15th Conference on Environment and Mineral Processing Part I, Technical University of Ostrava Faculty of Mining and Geology Institute of Environmental Engineering, , Ostrava, Czech Republic, 8 - 10 June 2011, pp.67-76
Column flotation has been commercially used in mineral processing technology since the last decade. Better hydrodynamic conditions and froth washing mechanisms that exist in the flotation column can enhance mass recovery. In this study, the effect of column cross-section on the column flotation performance has been investigated. The maximum recovery was calculated for both tubular and rectangular column cross-section by using talc mineral. In order to obtain best results, operation parameters have been optimized. The results showed that tubular cross-section gave better recovery during column flotation. On the other hand, rectangular cross-section had negative effect on the flotation behavior of the talc mineral studied. It was due to the no-slip condition, the particles in the layer in contact with the surface of the column come to a complete stop. This layer also causes the particles in the adjacent layers to slow down gradually as a result of friction. Consequently, the floatability was significantly affected by the shape of the column cross section. Optimum results were obtained when using the cylindrical column cross-section. A concentrate containing 32.17% MgO, 59.69% SiO2 and 0.68% CaO was produced with a MgO recovery of 84.67% at this concentration.