IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0625523
(2012-09-24)
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등록번호 |
US-8777015
(2014-07-15)
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발명자
/ 주소 |
- Chappie, David
- Halverson, Martin J.
- Lehtinen, Lucas J.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
124 |
초록
▼
There are provided devices, systems and processes to treat slurries that include magnetic and nonmagnetic particles suspended in water in such a fashion as to separate certain valuable elements and/or minerals from less valuable minerals or elements. A high intensity magnetic separator includes at l
There are provided devices, systems and processes to treat slurries that include magnetic and nonmagnetic particles suspended in water in such a fashion as to separate certain valuable elements and/or minerals from less valuable minerals or elements. A high intensity magnetic separator includes at least one large rotatable turntable that defines at least one circular channel therethrough in which a matrix material is positioned. The turntable is configured to rotate in a generally horizontal plane about a generally vertical virtual axis, causing the at least one circular channel to rotate through a plurality of intermittent magnetic and nonmagnetic zones generated by a plurality of permanent magnet members. A treatment slurry is directed into the channel or channels in one or more of the magnetic zones as the turntable rotates. A tailings fraction passes through the channel or channels in a generally downward direction in the magnetic zones and is collected in tailings launders. Magnetic particles are attracted to the matrix material in the magnetic zones and remain in the channel until it passes into an adjacent nonmagnetic zone, where the magnetic particles are washed form the channel into concentrate launders.
대표청구항
▼
1. A system, comprising: a horizontally oriented rotor having a plurality of circular channels positioned thereon, each of said plurality of circular channels having a slurry-permeable floor and a discrete object matrix positioned therein, wherein the discrete object matrix comprises a plurality of
1. A system, comprising: a horizontally oriented rotor having a plurality of circular channels positioned thereon, each of said plurality of circular channels having a slurry-permeable floor and a discrete object matrix positioned therein, wherein the discrete object matrix comprises a plurality of magnetically susceptible shaped objects;a drive mechanism operationally coupled to the rotor;a first plurality of permanent magnet members rotationally independent from the rotor, wherein said permanent magnet members are positioned whereby a first of said circular channels is straddled by at least two of said permanent magnet members and a second of said circular channels is straddled by at least two of said permanent magnet members such that said permanent magnet members apply a magnetic field across the first circular channel over a first range of angular positions of the rotor and apply a magnetic field across the second circular channel over a second range of angular positions of the rotor;a first feed conduit structured to deliver a treatment slurry into the first channel within said first range of angular positions;a second feed conduit structured to deliver a treatment slurry into the second channel within said second range of angular positions;a plurality of water delivery conduits structured to deliver water into the first and second channels; anda launder assembly positioned beneath the rotor, said launder assembly operable to receive a tailings fraction beneath said first and second circular channels within the first and second ranges of angular positions of the rotor and to receive a concentrate fraction beneath said first and second circular channels outside the first and second ranges of angular positions of the rotor. 2. The system of claim 1, further comprising a plurality of radially oriented walls positioned vertically and dividing the first channel into a plurality of segments. 3. The system of claim 1, further comprising a jolting device structured to move at least one of the shaped objects within the circular channel. 4. The system of claim 3, wherein the jolting device comprises a jump magnet. 5. A high intensity magnetic separation device for separating a treatment slurry including magnetic particles and nonmagnetic particles suspended in water into a concentrate fraction and a tailings fraction, said device comprising: a generally horizontal rotor rotatable about a generally vertical axis, said rotor defining a plurality of circular channels rotatable about the axis, said each of said plurality of channels defining a flow path through said first rotor and containing a matrix material therein, and configured to allow passage of a downwardly moving slurry therethrough in contact with the matrix material;a driver operable to rotate said rotor;a plurality of permanent magnet sets, each of said sets operable to apply a magnetic field across the plurality of channels within a sector of said rotor to provide a magnetic zone, each sector being separated from each of two other sectors by a nonmagnetic zone, thereby providing a repeating series of magnetic zones and nonmagnetic zones across said plurality of channels;a first plurality of feed conduits for delivering a treatment slurry into said plurality of channels at a plurality of input locations, each input location being positioned within one of the magnetic zones;a first plurality of water delivery conduits for delivering water into said plurality of channels at a plurality of locations within the magnetic zones and within the nonmagnetic zones; anda plurality of tailings launders and a plurality of concentrate launders positioned beneath said plurality of channels; said tailings launders positioned beneath said magnetic zones for receiving a tailings fraction of the treatment slurry that passes through said plurality of channels in said magnetic zones; and said concentrate launders positioned beneath said nonmagnetic zones for receiving a concentrate fraction of the treatment slurry that passes through said plurality of channels in said nonmagnetic zones. 6. The device in accordance with claim 5 wherein each of said permanent magnet sets comprises a plurality of permanent magnet members positioned to straddle each of said plurality of channels. 7. The device in accordance with claim 5 wherein said rotor further comprises a foraminous channel floor operable to allow passage of the tailings fraction and the concentrate fraction therethrough. 8. The device in accordance with claim 7 wherein said matrix material comprises a plurality of discreet magnetically susceptible objects sized to be retained in said first channel by said channel floor. 9. The device in accordance with claim 7 wherein said rotor further comprises a plurality of vertical radial separating walls in said plurality of channels, said separating walls dividing each of said channels into a plurality of arc-shaped channel segments, and wherein at least one of said channel segments contains a plurality of said discreet magnetically susceptible objects. 10. The device in accordance with claim 9 wherein each of said channel segments contains a plurality of discreet magnetically susceptible objects. 11. The device in accordance with claim 7 wherein said magnetically susceptible objects comprise a material selected from the group consisting of steel, iron and an iron alloy. 12. The device in accordance with claim 11 wherein said magnetically susceptible objects comprise one or more members selected from the group consisting of shot, hex nuts, bolts, nails, washers, rod segments, cubes, blocks, cylinders, wire pieces, wire stars and pieces of wire mesh. 13. The device in accordance with claim 5, further comprising a plurality of jump magnets positioned adjacent said first channel at a trailing edge of a plurality of said magnetic zones relative to the rotation of said first rotor. 14. A method, comprising: positioning a plurality of magnetically susceptible shaped objects into a plurality of circular channels rotationally coupled to a horizontal rotor, each of said circular channels operable to rotate in a rotational path having a plurality of magnetized portions, each magnetized portion separated from each of two other magnetized portions by a nonmagnetized portion;passing a treatment slurry through a magnetized portion of a rotational path of at least one of the circular channels;removing a tailings fraction from the treatment slurry in the magnetized portion of the rotational path of at least one of the circular channels; andremoving a concentrate fraction from the treatment slurry in the non-magnetized portion of the rotational path of at least one of the circular channels. 15. The method of claim 14, further comprising moving the magnetically susceptible shaped objects within the circular channel. 16. The method of claim 15, wherein the moving comprises positioning a jump magnet in proximity to the circular channel. 17. The method of claim 14, where the treatment slurry comprises non-magnetic particles and weakly magnetic particles. 18. The method of claim 17, where the non-magnetic particles comprise silica and the weakly magnetic particles comprise iron minerals other than magnetite. 19. The method of claim 14, where the mixture of particles comprise non-magnetic particles of silica, strongly magnetic particles of magnetite, and weakly magnetic particles of hematite. 20. The method of claim 14, where the magnetic particles comprises iron oxides. 21. The method of claim 14, where the magnetic particles comprises hematite and magnetite. 22. The method of claim 21, where the magnetically susceptible shaped objects comprise a plurality of members selected from the group consisting of steel shot and iron shot. 23. The method of claim 14, further comprising pretreating said treatment slurry prior to said passing on a wet screen to separate and reject from said treatment slurry particles larger than 700 microns from particles smaller than 700 microns which smaller particles remain with said mixture. 24. The method of claim 14, further comprising removing strongly magnetic particles from said treatment slurry prior to said passing by treating said mixture with a low intensity conventional wet magnetic separator drum to separate strongly magnetic particles from non-magnetic and weakly magnetic particles which remain with said mixture. 25. The method of claim 14, further comprising removing excess fluid from the treatment slurry by pumping said treatment slurry through a hydro-cyclone with the underflow of the hydro-cyclone comprising the treatment slurry and the overflow of the hydro-cyclone being discarded as excess fluid.
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