On-line diamond detection

The invention concerns a method of sorting diamond-containing particles online from gangue particles. In the method, the particles (12) are subjected to irradiation by an X-ray or thermal neutron beam (20) from a source (18). A detector (22), arranged at a predetermined orientation to the incident b...

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Bibliographische Detailangaben
Hauptverfasser:	ULF ANDERS STAFFAN TAPPER, GEORGE WILLIAM OVER, STEPHANUS DAWID LE ROUX, JACEK GUZEK, DANIEL JACOBUS VAN DER MERWE
Format:	Patent
Sprache:	eng
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PERFORMING OPERATIONS PHYSICS POSTAL SORTING SEPARATING SOLIDS FROM SOLIDS SORTING SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTEDPIECE-MEAL, e.g. BY PICKING TESTING TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention concerns a method of sorting diamond-containing particles online from gangue particles. In the method, the particles (12) are subjected to irradiation by an X-ray or thermal neutron beam (20) from a source (18). A detector (22), arranged at a predetermined orientation to the incident beam (20), detects radiation which is elastically scattered by each particle. A diffraction spot pattern is then derived from the detected radiation and is compared, by a computer (24), with a diffraction spot pattern for diamond. A determination is made whether there is correlation between the patterns which is indicative of the presence, in the particle, of diamond. When such correlation exists, the relevant particles are separated from the other particle s.