METHOD OF SEPARATION OF MINERALS BY THEIR LUMINESCENT PROPERTIES Russian patent published in 2009 - IPC B07C5/342 B03B13/06 

FIELD: mining.

SUBSTANCE: invention refers to extraction of minerals, particularly to methods of concentrating crushed mineral material. The method consists in transporting a flow of separated material, in pulse irradiation of this material with exciting radiation, in recording intensity of luminescent mineral signal, in processing this signal for determination of normalised auto-correlated function and in comparing normalised auto-correlation function with a specified value. Also on-line there is performed parallel recording of the luminescent mineral signal intensity in several ranges of values: with a fixed coefficient of amplification and simultaneously with N-multiple decrease of coefficient of amplification, further there is performed processing of signal of luminescent mineral for determination of normalised auto-correlation function; additional processing of the recorded signal is carried out in the range of its true values. Mineral is chosen from separated material in the case, if obtained values of all determined properties of recorded signal of fluorescence are in preliminary specified for each of them range.

EFFECT: increased on-line selectivity of concentrated material separation from bearing material and associated minerals.

2 dwg