METHOD OF EXTRACTING MINERALS BY MEANS OF LEACHING Russian patent published in 1997 - IPC

FIELD: mining industry. SUBSTANCE: method includes breaking, grinding, and leaching material in charge-exchange apparatuses, and sorption and cementation deposition from productive solutions. Leaching and depositing mineral is carried out under excessive pressure by alternating static and dynamic conditions. Productive solution is withdrawn into bulk solution by way of pressure volume displacement and replacement of fluidized solid material by solvent from one of charge-exchange apparatuses into another. Leaching, washing, and neutralization processes are carried out successively and circulation-vise throughout closed circuit between two charge-exchange apparatuses, carrying working liquid agent being successively replaced. Leaching is carried out when charging the first apparatus of leaching cycle by way of ejecting with reagent jet by-gravity fed mixture of air and ore material. Leaching, washing, and neutralization processes are carried out in material pressure fluidization mode in full apparatus space using twisted jets of liquid agent in the zone of material pressure displacement into adjacent apparatus. Displacement of material from apparatus after last circulation cycle is performed by water followed by hydraulically transporting leached and neutralized material. Sorption, desorption, cementation, and neutralization are carried out consecutively and as interconnected processes in controlled pressure sorbent-fluidization mode in full volume of apparatus and system of circulation hydraulic transportation in closed circuit between two charge-exchange apparatuses with successively replacing carrying working liquid agent. Sorption begins with charging the first apparatus by way of ejecting with productive solution jet by-gravity fed mixture of air and sorbent. EFFECT: enhanced efficiency of process. 7 cl, 1 dwg