| 简介 |
FIELD : mining.
SUBSTANCE : invention relates to mining industry and can be used in recycling production wastes of mining enterprises working with tungsten-molybdenum ores containing rare and valuable metals. Method of dressing of minerals containing valuable inclusions by successive process operations, including mechanical crushing of the said material, classification of the granulated mass with extraction for subsequent processing of fine fraction particles with a size less than the established maximum limit, magnetic separation of the removed part of the granulated mass in magnetic fields of various intensity to produce intermediate products of processing, characterised by different degree of availability of magnetic properties including complete absence. Coarse fraction of mineral raw material classified after mechanical crushing is additionally crushed using the method of cavitation water hammer. Before magnetic separation the obtained additional crushed mass is mixed with previously selected fine fractions of the mechanically crushed mass, or, the above specified masses of crushed raw material are sent for magnetic separation separately. After every stage of magnetic separation it is necessary to perform gravitational separation of the obtained intermediate products to obtain at the output of each branch of the process end products with various mass density. Method is implemented on a production line containing the following components successively installed in the direction of the process : a mechanical crusher with a vibration screen and at least two magnetic separators with magnetic fields of different intensity. Line additionally contains a hydraulic cavitation crusher for not passed through the screen coarse fraction of mineral raw material, crushed by the specified mechanical crusher, and gravitational separators, every of which is installed behind one of the specified magnetic separators.
EFFECT : technical result : increased degree of extraction of metal and mineral inclusions from poor mineral ore or production wastes of mining enterprises.
8 cl, 1 dwg, 1 ex |
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