METHOD OF X-RAY LUMINESCENT SEPARATION OF MINERALS AND X-RAY LUMINESCENT SEPARATOR THEREFOR Russian patent published in 2016 - IPC B07C5/342 

FIELD: chemistry.

SUBSTANCE: method for x-ray luminescent separation of minerals includes two-sided irradiation of a material stream with periodic pulse sequences of exciting x-ray radiation with detecting luminescence signal intensity of minerals using photodetectors on each side of stream, processing of detected signal in real time. Further, method includes illuminating stream of material on two sides in zones adjacent to zones irradiated with x-ray, periodic sequences of light pulses, detecting light images of stream of minerals using photodetectors of matrix type in form of raster image frames, selecting in stream image frames separate grains of material. Separation features used are absorption (degree of absorption by mineral of components of light flux), chromatic (colour), geometric, texture, kinetics of luminescence (time constants, ratio of components), comparing obtained parameters for each separation feature with preset threshold values and separating valuable component of dressed mineral based on value of integral multiparameter determination criterion of various mineral fractions. Separator realising present method comprises means of feeding material (feeder), means of conveying stream of material to be separated (tray), pulsed excitation x-ray radiation sources, located above and below surface of stream, photodetectors for detecting x-ray luminescence signals, located above and below surface of stream, made on basis of colour digital video cameras and installed on both sides of stream of material matrix photodetectors, pulse illuminators with controlled parameters of light flux, device for separation of dressed mineral, receiver of extracted mineral, receiver tail product, devices for processing signals, controlling and monitoring operation of separator. Signal processing device in addition to functions for determining luminescence signal is equipped with functions of parallel processing of images of material stream of two or more video cameras, synchronisation of systems of recording and extraction of minerals, calculating values of separation features, selection of parameters and criteria of determining various mineral fractions, determining motion parameters of minerals, determining and adjusting parameters of stream of material, evaluating state of systems detecting and extracting material of separator.

EFFECT: higher accuracy of determining position and motion path of minerals, measurement and stabilisation of flow parameters of material, monitoring accuracy of cutoff, which makes it possible to more efficiently carry out process of x-ray luminescent separation.

5 cl, 3 dwg