首页|Recovery of fine gold loss to tailings using advanced reactor pneumatic flotation Imhoflot (TM)
Recovery of fine gold loss to tailings using advanced reactor pneumatic flotation Imhoflot (TM)
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NSTL
Elsevier
Gold concentration usually consists of gravity separation and froth flotation. However, flotation faces difficulties due to gold-bearing ores often being refractory and finely disseminated in nature. Poor recovery and low flotation kinetics of fine particles are mainly due to the low frequencies of particle-bubble collisions and an increase in entrainment of fine gangue particles decreases the grade. In this study, applications of two pilot Imhoflot (TM) G-14 (tangential feed to the separator vessel with 1.4 m diameter) cells in an open circuit demonstrated its ability to recover fines with high gold grade and achieved a high recovery of 65-68 % for the particle size fraction of -20 mu m. The gold content in the -20 mu m fraction of tailings is only about 0.36 g/t, which is lower than in the existing flotation circuit (0.47 g/t), including rougher and scavenger banks. Furthermore, bubble size measurements indicate that pneumatic Imhoflot (TM) generated very fine bubbles in a high shear environment, improving particle-bubble collision frequencies.
NSTL
Elsevier
