Fine particle level hydraulic grinding and thickening equipment with grinding and thickening functions

Abstract

The application discloses a kind of fine particle grade hydraulic grinding and thickening equipment with grinding and thickening function, comprising: hydraulic grinding device, high-pressure pump (5), circulating water tank (6) and thickening device;The hydraulic grinding device includes cyclone grinding tank (2) and circulating cylinder (3);Cyclone grinding tank (2) bottom is connected with high-pressure pump (5) water outlet along tangential direction, under the action of high-pressure water, to be ground ore pulp (17) and steel ball (18) rotate upward along the direction of water flow;In circulating cylinder (3) and cyclone grinding tank (2) inner wall, up and down circulation stirring, collision, friction and crushing;After crushing, to be ground mineral (17) fine particles rise under the action of water flow, separate from circulating crushing area, low concentration ore pulp containing fine particles floats by overflow pipe (7) overflow, flows into thickening device, and carries out thickening treatment.Through the action of water flow, the energy consumption is low;At the same time, can power-free, automatically to product granularity carries out thickening classification, and efficiency is high.

Description

Technical Field

[0001] This invention belongs to the field of mechanical technology, and in particular relates to a fine-particle hydraulic grinding equipment with grinding and thickening functions. Background Technology

[0002] Grinding mills and grinding mills are widely used in industrial production. While the types of machinery differ, the basic principle of material crushing during the grinding process is similar. When the rotating parts of the mill rotate at a certain speed, the steel balls (rods) and ore grinding media inside the cylinder are lifted to a certain height by the friction between the cylinder liner and the grinding media, the gravity of the grinding media, and the centrifugal force generated by the mill's rotation. Then, when the gravity of the grinding media (actually the radial component of gravity) is greater than or equal to the centrifugal force, they begin to detach from the inner wall of the cylinder and fall along a certain trajectory. This cyclical motion generates impact and grinding action, thereby crushing the material.

[0003] Because the mill cylinder and its related rotating parts are all involved in the movement and crushing process, the mill consumes extremely high amounts of energy. In addition, the mill cannot classify the particle size of the product during operation, which easily leads to over-crushing or the discharge of products that do not meet the qualified particle size from the mill. Summary of the Invention

[0004] The purpose of this invention is to provide a fine-particle hydraulic grinding equipment with grinding and thickening functions. It performs crushing work through water flow, resulting in low energy consumption. At the same time, it can automatically and without power thicken and classify the particle size of the product, resulting in high efficiency.

[0005] The technical solution provided by this invention is as follows:

[0006] A fine-particle hydraulic grinding equipment with grinding and thickening functions includes: a hydraulic grinding device, a high-pressure pump 5, a circulating water tank 6, and a thickening device;

[0007] The hydraulic grinding device includes a vortex grinding tank 2 and a circulation cylinder 3; the circulation cylinder 3 is installed at the center of the vortex grinding tank 2; the vortex grinding tank 2 is cylindrical, and a water inlet pipe 19 is provided tangentially at the bottom, the water inlet pipe 19 connects the inside of the vortex grinding tank 2 to the outlet of the high-pressure pump 5, and the high-pressure pump 5 is connected to the circulation tank 6.

[0008] The upper end of the cyclone mill 2 is provided with multiple overflow pipes 7, and the overflow pipes 7 are connected to the thickening device;

[0009] The bottom of the cyclone mill 2 is also connected to a feed pipe 1; the mineral to be ground 17 and steel balls 18 are added into the cyclone mill 2 through the feed pipe 1; the high-pressure water output by the high-pressure pump 5 is tangentially fed into the cyclone mill 2 through the water inlet pipe 19. Under the action of the high-pressure water, the mineral to be ground 17 and steel balls 18 rotate and rise along the direction of water flow; they are circulated, stirred, collided, rubbed and crushed between the circulation cylinder 3 and the inner wall of the cyclone mill 2 to form a slurry to be ground.

[0010] The fine particles of the pulverized ore slurry rise under the action of water flow, leaving the pulverizing zone. The low-concentration slurry containing fine particles floats up and overflows from the overflow port 7, flowing into the thickening device for thickening operations.

[0011] The cyclone mill 2 is equipped with a ball-blocking mesh plate 13 at the top. The ball-blocking mesh plate 13 is located below the inlet of the overflow pipe 7 to prevent substandard slurry particles from entering the thickening device through the overflow pipe 7.

[0012] The cyclone mill 2 is lined with a wear-resistant rubber lining 20.

[0013] The circulating cylinder 3 has a circulating cylinder discharge pipe 4 that connects the inside and outside of the circulating cylinder 3. The circulating cylinder discharge pipe 4 is inclined and its opening faces upwards.

[0014] The outlet pressure of the high-pressure pump 5 is controlled between 10MPa and 30MPa.

[0015] The thickening device includes a slurry adjustment tank 8, a first-stage settling cylinder 9, a second-stage settling cylinder 10, and a third-stage settling cylinder 11; the first-stage settling cylinder 9, the second-stage settling cylinder 10, and the third-stage settling cylinder 11 are arranged sequentially from top to bottom in the slurry adjustment tank 8.

[0016] The low-concentration slurry containing fine particles undergoes multi-stage sedimentation and stratification, forming a high-concentration slurry at the bottom of the slurry adjustment tank 8. The overflow water at the top of the slurry adjustment tank 8 enters the circulating water tank 3 through the upper return water pipe 21 for recycling.

[0017] The Class II settling cylinder 10 and Class III settling cylinder 11 are one or more stages, respectively.

[0018] As can be seen from the technical solutions provided by the present invention above, the fine-particle hydraulic grinding equipment with grinding and thickening functions provided by the embodiments of the present invention performs crushing work through the action of water flow, with low energy consumption; at the same time, it can thicken and classify the product particle size automatically without power, with high efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a fine-particle hydraulic grinding equipment with grinding and thickening functions according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the hydraulic grinding device, a fine-particle hydraulic grinding and thickening equipment according to an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the tangential water inlet pipe at the bottom of the cyclone milling tank of a fine-particle hydraulic milling equipment with grinding and thickening functions, according to an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the force exerted on the ore to be ground according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the thickening device of a fine-particle hydraulic milling equipment with grinding and thickening functions according to an embodiment of the present invention.

[0025] In the diagram: 1. Feed pipe, 2. Cyclone mill trough, 3. Circulation cylinder, 4. Circulation cylinder feed pipe, 5. High-pressure pump, 6. Circulation water tank, 7. Overflow pipe, 8. Slurry adjustment tank, 9. Stage I settling cylinder, 10. Stage II settling cylinder, 11. Stage III settling cylinder, 12. Ore discharge valve, 13. Baffle plate, 14. Cleaning water pipe, 15. Qualified slurry outlet, 16. Support, 17. Slurry to be ground, 18. Steel ball, 19. Water inlet pipe, 20. Wear-resistant rubber lining, 21. Return water pipe. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0027] First, the following explanations are provided for the terms that may be used in this article:

[0028] The term "and / or" means that either or both can be achieved simultaneously. For example, X and / or Y means that it includes both "X" or "Y" as well as the three cases of "X and Y".

[0029] The terms “including,” “comprising,” “containing,” “having,” or other similar semantic descriptions should be interpreted as non-exclusive inclusion. For example, “including a technical feature element (such as raw material, component, ingredient, carrier, dosage form, material, size, part, component, mechanism, device, step, process, method, reaction conditions, processing conditions, parameter, algorithm, signal, data, product or article of manufacture, etc.)” should be interpreted as including not only the expressly listed technical feature element, but also other technical feature elements that are not expressly listed and are well-known in the art.

[0030] The term "composed of" excludes any technical features not expressly listed. When used in a claim, it closes the claim to exclude all technical features other than those expressly listed, except for associated conventional impurities. If the term appears only in a clause of a claim, it limits the claim to the elements expressly listed in that clause; elements recited in other clauses are not excluded from the overall claim.

[0031] The term "parts by mass" indicates the mass ratio between multiple components. For example, if component X is described as x parts by mass and component Y as y parts by mass, then the mass ratio of component X to component Y is x:y. One part by mass can represent any mass; for example, one part by mass can be expressed as 1 kg or 3.1415926 kg, etc. The sum of the parts by mass of all components is not necessarily 100 parts; it can be greater than 100 parts, less than 100 parts, or equal to 100 parts. Unless otherwise stated, parts, proportions, and percentages mentioned herein are all measured by mass.

[0032] Unless otherwise explicitly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this document according to the specific circumstances.

[0033] When concentration, temperature, pressure, size, or other parameters are expressed as numerical ranges, such ranges should be understood to specifically disclose all ranges formed by any pairing of upper limits, lower limits, or preferred values ​​within that range, regardless of whether the range is explicitly stated; for example, if the numerical range "2 to 8" is stated, then that range should be interpreted to include ranges such as "2 to 7", "2 to 6", "5 to 7", "3 to 4 and 6 to 7", "3 to 5 and 7", "2 and 5 to 7", etc. Unless otherwise stated, the numerical ranges described herein include both their endpoints and all integers and fractions within that range.

[0034] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” and “counterclockwise” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience and simplification of description and do not imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this document.

[0035] The embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0036] Example 1

[0037] like Figures 1 to 4 As shown, a fine-particle hydraulic grinding equipment with grinding and thickening functions is used to form a slurry from the mineral to be ground 17 through hydraulic grinding to meet industrial applications. Specifically, it includes: a hydraulic grinding device, a high-pressure pump 5, a circulating water tank 6, and a thickening device.

[0038] like Figure 2 As shown, the hydraulic grinding device includes a vortex grinding tank 2 and a circulation cylinder 3. The vortex grinding tank 2 is cylindrical and is made of welded steel plates approximately 10mm thick. It is lined with a wear-resistant rubber liner 20, which can be bolted to the inner wall of the grinding tank 2. The circulation cylinder 3 is cast from wear-resistant material and is installed at the center of the vortex grinding tank 2; specifically, it may be directly welded to the inner wall of the vortex grinding tank 2 via a connecting rod. The cylinder wall of the circulation cylinder 3 has a circulation cylinder discharge pipe 4 connecting the inside and outside of the circulation cylinder 3. The circulation cylinder discharge pipe 4 is inclined, with its opening facing upwards.

[0039] like Figure 3 As shown in this example, the bottom of the vortex mill 2 is provided with a water inlet pipe 19 along the tangential direction. The water inlet pipe 19 connects the inside of the vortex mill 2 to the outlet of the high-pressure pump 5. The high-pressure pump 5 is connected to the circulating water tank 6.

[0040] like Figure 2 As shown, the upper end of the cyclone mill 2 is provided with multiple overflow pipes 7, which are connected to the thickening device; at the same time, a ball-blocking mesh plate 13 is provided in the upper part of the cyclone mill 2, which is located below the inlet of the overflow pipe 7 to prevent larger particles of the mineral to be ground 17 or steel balls 18 from entering the thickening device through the overflow pipe 7, thus ensuring safety.

[0041] The bottom of the cyclone mill 2 is also connected to a feed pipe 1; the upper opening of the feed pipe 1 is located at the top of the cyclone mill 2, higher than the overflow pipe 7, to facilitate the addition of the mineral to be ground 17 while preventing water from flowing out. The mineral to be ground 17 and steel balls 18 are added into the cyclone mill 2 through the feed pipe 1; the steel balls 18 are added as needed or according to the amount of loss, and the mineral to be ground 17 can be continuously added. The high-pressure water output from the high-pressure pump 5 is tangentially fed into the cyclone mill 2 through the inlet pipe 19, and the outlet pressure of the high-pressure pump 5 is controlled between 10MPa and 30MPa. Under the action of the high-pressure water, the mineral to be ground 17 and the steel balls 18 rotate and rise along the direction of water flow; they circulate, agitate, collide, rub, and crush between the circulation cylinder 3 and the inner wall of the cyclone mill 2 to form a slurry to be ground; the specific circulation crushing process is as follows:

[0042] The ore to be ground 17 and the steel balls 18 rotate and rise along the direction of the water flow. For example... Figure 4 As shown, during this process, the mineral 17 to be ground is subjected to water resistance Fz, gravity Fg, and buoyancy F f Under the action of forces such as water lift Fs, when equation (1) is satisfied:

[0043] F f +F s -F z -F g >0 (1)

[0044] At this point, the mineral to be ground, 17, moves upward.

[0045] When equation (2) is satisfied:

[0046] F f +F s -F z -F g <0 (2)

[0047] At this point, the upward force of the mineral to be ground 17 cannot overcome the water resistance and gravity, and will change its upward trend to move downward. During the descent, the descending mineral to be ground 17 collides with the ascending mineral to be ground 17 or the steel ball 18. Under the action of collision and friction, the mineral gradually changes from a large particle size product to a small particle size product.

[0048] The circulating cylinder 3 enhances the grinding process of mineral materials and improves grinding efficiency.

[0049] As the particle size of the mineral to be ground 17 decreases, its gravity decreases. The fine particles of the crushed mineral to be ground 17 rise under the action of water flow. The water lift can easily overcome the gravity and leave the circulation cylinder area. The low-concentration slurry containing fine particles floats up and overflows from the overflow port 7, flowing into the thickening device for thickening treatment.

[0050] The slurry overflowing from the overflow port 7 of the cyclone mill 2 is a low-concentration slurry (8%–12%), which is insufficient to meet the requirements of further beneficiation operations and requires further thickening. Therefore, the low-concentration slurry needs to enter the thickening unit for thickening treatment.

[0051] The bottom of the cyclone mill 2 is also equipped with a discharge valve 12, which is used to discharge some impurities and waste from the minerals 17 to be ground.

[0052] like Figure 5 As shown, in this example, the thickening device includes a slurry adjustment tank 8, a first-stage settling cylinder 9, a second-stage settling cylinder 10, and a third-stage settling cylinder 11. The first-stage settling cylinder 9, the second-stage settling cylinder 10, and the third-stage settling cylinder 11 are arranged sequentially from top to bottom within the slurry adjustment tank 8. All are mounted on supports 16, and the bottom of the third-stage settling cylinder 11 is connected to a qualified slurry outlet 15 and a cleaning water pipe interface 14, respectively. The second-stage settling cylinder 10 and the third-stage settling cylinder 11 can be single-stage or multi-stage. The slurry adjustment tank 8 is equipped with multiple conical settling cylinders, and the number of stages can be set to 3 to 5 stages as needed. In this embodiment, it is set to 3 stages, namely the first-stage settling cylinder 9, the second-stage settling cylinder 10, and the third-stage settling cylinder 11. The low-concentration slurry containing fine particles undergoes multi-stage sedimentation and stratification, forming a high-concentration slurry at the bottom of the slurry adjustment tank 8. The overflow water at the top of the slurry adjustment tank 8 enters the circulation cylinder 3 through the upper return water pipe 21 for recycling.

[0053] When low-concentration slurry enters the discharge pipe 4 of the circulating cylinder, the heavier useful minerals quickly sink, while the lighter water remains at the top of the slurry, thus completing stratification, a process known in mineral processing as thickening. To improve the thickening effect, a multi-stage conical settling tank is installed in the slurry adjustment tank 8. The first-stage settling tank 9, the second-stage settling tank 10, and the third-stage settling tank 11 are arranged in series. Two to five parallel settling tanks can be installed in each stage as needed. Thus, the high-concentration slurry gradually enters the second-stage settling tank 10 and the third-stage settling tank 11, and finally discharges from the qualified slurry outlet 15, thereby completing the slurry thickening process.

[0054] The cleaning water pipe 14 is used to connect to the cleaning water pipe to clean the settling cylinder. The overflow water from the slurry adjustment tank 8 enters the circulating water tank 6 through the upper return water pipe 21, and then enters the cyclone mill tank 2 through the high-pressure pump station 5. The entire thickening operation requires no power and is a non-powered thickening process.

[0055] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations 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. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A fine-particle hydraulic grinding and thickening equipment with grinding and thickening functions, characterized in that: include: Hydraulic grinding device, high-pressure pump (5), circulating water tank (6) and thickening device; The hydraulic grinding device includes a vortex grinding tank (2) and a circulation cylinder (3); the circulation cylinder (3) is installed at the center of the vortex grinding tank (2); the vortex grinding tank (2) is cylindrical, and a water inlet pipe (19) is provided tangentially at the bottom. The water inlet pipe (19) connects the inside of the vortex grinding tank (2) to the outlet of the high-pressure pump (5), and the high-pressure pump (5) is connected to the circulation tank (6); The upper end of the cyclone mill (2) is provided with multiple overflow pipes (7), and the overflow pipes (7) are connected to the thickening device; The circulating cylinder (3) has multiple rows of circulating cylinder discharge pipes (4) that connect the inside and outside of the circulating cylinder (3) along the circumferential direction. The circulating cylinder discharge pipes (4) are inclined and open obliquely upward. The multiple circulating cylinder discharge pipes (4) in each row are arranged vertically at intervals. The bottom of the cyclone mill (2) is also connected to a feed pipe (1); the mineral to be ground (17) and steel balls (18) are added into the cyclone mill (2) through the feed pipe (1); the high-pressure water output by the high-pressure pump (5) is tangentially fed into the cyclone mill (2) through the water inlet pipe (19), and under the action of the high-pressure water, the mineral to be ground (17) and steel balls (18) rotate and rise along the direction of the water flow; they are circulated and stirred, collided, rubbed and crushed between the circulation cylinder (3) and the inner wall of the cyclone mill (2) to form a slurry to be ground; The fine particles in the slurry to be ground rise under the action of water flow and leave the grinding zone. The low-concentration slurry containing fine particles floats up and overflows from the overflow pipe (7) and flows into the thickening device for thickening operation. The slurry adjustment tank (8) of the thickening device is arranged with a first-stage settling cylinder (9), a second-stage settling cylinder (10) and a third-stage settling cylinder (11) from top to bottom. The low-concentration slurry containing fine particles undergoes multi-stage settling and stratification, forming a high-concentration slurry at the bottom of the slurry adjustment tank (8). The overflow water at the top of the slurry adjustment tank (8) enters the circulating water tank (6) through the upper return water pipe (21), and then enters the vortex mill tank (2) through the high-pressure pump (5) for recycling.

2. The fine-particle hydraulic grinding equipment with grinding and thickening functions according to claim 1, characterized in that, The vortex mill (2) is equipped with a ball-blocking mesh plate (13) at the top. The ball-blocking mesh plate (13) is located below the inlet of the overflow pipe (7) to prevent substandard slurry particles from entering the thickening device through the overflow pipe (7).

3. The fine-particle hydraulic grinding equipment with grinding and thickening functions according to claim 1, characterized in that, The cyclone mill (2) is lined with a wear-resistant rubber lining (20).

4. The fine-particle hydraulic grinding equipment with grinding and thickening functions according to claim 1, characterized in that, The outlet pressure of the high-pressure pump (5) is controlled between 10MPa and 30MPa.

5. The fine-particle hydraulic grinding equipment with grinding and thickening functions according to claim 1, characterized in that, The Class II settling cylinder (10) and Class III settling cylinder (11) are one or more stages, respectively.

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