US3672500A - Apparatus for grading particles according to their sphericity - Google Patents
Apparatus for grading particles according to their sphericityDownload PDFInfo
- Publication number
- US3672500A US3672500AUS65963AUS3672500DAUS3672500AUS 3672500 AUS3672500 AUS 3672500AUS 65963 AUS65963 AUS 65963AUS 3672500D AUS3672500D AUS 3672500DAUS 3672500 AUS3672500 AUS 3672500A
- Authority
- US
- United States
- Prior art keywords
- particles
- sphericity
- periphery
- grading
- collecting
- 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
Images
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
- B07B13/10—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects
- B07B13/11—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices using momentum effects involving travel of particles over surfaces which separate by centrifugal force or by relative friction between particles and such surfaces, e.g. helical sorters
- 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
- B07B13/14—Details or accessories
- B07B13/16—Feed or discharge arrangements
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S209/00—Classifying, separating, and assorting solids
- Y10S209/91—Feed hopper
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S209/00—Classifying, separating, and assorting solids
- Y10S209/931—Materials of construction
Definitions
- ABSTRACT Particlessuch as nuclear fuel particles, are graded according Aug' [969 Great Bmam "42'23u69 to their sphericity by feeding them at a controlled rate to the 152] U.S. Cl ..209/ll6 central region ofa rotating table and collecting them in a [5
- a double 581 Field of Search 2091116117, us hopper Systemis Provided the lower one of which may be vibrated, so that particles can be fed by gravity one after the other to the table.
- particles to be gradedare fed to the upper region of a moving endless belt inclined to the horizontal plane, adjacent a fixed guide member which imparts a parabolic motion to the particles in contact with the belt surface.
- the paths of the particles across the beltare such that according to the sphericity they terminate at different positions along the lower edge of the belt.
- apparatus for the grading of particles according to their sphericitycomprises a substantially horizontally disposed rotatable table mounted on a drive shaft coupled to drive means for rotating the table in one direction at a constant speed, feed means for feeding particles at a controlled rate to the center region of the upper surface of the table, fixed guide means extending obliquely with respect to the periphery of the table and contacting the upper surface of the table to guide particles off the surface of the table if such particles have not moved to the periphery of the table during one revolution thereof, collection means being provided around the periphery of the table for collecting particles dropping over the edge of the table, the feed means preferably comprising two hoppers one above the other, the upper one having an outlet dipping into the lower one and the lower one having a restricted opening discharging to the table.
- the guide meansare of flexible material where they contact the table and are capable of adjustment of their position and angle in relation to the upper surface of the table.
- the guide meanspreferably is in two parts, a shorter part being located radially inwardly of the feed means and a longer part being located radially outwardly of the feed means so that particles deflected by the short part are caused to take up paths such that they are guided from the table by the long part.
- FIG. Iis a plan view of the apparatus
- FIG. 2is a sectional view along the line lI-II of FIG. I.
- FIG. 3is a sectional view of a detail of FIG. 1.
- a horizontally disposed rotatable disc shaped table 1has means for rotating it in the direction indicated by the arrow A.
- the table 1has located above it and adjacent to its center a small hopper 2 which acts as the receptacle from which nuclear fuel particles to be graded according to their sphericity are fed to the table I.
- the rate of feed of the nuclear fuel particles from the hopper 2 on to the table 1is controlled by the internal diameter of a feed chute 3 at the base ofthe hopper2 allowing the particles to be graded to pass along it one alter the other, and by the amplitude of the vibra tion applied to the hopper from a 50 Hz vibrator 4 via a vibrator arm 5.
- the hopper 2has a flexible mounting 6 acting as a fulcrum. Nuclear fuel particles are fed to the hopper 2 from a main hopper 7 located above it, having an outlet 8 extending into the hopper 2. Particles only flow from the main hopper 7 to the hopper 2 when the level in the hopper 2 falls below the bottom of the outlet 8.
- the arrangement of the hoppers 2 and 7ensures that the level of nuclear fuel particles in the hopper 2 automatically remains constant and is independent of the level of the nuclear fuel particles in the main hopper 7.
- FIG. 3shows the support arrangement for each of the baffles 9 and 10, comprising a support shaft 11 and lower extremity of which is attached to a clamping member 12 extending the length of the baffle, in which flexible material 13 forming the baflle is located.
- the lower edge of the flexible materialcontacts the surface of the table 1 and leads into the direction of rotation of the table 1, indicated by the arrow A.
- Adjustment of the support shafts I1enables the position and angle of the bafiles 9 and 10 to be adjusted in relation to the upper surface of the table I.
- the table 1is mounted on a drive shaft 14 which is coupled to a variable speed drive motor 15.
- a collecting tray I6Surrounding the periphery of the table I is a collecting tray I6 which is subdivided into sections 17 by vertical plates 18.
- Each of the sections I7has a sloping bottom (sloping in the direction of the arrow B) leading into a collecting chute 19, which leads into a collecting vessel 20.
- nuclear fuel particles to be graded according to their sphericityare fed into the main hopper 7 and from there pass into the small hopper 2 which is vibrated by the 50 Hz vibrator 4 via the vibrator arm 5. Particles are thus fed one after the other from the hopper 2 along the feed chute 3 and are discharged on to the upper surface of the table 1. The particles are then carried round on the table 1 and at the same time roll outwards towards the edge of the table 1 as a result of centrifugal force, the rate of movement of the particles over the upper surface of the table 1 depending on the frictional forces acting between each particle and the surface of the table 1. These frictional forces are a function of the sphericity of the particle and of any surface faults, irregularities or flats which are present.
- each particlemoves towards the edge of the table 1 it is also accelerated circumferentially as a result of its continuously increasing radius of travel over the surface of the table 1.
- Each particleis therefore rolling under the influence of two continuously increasing forces acting at right angles and thus the majority of the surface of each particle contacts the table 1 at some time during its travel from the center to the outer edge of the table 1.
- those particles having good sphericitymove rapidly to the edge of the table 1 following paths such as the dotted line C, in FIG. 1 whilst those particles having poorer sphericity and surface faults are carried further around the table 1 following paths such as the dotted lines C, and C, of FIG. 1.
- Particles of yet poorer sphericityare carried even further around the table 1 following paths such as the dotted lines C and C, of FIG. l before ejection from the edge of the table I.
- Particles with very poor shapewill follow paths such as the dotted line C, in FIG. I or with broken particles and other debris will not move over the edge of the table 1 but will follow paths such as the dotted lines C and C in FIG. 1.
- the deflector baffle 9ensures that particles following the inner paths such as shown by the dotted line C are deflected outwards so that they take a path to meet the deflector baffle 10 and do not accumulate in the center of the table 1 where they could block the discharge of fresh particles from the feed chute 3.
- the particles following paths such as shown by the dotted lines C and Q in FIG. Iare diverted to the edge of the table 1 by the baflle l0 and are ejected from the edge of the table 1.
- the particles ejected from the edge of the table 1fall into one of the sections 17 of the collecting tray 16, according to their degree of sphericity and will pass into the associated collection chute l9 and from there into the associated collection vessel 20.
- the rotating table 1may be of Perspex (RTM) Bakelite" (RTM) or metal.
- RTMPerspex
- RTMBakelite
- metalIn the case of tables of non conducting material such as Perspex or Bakelite the upper surface is rendered electrically conducting by the application of a film of a metallic nature or colloidal graphite. This is done in order to avoid the buildup of static charges on the surface of the table which can interfere with the free movement of the parti cles.
- the speed of rotation of the table 1may be in the range -50 revolutions per minute whilst table diameters within the range of l2-25 inches may be used, the larger diameter tables enabling a higher particle feed rate to be employed. Satisfactory baffles 9 and 10 are fabricated from 50 mm polyethylene sheet.
- the apparatus described aboveis capable of accommodating a wide variety of particulate materials and sizes by varying the rate of rotation of the table 1, by adjusting the variable speed drive motor 15.
- the position and angle of the baffles 9 and I0 and of the hopper system (2 and 7)can be adjusted to alter the selectivity of the method.
- Apparatus for the grading of particles according to their sphericitycomprising a substantially horizontally disposed rotatable table mounted on a drive shaft coupled to drive means for rotating said table in one direction at a constant speed, feed means for feeding particles at a controlled rate to the center region of the upper surface of the table, fixed guide means extending obliquely with respect to the periphery of the table and contacting the upper surface of the table to guide particles off the surface of the table if such particles have not moved to the periphery of the table during one revolution of the table, collection means being provided around the periphery of the table for collecting particles dropping over the edge of the table, said feed means comprising two hoppers one above the other, the upper one having an outlet dipping into the lower one and the lower one having a restricted opening discharging to the table.
- Apparatus according to claim 1in which said collecting means has a plurality of sections for collecting particles leav ing the table over a corresponding plurality of arcs of the periphery of the table.
Landscapes
- Feeding Of Articles To Conveyors (AREA)
- Chutes (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
Description
United States Patent Hayes 1 June 27, 1972 i 1 APPARATUS FOR GRADING [56] Relerences Cited PARTICLES ACCORDING TO THEIR UNlTED STATES PATENTS SPHERICITY 1,058,259 4/l913 Pratt H.209 i7 [72] Inventor: Michael Richard HIYCS, Kirkham, England 3 4 55 0 Deinken e 7 [73] Assignee: United Kingdom Atomic Energy Authority, 11030-042 6/1912 wilmoi e! --209/1 17 London, England 468,066 2/1892 Wheelan .,......209/1 16 [22] Filed: 1970 Primary Examiner-Allen N. Knowles [2i App]. No: 65,963 Attorney-Larson, Taylor and Hinds [30] Foreign Application Priority Data [57] ABSTRACT Particles, such as nuclear fuel particles, are graded according Aug' [969 Great Bmam "42'23u69 to their sphericity by feeding them at a controlled rate to the 152] U.S. Cl ..209/ll6 central region ofa rotating table and collecting them in a [5| 1 C| v v I I I v I u "307', 13/10 lector as they drop over the edge of the table. A double 581 Field of Search 2091116117, us hopper System is Provided the lower one of which may be vibrated, so that particles can be fed by gravity one after the other to the table.
6 Claims, 3 Drawing Figures APPARATUS FOR GRADING PARTICLES ACCORDING TO THEIR SPHERICITY BACKGROUND OF THE INVENTION This invention relates to grading particles, produced by spheroidizing processes, according to their sphericity.
Known methods for doing this have used an inclined endless belt, particles to be graded being fed on to the upper end of the belt which is driven in a direction so that non-spherical particles are carried upwards whilst spherical particles roll downward against the direction of movement of the belt.
In another proposal particles to be graded are fed to the upper region of a moving endless belt inclined to the horizontal plane, adjacent a fixed guide member which imparts a parabolic motion to the particles in contact with the belt surface. The paths of the particles across the belt are such that according to the sphericity they terminate at different positions along the lower edge of the belt.
The methods described above are of limited sensitivity in the discrimination between spherical and non-spherical particles and in addition are not always adequate to meet the requirements of industrial processes such as the manufacture of coated nuclear fuel particles where it is necessary to remove broken and mis-shapen spheres and other debris, before and after the application of coating layers.
SUMMARY OF THE INVENTION It is an object of this invention to provide an improved apparatus having a higher degree of sensitivity in the discrimination between spherical and non-spherical particles.
According to the invention, apparatus for the grading of particles according to their sphericity comprises a substantially horizontally disposed rotatable table mounted on a drive shaft coupled to drive means for rotating the table in one direction at a constant speed, feed means for feeding particles at a controlled rate to the center region of the upper surface of the table, fixed guide means extending obliquely with respect to the periphery of the table and contacting the upper surface of the table to guide particles off the surface of the table if such particles have not moved to the periphery of the table during one revolution thereof, collection means being provided around the periphery of the table for collecting particles dropping over the edge of the table, the feed means preferably comprising two hoppers one above the other, the upper one having an outlet dipping into the lower one and the lower one having a restricted opening discharging to the table. Preferably the guide means are of flexible material where they contact the table and are capable of adjustment of their position and angle in relation to the upper surface of the table. The guide means preferably is in two parts, a shorter part being located radially inwardly of the feed means and a longer part being located radially outwardly of the feed means so that particles deflected by the short part are caused to take up paths such that they are guided from the table by the long part.
DESCRIPTION OF THE DRAWINGS An apparatus in accordance with the invention and the method of operation will now be described by way of example, with reference to the accompanying drawings wherein:
FIG. I is a plan view of the apparatus,
FIG. 2 is a sectional view along the line lI-II of FIG. I, and
FIG. 3 is a sectional view of a detail of FIG. 1.
DESCRIPTION OF THE PREFERRED EMBODIMENT In the drawings a horizontally disposed rotatable disc shaped table 1, has means for rotating it in the direction indicated by the arrow A. The table 1 has located above it and adjacent to its center asmall hopper 2 which acts as the receptacle from which nuclear fuel particles to be graded according to their sphericity are fed to the table I. The rate of feed of the nuclear fuel particles from thehopper 2 on to the table 1 is controlled by the internal diameter of a feed chute 3 at the base ofthe hopper2 allowing the particles to be graded to pass along it one alter the other, and by the amplitude of the vibra tion applied to the hopper from a 50 Hz vibrator 4 via a vibrator arm 5. Thehopper 2 has a flexible mounting 6 acting as a fulcrum. Nuclear fuel particles are fed to thehopper 2 from a main hopper 7 located above it, having anoutlet 8 extending into thehopper 2. Particles only flow from the main hopper 7 to thehopper 2 when the level in thehopper 2 falls below the bottom of theoutlet 8. The arrangement of thehoppers 2 and 7 ensures that the level of nuclear fuel particles in thehopper 2 automatically remains constant and is independent of the level of the nuclear fuel particles in the main hopper 7.
Located immediately above the upper surface of the table 1 is a short deflector baifle 9 and a long removal baffle I0, the lower edges of the baflles contacting the surface of the table 1. FIG. 3 shows the support arrangement for each of the baffles 9 and 10, comprising asupport shaft 11 and lower extremity of which is attached to a clamping member 12 extending the length of the baffle, in which flexible material 13 forming the baflle is located. The lower edge of the flexible material contacts the surface of the table 1 and leads into the direction of rotation of the table 1, indicated by the arrow A. Adjustment of the support shafts I1 enables the position and angle of the bafiles 9 and 10 to be adjusted in relation to the upper surface of the table I.
The table 1 is mounted on adrive shaft 14 which is coupled to a variable speed drive motor 15. Surrounding the periphery of the table I is a collecting tray I6 which is subdivided intosections 17 byvertical plates 18. Each of the sections I7 has a sloping bottom (sloping in the direction of the arrow B) leading into acollecting chute 19, which leads into acollecting vessel 20.
In operation nuclear fuel particles to be graded according to their sphericity are fed into the main hopper 7 and from there pass into thesmall hopper 2 which is vibrated by the 50 Hz vibrator 4 via the vibrator arm 5. Particles are thus fed one after the other from thehopper 2 along the feed chute 3 and are discharged on to the upper surface of the table 1. The particles are then carried round on the table 1 and at the same time roll outwards towards the edge of the table 1 as a result of centrifugal force, the rate of movement of the particles over the upper surface of the table 1 depending on the frictional forces acting between each particle and the surface of the table 1. These frictional forces are a function of the sphericity of the particle and of any surface faults, irregularities or flats which are present. As each particle moves towards the edge of the table 1 it is also accelerated circumferentially as a result of its continuously increasing radius of travel over the surface of the table 1. Each particle is therefore rolling under the influence of two continuously increasing forces acting at right angles and thus the majority of the surface of each particle contacts the table 1 at some time during its travel from the center to the outer edge of the table 1. Thus those particles having good sphericity move rapidly to the edge of the table 1 following paths such as the dotted line C, in FIG. 1 whilst those particles having poorer sphericity and surface faults are carried further around the table 1 following paths such as the dotted lines C, and C, of FIG. 1. Particles of yet poorer sphericity are carried even further around the table 1 following paths such as the dotted lines C and C, of FIG. l before ejection from the edge of the table I. Particles with very poor shape will follow paths such as the dotted line C, in FIG. I or with broken particles and other debris will not move over the edge of the table 1 but will follow paths such as the dotted lines C and C in FIG. 1. The deflector baffle 9 ensures that particles following the inner paths such as shown by the dotted line C are deflected outwards so that they take a path to meet the deflector baffle 10 and do not accumulate in the center of the table 1 where they could block the discharge of fresh particles from the feed chute 3. The particles following paths such as shown by the dotted lines C and Q in FIG. I are diverted to the edge of the table 1 by the baflle l0 and are ejected from the edge of the table 1.
The particles ejected from the edge of the table 1 fall into one of thesections 17 of the collectingtray 16, according to their degree of sphericity and will pass into the associated collection chute l9 and from there into the associatedcollection vessel 20.
Typically the rotating table 1 may be of Perspex (RTM) Bakelite" (RTM) or metal. In the case of tables of non conducting material such as Perspex or Bakelite the upper surface is rendered electrically conducting by the application of a film of a metallic nature or colloidal graphite. This is done in order to avoid the buildup of static charges on the surface of the table which can interfere with the free movement of the parti cles. The speed of rotation of the table 1 may be in the range -50 revolutions per minute whilst table diameters within the range of l2-25 inches may be used, the larger diameter tables enabling a higher particle feed rate to be employed. Satisfactory baffles 9 and 10 are fabricated from 50 mm polyethylene sheet.
The apparatus described above is capable of accommodating a wide variety of particulate materials and sizes by varying the rate of rotation of the table 1, by adjusting the variable speed drive motor 15. In addition the position and angle of the baffles 9 and I0 and of the hopper system (2 and 7) can be adjusted to alter the selectivity of the method.
I claim:
1. Apparatus for the grading of particles according to their sphericity comprising a substantially horizontally disposed rotatable table mounted on a drive shaft coupled to drive means for rotating said table in one direction at a constant speed, feed means for feeding particles at a controlled rate to the center region of the upper surface of the table, fixed guide means extending obliquely with respect to the periphery of the table and contacting the upper surface of the table to guide particles off the surface of the table if such particles have not moved to the periphery of the table during one revolution of the table, collection means being provided around the periphery of the table for collecting particles dropping over the edge of the table, said feed means comprising two hoppers one above the other, the upper one having an outlet dipping into the lower one and the lower one having a restricted opening discharging to the table.
2. Apparatus for the grading of particles according to their sphericity according to claim 1 wherein the guide means are of flexible material where they contact the table and are capable of adjustment of their position and angle in relation to the upper surface of the table.
3. Apparatus for the grading of particles according to their sphericity according to claim I wherein the rotatable table is of a non-conducting material having its upper surface rendered electrically conducting by the application of a film of a suitable metal or colloidal graphite.
4. Apparatus according to claim 1 wherein the lower of said two hoppers has means to cause it to vibrate.
5. Apparatus according to claim 1 wherein said guide means is in two parts, namely, a shorter part being located radially inwards of the feed means and a longer part being located radially outwards of the feed means so that particles deflected by the short part are caused to take up paths such that they are guided from the table by the long part.
6. Apparatus according to claim 1 in which said collecting means has a plurality of sections for collecting particles leav ing the table over a corresponding plurality of arcs of the periphery of the table.
Claims (6)
1. Apparatus for the grading of particles according to their sphericity comprising a substantially horizontally disposed rotatable table mounted on a drive shaft coupled to drive means for rotating said table in one direction at a constant speed, feed means for feeding particles at a controlled rate to the center region of the upper surface of the table, fixed guide means extending obliquely with respect to the periphery of the table and contacting the upper surface of the table to guide particles off the surface of the table if such particles have not moved to the periphery of the table during one revolution of the table, collection means being provided around the periphery of the table for collecting particles dropping over the edge of the table, said feed means comprising two hoppers one above the other, the upper one having an outlet dipping into the lower one and the lower one having a restricted opening discharging to the table.
2. Apparatus for the grading of particles according to their sphericity according to claim 1 wherein the guide means are of flexible material where they contact the table and are capable of adjustment of their position and angle in relation to the upper surface of the table.
3. AppAratus for the grading of particles according to their sphericity according to claim 1 wherein the rotatable table is of a non-conducting material having its upper surface rendered electrically conducting by the application of a film of a suitable metal or colloidal graphite.
4. Apparatus according to claim 1 wherein the lower of said two hoppers has means to cause it to vibrate.
5. Apparatus according to claim 1 wherein said guide means is in two parts, namely, a shorter part being located radially inwards of the feed means and a longer part being located radially outwards of the feed means so that particles deflected by the short part are caused to take up paths such that they are guided from the table by the long part.
6. Apparatus according to claim 1 in which said collecting means has a plurality of sections for collecting particles leaving the table over a corresponding plurality of arcs of the periphery of the table.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4223169 | 1969-08-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3672500Atrue US3672500A (en) | 1972-06-27 |
Family
ID=10423454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US65963AExpired - LifetimeUS3672500A (en) | 1969-08-25 | 1970-08-21 | Apparatus for grading particles according to their sphericity |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3672500A (en) |
| DE (1) | DE2041851A1 (en) |
| FR (1) | FR2060671A5 (en) |
| GB (1) | GB1297788A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4538735A (en)* | 1981-09-23 | 1985-09-03 | Shell Oil Company | Apparatus for separating solids of different shapes |
| EP0192479A3 (en)* | 1985-02-21 | 1986-12-30 | United Kingdom Atomic Energy Authority | Method and apparatus for mechanically classifying rolling bodies |
| WO1989002320A1 (en)* | 1987-09-17 | 1989-03-23 | Cyprus Industrial Minerals Company | Method and apparatus for friction sorting of particulate materials |
| US4839033A (en)* | 1987-08-07 | 1989-06-13 | Ichinoseki National College Of Technology | Apparatus for separating spherical from non-spherical particles |
| FR2635475A1 (en)* | 1987-09-17 | 1990-02-23 | Cyprus Ind Minerals Corp | Method and apparatus for sorting particulate materials by friction |
| US4986424A (en)* | 1985-10-23 | 1991-01-22 | Europeenne De Retraitement | Process and apparatus for separating materials of different shapes or sizes |
| US5080235A (en)* | 1990-09-27 | 1992-01-14 | Cyprus Mines Corporation | Small particle separator |
| AU622671B2 (en)* | 1989-03-31 | 1992-04-16 | Cyprus Industrial Minerals Company | Method and apparatus for friction sorting of particulate materials |
| US5287391A (en)* | 1992-02-15 | 1994-02-15 | British Nuclear Fuels Plc | Metering system |
| US5630554A (en)* | 1995-02-21 | 1997-05-20 | Dowa Mining Co., Ltd. | Method of separating and recovering valuable metals and non-metals from composite materials |
| US20070072527A1 (en)* | 2005-09-27 | 2007-03-29 | 3M Innovative Properties Company | Shape controlled abrasive article and method |
| US20100326894A1 (en)* | 2009-06-25 | 2010-12-30 | 3M Innovative Properties Company | Method of sorting abrasive particles, abrasive particle distributions, and abrasive articles including the same |
| US9481824B2 (en) | 2012-06-29 | 2016-11-01 | Rebecca Ayers | Process for producing a proppant |
| US10350642B2 (en)* | 2015-11-13 | 2019-07-16 | 3M Innovative Properties Company | Method of shape sorting crushed abrasive particles |
| CN113351467A (en)* | 2020-03-04 | 2021-09-07 | 清华大学 | Spherical fuel particle vibration sorting device |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1486862A (en)* | 1975-04-03 | 1977-09-28 | Vacu Blast Ltd | Classification of particles |
| FR2415949A1 (en)* | 1978-01-31 | 1979-08-31 | Darbonne Ste Civile | Picker for strawberry plants - which are oriented and discharged by centrifuge to conveyor before passing to counting and bundling stations |
| GB2313071A (en)* | 1996-05-14 | 1997-11-19 | Biomass Recycling Ltd | Material separating system |
| RU2168377C2 (en)* | 1996-12-17 | 2001-06-10 | Косяков Виктор Александрович | Method of separation of spherical particles |
| RU2130818C1 (en)* | 1997-12-10 | 1999-05-27 | Всероссийский научно-исследовательский институт механизации сельского хозяйства | Separator for loose materials |
| RU2193461C1 (en)* | 2001-05-25 | 2002-11-27 | Мордовский государственный университет им. Н.П.Огарева | Apparatus for cleaning green pea seeds from smooth grain fraction |
| RU2316936C1 (en)* | 2006-07-20 | 2008-02-20 | Федеральное государственное образовательное учреждение высшего профессионального образования Кубанский государственный аграрный университет | Method for separation of esparcet and dog's tongue seeds |
| CN115970901B (en)* | 2022-12-16 | 2025-08-05 | 秦皇岛琨煜晶材科技有限公司 | Diamond electric separator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US468066A (en)* | 1892-02-02 | Separator | ||
| US1030042A (en)* | 1910-03-23 | 1912-06-18 | George W Wilmot | Apparatus for separating refuse from coal. |
| US1058259A (en)* | 1912-08-21 | 1913-04-08 | Samuel T Pratt | Coal-separator. |
| US3485360A (en)* | 1967-08-11 | 1969-12-23 | Atomic Energy Commission | Particle separator |
- 1969
- 1969-08-25GBGB4223169Apatent/GB1297788A/ennot_activeExpired
- 1970
- 1970-08-21USUS65963Apatent/US3672500A/ennot_activeExpired - Lifetime
- 1970-08-24DEDE19702041851patent/DE2041851A1/enactivePending
- 1970-08-24FRFR7030888Apatent/FR2060671A5/frnot_activeExpired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US468066A (en)* | 1892-02-02 | Separator | ||
| US1030042A (en)* | 1910-03-23 | 1912-06-18 | George W Wilmot | Apparatus for separating refuse from coal. |
| US1058259A (en)* | 1912-08-21 | 1913-04-08 | Samuel T Pratt | Coal-separator. |
| US3485360A (en)* | 1967-08-11 | 1969-12-23 | Atomic Energy Commission | Particle separator |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4538735A (en)* | 1981-09-23 | 1985-09-03 | Shell Oil Company | Apparatus for separating solids of different shapes |
| EP0192479A3 (en)* | 1985-02-21 | 1986-12-30 | United Kingdom Atomic Energy Authority | Method and apparatus for mechanically classifying rolling bodies |
| US4986424A (en)* | 1985-10-23 | 1991-01-22 | Europeenne De Retraitement | Process and apparatus for separating materials of different shapes or sizes |
| US4839033A (en)* | 1987-08-07 | 1989-06-13 | Ichinoseki National College Of Technology | Apparatus for separating spherical from non-spherical particles |
| WO1989002320A1 (en)* | 1987-09-17 | 1989-03-23 | Cyprus Industrial Minerals Company | Method and apparatus for friction sorting of particulate materials |
| GR880100622A (en)* | 1987-09-17 | 1989-06-22 | Cyprus Ind Minerals Corp | Method and apparatus for feiction sorting of particulate materials |
| FR2635475A1 (en)* | 1987-09-17 | 1990-02-23 | Cyprus Ind Minerals Corp | Method and apparatus for sorting particulate materials by friction |
| US5069346A (en)* | 1987-09-17 | 1991-12-03 | Cyprus Mines Corporation | Method and apparatus for friction sorting of particulate materials |
| AU622671B2 (en)* | 1989-03-31 | 1992-04-16 | Cyprus Industrial Minerals Company | Method and apparatus for friction sorting of particulate materials |
| US5080235A (en)* | 1990-09-27 | 1992-01-14 | Cyprus Mines Corporation | Small particle separator |
| US5287391A (en)* | 1992-02-15 | 1994-02-15 | British Nuclear Fuels Plc | Metering system |
| US5630554A (en)* | 1995-02-21 | 1997-05-20 | Dowa Mining Co., Ltd. | Method of separating and recovering valuable metals and non-metals from composite materials |
| US20070072527A1 (en)* | 2005-09-27 | 2007-03-29 | 3M Innovative Properties Company | Shape controlled abrasive article and method |
| US7556558B2 (en) | 2005-09-27 | 2009-07-07 | 3M Innovative Properties Company | Shape controlled abrasive article and method |
| US20100326894A1 (en)* | 2009-06-25 | 2010-12-30 | 3M Innovative Properties Company | Method of sorting abrasive particles, abrasive particle distributions, and abrasive articles including the same |
| US8628597B2 (en) | 2009-06-25 | 2014-01-14 | 3M Innovative Properties Company | Method of sorting abrasive particles, abrasive particle distributions, and abrasive articles including the same |
| US8961632B2 (en) | 2009-06-25 | 2015-02-24 | 3M Innovative Properties Company | Method of sorting abrasive particles, abrasive particle distributions, and abrasive articles including the same |
| US9481824B2 (en) | 2012-06-29 | 2016-11-01 | Rebecca Ayers | Process for producing a proppant |
| US10350642B2 (en)* | 2015-11-13 | 2019-07-16 | 3M Innovative Properties Company | Method of shape sorting crushed abrasive particles |
| CN113351467A (en)* | 2020-03-04 | 2021-09-07 | 清华大学 | Spherical fuel particle vibration sorting device |
| CN113351467B (en)* | 2020-03-04 | 2023-01-20 | 清华大学 | Spherical fuel particle vibration sorting device |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2041851A1 (en) | 1971-03-11 |
| FR2060671A5 (en) | 1971-06-18 |
| GB1297788A (en) | 1972-11-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3672500A (en) | Apparatus for grading particles according to their sphericity | |
| CN109894370B (en) | Sphere material roundness sorting machine | |
| US3049215A (en) | Single row feeder | |
| GB1322192A (en) | Trash separating apparatus | |
| US4059189A (en) | Classification of particles | |
| US5458245A (en) | Device for cleaning a mixture of substantially granular grains and method for cleaning this mixture of grains | |
| US3910835A (en) | Apparatus and method for separating particles having different coefficients of friction | |
| US3900107A (en) | Rotating method of sorting particulate articles | |
| US2807350A (en) | Vibratory orienting feeder | |
| JPS6128388B2 (en) | ||
| US3485360A (en) | Particle separator | |
| US2582007A (en) | Fish grading apparatus | |
| US4094412A (en) | Rolling method of sorting particulate articles | |
| US3969224A (en) | Method and apparatus for separating particulate material | |
| RU2184624C2 (en) | Rotating probability screen | |
| Hayes | Improvements in particle classifying equipment | |
| US2658616A (en) | Process for classifying iron shot | |
| JPH07163946A (en) | Size sorter | |
| Viswanathan et al. | Separation Based on Shape Part I: Recovery Efficiency of Spherical Particles | |
| US4157371A (en) | Method of agglomerating fine powders | |
| CA1231319A (en) | Annular particle stream sorting system with x-ray containment enhancement | |
| US4747939A (en) | Particle classifier | |
| US3015394A (en) | Magnetic conveying apparatus | |
| US2302532A (en) | Separation of bodies of different physical properties | |
| GB2121322A (en) | Separating agricultural produce from other materials |