METHOD OF DRESSING GOLD-CONTAINING ROCK-ORE MATERIAL Russian patent published in 1998 - IPC

FIELD: mineral dressing. SUBSTANCE: invention relates to gravity dressing of gold-containing material. invention consists in that, before reject material is stored in pile, storage area is provided with water-impermeable base and borders. After several reject freezing- thawing cycles, pile is opened and its lower productive layer is subjected to concentration. To speed up gold concentration process in the lower layer, pile in thawing period is repeatedly filled with water and dried through specially executed canals in lower, in the drop line direction, border. Gold concentration is additionally accelerated by vertical impact loading on the reject pile. EFFECT: reduced metal loss die to reconcentration. 6 cl