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ISSN 0536-1028 (Print)              ISSN 2686-9853 (Online)  


Rakhmeev R. N., Voiloshnikov G. I., Fedorov Iu. O., Chikin A. Iu. – IRGIREDMET JSC, Irkutsk, the Russian
Federation. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
88 «Известия вузов. Горный журнал», № 5, 2017 ISSN 0536-1028
The article describes the results of the laboratory experiments for X-ray radiometrical method of separation of the –6+3 mm
size diamond-bearing gravity concentrate at the X-ray fluorescence separator with gas detector. In the result of the
laboratory experiments over the formed collection of diamond crystals and main associated minerals and rocks their
substantial difference within analytical areas of calcium, iron, and zircon has been revealed – chemical elements not
presented in diamond crystals and widely presented in other grains. At that, the scattered X-radiation level of diamonds
is significantly higher than the level of associated minerals and rocks. The specified differences are correct for all diamond
crystals regardless of their X-ray fluorescence capacity, and are used as a main indicator of separation. The said
experiments showed demonstratively that the proposed separation method and the identified separation indicator provide
recovery of all diamonds, including rejected in tailings of X-ray fluorescence separators, with high efficiency and selectivity.
Key words: diamond; upgrading; recovery; X-ray fluorescence separator; secondary X-ray spectrum; scattered radiation;
characteristic radiation; fluorescence.
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