Abstract:The accurate phase analysis of copper in ore samples is of significant importance for formulating beneficiation and metallurgical process schemes, as well as for the comprehensive utilization of copper resources. To accurately leach and determine the composition and content of copper phases in ores, this study attempted to leach each copper phase under different conditions. The aim was to gradually determine the leaching conditions for the cupric sulfate phase, the copper (II) oxide phase, as well as the leaching and testing conditions for the copper (I) sulfide phase. The traditional methods are ineffective in leaching the various copper phases from the low copper grades and high iron content. This study investigated the analysis process of copper phases, and selected appropriate leaching solutions and conditions. After separating each phase, the inductively coupled plasma atomic emission spectrometry (ICP-OES) was used for the determination. This method showed accurate determination of the copper content of each copper phase. The sum of the copper content from each phase was close to the total copper content, with good reproducibility and high precision (RSD<1%, n=3).