METHOD OF USEFUL MATERIAL PARTICLES SEPARATION AND DEVICE TO THIS END Russian patent published in 2014 - IPC B03B13/00 B07C5/34 

FIELD: process engineering.

SUBSTANCE: proposed method comprises irradiation of material with primary X-ray beam, registration of penetrating X-ray radiation, comparison of the signal with threshold magnitude and isolation of useful material particle by comparison results. Analysed material is irradiated at conveyor belt by primary X-ray flat-parallel beam at beam divergence of not over 0.1 degree, its cross-section being smaller than useful material particle size. Then, intensity of said penetrating radiation is registered by position-sensitive detector. Note here that particle X position at conveyor belt is defined by said detector while Y coordinate is defined proceeding from conveyor belt speed. Proposed method is implemented with the help of device including X-ray-optically-connected primary radiation source, primary radiation collimator and detector. Primary X-ray source irradiates the beam with divergence not over 0.1 degree. Primary radiation source collimator is composed by the comb of material that features highly absorbing said primary X-ray radiation. Detector represents the position-sensitive detector. Additionally, proposed device comprises conveyor belt with analysed material layer fed at constant speed, primary radiation collimator and past radiation filter arranged between said collimator and position-sensitive detector.

EFFECT: higher selectivity and validity of separation, expanded range of analysed objects.

24 cl, 6 dwg