阅读说明：本技术 磁性滚筒分离器 (Magnetic roller separator ) 是由 张术军 于 2020-07-16 设计创作，主要内容包括：磁性滚筒分离器包括能够相对于框架围绕轴线转动的滚筒,其中,滚筒包括内部腔室和在滚筒的端部处的开口,该开口提供进入内部腔室的通路。磁性滚筒分离器还包括用于将液体或粒状物质穿过在滚筒的端部处的开口供应到内部腔室中的入口、布置在滚筒的外部的用于朝向内部腔室的内部侧壁吸引包括在液体或粒状物质中的磁性材料的磁体、用于回收被吸引到内部侧壁的磁性材料的至少一部分的收集装置及附接到滚筒的端部的环形密封构件,其中环形密封构件在使用中与滚筒一起转动。磁性滚筒分离器还包括挡板,该挡板抵靠环形密封构件且部分密封在滚筒的端部处的开口。多个腔形成在环形密封构件中,腔适于接收泄漏到环形密封构件和挡板之间的边界中的流体。(The magnetic drum separator comprises a drum rotatable relative to a frame about an axis, wherein the drum comprises an interior chamber and an opening at an end of the drum that provides access to the interior chamber. The magnetic drum separator further comprises an inlet for supplying liquid or granular matter into the interior chamber through an opening at an end of the drum, a magnet arranged outside the drum for attracting magnetic material comprised in the liquid or granular matter towards an interior sidewall of the interior chamber, a collecting device for recovering at least a portion of the magnetic material attracted to the interior sidewall, and an annular sealing member attached to the end of the drum, wherein the annular sealing member rotates with the drum in use. The magnetic drum separator also includes a baffle that abuts the annular sealing member and partially seals the opening at the end of the drum. A plurality of cavities are formed in the annular sealing member, the cavities adapted to receive fluid that leaks into a boundary between the annular sealing member and the baffle.)

1. A magnetic drum separator, the magnetic drum separator comprising:

a drum rotatable about an axis relative to a frame, wherein the drum comprises an interior chamber and an opening at an end of the drum that provides access to the interior chamber;

an inlet for supplying liquid or particulate matter into the interior chamber through the opening at the end of the drum;

a magnet disposed outside the drum for attracting a magnetic material included in the liquid or granular substance toward an inner sidewall of the inner chamber;

a collection device for recovering at least a portion of the magnetic material attracted to the interior sidewall;

an annular sealing member attached to the end of the drum, wherein the annular sealing member rotates with the drum in use; and

a baffle abutting the annular sealing member and partially sealing the opening at the end of the drum,

wherein a plurality of cavities are formed in the annular sealing member, the plurality of cavities adapted to receive fluid leaking into a boundary between the annular sealing member and the baffle.

2. The magnetic drum separator according to claim 1 wherein the annular sealing member comprises an inwardly facing circular wall, wherein the plurality of cavities are formed in the inwardly facing circular wall, and the baffle comprises a rearmost portion that abuts the inwardly facing circular wall.

3. The magnetic drum separator according to claim 2, wherein the rearmost portion of the baffle slopes downwardly toward the interior chamber.

4. The magnetic drum separator according to claim 1, wherein the baffle seals a lowermost section of the opening at the end of the drum.

5. The magnetic drum separator according to claim 4, wherein said baffle is dimensioned such that it seals the lowermost semi-circular section of the opening at the end of the drum.

6. The magnetic drum separator according to claim 1, wherein the baffle comprises an outlet for extracting non-magnetic material included in the liquid or particulate matter from the internal chamber.

7. The magnetic drum separator according to claim 1 wherein the magnets extend at least partially circumferentially about the axis along an arcuate path.

8. The magnetic roller separator according to claim 7 wherein the arcuate path extends from a start position to an end position and the collecting means collects the magnetic material moving through the roller towards the end position.

9. The magnetic drum separator according to claim 8, wherein the magnetic drum separator comprises water jets that spray water onto the interior sidewall to move the magnetic material from the interior sidewall into the collection device.

10. The magnetic drum separator according to claim 8, wherein the end position is disposed above the start position and the collecting means is disposed below the end position in the interior chamber.

11. The magnetic drum separator according to claim 10, wherein the collecting means comprises a trough.

12. The magnetic drum separator according to claim 11 wherein the slot is elongated and extends longitudinally along the axis.

13. The magnetic drum separator according to claim 12 wherein the slot is sloped downwardly towards the opening at the end of the drum.

14. The magnetic drum separator according to any of the preceding claims, wherein the inlet is adapted to convey slurry into the internal chamber and the drum is dimensioned such that a pool of slurry is formed in the bottom of the internal chamber.

15. The magnetic drum separator according to claim 1, wherein the magnetic drum separator comprises:

a pair of openings providing the passage to the interior chamber from opposite ends of the drum; and

a pair of collection devices entering the interior chamber from the opposite ends of the drum to collect the magnetic material.

Technical Field

The present invention relates to mineral processing and, more particularly, to magnetic drum separators.

Background

Magnetic drum separators are used in mineral processing lines to remove iron particles and other metal contaminants suspended in a slurry. The drum separator may also be used to separate magnetic material from non-magnetic material combined in a solid based mixture.

Magnetic drum separators typically comprise a hollow cylindrical drum that is rotated about an axis by an electric motor. A large magnet (usually a permanent magnet) is arranged in the inner chamber of the drum, which is held stationary with respect to the drum. The substance consisting of magnetic material and non-magnetic material is fed towards the curved outer surface of the drum through a pipe, channel or similar conduit extending from the feed hopper to the surface. The cabinet is disposed proximate the drum and includes an arcuate surface extending around the curved surface portion of the drum. The box is positioned a short distance from the surface so that a curved channel is formed between the surface of the drum and the box.

The magnetic material in the substance is attracted toward the outer surface of the drum by the constant magnetic field of the internal magnet. As the drum rotates, the magnetic material moves with the outer surface of the drum through the curved path between the drum and the cabinet. The magnetic material is transported around the drum to a collection point located near the outer boundary of the magnetic field. The magnetic material falls from the drum via a conduit or outlet pipe arranged at the collection point. The non-magnetic particles are discharged as debris from various locations around the drum, usually towards the lowermost end of the drum.

Magnetic drum separators of this configuration have several drawbacks. For example, coarse particles and debris may often be trapped between the surface of the drum and the outer box of the drum, which can impede the rotation of the drum and wear and damage the surface of the drum. Coarse particles may also become trapped at the point where the magnetic material collects and block the flow of such material into the outlet tube.

Furthermore, because the magnets are positioned inside the drum, it is difficult to detect and correct these problems if the magnets become loose, damaged, or misaligned during use. It is also difficult to adjust the magnet declination alignment. Furthermore, the processing capacity of the drum separator is limited because the magnetic material and debris are only withdrawn from a single location around the drum.

Against this background, there is a need for an improved magnetic drum separator.

Disclosure of Invention

According to the present invention, there is provided a magnetic drum separator comprising:

a drum rotatable about an axis relative to a frame, wherein the drum comprises an interior chamber and an opening at an end of the drum that provides access to the interior chamber;

an inlet for supplying liquid or particulate matter into the interior chamber through the opening at the end of the drum;

a magnet disposed outside the drum for attracting a magnetic material included in the liquid or granular substance toward an inner sidewall of the inner chamber;

a collection device for recovering at least a portion of the magnetic material attracted to the interior sidewall;

an annular sealing member attached to the end of the drum, wherein the annular sealing member rotates with the drum in use; and

a baffle abutting the annular sealing member and partially sealing the opening at the end of the drum,

wherein a plurality of cavities are formed in the annular sealing member, the plurality of cavities adapted to receive fluid leaking into a boundary between the annular sealing member and the baffle.

The annular sealing member may comprise an inwardly facing circular wall, wherein the plurality of cavities are formed in the inwardly facing circular wall and the barrier comprises a rearmost portion that abuts the inwardly facing circular wall.

The rearmost portion of the baffle may be inclined downwardly towards the interior chamber.

The baffle may seal a lowermost section of the opening at the end of the drum.

The baffle may be dimensioned such that the baffle seals a lowermost semi-circular section of the opening at the end of the drum.

The baffle may include an outlet for extracting the non-magnetic material included in the liquid or granular substance from the inner chamber.

The magnet may extend at least partially circumferentially about the axis along an arcuate path.

The arcuate path may extend from a start position to an end position, and the collecting means may collect the magnetic material moving through the drum towards the end position.

The magnetic drum separator may comprise a water spray that sprays water onto the interior sidewall to move the magnetic material from the interior sidewall into the collection device.

The end position may be disposed above the start position and the collection device is disposed below the end position in the interior chamber.

The collecting means may comprise a trough.

The slot may be elongate and extend longitudinally along the axis.

The slot may be inclined downwardly towards the opening at the end of the drum.

The inlet may be adapted to convey slurry into the internal chamber, and the drum may be dimensioned such that a pool of slurry is formed in the bottom of the internal chamber.

The inlet may comprise a pipe for conveying the slurry into the internal chamber.

The tube may include an elongate slot extending longitudinally along the tube, wherein the slurry exits the elongate slot towards the inner sidewall.

The pipe may include a channel in fluid communication with the elongated slot for directing the slurry from the elongated slot toward the interior sidewall.

The magnetic drum separator may include a pair of openings providing the passageway to the interior chamber from opposite ends of the drum.

The magnetic drum separator may include a pair of collecting devices that collect the magnetic material from the opposite ends of the drum.

The magnetic drum separator may include a pair of water jets operably configured to spray water onto the interior sidewall to move the magnetic material from the interior sidewall into the pair of collection devices.

Drawings

Embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

FIG. 1 is a perspective view of a magnetic drum separator according to an exemplary embodiment of the present invention;

FIG. 2 is a front view of the magnetic drum separator;

FIG. 3 is a plan view of the magnetic drum separator with the internal chamber of the magnetic drum separator shown in partial section; and

fig. 4 is a partial perspective view of a baffle included in a magnetic drum separator according to another exemplary embodiment of the present invention.

Detailed Description

Referring to fig. 1 to 3, an exemplary embodiment of the present invention provides a magnetic drum separator 10, the magnetic drum separator 10 comprising a drum 12 rotatable about an axis 14, wherein the drum 12 comprises an inner chamber 16, an inlet 18 for supplying liquid or granular substances into the inner chamber 16, and a magnet 20 arranged outside the drum 12 for attracting magnetic material comprised in the substances towards an inner side wall of the inner chamber 16. The magnetic drum separator 10 further comprises a collecting device 22, which collecting device 22 collects at least a portion of the magnetic material attracted to the inner side wall when the drum 12 rotates.

More particularly, in the depicted example, the magnetic drum separator 10 is primarily adapted to separate magnetic material included in slurries and similar fluid mixtures. For example, the magnetic drum separator 10 may be used to treat a slurry consisting of iron contaminants suspended in water, as is commonly disposed in mineral processing lines. In other examples, the magnetic drum separator 10 may be adapted to separate magnetic material included in solid or granular matter, such as miscellaneous iron mixed with rock particles.

The drum 12 may comprise a hollow cylindrical container having a shaft 24, the shaft 24 extending longitudinally through the center of the container aligned with the axis of rotation 14 of the drum 12. The shaft 24 may be rotatably supported by a frame 26 of the magnetic drum separator 10. The frame 26 may comprise a rectangular base having a pair of diagonally extending support arms 28 connected at each end of the base in a triangular arrangement. The two sets of support arms 28 may support the shaft 24 in a substantially horizontal alignment.

The drum 12 may be secured to the shaft 24 by a plurality of spokes 30, the plurality of spokes 30 extending radially from the center of the shaft 24 to the interior sidewall of the chamber 16. The length of each spoke 30 matches the radius of the cylindrical cross-section of the chamber 16. The shaft 24 and the drum 12 may be rotated by an electric motor and gear assembly (not shown) connected to one or both ends of the shaft 24. The drum 12 may be composed of a non-ferromagnetic material, such as aluminum, that does not shield or affect the magnetic field of the magnets 20.

An annular seal member 32 may be provided at each end of the drum 12 that is axially aligned with the shaft 24. Each seal member 32 may be statically secured to the drum 12 (e.g., each seal member 32 may be welded to the drum 12) such that during use, the seal members 32 rotate with the drum 12. The annular sealing member 32 may include an inwardly facing circular wall including a plurality of cavities 33 formed therein. The cavity 33 may comprise box-shaped cavities arranged at regularly spaced intervals around a circular wall.

A semi-circular baffle 34 may also be provided at each end of the drum 12. Each baffle 34 may partially seal a respective end of the drum 12 such that the opening above the baffle 34 provides access to the interior chamber 16 from outside the drum 12. The baffle 34 may be fixedly attached to the frame 26 such that, during use, the drum 12 rotates relative to the baffle 34. The baffle 34 abuts the rotating annular sealing member 32 and ensures that the lowermost semi-circular section of the end of the drum 12 remains fluid-tight during use, thereby preventing fluid from flowing out of the drum 12 from the internal chamber 16. In the depicted example, the rearmost portion 34(a) of the baffle 34 extends into the drum 12. The rearmost portion 34(a) may be semi-circular in shape and include an outermost curved surface that abuts against and is flush with the inwardly facing circular wall of the annular seal member 32. The inlet to the cavity 33 of the sealing member 32 is against the boundary formed between the circular wall of the sealing member 32 and the outermost curved surface of the rearmost portion 34 (a).

Each baffle 34 may comprise an outlet 35 for extracting non-magnetic material comprised in the slurry supplied into the drum 12 via the inlet 18. The outlet 35 may comprise a circular hole formed in the baffle 34 at a location outside of the magnetic field of influence of the magnet 20.

The inlet 18 may be a conduit comprising an elongate tube extending inwardly into the interior chamber 16 from an opening at the end of the drum 12. The tube 18 may extend through the chamber 16 and terminate at a location substantially at the center of the chamber 16. In use, slurry may be directed under pressure into the pipe 18 using a pump and hose arrangement (not shown) connected to the inlet end of the pipe 18 at the open end of the drum 12. The tube 18 may include an elongated slot extending longitudinally along the tube 18 from which pressurized slurry may flow uniformly from the tube 18 toward the interior sidewall of the drum 12. A channel member 36 in fluid communication with the elongated slot may be attached to the tube 18 and carry the slurry toward the sidewall. The channel member 36 may include a rectangular chute disposed perpendicular to the circumferential surface of the tube 18. The chute 36 may include an internal bore that extends through the chute 36 from a side of the chute 36 facing the elongated slot of the tube 18 to an opposite side of the chute 36 facing the internal sidewall. The tube 18 may be attached to a support arm 28 of the frame 26 by one or more struts that support the tube 18 in a stationary position as the drum 12 rotates.

The magnet 20 may include an arcuate body made of ferromagnetic material that extends at least partially circumferentially about the axis 14. The magnets 20 may include permanent magnets fixedly attached to a frame 26, the frame 26 maintaining the magnets 20 held stationary as the drum 12 rotates. In other examples, magnet 20 may comprise an electromagnet. As best shown in fig. 2, the magnet 20 may be arranged such that the arcuate path of the body of the magnet 20 extends approximately 135 degrees about the axis 14 from the start position 38 to the end position 40. The starting position 38 may be positioned directly below the lowest point of the drum 12, and the ending position 40 may be disposed to one side of the drum 12 above the starting position 38. In this arrangement, the magnet 20 causes magnetic material included in the slurry flowing into the internal chamber 16 via the chute 36 to be attracted towards the rotating internal side wall of the chamber 16 and then move upwardly through the side wall towards the end position 40.

In other examples, the arcuate path of the magnet 20 may extend around the axis 14 by different angular degrees. Preferably, the path may extend at least 100 degrees about the axis 14 from the start position 38 to the end position 40. It will be appreciated that, more generally, the position and angular orientation of the magnet 20 relative to the drum 12 may be adjusted such that the magnetic field of the magnet 20 is adapted to the operating parameters of the magnetic drum separator 10, including operating parameters relating to the particular type of slurry or material being supplied to the magnetic drum separator 10. For example, the position and/or angular orientation may be adjusted to suit the average viscosity, composition, density and weight of the input material, or to suit the desired operating speed and throughput processing capacity of the magnetic drum separator 10.

The collection device 22 may be a trough including an elongated receptacle that is substantially semi-circular in cross-section and extends longitudinally through the interior chamber 16. More particularly, slot 22 may be disposed in interior chamber 16 such that a longitudinal axis of slot 22 is disposed below a location in chamber 16 proximate end location 40. In this arrangement, the trough 22 collects magnetic material which is moved upwardly by the drum 12 towards the end position 40 and then falls under gravity from the inner side wall. The trough 22 may be attached to the tube 18 by one or more struts that maintain the trough 22 stationary as the drum 12 rotates. The trough 22 may be oriented such that the longitudinal axis of the trough 22 is gradually inclined downwardly toward the open end of the drum 12. Thus, the magnetic material falling into the slot 22 is caused to flow under gravity along the slot 22 towards the open end of the chamber 16 so that the magnetic material can be extracted from the drum 12.

The magnetic drum separator 10 may also include a water jet 42 positioned inside the drum 12, the water jet 42 ejecting a water jet 44 onto the interior sidewall of the drum 12. The water jets 44 assist in removing magnetic material from the interior sidewalls so that material is effectively deposited into the grooves 22. The water jets 42 may comprise elongated conduits extending inwardly into the interior chamber 16 from openings at the end of the drum 12. The conduit 42 may be disposed above the inlet tube 18 and terminate at a location substantially at the center of the chamber 16. The conduit 42 may be attached to the inlet duct 18 by one or more struts that maintain the conduit 42 stationary as the drum 12 rotates. The water may be directed under pressure into the conduit 42 using a pump and hose arrangement (not shown) connected to the inlet end of the conduit 42 at the open end of the drum 12. The conduit 42 may comprise an elongate channel extending longitudinally along the side of the conduit 42 from which, in use, a jet of pressurized water is emitted towards the interior side wall of the drum 12.

Referring to fig. 3, in the depicted example, the magnetic drum separator 10 includes a pair of inlet pipes 18. The tubes 18 are symmetrically arranged and allow slurry to be fed into the inner chamber 16 from both ends of the drum 12. A pair of troughs 22 are also provided, the pair of troughs 22 enabling the magnetic material included in the slurry to be collected from both ends of the drum 12. A pair of water jets 42 is also provided, the pair of water jets 42 spraying two pressurized water jets 44 onto the inner side wall of the drum 12 to assist in moving the magnetic material into the slots 22.

In use, the drum 12 rotates about its axis 14 and slurry can be fed into the inner chamber 16 via a pair of inlet pipes 18. The slurry flows out uniformly towards the inner side wall of the chamber 16 via a rectangular chute 36 extending outwardly from the inlet pipe 18. The magnetic material included in the slurry is attracted by the magnets 20 towards the inner side wall and then lifted by the travelling side wall towards the collection trough 22. When the material has moved to a position where the magnetic field strength of the magnet 20 about the axis 14 is negligible, the water jets emitted from the water jets 42 eject the magnetic material away from the sidewalls and into the slots 22. The magnetic material then flows along the downwardly inclined slots 22 towards the outermost ends of the slots 22 so that the material can be withdrawn from the drum 12.

Any magnetic material that is not deposited into the trough 22 falls to the bottom of the drum 12 and forms a pool. The magnetic material in the slurry pool is attracted back towards the inner side wall of the drum 12 by the magnets 20 and, therefore, is advantageously recycled. Any residue included in the slurry that is not attracted (or is only attracted by negligible force) towards the magnet 20 remains in the slurry pool at the bottom of the drum 12. Unwanted debris can be extracted from the drum 12 via two circular openings 35 provided in the baffle 34.

Each baffle 34 abuts a respective annular sealing member 32 and serves to seal the end of the drum 12 against fluid leakage. In the event that any fluid seeps into the boundary between the baffle 34 and the respective annular seal member 32, the fluid flows into one or more cavities 33 in the inwardly facing circular wall of the seal member 32. The fluid collected in the chamber 33 is carried upwards along a circular path towards the top end of the drum 12. Eventually, the fluid flows out of the cavity 33 and falls back into the internal chamber 16 of the drum 12. The rearmost portion 34(a) of the baffle 34 may be inclined downwardly towards the interior chamber 16 so that any fluid falling onto the rearmost portion 34(a) does not flow back into the chamber 16.

The magnetic drum separator 10 enables magnetic and non-magnetic materials included in the slurry to be separated from each other in a fast and efficient manner. The magnetic drum separator 10 advantageously avoids problems associated with possible clogging of coarse particles and debris in drum separators using internally mounted magnets. Furthermore, because the magnet 20 is disposed on the exterior of the drum 12, it is advantageously easy to detect and correct these problems if the magnet 20 becomes loose, damaged, or misaligned during use. It is also advantageous that it is simple to adjust the angular alignment of the magnet 20 relative to the axis of rotation 14 of the drum 12. Furthermore, because the magnetic material and debris are withdrawn from the locations 22, 35 at both ends of the drum 12, the maximum processing capacity of the drum separator is substantially twice that which can be achieved when using a drum separator with internally mounted magnets. The cavity 33 in the annular sealing member 32 advantageously removes any liquid that may accidentally seep into the boundary between the sealing member 32 and the baffle 34. This liquid is recovered by the chamber 33 and transferred back into the internal chamber 16 so that the liquid can be processed repeatedly.

Referring to fig. 4, in other examples, the baffle 34 may include a first segment 46 joined to a second segment 48. The first section 46 may include a groove that is semi-circular in cross-section and extends from the drum 12. The last semi-circular section (not shown) of the groove 46 may extend into the central bore of the annular seal member 32 and abut the inwardly facing circular wall of the seal member 32. The rearmost portion may be flush with the circular wall such that the rearmost portion seals the boundary between the rearmost portion and the circular wall (and, thus, substantially seals the interface between the sealing member 32 and the baffle 34). The second section 48 may include an annular collar that extends circumferentially around the semi-circular groove 46. The collar 48 may be flat and abut the forwardmost annular face of the sealing member 32. The collar 48 also serves to seal the interface between the seal member 32 and the baffle 34.

Embodiments of the present invention provide a magnetic drum separator for separating magnetic material included in a liquid slurry and solid-based mixtures and substances.

For the purposes of this specification, the word "comprising" means "including but not limited to", and the word "comprising" has a corresponding meaning. It will be understood that, if any prior art is referred to herein, such reference does not constitute an admission that the prior art forms part of the common general knowledge in the art in australia or any other country.

The above embodiments have been described by way of example only and may be modified within the scope of the following claims.