minerals decreases, the difference in settling velocity between different density components also decreases. Therefore, a larger settling space and a longer settling time are required. The sorting method based on supergravity technology can generate a force field through centrifugal rotation that causes the particles to accelerate at a much greater rate than gravity, thereby enhancing the density-based stratification of fine-grained minerals.

[0004] In existing high gravity mineral processing equipment, the volume of the drum collection trough is limited, and the timing of shutdown is usually determined by human subjective judgment. However, inappropriate shutdown will cause product mismatch, thereby reducing the sorting accuracy. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide a supergravity sorting method to solve the problem that the use of manual subjective judgment to determine the timing of machine stoppage in the prior art can easily lead to product mismatch and reduced sorting accuracy.

[0006] The objective of this invention is mainly achieved through the following technical solutions:

[0007] This invention provides a supergravity sorting method, comprising the following steps:

[0008] The raw ore slurry is fed into the raw ore slurry tank;

[0009] The raw ore slurry in the raw ore slurry tank is fed into the rotary drum by a slurry pump for ultra-gravity separation;

[0010] The overflow after sorting flows into the buffer tank through the overflow port on the drum;

[0011] The difference between the feed mineral volume in the raw ore slurry tank and the overflow mineral volume in the buffer tank is the mineral volume in the drum. Then, determine whether the mineral volume in the drum is equal to the volume of the drum's collection trough.

[0012] If the volume of minerals in the drum is equal to the volume of the drum's collection trough, then the separation process is complete, and the machine should be stopped for discharge.

[0013] Furthermore, the volume of feed minerals in the raw ore slurry tank is obtained using the following method:

[0014] The feed concentration meter collects the feed concentration of the raw ore slurry tank, and the feed level gauge collects the liquid level of the raw ore slurry tank before and after feeding.

[0015] The volume of feed minerals in the raw ore slurry tank is calculated based on the liquid level before feeding, the liquid level after feeding, and the cross-sectional area of ​​the raw ore slurry tank.

[0016] Furthermore, the formula for calculating the volume of feed minerals in the raw ore slurry tank is as follows:

[0017]

[0018] Among them, V gw For the volume of the feed mineral, m 3 ; The feed concentration of the raw ore slurry tank; L gq The liquid level in meters (m) is the level of the raw ore slurry tank before feeding. gh The liquid level after feeding the raw ore slurry tank, in meters (m); S g The cross-sectional area of ​​the raw ore slurry tank is given in m. 2 .

[0019] Furthermore, the volume of overflow minerals in the buffer tank was obtained using the following method:

[0020] The buffer concentration meter collects the overflow concentration in the buffer tank, and the buffer level meter collects the overflow level in the buffer tank;

[0021] The overflow mineral volume is calculated based on the overflow concentration in the buffer tank, the overflow liquid level in the buffer tank, and the cross-sectional area of ​​the buffer tank.

[0022] Furthermore, the formula for calculating the overflow mineral volume in the buffer tank is as follows:

[0023]

[0024] Among them, V yw The volume of the overflow mineral is m. 3 ; The overflow concentration in the buffer tank; L y The overflow level in the buffer tank is in meters (m); S y Let m be the cross-sectional area of ​​the buffer tank. 2 .

[0025] Furthermore, the hypergravity sorting method employs a hypergravity sorting device;

[0026] The gravity sorting device includes a feeding unit, a gravity sorting unit, a buffer tank, a filter, a water storage tank, a water pump, and a backwashing pipe connected in sequence. The gravity sorting unit includes a rotating drum and a rotating motor for driving the rotating drum. The outlet of the backwashing pipe is connected to the inner cavity of the rotating drum.

[0027] Furthermore, it includes the following steps:

[0028] Step 1: Feed the raw ore slurry into the raw ore slurry tank;

[0029] Step 2: Turn on the water pump and the rotating motor. The backwash water is supplied into the rotating drum through the backwash pipe. The raw ore slurry in the raw ore slurry tank is supplied into the rotating drum for gravity separation.

[0030] Step 3: The overflow after sorting flows into the buffer tank through the overflow port on the drum. The volume of minerals in the drum is calculated based on the volume of the fed minerals and the volume of the overflow minerals. It is then determined whether the volume of minerals in the drum is equal to the volume of the drum's collection trough. If the volume of minerals in the drum is equal to the volume of the drum's collection trough, the sorting is complete. The water pump and the rotating motor are then turned off to stop the sorting.

[0031] Step 4: Unload the minerals from the collection trough of the drum;

[0032] Step 5: Filter the overflow to obtain filtrate and filter residue.

[0033] Furthermore, step 5 is followed by the following steps:

[0034] The filtrate obtained in step 5 is fed into the water storage tank as the backwash water in step 2.

[0035] Furthermore, the filter is connected to the water storage tank via a flow guide assembly;

[0036] The flow guiding assembly includes a flow guiding base and a pivoting baffle. The flow guiding base has a flow guiding inlet, a first outlet and a second outlet. The pivoting baffle is pivotally connected to the flow guiding base.

[0037] Furthermore, during the filtration process, the pivot baffle covers the first discharge port, and the filter discharge port is connected to the water storage tank through the second discharge port;

[0038] After filtration, the pivot baffle covers the second discharge port, and the filter discharge port is connected to the conveyor belt through the first discharge port for unloading and transportation.

[0039] Compared with the prior art, the present invention can achieve at least the following beneficial effects:

[0040] The ultragravity separation method provided by this invention calculates the mineral volume in the drum by real-time monitoring of the feed mineral volume and overflow mineral volume, and compares it with the volume of the collection trough to determine the separation status and effectively determine the end state of separation. The drum is linked with the raw ore slurry tank and the buffer tank to achieve intelligent control of ultragravity separation, which can reduce human error, maintain the efficient operation of the device, reduce the mismatch of minerals in the separation process, thereby improving the separation accuracy and ensuring product quality.

[0041] 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

[0042] 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.

[0043] Figure 1 This is a schematic diagram of the sorting device used in the hypergravity sorting method provided in Embodiment 1 of the present invention;

[0044] Figure 2 This is a schematic diagram of the particle washing component in the supergravity sorting method provided in Embodiment 1 of the present invention;

[0045] Figure 3 This is a schematic diagram of the material collection trough in the supergravity sorting method provided in Embodiment 1 of the present invention;

[0046] Figure 4 This is a schematic diagram of the filter structure in the hypergravity sorting method provided in Embodiment 1 of the present invention;

[0047] Figure 5 This is a schematic diagram of the inner cylinder structure of the filter in the supergravity sorting method provided in Embodiment 1 of the present invention;

[0048] Figure 6 This is a schematic diagram of the flow guiding component in the supergravity sorting method provided in Embodiment 1 of the present invention;

[0049] Figure 7 This is a schematic diagram of the volume adjustment component in the supergravity sorting method provided in Embodiment 1 of the present invention;

[0050] Figure 8 This is a flowchart of the supergravity sorting method provided in Embodiment 1 of the present invention.

[0051] Figure label:

[0052] 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

[0053] 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.

[0054] Example 1

[0055] This embodiment provides a supergravity sorting method. See [link to relevant documentation]. Figure 8 It includes the following steps:

[0056] The raw ore slurry is fed into the raw ore slurry tank 3;

[0057] The raw ore slurry in the raw ore slurry tank 3 is fed into the rotary drum 10 through the slurry pump 6 for ultra-gravity separation;

[0058] The overflow after sorting flows into the buffer tank 14 through the overflow port 13 on the drum 10;

[0059] The difference between the feed mineral volume in the raw ore slurry tank 3 and the overflow mineral volume in the buffer tank 14 is the mineral volume in the drum 10. It is then determined whether the mineral volume in the drum 10 is equal to the volume of the drum's collection trough.

[0060] If the volume of minerals in drum 10 is equal to the volume of the drum's collection trough, then the separation process is complete, and the machine should be stopped for discharge.

[0061] Compared with existing technologies, the ultragravity separation method provided in this embodiment calculates the mineral volume in the drum 10 by real-time monitoring of the feed mineral volume and overflow mineral volume, and compares it with the volume of the collection trough to determine the separation status and effectively determine the end state of separation. The drum 10 is linked with the raw ore slurry tank 3 and the buffer tank 14 to achieve intelligent control of ultragravity separation, which can reduce human error, maintain the efficient operation of the device, reduce the mismatch of minerals in the separation process, thereby improving the separation accuracy and ensuring product quality.

[0062] Specifically, the feed mineral volume in the raw ore slurry tank 3 is obtained using the following method:

[0063] The feed concentration meter 1 collects the feed concentration of the raw ore slurry tank 3, and the feed level meter 5 collects the liquid level of the raw ore slurry tank 3 before feeding and the liquid level of the raw ore slurry tank 3 after feeding, respectively.

[0064] Based on the liquid level in the raw ore slurry tank 3 before feeding, the liquid level in the raw ore slurry tank 3 after feeding, and the cross-sectional area of ​​the raw ore slurry tank 3, the volume of the feed mineral in the raw ore slurry tank 3 is calculated. The specific formula is as follows:

[0065]

[0066] Among them, V gw For the volume of the feed mineral, m 3 ; 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 .

[0067] Specifically, the overflow mineral volume in the buffer tank 14 was obtained using the following method:

[0068] Buffer concentration meter 16 collects the overflow concentration in buffer tank 14, and buffer level meter 15 collects the overflow level in buffer tank 14;

[0069] The overflow mineral volume is calculated based on the overflow concentration in buffer tank 14, the overflow liquid level in buffer tank 14, and the cross-sectional area of ​​buffer tank 14. The specific formula is as follows:

[0070]

[0071] Among them, V yw The volume of the overflow mineral is m. 3 ; The overflow concentration in buffer tank 14; L yThe 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 .

[0072] It should be noted that the volume of the collection trough is fixed for a given gravity sorting device.

[0073] For example, the above-mentioned supergravity sorting method employs a supergravity sorting device with the following structure: the supergravity sorting device includes a feeding unit and a supergravity sorting unit; the supergravity sorting unit includes an outer sleeve 12, an inner sleeve 11, a rotating drum 10, a rotating shaft 31, and a rotating motor 32. (See also...) Figure 1 The drum 10, inner sleeve 11 and outer sleeve 12 are sequentially arranged from the inside to the outside. 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 cylinder 1806 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.

[0074] 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 3 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.

[0075] 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 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 shape of the drum 10 is 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.

[0076] 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.

[0077] Considering that the volume of the collection trough affects the sorting effect, in order to improve the applicability of the above-mentioned supergravity sorting 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 supergravity sorting unit also includes a volume adjustment component, see [link to relevant documentation]. Figure 7 The 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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 2 The particle washing component 9 is located in the rotating drum 10 and washes the minerals in the collection tank.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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 between the slurry supply device and the raw ore slurry tank 3, thereby enabling the automatic feeding of slurry into the raw ore slurry pump.

[0091] Based on the specific structures of the feeding unit and the gravity separation unit described above, the gravity separation process is as follows:

[0092] 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.

[0093] In order to achieve the recycling of water resources, the above-mentioned gravity sorting device also includes a circulating water unit. The circulating water unit includes a buffer tank 14 and a filter 18 connected in sequence to the overflow port 13. The outlet of the filter 18 is connected to the water storage tank 22, 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.

[0094] To ensure the stable installation of the outer cylinder 1803 and the buffer tank 14, the above-mentioned gravity sorting device also includes a frame 25, on which the outer cylinder 1803 and the buffer tank 14 are placed.

[0095] 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.

[0096] 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.

[0097] For the structure of filter 18, see, for example, [reference needed]. Figures 4 to 5 The filter 18 is cylindrical 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. 1806 is located inside 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 of the inner cylinder 1806, and a liquid discharge port is opened at the bottom of the filtrate space. 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] To facilitate product collection, obtain overflow mineral volume, and recycle water resources, the aforementioned water recycling unit also includes a flow guiding component 20, see [link to relevant documentation]. Figure 6 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 filter 18 and is located below the outlet of the filter 18. 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.

[0102] To enable 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 base 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 discharge port of the filter 18 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 filter 18 is connected to the conveyor belt 21 through the first discharge port 2001 for unloading and transportation.

[0103] To achieve intelligent judgment of the end state of the ultragravity separation and centralized control of the separation device, the aforementioned ultragravity separation 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 unit. 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.

[0104] 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.

[0105] Based on the above-described structure, the hypergravity sorting device, specifically, the hypergravity sorting method of this embodiment includes the following steps:

[0106] Step 1: Feed the raw ore slurry into the raw ore slurry tank 3;

[0107] Step 2: Turn on the water pump 27, rotate the motor 32 and the stirring component 4. After the backwash water pressure and the concentration of the raw ore slurry stabilize, turn on the slurry pump 6. The raw ore slurry in the raw ore slurry tank 3 is supplied into the rotating drum 10 through the slurry pump 6 for ultra-gravity separation.

[0108] Step 3: The feed concentration meter collects the feed concentration of the raw ore slurry tank 3 and transmits it to the controller. The feed level gauge 5 collects the liquid level of the raw ore slurry tank 3 before feeding and the liquid level of the raw ore slurry tank 3 after feeding and transmits it to the controller. The controller calculates the liquid level difference based on the liquid level of the raw ore slurry tank 3 before feeding and the liquid level of the raw ore slurry tank 3 after feeding, and multiplies it by the cross-sectional area of ​​the raw ore slurry tank 3 to calculate the feed mineral volume.

[0109] The buffer concentration meter 16 collects the overflow concentration in the buffer tank 14 and transmits it to the controller. The buffer level meter 15 collects the overflow level in the buffer tank 14 and transmits it to the controller. The controller calculates the overflow mineral volume based on the overflow concentration in the buffer tank 14, the overflow level height in the buffer tank 14, and the cross-sectional area of ​​the buffer tank 14.

[0110] The difference between the feed mineral volume and the overflow mineral volume is the mineral volume in the drum 10. When the mineral volume in the drum 10 is equal to the collection trough volume, it indicates that the separation is over. The water pump 27, the rotating motor 32 and the stirring assembly 4 are turned off to stop the separation.

[0111] Step 3: Turn on the particle flushing motor 901, and feed flushing water into the drum 10 in sequence through the particle flushing water inlet pipe 902, the annular water pipe 903 and the flushing water hole 904 to unload the minerals in the collection trough of the drum 10.

[0112] Step 4: Open the buffer solenoid valve 17, the filter motor 1801 in the filter 18, and the outer layer of the double-layer solenoid valve 23 for filtration;

[0113] Step 5: Monitor the flow rate of the filtrate at the second outlet 2002 using the flow meter 24 to determine whether filtration is complete. If filtration is complete, open the inner layer of the double-layer solenoid valve 23 to discharge the filtrate.

[0114] In order to achieve water circulation, the following steps are included after step 5 above:

[0115] The filtrate obtained in step 5 is fed into the water storage tank 22 as the backwash water in step 2.

[0116] 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 high gravity separation method characterised in that, The method comprises the following steps: The raw ore slurry is supplied into a raw ore slurry tank; The raw ore slurry in the raw ore slurry tank is supplied into a rotating drum through a slurry pump for hypergravity separation; The overflow after the separation is supplied into a buffer tank through an overflow port on the rotating drum; The difference between the volume of the feed ore in the raw ore slurry tank and the volume of the overflow ore in the buffer tank is the volume of the ore in the rotating drum, and it is determined whether the volume of the ore in the rotating drum is equal to the volume of the material collecting groove in the rotating drum; If the volume of the ore in the rotating drum is equal to the volume of the material collecting groove in the rotating drum, it is determined that the separation is completed, and the machine is stopped for discharging.

2. The supergravity separation method of claim 1, wherein, The volume of the feed ore in the raw ore slurry tank is obtained by the following method: The feed concentration of the raw ore slurry tank is collected by a feed concentration meter, and the liquid level before the raw ore slurry tank is fed and the liquid level after the raw ore slurry tank is fed are collected by a feed liquid level meter; The volume of the feed ore in the raw ore slurry tank is calculated according to the liquid level before the raw ore slurry tank is fed, the liquid level after the raw ore slurry tank is fed, and the cross-sectional area of the raw ore slurry tank.

3. The high gravity separation method according to claim 2, characterized in that, The calculation formula of the volume of the feed ore in the raw ore slurry tank is as follows: V gw = φ g × (L gq - L gh ) × S g where V gw is the volume of the feed mineral body, m 3 ; φ g is the feed concentration of the run-of-mine slurry tank; L gq is the liquid level before the feed of the run-of-mine slurry tank, m; L gh is the liquid level after the feed of the run-of-mine slurry tank, m; S g is the cross-sectional area of the run-of-mine slurry tank, m 2 .

4. The supergravity separation method of claim 1, wherein, The volume of the overflow ore in the buffer tank is obtained by the following method: The overflow concentration in the buffer tank is collected by a buffer concentration meter, and the overflow liquid level in the buffer tank is collected by a buffer liquid level meter; The volume of the overflow ore is calculated according to the overflow concentration in the buffer tank, the overflow liquid level height in the buffer tank, and the cross-sectional area of the buffer tank.

5. The high gravity separation method according to claim 4, characterized in that, The calculation formula of the volume of the overflow ore in the buffer tank is as follows: V yw = φ y x L y x S y where V yw is the volume of the overflow mineral, m 3 ; φ y is the overflow concentration in the buffer tank; L y is the overflow level in the buffer tank, m; S y is the cross-sectional area of the buffer tank, m 2 .

6. The high gravity separation method according to any one of claims 1 to 5, characterized in that, The hypergravity separation method uses a hypergravity separation device; The hypergravity separation device comprises a feed unit, a hypergravity separation unit, a buffer tank, a filter, a water storage tank, a water pump, and a backwashing pipeline connected in sequence, the hypergravity separation unit comprises a rotating drum and a rotating motor for driving the rotating drum to rotate, and the water outlet of the backwashing pipeline is connected with the inner cavity of the rotating drum.

7. The high gravity separation method according to claim 6, characterized in that, The method comprises the following steps: Step 1: supplying the raw ore slurry into the raw ore slurry tank; Step 2: opening the water pump and the rotating motor, supplying the backwashing water into the rotating drum through the backwashing pipeline, supplying the raw ore slurry in the raw ore slurry tank into the rotating drum, and performing hypergravity separation; Step 3: supplying the overflow after the separation into the buffer tank through the overflow port on the rotating drum, calculating the volume of the ore in the rotating drum according to the volume of the feed ore and the volume of the overflow ore, and determining whether the volume of the ore in the rotating drum is equal to the volume of the material collecting groove in the rotating drum; if the volume of the ore in the rotating drum is equal to the volume of the material collecting groove in the rotating drum, it is determined that the separation is completed, the water pump and the rotating motor are closed, and the separation is stopped; Step 4: discharging the ore in the material collecting groove of the rotating drum; Step 5: filtering the overflow to obtain filtrate and filter residue.

8. The high gravity separation method according to claim 7, characterized in that, The method further comprises the following steps after step 5: The filtrate obtained in step 5 is supplied into the water storage tank as the backwashing water in step 2.

9. The high gravity separation method according to claim 8, characterized in that, The filter is connected with the water storage tank through a flow guide assembly; The flow guide assembly comprises a flow guide base body and a pivoting baffle, the flow guide base body is provided with a flow guide inlet, a first outlet, and a second outlet, and the pivoting baffle is pivotally connected with the flow guide base body.

10. The high gravity separation method according to claim 9, characterized in that, During the filtration process, the pivoting baffle covers the first outlet, and the outlet of the filter is connected with the water storage tank through the second outlet. After the filtering is finished, the pivot baffle covers the second discharge port, and the discharge port of the filter is connected with the conveying belt through the first discharge port for discharging and conveying.

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