| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to dressing of minerals and may be used for increasing dressing efficiency. Proposed method comprises bulk extraction of ferrous of nonferrous metal ores, crushing, screening to isolate lumps and fine fraction, radiometric separation for pre-concentration of lumps to isolate rich lumps to be directed to metallurgical conversion, ore product and crushed stone while fine fraction is directed to radiometric small-portion sorting to isolate ore product and sand. Ore product is ground and directed to flotation or magnetic flotation at dressing works. Concentrated product is sintered and directed to metallurgical conversion while produced depleted product is directed to tailing dump. At preliminary concentration of classified lumps of ferrous and nonferrous metal ores is carried out in appropriate device. The latter comprises lump feed assemblies, radiometric radiation source and receivers, metal amount analysis transducers, actuators of separation of lumps with preset amount of metals from final product, and separation product discharge trays. Besides it comprises housing to accommodate all its components to make a module wherein lump feed assembly is composed of grooved vibratory feeder consisting of bed and tray arranged on said bed via elastic and spring elements to vibrate thereon. It comprises the assembly to generate forced tray vibrations with automatic adjustment of its frequency to magnitude equal to that of intrinsic vibrations of said feeder with lumps placed thereon. Said assembly is connected with grooved feeder while actuators are composed of electrically driven air valves.EFFECT: higher efficiency of dressing, improved ecology.2 cl, 2 dwg |
