CA2268580C - Tri de diamants - Google Patents

Tri de diamants Download PDF

Info

Publication number: CA2268580C
Authority: CA; Canada
Prior art keywords: microwave; cavity; particles; diamond; magnetic field
Prior art date: 1998-04-14
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 - Fee Related

Application number

CA002268580A

Other languages

English (en)

Other versions

CA2268580A1 (fr

Inventor

Ulf Anders Staffan Tapper

George William Over

Peter Hofer

Grant Lysle High

Jan Abraham Van Wyk

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.)

De Beers Consolidated Mines Ltd

Original Assignee

De Beers Consolidated Mines Ltd

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.)

1998-04-14

Filing date

1999-04-12

Publication date

2006-12-05

1999-04-12 Application filed by De Beers Consolidated Mines Ltd filed Critical De Beers Consolidated Mines Ltd

1999-10-14 Publication of CA2268580A1 publication Critical patent/CA2268580A1/fr

2006-12-05 Application granted granted Critical

2006-12-05 Publication of CA2268580C publication Critical patent/CA2268580C/fr

2019-04-12 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

Links

239000010432 diamond Substances 0.000 title claims abstract description 70
239000002245 particle Substances 0.000 claims abstract description 91
229910003460 diamond Inorganic materials 0.000 claims abstract description 51
230000005855 radiation Effects 0.000 claims abstract description 26
238000000034 method Methods 0.000 claims abstract description 23
230000005291 magnetic effect Effects 0.000 claims abstract description 22
238000010521 absorption reaction Methods 0.000 claims abstract description 20
238000002044 microwave spectrum Methods 0.000 claims abstract description 16
230000004044 response Effects 0.000 claims abstract description 12
239000000463 material Substances 0.000 claims abstract description 6
238000004458 analytical method Methods 0.000 claims description 7
238000001228 spectrum Methods 0.000 claims description 7
238000001514 detection method Methods 0.000 claims description 3
238000000926 separation method Methods 0.000 claims description 2
238000004435 EPR spectroscopy Methods 0.000 abstract description 17
230000009102 absorption Effects 0.000 description 14
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
239000012535 impurity Substances 0.000 description 8
229910052757 nitrogen Inorganic materials 0.000 description 6
238000000862 absorption spectrum Methods 0.000 description 5
230000001419 dependent effect Effects 0.000 description 3
238000001069 Raman spectroscopy Methods 0.000 description 2
230000008901 benefit Effects 0.000 description 2
239000013078 crystal Substances 0.000 description 2
JJLJMEJHUUYSSY-UHFFFAOYSA-L Copper hydroxide Chemical compound [OH-].[OH-].[Cu+2] JJLJMEJHUUYSSY-UHFFFAOYSA-L 0.000 description 1
238000004140 cleaning Methods 0.000 description 1
230000005670 electromagnetic radiation Effects 0.000 description 1
230000004907 flux Effects 0.000 description 1
230000005484 gravity Effects 0.000 description 1
229910052500 inorganic mineral Inorganic materials 0.000 description 1
239000011707 mineral Substances 0.000 description 1
238000004513 sizing Methods 0.000 description 1
230000003595 spectral effect Effects 0.000 description 1
230000032258 transport Effects 0.000 description 1
239000002699 waste material Substances 0.000 description 1

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
- G01N21/84—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
- 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
- G01N21/85—Investigating moving fluids or granular solids
- G01N2021/8592—Grain or other flowing solid samples

Landscapes

General Health & Medical Sciences (AREA)
General Physics & Mathematics (AREA)
Life Sciences & Earth Sciences (AREA)
Chemical & Material Sciences (AREA)
Analytical Chemistry (AREA)
Biochemistry (AREA)
Immunology (AREA)
Physics & Mathematics (AREA)
Health & Medical Sciences (AREA)
Pathology (AREA)
Analysing Materials By The Use Of Radiation (AREA)
Crystals, And After-Treatments Of Crystals (AREA)
Physical Or Chemical Processes And Apparatus (AREA)
Carbon And Carbon Compounds (AREA)

CA002268580A 1998-04-14 1999-04-12 Tri de diamants Expired - Fee Related CA2268580C (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
ZA98/3100		1998-04-14
ZA983100		1998-04-14

Publications (2)

Publication Number	Publication Date
CA2268580A1 CA2268580A1 (fr)	1999-10-14
CA2268580C true CA2268580C (fr)	2006-12-05

Family

ID=25586950

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA002268580A Expired - Fee Related CA2268580C (fr)	1998-04-14	1999-04-12	Tri de diamants

Country Status (2)

Country	Link
AU (1)	AU742136B2 (fr)
CA (1)	CA2268580C (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102004021689B4 (de) *	2004-04-30	2013-03-21	Optosort Gmbh	Verfahren und Vorrichtung zur Sortierung von lichtbrechenden Partikeln
RU2353439C2 (ru) *	2007-05-02	2009-04-27	Научно-исследовательский институт прикладной физики ГОУ ВПО Иркутский государственный университет	Способ сепарации алмазосодержащих материалов и устройство для его осуществления
RU2475307C1 (ru) *	2011-06-24	2013-02-20	Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Иркутский государственный университет" (ФГБОУ ВПО "ИГУ")	Электрометрический сепаратор алмазов
RU2509614C1 (ru) *	2012-08-17	2014-03-20	Открытое акционерное общество "Иркутский научно-исследовательский институт благородных и редких металлов и алмазов" (ОАО "Иргиредмет")	Электрометрический сепаратор алмазов

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH03239978A (ja) *	1990-02-19	1991-10-25	Sumitomo Electric Ind Ltd	Ｅｓｒ標準試料
DE19600241C2 (de) *	1995-01-13	2002-08-01	Bruker Biospin Gmbh	Verfahren und Vorrichtung zum Auffinden von Edelsteinen in einer umgebenden Substanz mittels magnetischer Kernresonanz

1999
- 1999-04-12 CA CA002268580A patent/CA2268580C/fr not_active Expired - Fee Related
- 1999-04-13 AU AU23738/99A patent/AU742136B2/en not_active Ceased

Also Published As

Publication number	Publication date
CA2268580A1 (fr)	1999-10-14
AU2373899A (en)	1999-10-21
AU742136B2 (en)	2001-12-20

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Legal Events

Date	Code	Title	Description
2004-02-24	EEER	Examination request
2010-04-12	MKLA	Lapsed