METHOD OF HEAP LEACHING OF ORES

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FIELD : extraction of non-ferrous, rare-earth, radiactive and noble metals by spraying ore stack with leaching solutions. SUBSTANCE : proposed method includes crushing and nodulizing of ore, filling of stack and spraying of ore stack with leaching solution. After crushing, ore is divided into fractions and filling of stack is performed with layers which are homogeneous in fractions at reduction of size or ore from lower layer to upper one. Besides that, filling the ore stack is performed from center to side surfaces of stack by layers at separation of layers with perforated polymer film. Wide part of stack is oriented to South. Spraying the ore stack with leaching solution is performed under water- and solution-tight light-transmitting film; in winter seasons artificial heat insulator is placed over film. EFFECT : enhanced efficiency of leaching due to increased rate of leaching and reduction of negative effect of sedimentation in ore stack; reduced effluents of toxic agents. 3 cl, 2 dwg