Abstract:
Copper which has many benefits in everyday life makes people look for several methods to extract copper in accordance with the intent and purpose of its use, the purpose of this test is to determine the % recovery value of the ore characteristic of massive silica by using fine ore leaching and considering the variation of the ore fraction used. In determining the % recovery of the ore to be tested, the sizes are 100#, 150# and 200#
with a NaCN concentration of 500 ppm. Apart from the ore fraction and NaCN concentration, the leaching time will also be determined for 48 hours using a PBRT (Pulverized Bottle Roll Test). Samples taken are in the form of a solution which will be analyzed for Cu levels using an AAS (Atomic Absorption Spectrometer). Based on the results obtained in this test when viewed from the time used in sampling, the optimum % recovery is obtained at 24 – 48 hours when viewed from the ore fraction parameters used in this test, for Massive Silica rocks the highest % copper recovery is 54.1% with leaching time of 48 hours at 100# fraction and 500 ppm NaCN concentration.
