G - Physics – 01 – N
Patent
G - Physics
01
N
358/5
G01N 23/20 (2006.01) G01N 23/22 (2006.01)
Patent
CA 1168766
ABSTRACT OF THE DISCLOSURE Disclosed is a method and an apparatus for analysing pieces of ore for the purpose of sorting. Each piece falling by the analyser is irradiated individually by means of two gamma radia- tion sources operating at different energy levels so selected that, as to the scattering effect, at one level the Compton effect is predominant and at the other level the Compton effect and the photoelectric effect compete with each other. The former effect is strongly dependent on the ordinal number of the ele- ment and, thus, by detecting with at least one detector the scattering intensities produced with the said two sources of radiation and comparing the scattering intensities with each other, the proportion of heavy elements in the ore piece can be determined and the ore piece can be classified on the basis thereof. For example, one energy dispersively operating scintillation detector can be used for detecting the scattered radiation.
385782
Kiuru Erkki
Sipila Heikki
Vaijarvi Seppo
Outokumpu Oy
Smart & Biggar
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