INVESTIGATION OF THE ENTRAINMENT OF FINE SIZED CALCITE AND CHROMITE PARTICLES BY A FLOTATION COLUMN WITH NEGATIVE BIAS REGIME

Negatively Biased Flotation Column (NBFC) is a tool, which developed for the flotation of coarse-sized ores. Unlike conventional column, in this there no froth zone and wash-water usually not used. Therefore, hydrodynamically entrainment fine-sized particles into concentrate possible, may result decrease grade or yield concentrate.
 In study, operating parameters that can affect were investigated. Calcite with 99.4% (CaCO3) chromite concentrates 54.8% (Cr2O3) used experiments. Parameters such as superficial water flowrate, particle size, air flow rate, frother dosage density As experiments, it was determined amount increased size decreased, decreased increasing rate dosage.