CA1318897C - Particle separating apparatus - Google Patents
Particle separating apparatusInfo
- Publication number
- CA1318897C CA1318897C CA000573178A CA573178A CA1318897C CA 1318897 C CA1318897 C CA 1318897C CA 000573178 A CA000573178 A CA 000573178A CA 573178 A CA573178 A CA 573178A CA 1318897 C CA1318897 C CA 1318897C
- Authority
- CA
- Canada
- Prior art keywords
- container
- chamber
- axis
- disposed
- rotation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002245 particle Substances 0.000 title claims abstract description 25
- 239000013618 particulate matter Substances 0.000 claims abstract description 23
- 239000003381 stabilizer Substances 0.000 claims abstract description 11
- 239000011236 particulate material Substances 0.000 claims abstract description 10
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 23
- 238000004891 communication Methods 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 abstract description 4
- 238000009827 uniform distribution Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 description 15
- 229910052500 inorganic mineral Inorganic materials 0.000 description 10
- 239000011707 mineral Substances 0.000 description 10
- 238000005056 compaction Methods 0.000 description 7
- 239000002699 waste material Substances 0.000 description 6
- 241001417527 Pempheridae Species 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/003—Separation of articles by differences in their geometrical form or by difference in their physical properties, e.g. elasticity, compressibility, hardness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
- B07B13/10—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A particle separating apparatus is disclosed comprising a particle container. The particle container has an interior wall which defines a particle receiving chamber. The container has an opening exposing the chamber. The container is mounted to rotate about an axis generally coaxial with an axis of the opening. A
conduit is provided for admitting a flow of particulate matter into the chamber through the opening. A plura-lity of apertures extend generally radially from the interior and through the container. Stabilizing mecha-nisms in the form of stabilizer blades are provided within the chamber with cushioned edges disposed closely adjacent to the interior wall with the edges extending generally parallel to the axis of rotation. A lifting mechanism is disposed within the chamber having lifting plates disposed to rotate within the chamber and urge particulate material from a closed end of the chamber toward the opening and promote uniform distribution axially within the interior of the container.
A particle separating apparatus is disclosed comprising a particle container. The particle container has an interior wall which defines a particle receiving chamber. The container has an opening exposing the chamber. The container is mounted to rotate about an axis generally coaxial with an axis of the opening. A
conduit is provided for admitting a flow of particulate matter into the chamber through the opening. A plura-lity of apertures extend generally radially from the interior and through the container. Stabilizing mecha-nisms in the form of stabilizer blades are provided within the chamber with cushioned edges disposed closely adjacent to the interior wall with the edges extending generally parallel to the axis of rotation. A lifting mechanism is disposed within the chamber having lifting plates disposed to rotate within the chamber and urge particulate material from a closed end of the chamber toward the opening and promote uniform distribution axially within the interior of the container.
Description
PARTIC~E SEPARATING APPAI~ATUS
I. Field of the Invention .
This invention relates to apparatus for separating particulate matter. More particularly, this invention per-tains to apparatus for centrifugally separating particulate matter.
II. Descri~tion of the Prior Ar~
~requently, it is desirable to separate particulate matter based on mass. One means of performing such separa-tion is through centrifugal separation. An example of such a separating apparatus is shown in U.S. patent 3,969,224 to Cerbo dated July 13, 1976.
Centrifugal separation of particulate matter will be desirable in numerous instances. For example, in mineral processing, valuable minerals frequently have a specific gra-vity greater than a specific gravity of the ore material with which the mineral is associated. By crushing the ore and mineral into generally uniform size, the ore and mineral may be separated through centrifugal separation. Centrifugal separation is particularly useful in such mineral processing since centrifugal separation can frequently be used as a dry process. This has particular advantages for uses in regions where water is scarce.
A very importan~ u~e of centrifugal processing would be in separating grains from waste material. In the Fall, centrifugal separators can be used to clean away the lighter fine material. In Spring, such separators can be used to separate the best kernels which are usually heavier than lesser grade kernels. The heavier kernels are a pre-ferred seed.
~L
q~
~ 3 ~ 7 It is an object of an aspect of the present invention to provide a centrifugal separator apparatus which can be used for a wide variety of particulate separation. It is an object of an aspect of ~he present invention to provide such an apparatus which ma~ be used with particulate material which is susceptible to caking. It is an object of an aspect; of the present invention to overcome problems encountered with prior art centrifugal separators. Namely, previous attempts to separate particulates using centrifugal force have been inefficient and impractical since the centrifugal force within the dispersion chamber results in the bridging of the particulate material across the apertures.
SUMMARY OF THE INVENTION
According to a preferred embodiment of the present invention, there is provided a particulate separating apparatus which includes a particle container having an interior wall which defines a particle receiving chamber. The container has an opening which exposes the chamber. The container is mounted to rotate about an axis generally coaxial with the axis of the chamber opening. A conduit is provided for admitting a flow of particulate matter into the chamber through the opening.
; A plurality of apertures are formed through the container in particulate flow communication with the chamber. The apertuxes extend generally radially from the axis of rotation. Separating apparatus includes stabilizing means disposed within the chamber for preventing the rotation of the particulate matter as the container rotates.
Other aspect of the invention are as follows:
A particle separating apparatus comprising:
a particle container having an interior wall defining a particle receiving chamber, said container having an opening exposing said chamber;
mounting means for mounting said container to rotate about an axis generally coaxial with an axis of said opening;
2a conduit means for admitting a flow of particulate matter into said chamber through said opening;
means fo.r defining a plurality of apertures extending generally radiallv through said wall with each of said apertures in particulate flow communication with said chamber; and stabilizing means for abating rotational movement of partlculate matter within said container as said container rotates, said stabilizing means including blocking walls extending generally transverse to a direction of rotation of said container, said container being movable relative to the blocking walls~
A particle separating apparatus comprising:
a particle container having an interior wall defining a particle receiving chamber, said container having an opening exposing said chamber;
mounting means for mounting said container to rotate about an axis generally coaxial with an axis of said opening;
~0 conduit means for admitting a flow of particulate matter into said chamber through said opening;
means for defining a plurality of apertures extending generally radially through said wall with each of said apertures in particulate flow communication with 5 said interior;
stabilizing means for abating rotational movement of particulate matter within said container as said container rotates; and lifting means rotatably disposed within said chamber to lift particulate material away from a bottom portion of said chamber and urge said material axially away from said bottom portion.
A particle separating apparatus comprising:
a container having cylindrical interior wall defining a chamber with an opening generally coaxial with a cylindrical axis of said interior wall;
~ 3 ~
2b a rotary shaft disposed for rotation about a generally vertical axis of rotation;
connecting means for connecting said container to said sha~t with said cylindrical axis being coaxial with said axis of rotation and with said opening disposed facing upwardly;
a stationary feed tube having a free end disposed to direct a flow of particulate matter from said tube into said chamber through said opening;
a plurality of apertures formed through said container and extending generally radial to said axis of rotation;
a plurality of stabilizer blades disposed within said chamber with said blades having longitudinal dimensions generally parallel to said axis of rotation, said blades having edges disposed closely adjacent said interior wall, said blades extending generally trans-verse to a direction of rotation of said container, said container being movable relative to said blades.
- A particle separating apparatus comprising:
a container having a cylindrical interior wall defining a chamber with an opening generally coaxial with a cylindrical axis of said interior wall;
a rotary shaft disposed for rotation about a generally vertical axis of rotation;
connecting means for connecting said container to said shaft with said cylindrical axis being coaxial with said axis of rotation and with said op~ning disposed facing upwardly;
a stationary feed tube having a free end disposed to direct a flow of particulate matter from said tube into said chamber through said opening;
a plurality of apertures formed through said container and extending generally radial to saicl axis of rotation;
a plurality of stabilizer blades disposed within said chamber with said blades having longitudinal dimensions generally parallel to said axis o~ rotation, r~.
~., J ~
~3~ 7 2c said blades having edges disposed closely adjacent said interior wall; and lifting means disposed within said chamber for urging particulate material from a bottom of said chamber and axially upwardly from said bottom of said chamber.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a sectional view taken in elevation of a separating apparatus according to the present invention;
Figure 2 is an enlarged elevation view taken in section of a particle container and associated apparatus of the present invention;
Fig.3 is a view taken along line 3-3 of Fig. 2;
~ 3 ~ 7 . .
, Fig. 4 is a view taken along line 4-4 of Fig. l;
Fig. 5 is a view ~howing a feed tube support bearing structure for use with the present invention;
Fig. 6 is a view taken along line 6~6 of Fig. 5;
S and Fig. 7 is an enlarged view of the support detail of Fig. S.
. DESCRIPTION OF THE PREFERRE~D EM80DIMENT
Referring now to the several drawing figures in ~ which similar parts are identically numbered throughout, the '~ present invention and its operation will now be described.
Fig. 1 shows the present invention for use in a preferred embodiment for the separation of grain from fines and lesser weight grains. The separating apparatus is shown generally at 10 and is enclosed within a housing 12. It will be appreciated the present invention operates most effec-tively when in an enclosed space such as provided by housing 12. Such a location eliminates moving air which will inter-fere with the separation principles of the invention.
Best shown in Fig. 2, the apparatus 10 includes aparticle container 14 which is cylindrical in shape. The container 14 comprises a cylindrical container wall 16 having -~ one axially face closed by a bottom plate 18. A second axial face of the cylindrical container wall 16 includes a top ring 20 which leaves the majority of the second axial face unco-vered to define an opening 22 in communication with the con-tainer interior 24.
A drive shaft 26 is provided with its axis ver-tically disposed. Shaft 26 is rotatable about its axis.
Container 14 is connected to shaft 26 with an axis - of the container being coaxial with the axis of the shaft 26 and with container 14 being freely rotatable with shaft 26.
The container 14 is connected to shaft 26 by means oi a con-3S necting hub 28. Shaft 26 extends through hub 28 as shown in ~ 3 ~
the figures. The axial positioning of container 14 on shaft 26 may be adjusted through any suitable means (not shown).
The apparatus includes a feed tube 32 which is cylindrical and sized with an exterior diameter being approximately equal to an interior diameter Oe top ring 20.
Feed tube 32 extends surroundihg the upper portion of drive shaft 26 with tube 32 extending into the opening 22 of con-tainer 14. Accordingly, feed tube 32 is in partlculate flow communication with the interior 24 of container 14.
A f~ed tube support ring 33 is fixed to the outer surface of tube 32 and positioned to abut ring 20 when tube 32 extends into opening 22. Support ring 33 prevents inad-vertent downward movement of tube 32 into container 14.
Shown best in Figs. 5-7, an upper end 34 of shaft 26 is supported by feed tube 32. A shaft end bearing 36 includes a hollow rod 38 sized to rotatably receive shaft end 34 within an interior 40 of rod 38. An upper end 42 of rod 38 is closed and includes an axially extending bore 43 which may be closed by a grease fitting ~not shown). Lubricating grease may be injected through bore 43 into interior 40 to lubricate rotating shaft end 34.
A lower end 46 of rod 38 is surrounded by a sleeve 48. Preferably sleeve 48 is metal and includes a plurality of anchor nuts 50 secured to sleeve 46 through any suitable means such as welding. Support bolts 52 are thraadably received on nuts 50 and ex~end radially from sleeve 48 through feed tube 32 (Fig. 6). The bolts 52 are connected to feed tube 32 in any suitable manner to thereby retain the upper end 34 of drive shaft 26 in axial alignment with feed tube 32.
Shown best in Figs. 2 and 3, feed stabilizer 54 is disposed within the interior 24 of container 14. Stabilizer 54 includes a pair of parallel axially displaced support rings 56 and 58. Support rings S6 and 58 are maintained in spaced apart axial alignment by means o~ a plurality o 131~9 7 stabilizer blades 64.
Stabilizer blades 64 are secured to the support rings 56 and 58. In a preferred embodiment eight blades 64 - are provided although a greater or lesser number could be provided. Each of blades 64 are identical and comprise a resilient or cushion 66 connected to a rigid cushion support 68. The supports 68 are each connected to each of support rings 56 and 58.
As shown in the figures, blades 64 are elongated members and are secured to support rings 56 and S8 with a longitudinal axis of the blades 64 extending generally parallel to the axis of rotation of shaft 26. The blade cushions 66 project generally radially away from the axis of rotation and terminate at a cushion edge 70 which is opposing and closely spaced from an interior surface of cylinder 16.
The cushion 66 may be made of any non-abrasive material that will serve to prevent particulate matter from rotating within ~ the container 14 while preventing marring of the in~erior <~ surface of container 14.
A pair of support bars 60, 62 are provided having ; radially outer surfaces 60', 62' which oppose the inner sur-; face of feed tube 32. Surfaces 60', 62' are spaced apart approximate the diameter of tube 32. Surfaces 60', 62' are securely connected through any suitable means to tube 32.
25 Accordingly, bars 60, 62 permit stabilizer 54 to float without rotation within container 14.
A plurality of apertures 72 are fo~ned through , cylindrical container wall lh. Each of apert~res 72 includes a narrow portion 72a in direct comrnunication with container interior 24 and an enlarged counter sunk portion 72b opening through an exterior of container wall 16. Within each of apertures 72 an elongated barrel 74 is provided. The barrel 74 has an attachment end 76 which i9 beveled to be received within counter sunk portion 72b. The diameters of the barrel 74, and apertures 72 are selected such that an interior "
~3~8Y.7 ~
diameter of barrel 74 is equal to an interior diameter of aperture portions 72a with aperture portions 72a and barrel 76 being axiall~ aligned to provide a continuous smooth sur-face between barrel 74 and aperture portions 72a.
The actual number of barrels 74, their spacing and size will vary with material to be separated and with the diameter of tha particle chamber. Also, the positioning of the barrels is such that each barrel has a unique radial coordinate in relation to the central axis of rotation. The vertical distance between the rows of barrels 74 may differ from the horizontal spacing between barrels 74 in the same row as a result of achieving optimum positioning. However, once the positîoning has been determined, the vertical spacing of all rows of barrels 74 will ~e uniform and each barrel 74 in each row will be equidistant from the next. For example, container 14 may be provided with nine rows of barrels 74 each extending radially from container 16. In this case, each row would consist of forty barrels with adja-cent barrels in the same row being angularly dispLaced by nine degrees. Barrels in contiguous rows will be angularly offset to achieve unique positioning such that the plurality of barrels 74 will provide a maximum unencumbered distribu-tion of particulate material as will be described. Also, the length of barrels 7~ may vary with axial positioning on con-tainer 14. For example, the barrel length may decrease fromthe bottom of container 14 to the top to insure even distri-bution of material.
The separating apparatus 10 includes a compaction lifter component 80. Lifter component 80 includes a sleeve 82 secured to shaft 26 within the interior 24 of container 14. Sleeve 82 is connected to shat 26 for rotation therewith. A plurality of compaction lift plates 84 are con-nected to sleeve 82 for rotation therewith and extend radially away from sleeve 82. Each of lift plates 84 are connected to sleeve 82 and ~et at an angle A to a line of i 7 ~ 7 --travel ~arrow 3) of the lift plates 84 as they rotate with shaft 82. As shown in the figures, the lift plates 84 are disposed within interior 24 in a helical pattern surroundinq sleeve 82.
Referring to Figs. 1 and 4, a separating apparatus is schematically shown and includes the apparatus 10, feed tube 32 and shaft 26 are disposed within a housing 12. The housing eliminates moving air which would otherwise interfere with separation. Use of the apparatus without a housing should include other efforts to minimize wind. The housing includes a main floor 90 and a cylindrical wall 92;
Concentrically surrounding shaft 26 is a separating wall 94 extending upwardly from main floor 90. Spaced above main floor 90 and extending between opposing surfaces of separating wall 94 is a waste floor 96. A drive motor 98 is carried on main floor 90 beneath waste floor 96 and is operably connected to shaft 26 by means of gear reduction box 100 .
Waste floor 96 includes a discharge opening 102 which is elongated and extends generally radial to the axis of shaft 26. A sweeper blade 104 is provided for traveling about waste floor 96 and urging particulate matter towards floor discharge opening 102~ Disposed beneath floor discharge opening 102 is an auger 106 having a drive motor 25 108 for driving auger 106 to collect material from floor discharge opening 102 and dispose of the collected material through auger outlet 110. In an e~bodiment for grain separa-tion, auger 106 is preferred. For use with minerals, auger 106 may be replaced with any conveyor mechanism.
In operation of the apparatus, drive motor 98 through gear reduction box 100 drives shaft 26 to rotate about a vertical axis. Particulate feed material (such as grain to be separated) is admitted through feed tube 32 into the interior 24 of container 14. Container 14 is connected to shaft 26 and rotates therewith. Due to the rotation of ~3~ 9P~
container 14, particulate matter within the interior 24 is urged through the plurality of barrels 74 to be thrown radially away from the axis of shaft 26. I'he distance material travels will be a unction of a balance of the wei~ht of the material, air re~istance, the vertical height of container 14 and speed of rotation of container 14.
By adjusting the axial positioning of container 14 on shaft 26 and by selecting a desired rotational velocity of shaft 26, material separation is accomplished with wall 94 acting as a dividing w~ll between material of different weight. Material is collected on floor 96 and is swept by sweeper blade 104 through discharge opening 102. This material is collected by the auger 106 and discharged through auger discharge 110.
Due to support bars 60, 62 beiny connected to sta-tionary feed tube 32, the ~lurality of blades 64 are held stationary within rotating container 14. By preventing particulate matter from rotating with the container 14, the stabilizing action prevents material bridging over aperture portions 32, eliminates excessive stress on the walls of con-tainer 14 caused by the pressure of unwanted centrifugal m0vement of the particulate matter, and ensures maximum uni-form distribution of particulate material through each of the plurality of barrel 74. To prevent compaction, the rotating compaction sleeve 82 caus~s rotation of the compaction lift plates 84. The angular disposition of the compaction lift plates 84 on shaft 82 prevents compaction of feed material on bottom plate 18 and urges feed material to be uniformly distributed axially within the interior 24 of container 14.
Accordingly, the lift plates asRure axial uniformity. The blade mechanisms 64 prevent rotation of the feed material within interior 24 until the feed material is in the barrels 74 and assure that none of the barrels 74 are blocked by bridging of feed material.
The foregoing described apparatu~ can be used o~ a ~ 3 ~
variety of separation applications. For example, the appara-tus can be used to separate desired grains from waste fines.
The desired grain, being more massive than the fines, wi]l be projected furthest from the axis of rotation. Also, in the S spring, the feed material may be in the nature of various grains with the heaviest material being generally recognized as those grains which make more desirable seeds. It is further anticipated that the present invention could be use-ful in mineral separation such as for separating heavy minerals (such as gold and the like) from their lighter weight carrying ores. The apparatus has particular suitabil-ity for such mineral separation in that water is not necessary for the process.
From the foregoing detailed description of the pre-sent invention, it has been shown how the invention has been attained in a preferred manner. However, modifications and equivalence of the disclosed concepts such as readily occur to those skilled in the art are intended to be included in the scope of this invention. Thus, the scope of the invention is intended to be limited only by the scope of the claims as are, or may hereafter be, appended hereto.
I. Field of the Invention .
This invention relates to apparatus for separating particulate matter. More particularly, this invention per-tains to apparatus for centrifugally separating particulate matter.
II. Descri~tion of the Prior Ar~
~requently, it is desirable to separate particulate matter based on mass. One means of performing such separa-tion is through centrifugal separation. An example of such a separating apparatus is shown in U.S. patent 3,969,224 to Cerbo dated July 13, 1976.
Centrifugal separation of particulate matter will be desirable in numerous instances. For example, in mineral processing, valuable minerals frequently have a specific gra-vity greater than a specific gravity of the ore material with which the mineral is associated. By crushing the ore and mineral into generally uniform size, the ore and mineral may be separated through centrifugal separation. Centrifugal separation is particularly useful in such mineral processing since centrifugal separation can frequently be used as a dry process. This has particular advantages for uses in regions where water is scarce.
A very importan~ u~e of centrifugal processing would be in separating grains from waste material. In the Fall, centrifugal separators can be used to clean away the lighter fine material. In Spring, such separators can be used to separate the best kernels which are usually heavier than lesser grade kernels. The heavier kernels are a pre-ferred seed.
~L
q~
~ 3 ~ 7 It is an object of an aspect of the present invention to provide a centrifugal separator apparatus which can be used for a wide variety of particulate separation. It is an object of an aspect of ~he present invention to provide such an apparatus which ma~ be used with particulate material which is susceptible to caking. It is an object of an aspect; of the present invention to overcome problems encountered with prior art centrifugal separators. Namely, previous attempts to separate particulates using centrifugal force have been inefficient and impractical since the centrifugal force within the dispersion chamber results in the bridging of the particulate material across the apertures.
SUMMARY OF THE INVENTION
According to a preferred embodiment of the present invention, there is provided a particulate separating apparatus which includes a particle container having an interior wall which defines a particle receiving chamber. The container has an opening which exposes the chamber. The container is mounted to rotate about an axis generally coaxial with the axis of the chamber opening. A conduit is provided for admitting a flow of particulate matter into the chamber through the opening.
; A plurality of apertures are formed through the container in particulate flow communication with the chamber. The apertuxes extend generally radially from the axis of rotation. Separating apparatus includes stabilizing means disposed within the chamber for preventing the rotation of the particulate matter as the container rotates.
Other aspect of the invention are as follows:
A particle separating apparatus comprising:
a particle container having an interior wall defining a particle receiving chamber, said container having an opening exposing said chamber;
mounting means for mounting said container to rotate about an axis generally coaxial with an axis of said opening;
2a conduit means for admitting a flow of particulate matter into said chamber through said opening;
means fo.r defining a plurality of apertures extending generally radiallv through said wall with each of said apertures in particulate flow communication with said chamber; and stabilizing means for abating rotational movement of partlculate matter within said container as said container rotates, said stabilizing means including blocking walls extending generally transverse to a direction of rotation of said container, said container being movable relative to the blocking walls~
A particle separating apparatus comprising:
a particle container having an interior wall defining a particle receiving chamber, said container having an opening exposing said chamber;
mounting means for mounting said container to rotate about an axis generally coaxial with an axis of said opening;
~0 conduit means for admitting a flow of particulate matter into said chamber through said opening;
means for defining a plurality of apertures extending generally radially through said wall with each of said apertures in particulate flow communication with 5 said interior;
stabilizing means for abating rotational movement of particulate matter within said container as said container rotates; and lifting means rotatably disposed within said chamber to lift particulate material away from a bottom portion of said chamber and urge said material axially away from said bottom portion.
A particle separating apparatus comprising:
a container having cylindrical interior wall defining a chamber with an opening generally coaxial with a cylindrical axis of said interior wall;
~ 3 ~
2b a rotary shaft disposed for rotation about a generally vertical axis of rotation;
connecting means for connecting said container to said sha~t with said cylindrical axis being coaxial with said axis of rotation and with said opening disposed facing upwardly;
a stationary feed tube having a free end disposed to direct a flow of particulate matter from said tube into said chamber through said opening;
a plurality of apertures formed through said container and extending generally radial to said axis of rotation;
a plurality of stabilizer blades disposed within said chamber with said blades having longitudinal dimensions generally parallel to said axis of rotation, said blades having edges disposed closely adjacent said interior wall, said blades extending generally trans-verse to a direction of rotation of said container, said container being movable relative to said blades.
- A particle separating apparatus comprising:
a container having a cylindrical interior wall defining a chamber with an opening generally coaxial with a cylindrical axis of said interior wall;
a rotary shaft disposed for rotation about a generally vertical axis of rotation;
connecting means for connecting said container to said shaft with said cylindrical axis being coaxial with said axis of rotation and with said op~ning disposed facing upwardly;
a stationary feed tube having a free end disposed to direct a flow of particulate matter from said tube into said chamber through said opening;
a plurality of apertures formed through said container and extending generally radial to saicl axis of rotation;
a plurality of stabilizer blades disposed within said chamber with said blades having longitudinal dimensions generally parallel to said axis o~ rotation, r~.
~., J ~
~3~ 7 2c said blades having edges disposed closely adjacent said interior wall; and lifting means disposed within said chamber for urging particulate material from a bottom of said chamber and axially upwardly from said bottom of said chamber.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a sectional view taken in elevation of a separating apparatus according to the present invention;
Figure 2 is an enlarged elevation view taken in section of a particle container and associated apparatus of the present invention;
Fig.3 is a view taken along line 3-3 of Fig. 2;
~ 3 ~ 7 . .
, Fig. 4 is a view taken along line 4-4 of Fig. l;
Fig. 5 is a view ~howing a feed tube support bearing structure for use with the present invention;
Fig. 6 is a view taken along line 6~6 of Fig. 5;
S and Fig. 7 is an enlarged view of the support detail of Fig. S.
. DESCRIPTION OF THE PREFERRE~D EM80DIMENT
Referring now to the several drawing figures in ~ which similar parts are identically numbered throughout, the '~ present invention and its operation will now be described.
Fig. 1 shows the present invention for use in a preferred embodiment for the separation of grain from fines and lesser weight grains. The separating apparatus is shown generally at 10 and is enclosed within a housing 12. It will be appreciated the present invention operates most effec-tively when in an enclosed space such as provided by housing 12. Such a location eliminates moving air which will inter-fere with the separation principles of the invention.
Best shown in Fig. 2, the apparatus 10 includes aparticle container 14 which is cylindrical in shape. The container 14 comprises a cylindrical container wall 16 having -~ one axially face closed by a bottom plate 18. A second axial face of the cylindrical container wall 16 includes a top ring 20 which leaves the majority of the second axial face unco-vered to define an opening 22 in communication with the con-tainer interior 24.
A drive shaft 26 is provided with its axis ver-tically disposed. Shaft 26 is rotatable about its axis.
Container 14 is connected to shaft 26 with an axis - of the container being coaxial with the axis of the shaft 26 and with container 14 being freely rotatable with shaft 26.
The container 14 is connected to shaft 26 by means oi a con-3S necting hub 28. Shaft 26 extends through hub 28 as shown in ~ 3 ~
the figures. The axial positioning of container 14 on shaft 26 may be adjusted through any suitable means (not shown).
The apparatus includes a feed tube 32 which is cylindrical and sized with an exterior diameter being approximately equal to an interior diameter Oe top ring 20.
Feed tube 32 extends surroundihg the upper portion of drive shaft 26 with tube 32 extending into the opening 22 of con-tainer 14. Accordingly, feed tube 32 is in partlculate flow communication with the interior 24 of container 14.
A f~ed tube support ring 33 is fixed to the outer surface of tube 32 and positioned to abut ring 20 when tube 32 extends into opening 22. Support ring 33 prevents inad-vertent downward movement of tube 32 into container 14.
Shown best in Figs. 5-7, an upper end 34 of shaft 26 is supported by feed tube 32. A shaft end bearing 36 includes a hollow rod 38 sized to rotatably receive shaft end 34 within an interior 40 of rod 38. An upper end 42 of rod 38 is closed and includes an axially extending bore 43 which may be closed by a grease fitting ~not shown). Lubricating grease may be injected through bore 43 into interior 40 to lubricate rotating shaft end 34.
A lower end 46 of rod 38 is surrounded by a sleeve 48. Preferably sleeve 48 is metal and includes a plurality of anchor nuts 50 secured to sleeve 46 through any suitable means such as welding. Support bolts 52 are thraadably received on nuts 50 and ex~end radially from sleeve 48 through feed tube 32 (Fig. 6). The bolts 52 are connected to feed tube 32 in any suitable manner to thereby retain the upper end 34 of drive shaft 26 in axial alignment with feed tube 32.
Shown best in Figs. 2 and 3, feed stabilizer 54 is disposed within the interior 24 of container 14. Stabilizer 54 includes a pair of parallel axially displaced support rings 56 and 58. Support rings S6 and 58 are maintained in spaced apart axial alignment by means o~ a plurality o 131~9 7 stabilizer blades 64.
Stabilizer blades 64 are secured to the support rings 56 and 58. In a preferred embodiment eight blades 64 - are provided although a greater or lesser number could be provided. Each of blades 64 are identical and comprise a resilient or cushion 66 connected to a rigid cushion support 68. The supports 68 are each connected to each of support rings 56 and 58.
As shown in the figures, blades 64 are elongated members and are secured to support rings 56 and S8 with a longitudinal axis of the blades 64 extending generally parallel to the axis of rotation of shaft 26. The blade cushions 66 project generally radially away from the axis of rotation and terminate at a cushion edge 70 which is opposing and closely spaced from an interior surface of cylinder 16.
The cushion 66 may be made of any non-abrasive material that will serve to prevent particulate matter from rotating within ~ the container 14 while preventing marring of the in~erior <~ surface of container 14.
A pair of support bars 60, 62 are provided having ; radially outer surfaces 60', 62' which oppose the inner sur-; face of feed tube 32. Surfaces 60', 62' are spaced apart approximate the diameter of tube 32. Surfaces 60', 62' are securely connected through any suitable means to tube 32.
25 Accordingly, bars 60, 62 permit stabilizer 54 to float without rotation within container 14.
A plurality of apertures 72 are fo~ned through , cylindrical container wall lh. Each of apert~res 72 includes a narrow portion 72a in direct comrnunication with container interior 24 and an enlarged counter sunk portion 72b opening through an exterior of container wall 16. Within each of apertures 72 an elongated barrel 74 is provided. The barrel 74 has an attachment end 76 which i9 beveled to be received within counter sunk portion 72b. The diameters of the barrel 74, and apertures 72 are selected such that an interior "
~3~8Y.7 ~
diameter of barrel 74 is equal to an interior diameter of aperture portions 72a with aperture portions 72a and barrel 76 being axiall~ aligned to provide a continuous smooth sur-face between barrel 74 and aperture portions 72a.
The actual number of barrels 74, their spacing and size will vary with material to be separated and with the diameter of tha particle chamber. Also, the positioning of the barrels is such that each barrel has a unique radial coordinate in relation to the central axis of rotation. The vertical distance between the rows of barrels 74 may differ from the horizontal spacing between barrels 74 in the same row as a result of achieving optimum positioning. However, once the positîoning has been determined, the vertical spacing of all rows of barrels 74 will ~e uniform and each barrel 74 in each row will be equidistant from the next. For example, container 14 may be provided with nine rows of barrels 74 each extending radially from container 16. In this case, each row would consist of forty barrels with adja-cent barrels in the same row being angularly dispLaced by nine degrees. Barrels in contiguous rows will be angularly offset to achieve unique positioning such that the plurality of barrels 74 will provide a maximum unencumbered distribu-tion of particulate material as will be described. Also, the length of barrels 7~ may vary with axial positioning on con-tainer 14. For example, the barrel length may decrease fromthe bottom of container 14 to the top to insure even distri-bution of material.
The separating apparatus 10 includes a compaction lifter component 80. Lifter component 80 includes a sleeve 82 secured to shaft 26 within the interior 24 of container 14. Sleeve 82 is connected to shat 26 for rotation therewith. A plurality of compaction lift plates 84 are con-nected to sleeve 82 for rotation therewith and extend radially away from sleeve 82. Each of lift plates 84 are connected to sleeve 82 and ~et at an angle A to a line of i 7 ~ 7 --travel ~arrow 3) of the lift plates 84 as they rotate with shaft 82. As shown in the figures, the lift plates 84 are disposed within interior 24 in a helical pattern surroundinq sleeve 82.
Referring to Figs. 1 and 4, a separating apparatus is schematically shown and includes the apparatus 10, feed tube 32 and shaft 26 are disposed within a housing 12. The housing eliminates moving air which would otherwise interfere with separation. Use of the apparatus without a housing should include other efforts to minimize wind. The housing includes a main floor 90 and a cylindrical wall 92;
Concentrically surrounding shaft 26 is a separating wall 94 extending upwardly from main floor 90. Spaced above main floor 90 and extending between opposing surfaces of separating wall 94 is a waste floor 96. A drive motor 98 is carried on main floor 90 beneath waste floor 96 and is operably connected to shaft 26 by means of gear reduction box 100 .
Waste floor 96 includes a discharge opening 102 which is elongated and extends generally radial to the axis of shaft 26. A sweeper blade 104 is provided for traveling about waste floor 96 and urging particulate matter towards floor discharge opening 102~ Disposed beneath floor discharge opening 102 is an auger 106 having a drive motor 25 108 for driving auger 106 to collect material from floor discharge opening 102 and dispose of the collected material through auger outlet 110. In an e~bodiment for grain separa-tion, auger 106 is preferred. For use with minerals, auger 106 may be replaced with any conveyor mechanism.
In operation of the apparatus, drive motor 98 through gear reduction box 100 drives shaft 26 to rotate about a vertical axis. Particulate feed material (such as grain to be separated) is admitted through feed tube 32 into the interior 24 of container 14. Container 14 is connected to shaft 26 and rotates therewith. Due to the rotation of ~3~ 9P~
container 14, particulate matter within the interior 24 is urged through the plurality of barrels 74 to be thrown radially away from the axis of shaft 26. I'he distance material travels will be a unction of a balance of the wei~ht of the material, air re~istance, the vertical height of container 14 and speed of rotation of container 14.
By adjusting the axial positioning of container 14 on shaft 26 and by selecting a desired rotational velocity of shaft 26, material separation is accomplished with wall 94 acting as a dividing w~ll between material of different weight. Material is collected on floor 96 and is swept by sweeper blade 104 through discharge opening 102. This material is collected by the auger 106 and discharged through auger discharge 110.
Due to support bars 60, 62 beiny connected to sta-tionary feed tube 32, the ~lurality of blades 64 are held stationary within rotating container 14. By preventing particulate matter from rotating with the container 14, the stabilizing action prevents material bridging over aperture portions 32, eliminates excessive stress on the walls of con-tainer 14 caused by the pressure of unwanted centrifugal m0vement of the particulate matter, and ensures maximum uni-form distribution of particulate material through each of the plurality of barrel 74. To prevent compaction, the rotating compaction sleeve 82 caus~s rotation of the compaction lift plates 84. The angular disposition of the compaction lift plates 84 on shaft 82 prevents compaction of feed material on bottom plate 18 and urges feed material to be uniformly distributed axially within the interior 24 of container 14.
Accordingly, the lift plates asRure axial uniformity. The blade mechanisms 64 prevent rotation of the feed material within interior 24 until the feed material is in the barrels 74 and assure that none of the barrels 74 are blocked by bridging of feed material.
The foregoing described apparatu~ can be used o~ a ~ 3 ~
variety of separation applications. For example, the appara-tus can be used to separate desired grains from waste fines.
The desired grain, being more massive than the fines, wi]l be projected furthest from the axis of rotation. Also, in the S spring, the feed material may be in the nature of various grains with the heaviest material being generally recognized as those grains which make more desirable seeds. It is further anticipated that the present invention could be use-ful in mineral separation such as for separating heavy minerals (such as gold and the like) from their lighter weight carrying ores. The apparatus has particular suitabil-ity for such mineral separation in that water is not necessary for the process.
From the foregoing detailed description of the pre-sent invention, it has been shown how the invention has been attained in a preferred manner. However, modifications and equivalence of the disclosed concepts such as readily occur to those skilled in the art are intended to be included in the scope of this invention. Thus, the scope of the invention is intended to be limited only by the scope of the claims as are, or may hereafter be, appended hereto.
Claims (11)
1. A particle separating apparatus comprising:
a particle container having an interior wall defining a particle receiving chamber, said container having an opening exposing said chamber;
mounting means for mounting said container to rotate about an axis generally coaxial with an axis of said opening;
conduit means for admitting a flow of particulate matter into said chamber through said opening;
means for defining a plurality of apertures extending generally radially through said wall with each of said apertures in particulate flow communication with said chamber; and stabilizing means for abating rotational movement of particulate matter within said container as said container rotates, said stabilizing means including blocking walls extending generally transverse to a direction of rotation of said container, said container being movable relative to the blocking walls.
a particle container having an interior wall defining a particle receiving chamber, said container having an opening exposing said chamber;
mounting means for mounting said container to rotate about an axis generally coaxial with an axis of said opening;
conduit means for admitting a flow of particulate matter into said chamber through said opening;
means for defining a plurality of apertures extending generally radially through said wall with each of said apertures in particulate flow communication with said chamber; and stabilizing means for abating rotational movement of particulate matter within said container as said container rotates, said stabilizing means including blocking walls extending generally transverse to a direction of rotation of said container, said container being movable relative to the blocking walls.
2. An apparatus according to Claim 1 wherein said blocking walls include a plurality of stabilizer walls with means for supporting said walls within said chamber with said blades opposing and closely spaced from said interior wall.
3. An apparatus according to Claim 2 wherein said walls have a longitudinal dimension extending generally parallel to said axis of rotation.
4. An apparatus according to Claim 1 wherein said stabilizing means comprise a plurality of resilient walls disposed with longitudinal axes parallel to said axis of rotation and with said walls closely spaced from said interior wall.
5. A particle separating apparatus comprising:
a particle container having an interior wall defining a particle receiving chamber, said container having an opening exposing said chamber;
mounting means for mounting said container to rotate about an axis generally coaxial with an axis of said opening;
conduit means for admitting a flow of particulate matter into said chamber through said opening;
means for defining a plurality of apertures extending generally radially through said wall with each of said apertures in particulate flow communication with said interior;
stabilizing means for abating rotational movement of particulate matter within said container as said container rotates; and lifting means rotatably disposed within said chamber to lift particulate material away from a bottom portion of said chamber and urge said material axially away from said bottom portion.
a particle container having an interior wall defining a particle receiving chamber, said container having an opening exposing said chamber;
mounting means for mounting said container to rotate about an axis generally coaxial with an axis of said opening;
conduit means for admitting a flow of particulate matter into said chamber through said opening;
means for defining a plurality of apertures extending generally radially through said wall with each of said apertures in particulate flow communication with said interior;
stabilizing means for abating rotational movement of particulate matter within said container as said container rotates; and lifting means rotatably disposed within said chamber to lift particulate material away from a bottom portion of said chamber and urge said material axially away from said bottom portion.
6. An apparatus according to Claim 5 wherein said lifting means includes a plurality of spaced apart lifting plates radially extending from a shaft disposed within said chamber.
7. An apparatus according to Claim 1 wherein said separator is disposed within a housing having a floor with a dividing wall separating said floor into an outer circumferential portion and an inner concentric circumferential portion, a discharge opening formed through said floor in said inner circumferential portion and a moving blade disposed to urge particulate material within said inner portion toward said opening in said floor.
8. A particle separating apparatus comprising:
a container having cylindrical interior wall defining a chamber with an opening generally coaxial with a cylindrical axis of said interior wall;
a rotary shaft disposed for rotation about a generally vertical axis of rotation;
connecting means for connecting said container to said shaft with said cylindrical axis being coaxial with said axis of rotation and with said opening disposed facing upwardly;
a stationary feed tube having a free end disposed to direct a flow of particulate matter from said tube into said chamber through said opening;
a plurality of apertures formed through said container and extending generally radial to said axis of rotation;
a plurality of stabilizer blades disposed within said chamber with said blades having longitudinal dimensions generally parallel to said axis of rotation, said blades having edges disposed closely adjacent said interior wall, said blades extending generally transverse to a direction of rotation of said container, said container being movable relative to said blades.
a container having cylindrical interior wall defining a chamber with an opening generally coaxial with a cylindrical axis of said interior wall;
a rotary shaft disposed for rotation about a generally vertical axis of rotation;
connecting means for connecting said container to said shaft with said cylindrical axis being coaxial with said axis of rotation and with said opening disposed facing upwardly;
a stationary feed tube having a free end disposed to direct a flow of particulate matter from said tube into said chamber through said opening;
a plurality of apertures formed through said container and extending generally radial to said axis of rotation;
a plurality of stabilizer blades disposed within said chamber with said blades having longitudinal dimensions generally parallel to said axis of rotation, said blades having edges disposed closely adjacent said interior wall, said blades extending generally transverse to a direction of rotation of said container, said container being movable relative to said blades.
9. An apparatus according to Claim 8 wherein said blades include a plurality of brushes disposed within said chamber having longitudinal dimensions extending generally parallel to said axis of rotation with brushes projecting radially toward said interior wall.
10. A particle separating apparatus comprising:
a container having a cylindrical interior wall defining a chamber with an opening generally coaxial with a cylindrical axis of said interior wall;
a rotary shaft disposed for rotation about a generally vertical axis of rotation;
connecting means for connecting said container to said shaft with said cylindrical axis being coaxial with said axis of rotation and with said opening disposed facing upwardly;
a stationary feed tube having a free end disposed to direct a flow of particulate matter from said tube into said chamber through said opening;
a plurality of apertures formed through said container and extending generally radial to said axis of rotation;
a plurality of stabilizer blades disposed within said chamber with said blades having longitudinal dimensions generally parallel to said axis of rotation, said blades having edges disposed closely adjacent said interior wall; and lifting means disposed within said chamber for urging particulate material from a bottom of said chamber and axially upwardly from said bottom of said chamber.
a container having a cylindrical interior wall defining a chamber with an opening generally coaxial with a cylindrical axis of said interior wall;
a rotary shaft disposed for rotation about a generally vertical axis of rotation;
connecting means for connecting said container to said shaft with said cylindrical axis being coaxial with said axis of rotation and with said opening disposed facing upwardly;
a stationary feed tube having a free end disposed to direct a flow of particulate matter from said tube into said chamber through said opening;
a plurality of apertures formed through said container and extending generally radial to said axis of rotation;
a plurality of stabilizer blades disposed within said chamber with said blades having longitudinal dimensions generally parallel to said axis of rotation, said blades having edges disposed closely adjacent said interior wall; and lifting means disposed within said chamber for urging particulate material from a bottom of said chamber and axially upwardly from said bottom of said chamber.
11. An apparatus according to Claim 10 wherein said lifting means comprises a rotary shaft disposed within said chamber to rotate coaxially with said axis of rotation, said shaft carrying a plurality of lifting members extending radially from said shaft and disposed in a helical format axially along a length of said shaft.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/084,409 US4779740A (en) | 1987-08-10 | 1987-08-10 | Particle separating apparatus |
| US84,409 | 1987-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1318897C true CA1318897C (en) | 1993-06-08 |
Family
ID=22184785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000573178A Expired - Lifetime CA1318897C (en) | 1987-08-10 | 1988-07-27 | Particle separating apparatus |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4779740A (en) |
| AU (1) | AU596776B2 (en) |
| CA (1) | CA1318897C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110508492B (en) * | 2019-08-30 | 2024-05-14 | 东北大学 | Disc concentrator |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US466730A (en) * | 1892-01-05 | Lines | ||
| US478828A (en) * | 1892-07-12 | Olof sundgren | ||
| US80764A (en) * | 1868-08-04 | Stephen t | ||
| US87360A (en) * | 1869-03-02 | Improved centriftyg-al ore-separator | ||
| US653792A (en) * | 1897-12-22 | 1900-07-17 | Arthur Dasconaguerre | Centrifugal ore-separator. |
| US728475A (en) * | 1902-03-08 | 1903-05-19 | Charles H Lane | Air-separator. |
| US833704A (en) * | 1904-03-26 | 1906-10-16 | Hiram W Blaisdell | Distributer. |
| US895489A (en) * | 1907-03-18 | 1908-08-11 | Orville M Morse | Feed-regulator. |
| US942251A (en) * | 1908-10-03 | 1909-12-07 | Coal And Coke By Products Company | Centrifugal dry coal-separator. |
| US976350A (en) * | 1909-08-18 | 1910-11-22 | William J Ehrsam | Throwing-wheel for graders. |
| US1358375A (en) * | 1919-03-24 | 1920-11-09 | Koch Fritz | Apparatus for separating particles of varying size or density |
| US1461777A (en) * | 1921-07-27 | 1923-07-17 | Koch Fritz | Centrifugal separating machine |
| GB757994A (en) * | 1953-04-01 | 1956-09-26 | Albert Brice | Improved apparatus for sorting weeds, stones and the like from potatoes or other crops or vegetables |
| CH482471A (en) * | 1963-12-20 | 1969-12-15 | Rumpf Hans Prof Ing Dr | Method and device for sifting granular material in the cross flow for separation limits below 1 mm |
| US3620390A (en) * | 1969-12-08 | 1971-11-16 | Specialized Products Inc | Apparatus for spreading particulate material |
| US3969224A (en) * | 1974-05-22 | 1976-07-13 | Potters Industries Inc. | Method and apparatus for separating particulate material |
| US4437613A (en) * | 1982-03-10 | 1984-03-20 | Olson Floyd V | Particle spreader apparatus |
-
1987
- 1987-08-10 US US07/084,409 patent/US4779740A/en not_active Expired - Fee Related
-
1988
- 1988-07-27 CA CA000573178A patent/CA1318897C/en not_active Expired - Lifetime
- 1988-07-28 AU AU20133/88A patent/AU596776B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| AU2013388A (en) | 1989-02-16 |
| AU596776B2 (en) | 1990-05-10 |
| US4779740A (en) | 1988-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4601236B2 (en) | Grain sorting system | |
| US4528091A (en) | Particle classifier | |
| US5158182A (en) | Sifter | |
| US4756428A (en) | Method and turbo-separator for dispersion air separation, particularly of cement | |
| CN1103335A (en) | Screening machine | |
| US4915826A (en) | Grain cleaner | |
| US4981219A (en) | Apparatus and method for separating intermixed particles of differing densities | |
| US3960714A (en) | Centrifugal separator with rotary distributor | |
| US2946440A (en) | Gyratory sifting machine | |
| US4276157A (en) | Combination feeder and sifter | |
| US5366639A (en) | Process of separating using a rotating screen | |
| US5375720A (en) | Dry separation of particulate material of different densities | |
| US3123551A (en) | Method and apparatus for separating | |
| US11192117B2 (en) | Mill | |
| CA1318897C (en) | Particle separating apparatus | |
| EP0215045B1 (en) | Mill for grinding granular material | |
| CN107470121A (en) | A kind of screening technique of granule materials | |
| US4055487A (en) | Drum-type sand classifier | |
| US4107034A (en) | Air screw classifier | |
| US2466309A (en) | Horizontal rotating sifter | |
| GB2217691A (en) | Feeding granular or powdered material | |
| US2094438A (en) | Sifter system | |
| US3047147A (en) | Installation for the continuous separation of objects according to specific gravity | |
| US3799343A (en) | Centrifuge and method | |
| US1898249A (en) | Grain or fine particle grader |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |
Effective date: 20100608 |