A multi-size mineral particle screening system

Abstract

The application discloses a multi-particle-size mineral particle screening system, which comprises 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 secondary cyclone device comprises at least two sets of secondary cyclone units, and each secondary cyclone unit comprises a secondary cyclone and a filter. The filtering and grading device comprises a grading box, and the grading box is provided with a primary filter plate, a secondary filter plate and a tertiary filter plate which are inclined in the same direction from top to bottom. The lower end of each filter plate is provided with a collecting port, and the bottom of the grading box is provided with a discharge port. The discharge port is connected with the feeding device through a conveying pipe, and a conveying pump is arranged on the conveying pipe. The system uses multiple cyclone separation devices and filter screens in combination to discharge different sizes of ores and separate water, so that more fine ore grading is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mineral separation, in particular to a multi-particle-size mineral particle screening system. BACKGROUND

[0002] Mineral resources are non-renewable resources. Various particle sizes of minerals extracted from a mine are mixed with water. The water is usually separated, and the minerals are classified. Then, the minerals of different particle sizes are transported to the most suitable beneficiation process to avoid low beneficiation efficiency caused by mixed particle sizes. In addition, the costs of minerals of different particle sizes are different in subsequent processing.

[0003] At present, mining operations do not pay enough attention to the classification of ore particles, and the beneficiation equipment and process are relatively simple. The separation efficiency of the ore is low, and the separation effect of fine particle ore is poor. In the prior art, a single cyclone or a single screen is used for screening. The separation is not sufficient, the difference between the underflow and the overflow product is not obvious, and the overflow separated water usually contains small particle size ore. In addition, the precision of the ore classification is low.

[0004] Therefore, it is necessary to improve the prior art. SUMMARY

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

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

[0007] The primary cyclone device comprises an outer cyclone, an inner cyclone, and a primary overflow pipe arranged in sequence from outside to inside at intervals. The outer cyclone is sealed at the top, and a primary feeding port is arranged on the side wall. The primary feeding port is connected to the feeding device. The bottom of the outer cyclone is provided with an outer underflow port. The inner cyclone is open at the top, and the bottom is provided with an inner underflow port. The inner underflow 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 out of the top of the outer cyclone.

[0008] The secondary cyclone device comprises at least two sets of secondary cyclone units. Each secondary cyclone unit comprises a secondary cyclone and a filter. The filter is arranged in the secondary cyclone. The secondary cyclone is provided with a secondary overflow pipe at the top, and the secondary overflow pipe is connected to the filter. The side wall is provided with a secondary feeding port, and the bottom is provided with a secondary underflow port. The top end of the primary overflow pipe is connected to each secondary feeding port through a distribution pipe. Each secondary underflow port is connected to a secondary material pipe through a collection pipe.

[0009] The filtering and grading device comprises a grading box, wherein a first-stage filter plate, a second-stage filter plate and a third-stage filter plate are sequentially arranged from top to bottom in the grading box and are inclined in the same direction, the filter hole diameter of a lower-stage filter plate is smaller than that of an upper-stage filter plate, a collecting port is arranged at the lower end of each stage filter plate, an outer layer underflow port extends into the grading box and is located at the upper end of the first-stage filter plate, a first-stage material pipe extends into the grading box and is located at the upper end of the second-stage filter plate, a second-stage material pipe extends into the grading box and is located at the upper end of the third-stage filter plate, a discharge port is arranged at the bottom of the grading box, the discharge port is connected with a feeding device through a material conveying pipe, and a conveying pump is arranged on the material conveying pipe.

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

[0011] Preferably, a plurality of exhaust holes are arranged on the top wall of the feeding box.

[0012] Preferably, the outer layer cyclone is sequentially composed of a cone section, a cylinder section and a cone section from top to bottom, and the two cone sections are gradually tapered from top to bottom.

[0013] Preferably, the inner layer cyclone is sequentially composed of a cylinder section and a cone section from top to bottom, and the cone section is gradually tapered from top to bottom.

[0014] The cylinder section of the inner layer cyclone is outwardly turned at the top, and the outward turning edge is located at the joint between the cylinder section of the outer layer cyclone and the upper cone section of the two cone sections of the outer layer cyclone.

[0015] Preferably, a spiral cone disc is arranged on the section of the first-stage overflow pipe located in the cone section of the outer layer cyclone.

[0016] Preferably, a rotating disc is arranged on the section of the first-stage overflow pipe located in the cylinder section of the inner layer cyclone, and the upper and lower surfaces of the rotating disc are smooth cone surfaces.

[0017] Preferably, the second-stage cyclone is sequentially composed of a cylinder section and a cone section from top to bottom, and the cone section is gradually tapered from top to bottom.

[0018] Preferably, the filter is fixed in the cylinder section of the second-stage cyclone, the filter comprises a shell, a filter cavity is formed in the shell, and a plurality of filter holes are arranged on the shell.

[0019] Preferably, a first-stage collecting slide plate is arranged between the first-stage filter plate and the second-stage filter plate and is inclined, which is used for collecting the material filtered by the first-stage filter plate and sliding into the upper end of the second-stage filter plate.

[0020] A second-stage collecting slide plate is arranged between the second-stage filter plate and the third-stage filter plate and is inclined, which is used for collecting the material filtered by the second-stage filter plate and sliding into the upper end of the third-stage filter plate.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] The present application is a multi-particle size mineral particle screening system, which uses multiple cyclone separation devices in combination with a filter screen. The cyclone separation devices can preliminarily separate minerals of different sizes according to their size differences, discharge minerals of different sizes respectively, and separate water, which facilitates subsequent processing. Then the filter screen classifies the minerals of different sizes discharged by the cyclone separation devices according to their particle sizes, so as to realize more precise mineral classification. This not only reduces processing costs, but also meets the needs of different market applications. Through accurate classification, resource recycling and utilization can be better realized, and waste emissions can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

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

[0025] Figure 2 is a schematic diagram of the structure of the feeding device of the present application.

[0026] Figure 3 is an assembly sectional view of the first-stage cyclone device and the second-stage cyclone device of the present application.

[0027] Figure 4 is a schematic diagram of the structure of the rotating disc of the present application.

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

[0029] Figure 6 is a sectional view of the filtering and classifying device of the present application.

[0030] Figure: 1, feed tank; 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 overflow pipe; 11, spiral cone disc; 12, rotating disc; 13, outer underflow port; 14, outer turning edge; 15, inner underflow port; 16, first material pipe; 17, smooth cone surface; 18, second cyclone; 19, filter; 20, second overflow pipe; 21, second underflow port; 22, shell; 23, filter hole; 24, distribution pipe; 25, collection pipe; 26, second material pipe; 27, classification tank; 28, first filter plate; 29, second filter plate; 30, third filter plate; 31, first collection port; 32, second collection port; 33, third collection port; 34, first collection slide plate; 35, second collection slide plate; 36, discharge port; 37, conveying pipe; 38, conveying pump. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings in the embodiments of the present application.

[0032] In the description of the present application, it should be noted that unless explicitly defined and limited, the terms "mounting", "connection", "connecting", "fixing" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] As shown in Figure 1 , the preferred embodiment of the present application provides a multi-particle-size mineral particle screening system, which comprises a feeding device, a first cyclone device, a second cyclone device and a filtering and classifying device.

[0034] As shown in Figure 2 , the feeding device comprises a feed tank 1, and the top of the feed tank 1 is provided with a raw material inlet 2, through which the raw material to be screened enters the feed tank 1. A rotatable stirring propeller 3 is arranged inside the feed tank 1 and is driven by an external motor 4 to fully stir the raw material and make it uniformly mixed. In addition, the top wall of the feed tank 1 is provided with a plurality of exhaust holes 5, through which the excess gas is discharged during the stirring process. The bottom of the feed tank 1 is connected with a feed pipe 6, and the feed pipe 6 is provided with a booster pump 7. The feed pipe 6 is connected with the first cyclone device, and the fully mixed raw material is input into the first cyclone device through the booster pump 7.

[0035] As shown in Figure 3As shown, the first-stage cyclone device includes an outer cyclone separator 8, an inner cyclone separator 9, a first-stage overflow pipe 10, a spiral cone disk 11, and a turntable 12.

[0036] The outer hydrocyclone 8, inner hydrocyclone 9, and primary overflow pipe 10 are arranged coaxially and spaced apart from the outside to the inside. The outer hydrocyclone 8 consists of a conical section, a cylindrical section, and another conical section from top to bottom. Both conical sections gradually narrow from top to bottom. The top of the upper conical section of the outer hydrocyclone 8 is sealed. A primary feed inlet (not shown in the figure) is provided tangentially on the side wall of the upper conical section of the outer hydrocyclone 8. The primary feed inlet is connected to the feed pipe 6, and the raw material enters the outer hydrocyclone 8 through the primary feed inlet. An outer underflow outlet 13 is provided at the bottom of the lower conical section of the outer hydrocyclone 8.

[0037] The inner hydrocyclone 9 consists of a cylindrical section and a conical section from top to bottom, with the conical section gradually narrowing from top to bottom. The cylindrical section of the inner hydrocyclone 9 is located inside the cylindrical section of the outer hydrocyclone 8, and the conical section of the inner hydrocyclone 9 is located inside the lower conical section of the outer hydrocyclone 8. The top of the cylindrical section of the inner hydrocyclone 9 is open, and an outward-curved edge 14 is provided at this opening. This outward-curved edge 14 is located at the junction of the cylindrical section and the upper conical section of the outer hydrocyclone 8. The bottom of the conical section of the inner hydrocyclone 9 is provided with an inner bottom flow port 15, which is connected to a primary feed pipe 16, which extends outward through the outer hydrocyclone 8.

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

[0039] The spiral cone disk 11 is spirally arranged on the primary overflow pipe 10, specifically in the section of the primary overflow pipe 10 located within the cone section of the outer hydrocyclone 8. Its function is to allow the raw material to enter the outer hydrocyclone 8 at a certain pressure and velocity, flow along the spiral cone disk 11, increase the tangential velocity, reduce the axial velocity, and promote the formation of vortices.

[0040] like Figure 4 As shown, the turntable 12 is installed on the first-stage overflow pipe 10, specifically in the section of the first-stage overflow pipe 10 located within the inner layer hydrocyclone 9 cylinder section. Both the upper and lower surfaces of the turntable 12 are smooth conical surfaces 17.

[0041] When the raw material enters the outer hydrocyclone 8, the coarser particles, which are subject to greater centrifugal force, will flow downward along the inner wall of the outer hydrocyclone 8 and be discharged through the outer bottom outlet 13. In addition, the coarser particles flow downward at a faster speed, making them more likely to impact the inner wall and bounce upward. The outward-curved edge 14 at the top opening of the inner hydrocyclone 9 acts as a barrier.

[0042] Finer particles, subjected to less centrifugal force, enter the inner hydrocyclone 9. Due to the obstruction of the conical surface on the rotating disk 12, more material enters the outer vortex of the inner hydrocyclone 9. Thus, the relatively finer particles in the outer vortex experience less centrifugal force and form an inner vortex, which is then discharged through the primary overflow pipe 10. The relatively coarser particles in the outer vortex experience greater centrifugal force and flow downwards along the inner wall of the inner hydrocyclone 9, being discharged through the primary feed pipe 16. Additionally, relatively coarser particles may also exist in the inner vortex; during their upward movement, the obstruction of the lower conical surface of the rotating disk 12 causes them to return to the outer vortex.

[0043] The secondary cyclone device includes at least two sets of secondary cyclone units, and 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 cylindrical section and a conical section from top to bottom. The conical section is gradually narrowed from top to bottom. A secondary overflow pipe 20 is provided at the top of the cylindrical section of the secondary cyclone 18, a secondary feed inlet (not shown in the figure) is provided on the side wall of the cylindrical section of the secondary cyclone 18, and a secondary underflow outlet 21 is provided at the bottom of the conical section of the secondary cyclone 18.

[0044] Filter 19 is fixed inside the cylindrical section of the secondary cyclone separator 18, such as Figure 5 As shown, the filter 19 includes a housing 22, with a filter chamber formed inside the housing 22, and a plurality of filter holes 23 provided on the housing 22.

[0045] The secondary overflow pipe 20 extends into the filter chamber. The top of the primary overflow pipe 10 is connected to each secondary feed port through the diversion pipe 24. Each secondary underflow port 21 is connected to the secondary material pipe 26 through the collection pipe 25.

[0046] The relatively fine particles separated by the inner hydrocyclone enter the secondary hydrocyclone through the primary overflow pipe. After being filtered by the filter, the almost particle-free liquid is discharged and collected through the secondary overflow pipe, while the remaining raw material is discharged through the secondary feed pipe.

[0047] like Figure 6 As shown, the filtration and grading device includes a grading box 27. Inside the grading box 27, a primary filter plate 28, a secondary filter plate 29, and a tertiary filter plate 30 are arranged sequentially from top to bottom, all tilted in the same direction. In this embodiment, all three filter plates are arranged in parallel, with the left side lower than the right. The pore size of the primary filter plate 28 is larger than that of the secondary filter plate 29, and the pore size of the secondary filter plate 29 is larger than that of the tertiary filter plate 30. A primary collection port 31 is located at the lower end of the primary filter plate 28, a secondary collection port 32 is located at the lower end of the secondary filter plate 29, and a tertiary collection port 33 is located at the lower end of the tertiary filter plate 30.

[0048] A first collecting slide 34 is arranged obliquely between the first filter plate 28 and the second filter plate 29, the first collecting slide 34 is arranged with the left end higher than the right end, a second collecting slide 35 is arranged obliquely between the second filter plate 29 and the third filter plate 30, the second collecting slide 35 is arranged with the left end higher than the right end and is parallel to the first 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 first filter plate 28. The relatively coarse particle raw material discharged from the outer bottom flow port 13 enters the first filter plate 28, first passes through the filtering of the first filter plate 28, the large particles flow out of the first collecting port 31 and are collected, the material filtered out of the first filter plate 28 falls on the first collecting slide 34 and slides into the second filter plate 29, passes through the filtering of the second filter plate 29, the relatively large particles flow out of the second collecting port 32 and are collected, the material filtered out of the second filter plate 29 falls on the second collecting slide 35 and slides into the third filter plate 30, passes through the filtering of the third filter plate 30, the small particles flow out of the third collecting port 33 and are collected, and the material filtered out of the third filter plate 30 falls at the bottom of the classification box 27.

[0050] The first material pipe 16 extends into the classification box 27 and is located at the upper end of the second filter plate 29. The relatively coarse particle raw material discharged from the first material pipe 16 enters the second filter plate 29, passes through the filtering of the second filter plate 29, the relatively large particles flow out of the second collecting port 32 and are collected, the material filtered out of the second filter plate 29 falls on the second collecting slide 35 and slides into the third filter plate 30, passes through the filtering of the third filter plate 30, the small particles flow out of the third collecting port 33 and are collected, and the material filtered out of the third filter plate 30 falls at the bottom of the classification box 27.

[0051] The second material pipe 26 extends into the classification box 27 and is located at the upper end of the third filter plate 30. The remaining raw material discharged from the second material pipe 26 enters the third filter plate 30, passes through the filtering of the third filter plate 30, the small particles flow out of the third collecting port 33 and are collected, and the material filtered out of the third filter plate 30 falls at the bottom of the classification box 27.

[0052] The bottom of the classification box 27 is provided with a discharge port 36, the discharge port 36 is connected with the feeding box 1 through a material conveying pipe 37, the material conveying pipe 37 is provided with a conveying pump 38, the material at the bottom of the classification box 27, almost liquid without particles, is sent into the feeding box 1, which plays a dilution role on the raw material.

[0053] To sum up, the multi-particle-size mineral particle screening system has the advantages that the multiple cyclone separation devices are combined with the filter screen, the cyclone separation devices can preliminarily separate the ores according to the size difference, the ores of different sizes are discharged respectively, the water is separated out, subsequent processing is facilitated, then the filter screen classifies the ores of different sizes discharged by the cyclone separation devices, finer ore classification is realized, the processing cost is reduced, the demand of different market applications can be met, resource recycling can be better realized through accurate classification, and the discharge of waste is reduced.

[0054] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A multi-size mineral particle screening system, comprising: The application relates to a feeding device, a primary cyclone device, a secondary cyclone device and a filtering and grading device. The primary cyclone device comprises an outer layer cyclone, an inner layer cyclone and a primary overflow pipe which are sequentially and spacedly arranged from outside to inside; the top of the outer layer cyclone is sealed, the side wall is provided with a primary feeding port which is connected with the feeding device, and the bottom is provided with an outer layer underflow port; the top of the inner layer cyclone is open, the bottom is provided with an inner layer underflow port which is connected with a primary material pipe; the bottom end of the primary overflow pipe extends into the inner layer cyclone, and the top end extends out of the top of the outer layer cyclone. The outer layer cyclone is sequentially composed of a cone section, a cylinder section and a cone section from top to bottom, and the two cone sections are gradually tapered from top to bottom. The inner layer cyclone is sequentially composed of a cylinder section and a cone section from top to bottom, and the cone section is gradually tapered from top to bottom. The top of the cylinder section of the inner layer cyclone is provided with an outward turning edge which is located at the joint of the cylinder section of the outer layer cyclone and the upper cone section of the two cone sections of the outer layer cyclone. The section of the primary overflow pipe located in the cone section of the outer layer cyclone is provided with a spiral cone disc. The section of the primary overflow pipe located in the cylinder section of the inner layer cyclone is provided with a rotating disc, and the upper and lower surfaces of the rotating disc are both smooth cone surfaces. The secondary cyclone device comprises at least two sets of secondary cyclone units, each of which comprises a secondary cyclone and a filter; the filter is arranged in the secondary cyclone; the top of the secondary cyclone is provided with a secondary overflow pipe which is connected with the filter; the side wall is provided with a secondary feeding port, and the bottom is provided with a secondary underflow port; the top end of the primary overflow pipe is connected with each secondary feeding port through a distribution pipe, and each secondary underflow port is connected with a secondary material pipe through a collecting pipe. The filtering and grading device comprises a grading box body, and the grading box body is sequentially provided with a primary filter plate, a secondary filter plate and a tertiary filter plate which are inclined to the same direction from top to bottom; the filter hole diameter of a lower filter plate is smaller than that of an upper filter plate; the lower end of each filter plate is provided with a collecting port; the outer layer underflow port extends into the grading box body and is located at the upper end of the primary filter plate; the primary material pipe extends into the grading box body and is located at the upper end of the secondary filter plate; the secondary material pipe extends into the grading box body and is located at the upper end of the tertiary filter plate; the bottom of the grading box body is provided with a discharge port which is connected with the feeding device through a feeding pipe; and the feeding pipe is provided with a conveying pump.

2. The multi-sizer system of claim 1, wherein, The feeding device comprises a feeding box body, the top of the feeding box body is provided with a raw material inlet, the inside of the feeding box body is provided with a rotatable stirring propeller which is driven by an external motor, and the bottom of the feeding box body is connected with a feeding pipe which is provided with a booster pump.

3. A multi-size mineral particle screening system according to claim 2, wherein, The top wall of the feeding box body is provided with a plurality of exhaust holes.

4. The multi-sizer system of claim 1, wherein, The secondary cyclone is sequentially composed of a cylinder section and a cone section from top to bottom, and the cone section is gradually tapered from top to bottom.

5. A multi-size mineral particle screening system according to claim 4, wherein, The filter is fixedly arranged in the cylinder section of the secondary cyclone, and the filter comprises a shell which forms a filtering cavity inside; and the shell is provided with a plurality of filter holes.

6. The multi-sizer system of claim 1, wherein, A primary collecting slide plate which is arranged in an inclined manner is arranged between the primary filter plate and the secondary filter plate, and is used for collecting the material filtered by the primary filter plate and sliding into the upper end position of the secondary filter plate. A secondary collecting slide plate which is arranged in an inclined manner is arranged between the secondary filter plate and the tertiary filter plate, and is used for collecting the material filtered by the secondary filter plate and sliding into the upper end position of the tertiary filter plate.

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