Factorial Design of Selective Flotation of Chalcopyrite from Copper Sulfides
M. KOSTOVIĆ, P. LAZIĆ, D. VUČINIĆ, S. DEUŠIĆ, R. TOMANEC
Belgrade University, DuЕЎina 7, Belgrade, Serbia
Keywords: Flotation, chalcopyrite, pyrite, factorial design
Abstract
The lab tests have been carried out to examine the influence of different factors on selectivity of chalcopyrite flotation from copper sulfides with moderate content of pyrite. The authors use the factorial design of the experiments. It is studied how the grinding fineness and xanthate concentration influence flotation of chalcopyrite and pyrite at different lime-adjusted pH values of the pulp. It is found that the highest influence on copper recovery is exerted by the size of the ground ore, pH value and collector consumption. In view of the high activity of pyrite and the intergrowth of chalcopyrite and pyrite with barren rock, it is required to grind ore up to 75-80 % content of size -74 µm, while pH of the pulp is to be maintained at the level of 11 in all flotation circuits.
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