Effects of surface alteration phenomena on flotability of copper minerals of Kure-Bakibaba ore

Kure-Bakibaba pyritic copper ore of Turkey is easily altered and, therefore, is not floated and separated readily from gangue minerals, in particular from pyrite. During alteration first iron sulphates are formed which have presumably depressing effects on copper minerals flotation. ion tests were carried out with additions of CaCO3, and CaO separately during grinding and with CuSO4 addition in flotation. Flotation tests with improved results were obtained.