Multi-particle-size mineral particle screening system

Abstract

The invention discloses a multi-particle-size mineral particle screening system which comprises a feeding device, a first-stage rotational flow device, a second-stage rotational flow device and a filtering and grading device. The first-stage cyclone device comprises an outer-layer cyclone, an inner-layer cyclone and a first-stage overflow pipe which are sequentially arranged at intervals from outside to inside; the second-stage cyclone device comprises at least two sets of second-stage cyclone units, and each second-stage cyclone unit comprises a second-stage cyclone and a filter; the filtering and grading device comprises a grading box body, a first-stage filtering plate, a second-stage filtering plate and a third-stage filtering plate which are inclined towards the same direction are sequentially arranged in the grading box body from top to bottom, a collecting opening is formed in the lower end of each stage of filtering plate, a discharging opening is formed in the bottom of the grading box body, and the discharging opening is connected with the feeding device through a conveying pipe; and a conveying pump is arranged on the material conveying pipe. According to the system, the multiple pieces of cyclone separation equipment are combined with the filter screen for use, ores with different sizes are discharged respectively, water is separated out, and therefore finer ore classification is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of mineral sorting, and in particular to a multi-size mineral particle screening system. Background Art

[0002] Mineral resources are non-renewable resources. Minerals mined from mines are mixed with water in various particle sizes. It is usually necessary to separate the water and grade the minerals at the same time. Then, the ores of different particle sizes are transported to the most suitable mineral processing process to avoid low mineral processing efficiency due to mixed particle sizes. In addition, the costs of ores of different particle sizes in the subsequent processing process are also different.

[0003] At present, mining operations do not pay enough attention to ore particle classification, and the ore dressing equipment and process are relatively simple. The ore separation efficiency is low, and the separation effect of fine-particle ore is very poor. In the existing technology, a single cyclone or a single screen is used for screening, and the separation is not sufficient. The difference between the bottom flow and the overflow product is not obvious. The overflow separation water usually contains ore with a smaller particle size, and the accuracy of ore classification is relatively low.

[0004] In view of this, it is necessary to improve the existing technology. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-size mineral particle screening system, aiming to solve at least one of the technical problems existing in the above-mentioned prior art. To achieve the above-mentioned purpose, the technical solution adopted is as follows:

[0006] A multi-size mineral particle screening system comprises a feeding device, a primary cyclone device, a secondary cyclone device and a filtering and grading device;

[0007] The primary cyclone device comprises an outer cyclone, an inner cyclone and a primary overflow pipe which are arranged in sequence from outside to inside. The top of the outer cyclone is sealed, and a primary feed port is provided on the side wall. The primary feed port is connected to the feed device, and an outer bottom flow port is provided at the bottom. The top of the inner cyclone is open, and an inner bottom flow port is provided at the bottom. The inner bottom flow port is connected to a primary material pipe. The bottom end of the primary overflow pipe extends into the inner cyclone, and the top end extends from the top of the outer cyclone.

[0008] The secondary cyclone device comprises at least two sets of secondary cyclone units, the secondary cyclone unit comprises a secondary cyclone and a filter, the filter is arranged in the secondary cyclone, a secondary overflow pipe is arranged on the top of the secondary cyclone, the secondary overflow pipe is connected to the filter, a secondary feed port is arranged on the side wall, a secondary underflow port is arranged on the bottom, the top of the primary overflow pipe is connected to each secondary feed port through a shunt pipe, and each secondary underflow port is connected to a secondary material pipe through a collecting pipe;

[0009] The filtering and grading device comprises a grading box, in which a primary filter plate, a secondary filter plate and a tertiary filter plate inclined in the same direction are arranged in sequence from top to bottom. The filter aperture of the lower filter plate is smaller than the filter aperture of the upper filter plate. A collecting port is arranged at the lower end of each filter plate. The outer bottom flow port extends into the grading box and is located at the upper end of the primary filter plate. The primary material pipe extends into the grading box and is located at the upper end of the secondary filter plate. The secondary material pipe extends into the grading box and is located at the upper end of the tertiary filter plate. A discharge port is arranged at the bottom of the grading box, and the discharge port is connected to the feeding device through a feed pipe, and a delivery pump is arranged on the feed pipe.

[0010] Preferably, the feeding device comprises a feeding box, a raw material inlet is provided on the top of the feeding box, a rotatable stirring propeller is arranged inside and driven by an external motor, a feeding pipe is connected to the bottom, and a booster pump is provided on the feeding pipe.

[0011] Preferably, the top wall of the feed box is provided with a plurality of exhaust holes.

[0012] Preferably, the outer cyclone is composed of a cone section, a barrel section and a cone section in sequence from top to bottom, and the two cone sections are gradually narrowed from top to bottom.

[0013] Preferably, the inner cyclone is composed of a barrel section and a cone section from top to bottom, and the cone section is gradually narrowed from top to bottom;

[0014] An outward turning edge is arranged on the top of the barrel section of the inner cyclone, and the outward turning edge is located at the junction of the barrel section of the outer cyclone and the upper cone section of the two cone sections of the outer cyclone.

[0015] Preferably, a spiral cone disk is provided on the section of the primary overflow pipe located within the outer cyclone cone section.

[0016] Preferably, a turntable is provided on the section of the first-stage overflow pipe located in the inner cyclone barrel section, and both the upper and lower surfaces of the turntable are smooth conical surfaces.

[0017] Preferably, the secondary cyclone is composed of a barrel section and a cone section in sequence from top to bottom, and the cone section is gradually narrowed from top to bottom.

[0018] Preferably, the filter is fixedly arranged in the secondary cyclone barrel section, and the filter comprises a shell, a filter cavity is formed inside the shell, and a plurality of filter holes are arranged on the shell.

[0019] Preferably, an inclined first-level collecting slide plate is provided between the first-level filter plate and the second-level filter plate, for collecting materials filtered by the first-level filter plate and sliding into the upper end position of the second-level filter plate;

[0020] An inclined secondary collecting slide plate is provided between the secondary filter plate and the tertiary filter plate to collect materials filtered by the secondary filter plate and slide into the upper end position of the tertiary filter plate.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention discloses a multi-size mineral particle screening system, which adopts a plurality of cyclone separation devices in combination with a filter screen. The cyclone separation devices can perform preliminary separation according to the size difference of the ores, discharge the ores of different sizes respectively, and separate the water to facilitate subsequent processing. Then the filter screen performs particle size classification on the ores of different particle sizes discharged by the cyclone separation devices, thereby achieving more refined ore classification, which not only reduces the processing cost but also meets the needs of different market applications. Through precise classification, resource recycling can be better realized and waste discharge can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the system of the present invention.

[0025] Figure 2 It is a schematic structural diagram of the feeding device of the present invention.

[0026] Figure 3 It is a cross-sectional view of the assembly of the primary cyclone device and the secondary cyclone device of the present invention.

[0027] Figure 4 It is a schematic diagram of the turntable structure of the present invention.

[0028] Figure 5 It is a schematic diagram of the filter structure of the present invention.

[0029] Figure 6 It is a cross-sectional view of the filtering and grading device of the present invention.

[0030] In the figure: 1. Feed box; 2. Raw material inlet; 3. Stirring propeller; 4. Motor; 5. Exhaust hole; 6. Feed pipe; 7. Booster pump; 8. Outer cyclone; 9. Inner cyclone; 10. First-level overflow pipe; 11. Spiral cone; 12. Turntable; 13. Outer bottom flow outlet; 14. Outer edge; 15. Inner bottom flow outlet; 16. First-level material pipe; 17. Smooth cone; 18. Second-level cyclone; 19; Filter; 20. Second-level Overflow pipe; 21, secondary bottom flow outlet; 22, shell; 23, filter hole; 24, diverter pipe; 25, collecting pipe; 26, secondary material pipe; 27, grading box; 28, primary filter plate; 29, secondary filter plate; 30, tertiary filter plate; 31, primary collecting port; 32, secondary collecting port; 33, tertiary collecting port; 34, primary collecting slide plate; 35, secondary collecting slide plate; 36, discharge port; 37, feed pipe; 38, delivery pump. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 1 As shown, a preferred embodiment of the present invention provides a multi-size mineral particle screening system, which includes a feeding device, a primary cyclone device, a secondary cyclone device and a filtering and grading device.

[0034] like Figure 2 As shown, the feeding device includes a feeding box 1, and a raw material inlet 2 is provided on the top of the feeding box 1, and the raw materials to be screened enter the feeding box 1 through the raw material inlet 2. A rotatable stirring propeller 3 is provided inside the feeding box 1, and is driven by an external motor 4 to fully stir the raw materials so that they are mixed evenly. In addition, a plurality of exhaust holes 5 are provided on the top wall of the feeding box 1, and excess gas is discharged through the exhaust holes 5 during the stirring process. A feeding pipe 6 is connected to the bottom of the feeding box 1, and a booster pump 7 is provided on the feeding pipe 6. The feeding pipe 6 is connected to the primary cyclone device, and the fully mixed raw materials are pressurized by the booster pump 7 and input into the primary cyclone device.

[0035] like Figure 3As shown, the primary cyclone device includes an outer cyclone 8, an inner cyclone 9, a primary overflow pipe 10, a spiral cone disk 11 and a rotating disk 12.

[0036] The outer cyclone 8, the inner cyclone 9 and the primary overflow pipe 10 are arranged coaxially and spaced from outside to inside. The outer cyclone 8 is composed of a cone section, a barrel section and a cone section from top to bottom. The two cone sections are gradually narrowed from top to bottom. The top of the upper cone section of the outer cyclone 8 is sealed. The side wall of the upper cone section of the outer cyclone 8 is provided with a primary feed port (not shown in the figure) along the tangent direction. The primary feed port is connected to the feed pipe 6. The raw material enters the outer cyclone 8 through the primary feed port. The outer bottom flow port 13 is provided at the bottom end of the lower cone section of the outer cyclone 8.

[0037] The inner cyclone 9 is composed of a barrel section and a cone section from top to bottom, and the cone section is gradually narrowed from top to bottom. The barrel section of the inner cyclone 9 is located inside the barrel section of the outer cyclone 8, and the cone section of the inner cyclone 9 is located inside the lower cone section of the outer cyclone 8. The top of the barrel section of the inner cyclone 9 is opened, and the opening position is provided with an outward turning edge 14, and the outward turning edge 14 is located at the junction of the barrel section of the outer cyclone 8 and the upper cone section of the outer cyclone 8. The bottom of the cone section of the inner cyclone 9 is provided with an inner bottom flow port 15, and the inner bottom flow port 15 is connected to a primary material pipe 16, and the primary material pipe 16 passes through the outer cyclone 8 outward.

[0038] The bottom end of the first-level overflow pipe 10 extends into the middle section of the inner cyclone 9 , and the top end extends from the top of the outer cyclone 8 .

[0039] The spiral cone disk 11 is spirally arranged on the primary overflow pipe 10, specifically arranged on the section of the primary overflow pipe 10 located in the cone section of the outer cyclone 8. Its function is that the raw material enters the outer cyclone 8 at a certain pressure and speed, flows along the spiral cone disk 11, increases the tangential speed, reduces the axial speed, and promotes the formation of swirl.

[0040] like Figure 4 As shown, the turntable 12 is installed on the primary overflow pipe 10 , specifically arranged on the section of the primary overflow pipe 10 located in the cylinder section of the inner cyclone 9 , and the upper and lower surfaces of the turntable 12 are both smooth conical surfaces 17 .

[0041] When the raw materials enter the outer cyclone 8, the coarser particles with greater centrifugal force will flow downward along the inner wall of the outer cyclone 8 and be discharged through the outer bottom flow port 13. In addition, the coarser particles flow downward at a faster speed, easily impacting the inner wall and rebounding upward, and the outward-turned edge 14 at the top opening of the inner cyclone 9 acts as a barrier.

[0042] The relatively fine particles of raw materials with smaller centrifugal force enter the inner cyclone 9. Due to the blocking effect of the conical surface on the turntable 12, more raw materials enter the outer vortex of the inner cyclone 9. In this way, the relatively fine particles of raw materials in the outer vortex are subjected to smaller centrifugal force, and will form an inner vortex inward and be discharged through the first-level overflow pipe 10. The relatively coarse particles of raw materials in the outer vortex are subjected to larger centrifugal force, and will flow downward along the inner wall of the inner cyclone 9 and be discharged through the first-level material pipe 16. In addition, there will also be relatively coarse particles in the inner vortex, which will return to the outer vortex in the upward process due to the blocking of the lower conical surface of the turntable 12.

[0043] The secondary cyclone device includes at least two sets of secondary cyclone units. In this embodiment, two sets of secondary cyclone units are preferably provided. The secondary cyclone unit includes a secondary cyclone 18 and a filter 19. The secondary cyclone 18 is composed of a barrel section and a cone section from top to bottom. The cone section is gradually narrowed from top to bottom. A secondary overflow pipe 20 is provided at the top of the barrel section of the secondary cyclone 18. A secondary feed port (not shown in the figure) is provided on the side wall of the barrel section of the secondary cyclone 18. A secondary underflow port 21 is provided at the bottom of the cone section of the secondary cyclone 18.

[0044] The filter 19 is fixed in the cylinder section of the secondary cyclone 18. Figure 5 As shown, the filter 19 includes a shell 22 , a filter cavity is formed inside the shell 22 , and a plurality of filter holes 23 are provided on the shell 22 .

[0045] The secondary overflow pipe 20 extends into the filter cavity. The top of the primary overflow pipe 10 is connected to each secondary feed port through a diverter pipe 24 . Each secondary underflow port 21 is connected to a secondary feed pipe 26 through a collecting pipe 25 .

[0046] The relatively fine particles separated by the inner cyclone enter the secondary cyclone through the primary overflow pipe. After being filtered by the filter, the liquid with almost no particles is discharged through the secondary overflow pipe and collected, and the remaining raw materials are discharged through the secondary material pipe.

[0047] like Figure 6 As shown, the filtering and grading device includes a grading box 27, in which a primary filter plate 28, a secondary filter plate 29 and a tertiary filter plate 30 are arranged in sequence from top to bottom in the grading box 27, which are inclined in the same direction. In this embodiment, the three filter plates are lower on the left and higher on the right, and are arranged in parallel. Among them, the aperture of the primary filter plate 28 is larger than the aperture of the secondary filter plate 29, and the aperture of the secondary filter plate 29 is larger than the aperture of the tertiary filter plate 30. A primary collecting port 31 is provided at the lower end of the primary filter plate 28, a secondary collecting port 32 is provided at the lower end of the secondary filter plate 29, and a tertiary collecting port 33 is provided at the lower end of the tertiary filter plate 30.

[0048] A tilted primary collecting slide 34 is provided between the primary filter plate 28 and the secondary filter plate 29 , and the primary collecting slide 34 is higher on the left and lower on the right. A tilted secondary collecting slide 35 is provided between the secondary filter plate 29 and the tertiary filter plate 30 , and the secondary collecting slide 35 is higher on the left and lower on the right, and is parallel to the primary collecting slide 34 .

[0049] The outer bottom flow port 13 extends into the classification box 27 and is located at the upper end of the primary filter plate 28. The coarse particle raw material discharged from the outer bottom flow port 13 enters the primary filter plate 28, is first filtered by the primary filter plate 28, and large particles flow out from the primary collection port 31 to be collected. The material filtered out of the primary filter plate 28 falls on the primary collection slide 34 and slides into the secondary filter plate 29. After filtering by the secondary filter plate 29, larger particles flow out from the secondary collection port 32 to be collected. The material filtered out of the secondary filter plate 29 falls on the secondary collection slide 35 and slides into the tertiary filter plate 30. After filtering by the tertiary filter plate 30, small particles flow out from the tertiary collection port 33 to be collected. The material filtered out of the tertiary filter plate 30 falls into the bottom of the classification box 27.

[0050] The primary material pipe 16 extends into the grading box 27 and is located at the upper end of the secondary filter plate 29. The relatively coarse particle raw material discharged from the primary material pipe 16 enters the secondary filter plate 29. After being filtered by the secondary filter plate 29, larger particles flow out from the secondary collection port 32 and are collected. The material filtered out by the secondary filter plate 29 falls onto the secondary collection slide plate 35 and slides onto the tertiary filter plate 30. After being filtered by the tertiary filter plate 30, small particles flow out from the tertiary collection port 33 and are collected. The material filtered out by the tertiary filter plate 30 falls to the bottom of the grading box 27.

[0051] The secondary material pipe 26 extends into the grading box 27 and is located at the upper end of the tertiary filter plate 30. The remaining raw materials discharged from the secondary material pipe 26 enter the tertiary filter plate 30. After being filtered by the tertiary filter plate 30, small particles flow out from the tertiary collection port 33 and are collected. The materials filtered out by the tertiary filter plate 30 fall into the bottom of the grading box 27.

[0052] A discharge port 36 is provided at the bottom of the grading box 27, and the discharge port 36 is connected to the feed box 1 through a delivery pipe 37. A delivery pump 38 is provided on the delivery pipe 37 to deliver the material at the bottom of the grading box 27, which is almost a liquid without particles, into the feed box 1, thereby diluting the raw materials.

[0053] To sum up, a multi-size mineral particle screening system described in an embodiment of the present invention adopts a plurality of cyclone separation devices in combination with a filter screen. The cyclone separation device can perform preliminary separation according to the size difference of the ore, discharge the ores of different sizes separately, and separate the water to facilitate subsequent processing. Then the filter screen performs particle size classification on the ores of different particle sizes discharged by the cyclone separation device, thereby achieving more refined ore classification, which not only reduces processing costs, but also meets the needs of different market applications. Through precise classification, resource recycling can be better realized and waste emissions can be reduced.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-size mineral particle screening system, characterized in that: It includes a feeding device, a primary cyclone device, a secondary cyclone device and a filtering and grading device; The primary cyclone device comprises an outer cyclone, an inner cyclone and a primary overflow pipe which are arranged in sequence from outside to inside. The top of the outer cyclone is sealed, and a primary feed port is provided on the side wall. The primary feed port is connected to the feed device, and an outer bottom flow port is provided at the bottom. The top of the inner cyclone is open, and an inner bottom flow port is provided at the bottom. The inner bottom flow port is connected to a primary material pipe. The bottom end of the primary overflow pipe extends into the inner cyclone, and the top end extends from the top of the outer cyclone. The secondary cyclone device comprises at least two sets of secondary cyclone units, the secondary cyclone unit comprises a secondary cyclone and a filter, the filter is arranged in the secondary cyclone, a secondary overflow pipe is arranged on the top of the secondary cyclone, the secondary overflow pipe is connected to the filter, a secondary feed port is arranged on the side wall, a secondary underflow port is arranged on the bottom, the top of the primary overflow pipe is connected to each secondary feed port through a shunt pipe, and each secondary underflow port is connected to a secondary material pipe through a collecting pipe; The filtering and grading device comprises a grading box, in which a primary filter plate, a secondary filter plate and a tertiary filter plate inclined in the same direction are arranged in sequence from top to bottom. The filter aperture of the lower filter plate is smaller than the filter aperture of the upper filter plate. A collecting port is arranged at the lower end of each filter plate. The outer bottom flow port extends into the grading box and is located at the upper end of the primary filter plate. The primary material pipe extends into the grading box and is located at the upper end of the secondary filter plate. The secondary material pipe extends into the grading box and is located at the upper end of the tertiary filter plate. A discharge port is arranged at the bottom of the grading box, and the discharge port is connected to the feeding device through a feed pipe, and a delivery pump is arranged on the feed pipe.

2. A multi-size mineral particle screening system according to claim 1, characterized in that: The feeding device comprises a feeding box, the top of which is provided with a raw material inlet, a rotatable stirring propeller is arranged inside and driven by an external motor, a feeding pipe is connected to the bottom, and a booster pump is arranged on the feeding pipe.

3. A multi-size mineral particle screening system according to claim 2, characterized in that: The top wall of the feed box is provided with a plurality of exhaust holes.

4. A multi-size mineral particle screening system according to claim 1, characterized in that: The outer cyclone is composed of a cone section, a barrel section and a cone section in sequence from top to bottom, and the two cone sections are gradually narrowed from top to bottom.

5. A multi-size mineral particle screening system according to claim 4, characterized in that: The inner cyclone is composed of a barrel section and a cone section from top to bottom, and the cone section is gradually narrowed from top to bottom; An outward turning edge is arranged on the top of the barrel section of the inner cyclone, and the outward turning edge is located at the junction of the barrel section of the outer cyclone and the upper cone section of the two cone sections of the outer cyclone.

6. A multi-size mineral particle screening system according to claim 4, characterized in that: A spiral cone disk is provided on the section of the first-stage overflow pipe located inside the cone section of the outer cyclone.

7. A multi-size mineral particle screening system according to claim 5, characterized in that: A turntable is provided on the section of the first-stage overflow pipe located in the inner cyclone cylinder section, and both the upper and lower surfaces of the turntable are smooth conical surfaces.

8. The multi-size mineral particle screening system according to claim 1, characterized in that: The secondary cyclone is composed of a barrel section and a cone section in sequence from top to bottom, and the cone section is gradually narrowed from top to bottom.

9. A multi-size mineral particle screening system according to claim 8, characterized in that: The filter is fixedly arranged in the cylinder section of the secondary cyclone. The filter comprises a shell, a filter cavity is formed inside the shell, and a plurality of filter holes are arranged on the shell.

10. The multi-size mineral particle screening system according to claim 1, characterized in that: An inclined first-stage collecting slide plate is provided between the first-stage filter plate and the second-stage filter plate, which is used to collect the material filtered by the first-stage filter plate and slide into the upper end position of the second-stage filter plate; An inclined secondary collecting slide plate is provided between the secondary filter plate and the tertiary filter plate to collect materials filtered by the secondary filter plate and slide into the upper end position of the tertiary filter plate.

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