METHOD OF EXTRACTING USEFUL COMPONENTS BY LEACHING Russian patent published in 1997 - IPC

FIELD: mining industry. SUBSTANCE: this relates to geotechnical methods of extracting minerals. According to method, leaching solutions are delivered into preliminarily crushed rock mass, productive solution is then withdrawn and processed by changing pH and evaporation. Before processing, flow of productive solution is brought in contact with gaseous phase, and contact surface is increased as compared with contact surface at outlet from rock mass. Contact is effected with gaseous phase which is moving relative to flow of productive solution. EFFECT: high efficiency. 1 cl, 1 tbl