CA2139537A1 - Method and apparatus for the classification of matter - Google Patents

Method and apparatus for the classification of matter

Info

Publication number
CA2139537A1
CA2139537A1 CA002139537A CA2139537A CA2139537A1 CA 2139537 A1 CA2139537 A1 CA 2139537A1 CA 002139537 A CA002139537 A CA 002139537A CA 2139537 A CA2139537 A CA 2139537A CA 2139537 A1 CA2139537 A1 CA 2139537A1
Authority
CA
Canada
Prior art keywords
particles
radiation
derived
values
value
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.)
Granted
Application number
CA002139537A
Other languages
French (fr)
Other versions
CA2139537C (en
Inventor
Ulf Anders Staffan Tapper
Jacek Guzek
Sudhir Nundhlal Surujhlal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Element Six Pty Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2139537A1 publication Critical patent/CA2139537A1/en
Application granted granted Critical
Publication of CA2139537C publication Critical patent/CA2139537C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
    • G01N23/083—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being X-rays
    • 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
    • B07C5/3416—Sorting according to other particular properties according to radiation transmissivity, e.g. for light, x-rays, particle radiation

Abstract

One aspect of the invention concerns a method of classifying particles according to their composition. In the method the particles (12, 68, 200) are irradiated with electromagnetic radiation, typically X-radiation, at respective first and second energy levels. First and second values are derived which are representative of the attenuation of the radiation by each particle. A third value is then derived as the difference between or ratio of the first and second values, and the particles are classified according to whether the third value isindicative of the presence in the particles of a particular substance. In one application of the method it can be used to classify diamondiferous kimberlite into a fraction consisting of kimerlite particles containing diamond inclusions and a fraction consisting of barren kimberlite particles.
CA002139537A 1994-01-07 1995-01-04 Method and apparatus for the classification of matter Expired - Fee Related CA2139537C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA9498 1994-01-07
ZA94/0098 1994-01-07

Publications (2)

Publication Number Publication Date
CA2139537A1 true CA2139537A1 (en) 1995-07-08
CA2139537C CA2139537C (en) 2007-04-24

Family

ID=25583578

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002139537A Expired - Fee Related CA2139537C (en) 1994-01-07 1995-01-04 Method and apparatus for the classification of matter

Country Status (6)

Country Link
AU (1) AU689515B2 (en)
BR (1) BR9500038A (en)
CA (1) CA2139537C (en)
GB (1) GB2285506B (en)
RU (1) RU95100772A (en)
ZA (1) ZA9551B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113210117A (en) * 2021-05-13 2021-08-06 盾构及掘进技术国家重点实验室 Rock sorting and crushing system based on infrared thermal imaging and microwave heating

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19600241C2 (en) * 1995-01-13 2002-08-01 Bruker Biospin Gmbh Method and device for finding gemstones in a surrounding substance by means of magnetic resonance
AUPN226295A0 (en) * 1995-04-07 1995-05-04 Technological Resources Pty Limited A method and an apparatus for analysing a material
ATE331947T1 (en) * 2001-10-22 2006-07-15 Miconos Technology Ltd X-RAY INSPECTION SYSTEM FOR PRODUCTS, ESPECIALLY FOOD
US7949101B2 (en) 2005-12-16 2011-05-24 Rapiscan Systems, Inc. X-ray scanners and X-ray sources therefor
US8243876B2 (en) 2003-04-25 2012-08-14 Rapiscan Systems, Inc. X-ray scanners
US9113839B2 (en) 2003-04-25 2015-08-25 Rapiscon Systems, Inc. X-ray inspection system and method
US8837669B2 (en) 2003-04-25 2014-09-16 Rapiscan Systems, Inc. X-ray scanning system
US8223919B2 (en) 2003-04-25 2012-07-17 Rapiscan Systems, Inc. X-ray tomographic inspection systems for the identification of specific target items
GB0525593D0 (en) 2005-12-16 2006-01-25 Cxr Ltd X-ray tomography inspection systems
US8451974B2 (en) 2003-04-25 2013-05-28 Rapiscan Systems, Inc. X-ray tomographic inspection system for the identification of specific target items
DE102004001790A1 (en) * 2004-01-12 2005-08-04 Commodas Daten- Und Systemtechnik Nach Mass Gmbh Device for separating bulk materials
US7564943B2 (en) * 2004-03-01 2009-07-21 Spectramet, Llc Method and apparatus for sorting materials according to relative composition
RU2334974C2 (en) * 2004-03-12 2008-09-27 Зелльшоп Сусан Мариетта Detection of diamonds
DE102005010867A1 (en) * 2005-03-07 2006-10-19 Commodas Daten- Und Systemtechnik Nach Mass Gmbh Particle analysis or identification device for use in conveying flow, has linear sensors and processing unit calculating absorption characteristic of particles from signals of sensors of different spectral sensitivity
EP2243021B1 (en) 2008-02-15 2018-01-24 Mayo Foundation For Medical Education And Research System and method for quantitative imaging of chemical composition to decompose multiple materials
PL2198983T3 (en) 2008-12-19 2012-04-30 Omya Int Ag Method for separating mineral impurities from calcium carbonate-containing rocks by X-ray sorting
US8610019B2 (en) 2009-02-27 2013-12-17 Mineral Separation Technologies Inc. Methods for sorting materials
EP2661331B1 (en) 2011-01-07 2019-03-13 Huron Valley Steel Corporation Scrap metal sorting system
RU2465051C2 (en) * 2011-02-14 2012-10-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Кабардино-Балкарский государственный университет им. Х.М. Бербекова" (КБГУ) Method of ore-picking
RU2470714C1 (en) * 2011-07-21 2012-12-27 Общество с ограниченной ответственностью "Лаборатория рентгенодиагностических систем" Method of separating diamonds
US9114433B2 (en) 2012-01-17 2015-08-25 Mineral Separation Technologies, Inc. Multi-fractional coal sorter and method of use thereof
US8750561B2 (en) * 2012-02-29 2014-06-10 United Technologies Corporation Method of detecting material in a part
GB201220418D0 (en) * 2012-11-13 2012-12-26 Kromek Ltd Identification of materials
GB201220419D0 (en) 2012-11-13 2012-12-26 Kromek Ltd Identification of materials
RU2551486C1 (en) * 2013-12-24 2015-05-27 Открытое акционерное общество "Иркутский научно-исследовательский институт благородных и редких металлов и алмазов" ОАО "Иргиредмет" Method for x-ray radiometric separation of diamond-bearing materials
RU2623692C2 (en) * 2015-10-15 2017-06-28 Общество с ограниченной ответственностью "Лаборатория Скантроник" System and method for detecting diamonds in kimberlite and method for pre-beneficiating diamonds with their use
CN107470182A (en) * 2016-06-08 2017-12-15 郑州立子加速器科技有限公司 A kind of gamma-rays tobacco leaf screening plant
CN108273752A (en) * 2018-03-13 2018-07-13 顺丰科技有限公司 Dust-extraction unit and automatic sorting apparatus for automatic sorting apparatus
AU2020466611A1 (en) * 2020-09-02 2023-05-04 Botswana International University Of Science And Technology Method and system for sorting of diamonds
WO2023194919A1 (en) * 2022-04-05 2023-10-12 Gem Recovery Systems Limited Method for diamond detection

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU530206B2 (en) * 1979-06-26 1983-07-07 De Beers Industrial Diamond Division (Proprietary) Limited Detection of low atomic number particles
GB2091417B (en) * 1981-01-19 1985-05-01 Picker Int Ltd Apparatus for examining materials
GB8700917D0 (en) * 1987-01-16 1987-02-18 British Petroleum Co Plc Separation process
US5164590A (en) * 1990-01-26 1992-11-17 Mobil Oil Corporation Method for evaluating core samples from x-ray energy attenuation measurements
GB9211734D0 (en) * 1992-06-03 1992-07-15 Gersan Ets Prospecting for diamonds

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113210117A (en) * 2021-05-13 2021-08-06 盾构及掘进技术国家重点实验室 Rock sorting and crushing system based on infrared thermal imaging and microwave heating

Also Published As

Publication number Publication date
AU1005495A (en) 1995-07-20
GB9500269D0 (en) 1995-03-01
GB2285506A (en) 1995-07-12
GB2285506B (en) 1998-07-01
BR9500038A (en) 1995-10-03
RU95100772A (en) 1996-11-10
CA2139537C (en) 2007-04-24
AU689515B2 (en) 1998-04-02
ZA9551B (en) 1995-09-11

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Effective date: 20130104

MKLA Lapsed

Effective date: 20130104