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 µm. The gold content in the −20 µm 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.

金选矿通常包括重选和泡沫浮选。然而，由于含金矿石在自然界中通常难熔且分布细密，因此浮选面临困难。细颗粒的回收率差和浮选动力学低主要是由于颗粒-气泡碰撞频率低以及细脉石颗粒夹带的增加降低了品位。在这项研究中，两个试验性 Imhoflot ^TM G-14（直径为 1.4 m 的分离器容器的切向进料）电池在开路中的应用证明了其回收高金品位细粉的能力，并实现了 65-68  %的高回收率对于 -20 µm 的粒径分数。-20 µm 尾矿中的金含量仅为 0.36 左右 克/吨，低于现有浮选回路（0.47 克/吨），包括粗选和扫选排。此外，气泡尺寸测量表明，气动 Imhoflot ^TM在高剪切环境中产生非常细的气泡，从而提高了粒子-气泡碰撞频率。