Leaching method of sulfide ore containing chalcopyrite

摘要

PROBLEM TO BE SOLVED: To provide a method for leaching a sulfide ore containing copper pyrite, in which the sulfide ore containing copper pyrite is chemically leached in versatile conditions in a practical operation level. SOLUTION: The method for leaching the sulfide ore containing copper pyrite by using sulfuric acid, comprises measuring a period for a potential of the pulp to reach 400 mV when measured with a saturated calomel electrode, and a leaching rate of copper, beforehand, charging a raw material containing a copper quantity leachable by the time when the electric potential calculated from the period and the leaching rate reaches 400 mV, and leaching it.