Pre-magnetic separation slurry distributor and method

Abstract

The present invention discloses a pre-magnetic separation slurry distributor and method. The distributor includes a box body, and an energy dissipation plate and an overflow plate arranged longitudinally therein. The energy dissipation plate and the overflow plate divide the interior of the box body into a slurry making area, an overflow area and a ore separation area in sequence. A slurry making water inlet and an ore inlet are arranged above the slurry making area, and an ore discharge port is arranged below the ore separation area. The box body includes an obliquely arranged bottom flow plate. A gap is left between the bottom of the energy dissipation plate and the bottom flow plate to form a first channel. A gap is left between the bottom of the overflow plate and the bottom flow plate to form a second channel. An anti-blocking device facing the ore separation area is provided on the bottom flow plate to dredge the second channel. The present invention can make the pre-selector feed ore evenly, avoid slurry sedimentation, and closely combine the functions of slurry making, overflow, ore separation, and anti-blocking. It has a compact structure, convenient operation, stable and reliable operation, low maintenance, and high operating rate, and can efficiently ensure the smooth progress of production.

Description

Technical Field

[0001] The invention relates to the technical field of ore pulp feeding equipment, and in particular to a novel pre-magnetic separation ore pulp distributor and method. Background Art

[0002] At present, the magnetite beneficiation technology is improving day by day. The emergence of new process equipment such as high-pressure roller mills has led to more and more applications of pre-selection technology before entering the mill, and large-scale pre-selection magnetic separators with a particle size of 0mm to 12mm have become more mature. However, as the capacity of the beneficiation plant increases, the number of pre-selection machines also increases. In production, the pre-selection magnetic separator is fed with dry material belts, and a large amount of water needs to be added to the pre-selection magnetic separator to make pulp. In production, large-particle pulp cannot be evenly separated, and pulp sedimentation often occurs. How to make the pre-selection machine feed the ore evenly and prevent the pulp from sedimentation is an urgent problem that needs to be solved. Summary of the invention

[0003] The purpose of the present invention is to provide a pre-magnetic separation slurry distributor to solve the problem that large-particle slurry cannot be evenly divided in production and slurry sedimentation often occurs. The present invention is particularly suitable for the feeding operation of multiple pre-selection magnetic separators with large particle sizes of magnetite 0mm to 12mm.

[0004] Another object of the present invention is to provide a method for distributing slurry for pre-magnetic separation.

[0005] The above purpose is achieved through the following technical solutions:

[0006] According to one aspect of the present invention, a pre-magnetic separation slurry distributor provided by the present invention comprises: a box body, and an energy dissipation plate and an overflow plate longitudinally arranged inside the box body, the energy dissipation plate and the overflow plate divide the internal space of the box body into three areas, namely a slurry making area, an overflow area and a mining area, a slurry making water inlet and a mining inlet are arranged above the slurry making area, and a mining discharge port is arranged below the mining area; wherein the box body comprises an obliquely arranged bottom flow plate; a gap is left between the bottom of the energy dissipation plate and the bottom flow plate to form a first channel; a gap is left between the bottom of the overflow plate and the bottom flow plate to form a second channel; an anti-blocking device is arranged on the bottom flow plate, and the anti-blocking device is arranged toward the mining area to clear the second channel.

[0007] Preferably, the energy dissipation plate is connected to the box body except for the bottom edge, so that the upper part of the pulping area is closed.

[0008] Preferably, a water flow regulator, such as a flow regulating valve, is provided on the pipeline connected to the pulping water inlet.

[0009] Preferably, the inclination angle of the underflow plate is 15° to 30°. More preferably, the inclination angle of the underflow plate is 20° to 25°. Further preferably, the inclination angle of the underflow plate is 25°.

[0010] Preferably, the box body further comprises: a horizontal bottom plate connected with the bottom flow plate, the horizontal bottom plate is located below the ore separation area, and the bottom flow plate is located below the pulping area and the overflow area. The discharge port is arranged on the horizontal bottom plate and connected to the discharge flange.

[0011] Preferably, the anti-blocking device is a high-pressure water pipe, and the second channel is unblocked by high-pressure water flow. More preferably, the anti-blocking device can also be provided with a nozzle connected to the high-pressure water pipe to make the water flow more uniform.

[0012] Preferably, the distributor further comprises: a slurry adjustment auxiliary descending device, which is arranged above the mining area and is used to adjust the concentration of the slurry and assist the slurry to descend to prevent the discharge of ore from settling.

[0013] Preferably, overflow holes are evenly arranged on the plate surface of the overflow plate, and the diameter of the overflow holes is about 2 mm.

[0014] Preferably, the slurry adjustment auxiliary descent device is a water inlet pipe installed on the top surface of the box body, which is used to adjust the concentration of the slurry, and at the same time, the slurry is assisted by water flow to descend to the sub-mining area, and then discharged from the sub-mining area. More preferably, a water flow regulator, such as a flow regulating valve, can also be provided on the slurry adjustment auxiliary descent device.

[0015] Preferably, the distributor further comprises: a sampling area and an analysis and monitoring device, wherein the sampling area is arranged above the sub-mining area, and samples are taken through a sampling tube and fed into the analysis and monitoring device to perform online monitoring and analysis on the particle size and concentration of the slurry. The sampling area is separated by a sampling plate and can be located in the middle of the entire sub-mining area.

[0016] Preferably, at least one ore separation plate is installed in the ore separation area to divide the ore separation area into a plurality of subareas. More preferably, the slurry adjustment auxiliary lowering device is arranged above each subarea. Furthermore, the ore separation plate is arranged perpendicular to the overflow plate.

[0017] According to another aspect of the present invention, a method for distributing pre-magnetic separation slurry is provided by the present invention, which adopts the above-mentioned pre-magnetic separation slurry distributor for distribution, and includes the following steps: introducing minerals and water into the slurry making area from the ore inlet and the slurry making water inlet respectively to make slurry, and dissipating energy and slowing down the minerals and / or water through the energy dissipation plate to obtain slurry; the slurry flows from the first channel between the bottom flow plate and the energy dissipation plate to the overflow area, and then overflows into the mining area through the overflow plate, or enters the mining area from the overflow area through the second channel under the dredging effect of the anti-blocking device.

[0018] In the present invention, a large amount of slurry overflows from the overflow plate to the mining area, and the slurry with large particles and easy precipitation enters the mining area from the second channel under the action of the anti-blocking device. Specifically, the particle size of the slurry overflowing from the overflow plate to the mining area is generally no more than 1 mm. The particle size of the slurry entering the mining area from the second channel is generally 1 mm to 12 mm. Among them, a large amount of slurry overflows from the top of the overflow plate or the overflow hole set thereon to the mining area.

[0019] Preferably, the method further comprises: supplying water downward for a second time from the slurry adjustment and auxiliary descending device to adjust the concentration of the slurry and assist the slurry in descending.

[0020] Preferably, the method also includes: extracting the slurry located above the sub-mining area, analyzing and monitoring the particle size and concentration of the slurry to obtain analysis and monitoring results; and adjusting the water flow rate of the slurry making water inlet and the slurry adjustment auxiliary reduction device according to the analysis and monitoring results, so as to achieve the purpose of adjusting the slurry concentration.

[0021] More preferably, the method further comprises: adjusting the high pressure intensity of the anti-blocking device according to the analysis and monitoring results.

[0022] Compared with the prior art, the present invention has the following beneficial effects: the pre-magnetic separation slurry distributor and method of the present invention closely combines structures such as energy dissipation plates, underflow plates, second channels and anti-blocking devices, integrates the functions of pulping, energy dissipation, overflow, ore separation and anti-blocking, so that the pre-selector feeds more evenly in production and avoids pulp sedimentation or blockage. Among them, the minerals entering the pulping area are dissipated and blocked by the energy dissipation plate, and can flow downward smoothly, and then flow to the overflow area / and the ore separation area by the inclined underflow plate, and then most of the slurry overflows to the ore separation area through the overflow plate, and a small part of the slurry with large particle size and easy precipitation enters the ore separation area from the second channel with the assistance of the anti-blocking device, thereby avoiding blockage and ensuring orderly and smooth production. The distributor of the present invention has the advantages of compact structure and convenient operation. When distributing slurry, it runs stably and reliably, has low maintenance and high operating rate, and can efficiently ensure the smooth progress of production. The present invention is particularly suitable for the feeding operation of multiple pre-selection magnetic separators with large particle size of magnetite not exceeding 12mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a schematic longitudinal section diagram of the pre-magnetic separation slurry distributor of the present invention;

[0024] Figure 2 It is a schematic cross-sectional view of the pre-magnetic separation slurry distributor of the present invention.

[0025] Figure 1-Figure 2 Among them, 1 box body, 2 ore inlet flange, 3 ore discharge flange, 4 sampling tube, 8 sampling plate, 5 energy dissipation plate, 6 overflow plate, 7 ore separation plate, 9 slurry making water inlet, 10 anti-blocking device, 11 slurry adjustment auxiliary lowering device, 12 bottom flow plate, 13 second channel. DETAILED DESCRIPTION

[0026] 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:

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0028] Figure 1 and Figure 2 The structure of a pre-magnetic separation slurry distributor of the present invention is schematically shown. Figure 1 and Figure 2As shown, a pre-magnetic separation slurry distributor provided by the present invention comprises: a box body 1, an energy dissipation plate 5 and an overflow plate 6, wherein the energy dissipation plate 5 and the overflow plate 6 are longitudinally arranged inside the box body 1, and the internal space of the box body 1 is divided into three areas, namely a slurry making area, an overflow area and a mining area, a slurry making water inlet 9 and a mining inlet are arranged above the slurry making area, and a mining outlet is arranged below the mining area; wherein the box body 1 comprises an obliquely arranged bottom flow plate 12; a gap is left between the bottom of the energy dissipation plate 5 and the bottom flow plate 12 to form a first channel; a gap is left between the bottom of the overflow plate 6 and the bottom flow plate 12 to form a second channel 13; an anti-blocking device 10 is also arranged on the bottom flow plate 12, and the anti-blocking device 10 is arranged toward the mining area to clear the second channel 13. During production, minerals and water enter the pulping area from the ore inlet and the pulping water inlet 9 respectively, pulping and energy dissipation are carried out to obtain ore pulp; then the ore pulp flows to the overflow area through the first channel under the energy dissipation plate 5, and then a large amount of ore pulp overflows through the overflow plate 6 to the mining area. Some ore pulp with large particles and easy sedimentation flows from the overflow area through the second channel 13 to the mining area under the dredging effect of the anti-blocking device 10, thereby effectively avoiding the sedimentation of the ore pulp, preventing blockage, and ensuring that the ore pulp in production can be evenly separated.

[0029] In the present invention, the top surface of the box body 1 is provided with an inlet for ore and a slurry water inlet 9, and the inlet for ore and the slurry water inlet 9 are both located above the slurry making area, and the inlet for ore is connected to the inlet flange 2. Preferably, two slurry water inlets 9 can be provided, respectively distributed on both sides of the inlet for ore, so that water and minerals are evenly mixed, and the slurry making efficiency and quality are improved. In the present invention, the bottom surface of the box body 1 is inclined to form an underflow plate 12. The inclination angle of the underflow plate 12 can be 15° to 30°. Preferably, the inclination angle of the underflow plate 12 can be 20° to 25°, and more preferably, the inclination angle of the underflow plate 12 is 25°. In order to better realize the self-flow of ore slurry to the overflow area and the mining area. Preferably, the energy dissipation plate 5 and the overflow plate 6 in the box body 1 are arranged in parallel, and are parallel to the left and right sides of the box body 1.

[0030] Preferably, the box body 1 may also include a horizontal bottom plate connected to the bottom flow plate 12, the horizontal bottom plate is placed below the mining area, the inclined bottom flow plate 12 is placed below the pulping area and the overflow area, and the bottom flow plate 12 is inclined from the pulping area to the overflow area, so that the slurry can flow to the overflow area and the mining area by itself, and can avoid accumulation in the corners of the mining area to cause blockage. In order to smoothly discharge the slurry in the mining area, the discharge port is set on the horizontal bottom plate and connected to the discharge flange 3.

[0031] The energy dissipation plate 5 is connected to the box body 1 except for the bottom edge, that is, the three edges of the energy dissipation plate 5 are respectively connected to the top surface of the box body 1 and the front and rear surfaces of the box body 1, so as to seal the upper part of the pulping area. The energy dissipation plate 5 can not only dissipate energy and slow down the slurry, but also prevent the slurry from splashing.

[0032] Overflow holes can be evenly arranged on the overflow plate 6, and the aperture of the overflow hole can be about 2 mm. The overflow plate 6 can be a vertical plate, and the three sides except the bottom side are respectively connected to the top surface and the front and rear surfaces of the box body 1, so that the top surface of the box body 1 forms the top plate above the mining area. The top of the overflow plate 6 is not sealed with the box body 1.

[0033] In an optional embodiment, a sampling area can also be set above the sub-mining area, and then the sampled samples can be analyzed and monitored by an analysis and monitoring device. Specifically, a sampling area can be separated by a sampling plate 8 at the middle position of the sub-mining area, and a representative ore sample can be obtained at the overflow surface. The sampling tube 4 is connected, and the sampling tube 4 is fed into the analysis and monitoring device for online analysis and monitoring of the slurry particle size and concentration. Then, the water flow rate of the pulping water inlet 9 and the water inlet of the slurry adjustment auxiliary device 11 can be adjusted according to the analysis and monitoring results, so as to adjust the slurry concentration. The analysis and monitoring device can be an analysis instrument type device.

[0034] In the present invention, in order to facilitate the flow of large-particle slurry that is easy to settle to the mining area, a gap is left between the overflow plate 6 and the bottom flow plate 12 to form a second channel 13. In order to further prevent large-particle precipitation or blockage of the bottom gap, an anti-blocking device 10 is set on the bottom flow plate 12, which is set toward the mining area, and is used to dredge the second channel 13 to prevent blockage. Preferably, the anti-blocking device 10 uses a high-pressure water pipe to dredge the second channel 13 through a high-pressure water flow, so that the large-particle slurry is flushed into the mining area. Specifically, a hole can be opened near the second channel 13 on the bottom flow plate 12, and then the high-pressure water pipe is placed horizontally, and the pipe mouth is sealed around the hole to ensure sealing and prevent the slurry from flowing out. More preferably, in order to improve the uniformity of slurry separation, a nozzle can also be connected to the end of the high-pressure water pipe. In order to further ensure the uniformity of slurry separation and improve the anti-blocking effect, a plurality of anti-blocking devices 10 can be set, and further, they can be set one by one corresponding to the partitions in the mining area.

[0035] In an optional embodiment, in order to adjust the concentration of the slurry for a second time, a slurry adjustment auxiliary descending device 11 may be provided on the top of the box 1 located above the sub-mining area. The slurry adjustment auxiliary descending device 11 may be a water inlet pipe, which can assist the slurry to descend by water flow to avoid blockage while performing a second adjustment on the slurry concentration. Preferably, a water flow regulator, such as a flow regulating valve, may also be provided on the water inlet pipe. When the overflow plate 6 is a vertical plate, the slurry adjustment auxiliary descending device 11 may adjust the concentration of the slurry in the sub-mining area and assist in descending, and may prevent the slurry from settling and accumulating at the bottom of the sub-mining area.

[0036] The mining area can be divided into multiple subareas by using one or more mining boards 7 according to the number of mining areas. Figure 2 As shown, a separation plate 7 can be used to divide the separation area into two sub-areas, and a slurry adjustment auxiliary device 11 is arranged above each sub-area, and each sub-area corresponds to an anti-blocking device 10. The separation plate 7 and the overflow plate 6 are arranged perpendicular to each other, or at an angle.

[0037] The distribution process of the pre-magnetic separation slurry distributor of the present invention is described below in conjunction with the accompanying drawings:

[0038] During production, the discharge port of the mining belt is connected to the mining flange 2 at the top of the box body 1 of the present invention, the mineral particles enter the pulping area, the pulping water inlet 9 is opened, and the minerals are mixed with a large amount of water to become slurry (slurry). After the slurry enters the pulping area, the energy dissipation plate 5 is sealed and designed to be of sufficient height, which has the functions of dissipating energy and reducing speed and preventing the slurry from splashing.

[0039] After energy dissipation, the slurry flows from the first channel through the bottom flow plate 12 with an angle to the overflow area. A large amount of slurry overflows through the overflow plate 6 and is fed into the sub-mining area. Some large-particle-sized and easily precipitated materials enter the sub-mining area through the second channel 13 between the bottom flow plate 12 and the overflow plate 6. At the same time, in order to prevent large-particle precipitation or blockage of the bottom gap, the anti-blocking device 10 is kept in working condition, and the second channel 13 is cleared by high-pressure water flow to prevent blockage. Among them, under normal circumstances, the particle size of the slurry overflowing from the overflow plate 6 to the sub-mining area does not exceed 1mm. The particle size of the slurry entering the sub-mining area from the second channel 13 is generally 1mm to 12mm.

[0040] During the process, the slurry adjustment auxiliary descending device 11 at the top of each partition is opened, water is introduced to adjust the slurry concentration, and the secondary slurrying is completed. At the same time, it plays a role in assisting the slurry to descend and prevent sedimentation.

[0041] Furthermore, sampling can also be done from the middle position above the sub-mining area, and representative ore samples can be obtained at this overflow surface, and then fed into the subsequent analysis and monitoring device through the sampling tube 4 for online analysis and monitoring of particle size and concentration; finally, the water flow rate in the slurry making water inlet 9 and the slurry adjustment auxiliary lowering device 11 can be adjusted according to the analysis and monitoring results; of course, the analysis and monitoring results also provide a basis for the high-pressure water inlet intensity in the anti-blocking device 10.

[0042] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined by the claims.

Claims

1. A pre-magnetic separation slurry distributor, characterized in that: include: A box body, and an energy dissipation plate and an overflow plate longitudinally arranged inside the box body, wherein the energy dissipation plate and the overflow plate divide the internal space of the box body into three areas, namely, a pulping area, an overflow area and a mining area, wherein a pulping water inlet and a mining inlet are arranged above the pulping area, and a mining outlet is arranged below the mining area; wherein, The box body includes an underflow plate arranged obliquely; A gap is left between the bottom of the energy dissipation plate and the underflow plate to form a first channel; A gap is left between the bottom of the overflow plate and the bottom flow plate to form a second channel; An anti-blocking device is arranged on the bottom flow plate, and the anti-blocking device is arranged toward the mining area to clear the second channel.

2. The pre-magnetic separation slurry distributor according to claim 1, characterized in that: The inclination angle of the bottom flow plate is 15° to 30°.

3. The pre-magnetic separation slurry distributor according to any one of claims 1-2, characterized in that: The box body further comprises: a horizontal bottom plate connected with the bottom flow plate, the horizontal bottom plate is located below the mining area, and the bottom flow plate is located below the pulping area and the overflow area.

4. The pre-magnetic separation slurry distributor according to claim 1, characterized in that: The anti-blocking device is a high-pressure water pipe, which clears the second channel through high-pressure water flow.

5. The pre-magnetic separation slurry distributor according to claim 1, characterized in that: The distributor further comprises: a pulp adjustment and auxiliary descent device, which is arranged above the mining area and is used to adjust the pulp concentration and assist the pulp to descend.

6. The pre-magnetic separation slurry distributor according to claim 5, characterized in that: The slurry adjustment auxiliary descending device is a water inlet pipe installed on the top surface of the box body, which adjusts the slurry concentration and assists the slurry to descend to the mining area through water flow.

7. The pre-magnetic separation slurry distributor according to claim 6, characterized in that: The distributor further comprises: a sampling area and an analysis and monitoring device. The sampling area is arranged above the mining area, and samples are taken through a sampling tube and fed into the analysis and monitoring device for analysis and monitoring.

8. The pre-magnetic separation slurry distributor according to claim 5, characterized in that: At least one ore separation plate is installed in the ore separation area to divide the ore separation area into a plurality of subareas, and the slurry adjustment auxiliary lowering device is arranged above each subarea.

9. A method for distributing slurry for pre-magnetic separation, characterized in that: The method is carried out using the pre-magnetic separation slurry distributor as claimed in claim 1, comprising the following steps: Minerals and water are introduced into the pulping area from the ore inlet and the pulping water inlet respectively to make pulp, and the minerals are dissipated and decelerated by the energy dissipation plate to obtain ore pulp; The slurry flows from the first channel between the bottom flow plate and the energy dissipation plate to the overflow area, and then overflows through the overflow plate to the sub-ore area, or under the dredging effect of the anti-blocking device, it enters the sub-ore area from the overflow area through the second channel.

10. The method for distributing slurry for pre-magnetic separation according to claim 9, characterized in that: The method further comprises: Secondary water is introduced from the pulp adjustment auxiliary descending device to adjust the concentration of the slurry and assist the slurry to descend; Extracting the ore pulp located above the sub-mining area, analyzing and monitoring the particle size and concentration of the ore pulp, and obtaining analysis and monitoring results; According to the analysis and monitoring results, adjust the water flow of the slurry making water inlet and the slurry adjustment auxiliary reduction device.

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