A vertical heavy medium mill and ore dressing method

Abstract

The invention discloses a vertical heavy medium mill and a mineral processing method, comprising a box body and a buffer support member arranged at the lower end of the box body, a sound insulation layer for reducing noise is arranged on the surface of the box body, a driving motor is installed at the upper end of the box body, an output end of the driving motor is connected and fixed to the upper end of a stirring shaft, and the lower end of the stirring shaft is rotatably connected to the bottom of the box body, stirring blades for stirring materials are distributed on the stirring shaft, and the interior of the box body is filled with grinding balls for grinding materials and heavy medium liquid for heavy medium separation. The present application can achieve 95%-100% dissociation of valuable minerals in the mineral grinding process, and effectively protects the particle size of the material without causing over-grinding, so as to achieve on-demand directional grinding and save energy consumption, and the dissociated valuable minerals and gangue minerals are separated by the heavy medium in the mill, the light minerals float up, and the heavy minerals sink, and the two can be separated in time and discharged from the mill, so as to achieve simultaneous grinding and separation.

Description

Technical Field

[0001] The invention relates to the technical field of grinding, in particular to a vertical heavy medium mill and a mineral processing method. Background Art

[0002] Before materials enter the separation, they need to be ground to increase the degree of mineral dissociation. Most of the grinding methods are wet horizontal grinding. For the process that needs to apply the heavy medium separation method, a set of heavy medium separation equipment is usually added after grinding to separate the dissociated valuable minerals.

[0003] In addition, the dissociation degree of valuable minerals in grinding operations usually needs to reach more than 80% or even more than 90%. In order to increase the dissociation degree of valuable minerals, some valuable minerals and gangue minerals will be over-grinded, resulting in unnecessary increase in grinding energy consumption. Secondly, even when the dissociation degree of valuable minerals reaches 90%, there are still a small amount of valuable minerals that have not been dissociated, affecting the mineral processing effect.

[0004] In view of the above problems, a vertical heavy medium mill and a mineral processing method are now provided. Summary of the invention

[0005] The object of the present invention is to provide a vertical heavy medium mill and a mineral processing method to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A vertical heavy medium mill comprises a box body and a buffer support member arranged at the lower end of the box body, a sound insulation layer for reducing noise is arranged on the surface of the box body, a driving motor is installed at the upper end of the box body, the output end of the driving motor is connected and fixed to the upper end of the stirring shaft, the lower end of the stirring shaft is rotatably connected to the bottom of the box body, stirring blades for stirring materials are distributed on the stirring shaft, the inside of the box body is filled with grinding balls and grinding powder for grinding materials, the grinding balls and the grinding powder constitute a fluid grinding material, the fluid grinding material is used to grind materials, and under the action of heavy medium separation, heavy materials can sink and light materials float, so as to achieve the effect of grinding and separation according to specific gravity;

[0008] The upper right side of the box body is provided with a feeding port and a feeding box arranged at the feeding port, the stirring shaft is also provided with a scraping component for scraping off the material adhering to the inner wall of the box body, and the box body is also provided with a filtering component for discharging the ground qualified material;

[0009] The filter assembly includes a first filter element for filtering out light materials and a second filter element for filtering out heavy materials.

[0010] As a further solution of the present invention: the second filter element includes a storage box arranged on the left side of the box body, a discharge hopper for discharging materials is provided at the lower end of the storage box, a discharge port is opened on the surface of the box body where the storage box is located, and a second filter plate for filtering heavy materials is provided at the discharge port, the outer side of the second filter plate is connected to drive a discharging telescopic rod that cooperates with the discharge port, and the discharging telescopic rod and the return spring are detachably connected.

[0011] As a further solution of the present invention: the first filter element includes a first filter plate slidably arranged on the inner wall of the box body, a piston outer ring slidingly matched with the inner wall of the box body is arranged on the outer side of the first filter plate, a piston inner ring matching with the outer side of the stirring shaft is arranged on the inner side of the first filter plate, the upper end of the first filter plate is connected to a telescopic push rod for driving its up and down movement, and the upper end of the first filter plate is provided with a material extraction part for extracting the light material above it.

[0012] As a further solution of the present invention: the material extraction component includes a sliding hole opened on the upper end surface of the box body, and a sliding tube is slidably fitted in the sliding hole. The lower end of the sliding tube is connected and fixed to the first filter plate through a fixing rod, and the material extraction end of the upper end of the sliding tube is connected to the feed port of the material extraction pump through a material guide hose, and the discharge port of the material extraction pump is provided with a discharge pipe.

[0013] As a further solution of the present invention: a plurality of mounting holes are distributed in an array on the lower end surface of the inner ring of the piston ring, and supporting balls are provided in the mounting holes. The plurality of supporting balls form a rolling surface that is in pressure contact with the upper end surface of the sliding ring.

[0014] As a further solution of the present invention: the scraper assembly includes a sliding ring slidably arranged on the stirring shaft, and a rotation limiter is provided between the sliding ring and the stirring shaft to limit the rotation of the two. The scraper assembly also includes a connecting rod arranged on the side of the sliding ring, and the outer end of the connecting rod is provided with a first scraper plate that is in pressure contact with the inner wall of the box body, and the lower end of the first scraper plate extends into the telescopic hole inside the second scraper plate, and the telescopic hole is provided with a reset spring for connecting the first scraper plate and the second scraper plate.

[0015] As a further solution of the present invention: the second scraper plate and the outer side surface of the first scraper plate are arranged flush, and the cross-section of the telescopic hole is a T-shaped structure.

[0016] As a further solution of the present invention: the rotation limiter includes a limit protrusion arranged on the inner wall of the sliding ring, and the surface of the stirring shaft is provided with a limit groove matching the limit protrusion. The setting of the limit protrusion and the limit groove makes the sliding ring and the stirring shaft only slide relative to each other but not rotate relative to each other.

[0017] As a further solution of the present invention: the buffer support member includes legs distributed in an array on the lower end surface of the box body, the sliding sleeve at the lower end of the leg is provided with a support sleeve, the lower end of the support sleeve is provided with a support block for supporting the ground, and the support sleeve is provided with a shock-absorbing spring for connecting the bottom of the leg.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can achieve 95%-100% dissociation of valuable minerals in the grinding process, and effectively protect the particle size of the material, without causing over-grinding, to achieve on-demand directional grinding, saving energy consumption, the dissociated valuable minerals and gangue minerals are sorted by the heavy medium in the mill, the light minerals float up, and the heavy minerals sink, and the two can be separated in time and discharged from the mill, realizing the simultaneous grinding and sorting;

[0019] The present application utilizes a fluid grinding environment constructed by multiple steel balls and grinding powder, which can effectively lift light materials and sink heavy materials, thereby achieving the advantage of automatic separation of fluid grinding. The heavy medium liquid here can be configured with different densities as needed to separate materials of different specific gravities. The heavy medium liquid here will cause materials with a density less than that of the heavy medium liquid to float, while materials with a density greater than that of the heavy medium liquid will sink. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0022] Figure 3 It is a schematic structural diagram of the scraper assembly in the present invention.

[0023] Among them: box body 11, sliding ring 12, piston ring inner ring 13, first filter plate 14, feeding box 15, telescopic push rod 16, driving motor 17, sound insulation layer 18, sliding tube 19, suction pump 20, discharge pipe 21, first scraper plate 22, second scraper plate 23, return spring 24, unloading telescopic rod 25, second filter plate 26, storage box 27, discharge hopper 28, stirring shaft 29, shock-absorbing spring 30, support block 31, support leg 32, support sleeve 33, stirring blade 34, material guide hose 35. DETAILED DESCRIPTION

[0024] 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.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-3 In an embodiment of the present invention, a vertical heavy medium mill comprises a housing 11 and a buffer support member arranged at the lower end of the housing 11, a sound insulation layer 18 for reducing noise is arranged on the surface of the housing 11, a driving motor 17 is installed at the upper end of the housing 11, an output end of the driving motor 17 is connected and fixed to the upper end of a stirring shaft 29, a lower end of the stirring shaft 29 is rotatably connected to the bottom of the housing 11, stirring blades 34 for stirring materials are distributed on the stirring shaft 29, the interior of the housing 11 is filled with grinding balls and grinding powder for grinding materials, a feeding port and a feeding box 15 arranged at the feeding port are arranged on the upper right side of the housing 11, a scraping assembly for scraping off materials adhered to the inner wall of the housing 11 is also arranged on the stirring shaft 29, and a filtering assembly for discharging qualified grinding materials is also arranged on the housing 11;

[0028] The filter assembly includes a first filter element for filtering out light materials and a second filter element for filtering out heavy materials;

[0029] The second filter element includes a storage box 27 arranged on the left side of the box body 11, and a discharge hopper 28 for discharging materials is provided at the lower end of the storage box 27. A discharge port is provided on the surface of the box body 11 where the storage box 27 is located, and a second filter plate 26 for filtering heavy materials is provided at the discharge port. The outer side of the second filter plate 26 is connected to a discharge telescopic rod 25 for driving it to cooperate with the discharge port, and the discharge telescopic rod 25 is detachably connected to the return spring 24;

[0030] In actual use, the heavy materials mixed with the steel balls will be deposited at the bottom of the box 11, and with the cooperation of the scraper assembly, the qualified heavy materials will pass through the second filter plate 26, so that the qualified materials can be filtered out in time. After the grinding is completed, the second filter plate 26 can be driven away from the discharge port by the unloading telescopic rod 25, so that the steel balls inside the box 11 can be discharged;

[0031] The first filter element comprises a first filter plate 14 slidably arranged on the inner wall of the box body 11, an outer piston ring slidably matched with the inner wall of the box body 11 is arranged on the outer side of the first filter plate 14, an inner piston ring 13 matched with the outer side of the stirring shaft 29 is arranged on the inner side of the first filter plate 14, a telescopic push rod 16 for driving the first filter plate 14 to move up and down is connected to the upper end of the first filter plate 14, and a material extraction member for extracting light materials above the first filter plate 14 is arranged on the upper end of the first filter plate 14;

[0032] The material extraction member includes a sliding hole provided on the upper end surface of the box body 11, and a sliding tube 19 is slidably fitted in the sliding hole. The lower end of the sliding tube 19 is connected and fixed to the first filter plate 14 through a fixing rod, and the material extraction end at the upper end of the sliding tube 19 is connected to the feed port of the material extraction pump 20 through a material guide hose 35. The material discharge port of the material extraction pump 20 is provided with a discharge pipe 21. When in use, the material extraction pump 20 generates a suction force at the lower end of the sliding tube 19, thereby extracting the material passing through the first filter plate 14, and then the first filter plate 14 is driven to move downward by the telescopic push rod 16, thereby squeezing the material, so that the qualified part of the material passes through faster and is extracted by the material extraction member as soon as possible, which effectively improves the discharge efficiency. This feeding method also avoids the problem of being unable to discharge the material due to the height difference between the first filter plate 14 and the remaining material.

[0033] The lower end surface of the piston ring inner ring 13 is arrayed with a plurality of mounting holes, in which supporting balls are provided, and the plurality of supporting balls form a rolling surface that is pressed against the upper end surface of the sliding ring 12, thereby reducing the friction between the components;

[0034] The scraper assembly includes a sliding ring 12 slidably arranged on the stirring shaft 29, and a rotation limiter is provided between the sliding ring 12 and the stirring shaft 29 to limit the rotation of the two. The scraper assembly also includes a connecting rod arranged on the side of the sliding ring 12, and the outer end of the connecting rod is provided with a first scraper plate 22 that is pressed and contacted with the inner wall of the box body 11, and the lower end of the first scraper plate 22 extends into the telescopic hole inside the second scraper plate 23, and a return spring 24 for connecting the first scraper plate 22 and the second scraper plate 23 is provided in the telescopic hole. The second scraper plate 23 is flush with the outer side surface of the first scraper plate 22, and the cross-section of the telescopic hole is a T-shaped structure. The setting of this retractable scraper assembly avoids the problem of interference with the filter assembly in the later stage. Driven by the box body 11, the sliding ring 12 drives the first scraper plate 22 and the second scraper plate 23 to rotate through the connecting rod, thereby scraping the inner wall of the box body 11;

[0035] The rotation limiter comprises a limit protrusion arranged on the inner wall of the sliding ring 12, and a limit groove matching with the limit protrusion is arranged on the surface of the stirring shaft 29. The setting of the limit protrusion and the limit groove enables the sliding ring 12 and the stirring shaft 29 to slide relative to each other but not to rotate relative to each other;

[0036] The buffer support member includes a support leg 32 distributed in an array on the lower end surface of the box body 11, and a support sleeve 33 is provided on the sliding sleeve at the lower end of the support leg 32. A support block 31 for supporting the ground is provided at the lower end of the support sleeve 33. A shock-absorbing spring 30 for connecting the bottom of the support leg 32 is provided inside the support sleeve 33. In actual use, the support leg 32 can slide along the support sleeve 33, and the shock-absorbing spring 30 can absorb the impact force, thereby reducing the vibration generated by the device.

[0037] The working principle of the present invention is: in actual use, the grinding medium and the material to be ground are added into the box body 11 along the feeding box 15, and the stirring shaft 29 drives the stirring blade 34 to rotate under the drive motor 17, thereby driving the medium to mix with the material to be ground (the volume of the powder here is greater than the volume of the mesh). During the mixing process, the material will be ground and dissociated. Under the action of the heavy medium sorting force, the heavy material of the dissociated material will settle downward, and the qualified material will pass through the second filter plate 26, and then be stored in the storage box 27, and finally be discharged from the discharge hopper 28. The first filter plate 14 is driven downward by the telescopic push rod 16, and the light qualified material will float up and pass through the first filter plate 14, and then be sucked away by the suction piece. While stirring, the scraper component will scrape the inner wall of the box body 11. On the one hand, the inner wall of the box body 11 can be scraped, and on the other hand, the surface of the second filter plate 26 can be kept unblocked. During the grinding process, the heavy medium liquid filled inside will cause the material with a density lower than that of the heavy medium liquid to float, while the material with a density higher than that of the heavy medium liquid will sink.

[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A vertical heavy medium grinding mill, comprising a housing (11) and a buffer support member arranged at the lower end of the housing (11), a sound insulation layer (18) for reducing noise being arranged on the surface of the housing (11), a driving motor (17) being installed at the upper end of the housing (11), It is characterized in that The output end of the driving motor (17) is connected and fixed to the upper end of the stirring shaft (29); the lower end of the stirring shaft (29) is rotatably connected to the bottom of the box (11); stirring blades (34) for stirring the material are distributed on the stirring shaft (29); the interior of the box (11) is filled with grinding balls for grinding the material; a feeding port and a feeding box (15) arranged at the feeding port are provided on the upper right side of the box (11); a scraping assembly for scraping off material adhered to the inner wall of the box (11) is also provided on the stirring shaft (29); and a filtering assembly for discharging the ground material is also provided on the box (11); The filter assembly includes a first filter element for filtering out light materials and a second filter element for filtering out heavy materials; The first filter element comprises a first filter plate (14) slidably arranged on the inner wall of the box body (11); an outer piston ring slidably matched with the inner wall of the box body (11) is arranged on the outer side of the first filter plate (14); an inner piston ring (13) matched with the outer side of the stirring shaft (29) is arranged on the inner side of the first filter plate (14); a telescopic push rod (16) for driving the first filter plate (14) to move up and down is connected to the upper end of the first filter plate (14); a material extraction member for extracting light material above the first filter plate (14) is arranged on the upper end of the first filter plate (14); the first filter plate 14 is driven to move downward by the telescopic push rod 16, thereby squeezing the material; The material extraction member comprises a sliding hole formed on the upper end surface of the box body (11), a sliding tube (19) slidably fitted in the sliding hole, the lower end of the sliding tube (19) being connected and fixed to the first filter plate (14) via a fixing rod, the material extraction end at the upper end of the sliding tube (19) being connected to the feed port of a material extraction pump (20) via a material guide hose (35), and the material discharge port of the material extraction pump (20) being provided with a discharge pipe (21); The second filter element comprises a material storage box (27) arranged on the left side of the box body (11), a discharge hopper (28) for discharging materials is provided at the lower end of the material storage box (27), a material discharge port is provided on the surface of the box body (11) where the material storage box (27) is located, and a second filter plate (26) for filtering heavy materials is provided at the material discharge port, the outer side of the second filter plate (26) is connected to a discharge telescopic rod (25) for driving it to cooperate with the discharge port, and the discharge telescopic rod (25) and the return spring (24) are detachably connected; The scraper assembly comprises a sliding ring (12) slidably arranged on the stirring shaft (29), a rotation limiter for limiting the rotation of the sliding ring (12) and the stirring shaft (29) being arranged between the sliding ring (12) and the stirring shaft (29), the scraper assembly also comprises a connecting rod arranged on the side of the sliding ring (12), the outer end of the connecting rod being provided with a first scraper plate (22) pressed against the inner wall of the box body (11), the lower end of the first scraper plate (22) extending into a telescopic hole inside the second scraper plate (23), the telescopic hole being provided with a return spring (24) for connecting the first scraper plate (22) and the second scraper plate (23); The ore dressing method of the vertical heavy medium mill comprises: Grinding steel balls and materials to be ground are added into the box body (11) through the feeding box (15). The stirring shaft (29) is driven by the driving motor (17) to drive the stirring blades (34) to rotate, thereby driving the steel balls to mix with the materials to be ground. During the mixing process, the materials are ground, heavy materials are deposited downward, and qualified materials pass through the second filter plate (26) and are then stored in the storage box (27). Finally, they are discharged from the discharge hopper (28). The first filter plate (14) is driven downward by the telescopic push rod (16), and light qualified materials pass through the first filter plate (14) and are then sucked away by the suction member. While stirring, the scraping component scrapes the inner wall of the box body (11).

2. The vertical heavy medium mill according to claim 1, It is characterized in that The outer side surfaces of the second scraper plate (23) and the first scraper plate (22) are arranged flush with each other, and the cross-section of the telescopic hole is a T-shaped structure.

3. The vertical heavy medium mill according to claim 1, It is characterized in that The lower end surface of the piston ring inner ring (13) is provided with a plurality of mounting holes in an array, and supporting balls are provided in the mounting holes. The plurality of supporting balls form a rolling surface that is in pressure contact with the upper end surface of the sliding ring (12).

4. The vertical heavy medium mill according to claim 1, It is characterized in that The rotation limiting member comprises a limiting protrusion arranged on the inner wall of the sliding ring (12), and the surface of the stirring shaft (29) is provided with a limiting groove matching the limiting protrusion. The arrangement of the limiting protrusion and the limiting groove enables the sliding ring (12) and the stirring shaft (29) to only slide relative to each other but not to rotate relative to each other.

5. The vertical heavy medium mill according to claim 1, It is characterized in that The buffer support member comprises support legs (32) arranged in an array on the lower end surface of the box body (11); a support sleeve (33) is provided on the sliding sleeve at the lower end of the support leg (32); a support block (31) for supporting the ground is provided at the lower end of the support sleeve (33); and a shock absorbing spring (30) for connecting the bottom of the support leg (32) is provided inside the support sleeve (33).

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