WO2008020343A3 - A sorter - Google Patents

A sorter Download PDF

Info

Publication number
WO2008020343A3
WO2008020343A3 PCT/IB2007/051524 IB2007051524W WO2008020343A3 WO 2008020343 A3 WO2008020343 A3 WO 2008020343A3 IB 2007051524 W IB2007051524 W IB 2007051524W WO 2008020343 A3 WO2008020343 A3 WO 2008020343A3
Authority
WO
WIPO (PCT)
Prior art keywords
light
receivers
containing material
sorter
diamond containing
Prior art date
Application number
PCT/IB2007/051524
Other languages
French (fr)
Other versions
WO2008020343A2 (en
Inventor
Adriaan Hendrikus Botha
Original Assignee
Primus Special Projects Pty Lt
Adriaan Hendrikus Botha
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Primus Special Projects Pty Lt, Adriaan Hendrikus Botha filed Critical Primus Special Projects Pty Lt
Publication of WO2008020343A2 publication Critical patent/WO2008020343A2/en
Publication of WO2008020343A3 publication Critical patent/WO2008020343A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/65—Raman scattering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
    • B07C5/3425—Sorting according to other particular properties according to optical properties, e.g. colour of granular material, e.g. ore particles, grain
    • B07C5/3427—Sorting according to other particular properties according to optical properties, e.g. colour of granular material, e.g. ore particles, grain by changing or intensifying the optical properties prior to scanning, e.g. by inducing fluorescence under UV or x-radiation, subjecting the material to a chemical reaction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/85—Investigating moving fluids or granular solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/87—Investigating jewels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/064—Stray light conditioning
    • G01N2201/0642—Light traps; baffles

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

According to a first embodiment there is provided a sorter including a plurality of light emitters and a plurality of light receivers. A feeding system is used for feeding diamond containing material between the plurality of light emitters and plurality of light receivers. A processor is used to receive signals from the light receivers and to use the signals to detect diamonds within the diamond containing material and a sorting mechanism responsive to the processor to remove diamonds from the diamond containing material. The plurality of light emitters are typically lasers and the plurality of light receivers are typically photon multiplier tubes. The sorter may include at least one Raman filter located in front of the lighter receivers.
PCT/IB2007/051524 2006-08-18 2007-04-25 A sorter WO2008020343A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200606911 2006-08-18
ZA2006/06911 2006-08-18

Publications (2)

Publication Number Publication Date
WO2008020343A2 WO2008020343A2 (en) 2008-02-21
WO2008020343A3 true WO2008020343A3 (en) 2008-04-24

Family

ID=38492497

Family Applications (3)

Application Number Title Priority Date Filing Date
PCT/IB2007/051534 WO2008020344A1 (en) 2006-08-18 2007-04-25 A light detecting module for a sorter
PCT/IB2007/051535 WO2008020345A1 (en) 2006-08-18 2007-04-25 An illuminating module for a sorter
PCT/IB2007/051524 WO2008020343A2 (en) 2006-08-18 2007-04-25 A sorter

Family Applications Before (2)

Application Number Title Priority Date Filing Date
PCT/IB2007/051534 WO2008020344A1 (en) 2006-08-18 2007-04-25 A light detecting module for a sorter
PCT/IB2007/051535 WO2008020345A1 (en) 2006-08-18 2007-04-25 An illuminating module for a sorter

Country Status (2)

Country Link
WO (3) WO2008020344A1 (en)
ZA (1) ZA200901160B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2554467A (en) * 2016-09-30 2018-04-04 De Beers Uk Ltd Apparatus for sorting gemstones

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0130715A2 (en) * 1983-06-30 1985-01-09 Sortex Limited Sorting machine
WO1988001378A1 (en) * 1986-08-20 1988-02-25 The British Petroleum Company P.L.C. Separation process
WO1988005534A1 (en) * 1987-01-16 1988-07-28 The British Petroleum Company P.L.C. Separation process for diamonds
GB2233759A (en) * 1989-06-12 1991-01-16 De Beers Ind Diamond "Particulate ore sorting"
US5206699A (en) * 1988-05-06 1993-04-27 Gersan Establishment Sensing a narrow frequency band of radiation and gemstones
US5628410A (en) * 1991-02-20 1997-05-13 Gersan Establishment Classifying or sorting
WO2002097409A1 (en) * 2001-05-31 2002-12-05 Rap.Id Particle Systems Gmbh Method for the automated recognition, spectroscopic analysis and identification of particles

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3469103A (en) * 1966-01-18 1969-09-23 Navigation Computer Corp Photoelectric punched paper tape reader rejecting diffused light rays
DE3023211A1 (en) * 1979-06-28 1981-01-22 Ti Fords Ltd METHOD AND DEVICE FOR DETERMINING AN AQUEOUS LIQUID IN BOTTLES AND CONTAINERS
CA1201299A (en) * 1982-11-29 1986-03-04 Albert Brunsting Optical readhead
US4743091A (en) * 1986-10-30 1988-05-10 Daniel Gelbart Two dimensional laser diode array
US4798956A (en) * 1987-07-15 1989-01-17 Hochstein Peter A Electro-optical windshield moisture sensing
US4784486A (en) * 1987-10-06 1988-11-15 Albion Instruments Multi-channel molecular gas analysis by laser-activated Raman light scattering
US5327444A (en) * 1989-04-20 1994-07-05 Massachusetts Institute Of Technology Solid state waveguide lasers
US5726749A (en) * 1996-09-20 1998-03-10 Libbey-Owens-Ford Co. Method and apparatus for inspection and evaluation of angular deviation and distortion defects for transparent sheets
US5995475A (en) * 1997-11-13 1999-11-30 Cero Products Inc. Two dimensional laser diode array using multimode lasers
US6157449A (en) * 1998-10-19 2000-12-05 Symyx Technologies Depolarized light scattering array apparatus and method of using same
FR2852533B1 (en) * 2003-03-20 2006-10-06 Arck Electronique HOLES DETECTION DEVICE IN CONTINUOUS BAND THREADED MATERIALS

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0130715A2 (en) * 1983-06-30 1985-01-09 Sortex Limited Sorting machine
WO1988001378A1 (en) * 1986-08-20 1988-02-25 The British Petroleum Company P.L.C. Separation process
WO1988005534A1 (en) * 1987-01-16 1988-07-28 The British Petroleum Company P.L.C. Separation process for diamonds
US5206699A (en) * 1988-05-06 1993-04-27 Gersan Establishment Sensing a narrow frequency band of radiation and gemstones
GB2233759A (en) * 1989-06-12 1991-01-16 De Beers Ind Diamond "Particulate ore sorting"
US5628410A (en) * 1991-02-20 1997-05-13 Gersan Establishment Classifying or sorting
WO2002097409A1 (en) * 2001-05-31 2002-12-05 Rap.Id Particle Systems Gmbh Method for the automated recognition, spectroscopic analysis and identification of particles

Also Published As

Publication number Publication date
WO2008020345A1 (en) 2008-02-21
ZA200901160B (en) 2010-05-26
WO2008020343A2 (en) 2008-02-21
WO2008020344A1 (en) 2008-02-21

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