THE LABORATORY STUDIES ON NITRATE LEACHING OF CRUDE COPPER CONCENTRATE OF ZHEZKAZGAN DEPOSIT

Studies were carried out to determine the optimal parameters of the process of leaching of crude copper concentrate with a mixture of nitric acid with sodium chloride, with preliminary mechanical activation. It is established that under the conditions: the duration of mechanical activation in the attrition and flotation complex – 15 min; salt concentration is 75 g/l, the concentration of nitric acid – 170 g/l; temperature – 90 °C, duration of leaching – 1 hour and liquid-to-solid ratio = 4:1, extract in the solution was Cu – 99,0 %, Ag – 97,0 %.