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

FIELD: mining.

SUBSTANCE: invention refers to concentration of minerals, particularly to methods of roentgen-luminescent concentration of crushed mineral material of coarse fractions, size of which is comparable with length of zone of excitation-recording of separator. To achieve the said excitation of luminescence of minerals is performed with pulse roentgen radiation (PRR), further summary intensiveness of short component of luminescence (SCL) and prolonged component of luminescence (PCL) are measured at the moment of PRR operation; intensiveness of PCL is measured with delay after termination of PRR operation; values of ratio of summary intensiveness of SCL and PCL to intensiveness of PCL are determined and compared to a threshold value; further minerals are separated according to assumed determination. Also luminescence of minerals is excited with at least two PRR. At each pulse of PRR value of intensiveness of PCL is compared with preset threshold value and value of ratio of summary intensiveness of SCL and PCL to its intensiveness of PCL is recorded. Notably, value of above said ratio is accepted as equal to zero, if value of intensiveness of PCL is less, than the threshold one. Value of difference between current and preceding values of ratio of summary intensiveness of SCL and PCL to intensiveness of PCL is determined and determination "useful mineral" is assumed, if value of ratio of summary intensiveness of SCL and PCL to intensiveness of PCL is less, than preset threshold value and if simultaneously all values of difference between current and preceding values of above said ratio are positive.

EFFECT: upgraded selectiveness of roentgen-luminescent separation of minerals of coarse grades due to avoiding false extraction of associated minerals and consequently increased contents of useful mineral in concentrate (upgrading of condition).

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