https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:13556 Sat 24 Mar 2018 08:17:06 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20503 2h. A product grade of 75% was achieved from a feed with a grade of only 0.53%, corresponding to an upgrade of 142. Here, the recovery of the cenospheres was 41%. By increasing the overflow product rate, a significantly higher recovery of 64% was achieved, but at a much lower upgrade of 33. In both cases most of the losses were attributed to fine cenosphere particles, less than 50 μmm, being entrained to the underflow.]]> Sat 24 Mar 2018 07:59:03 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28936 Sat 24 Mar 2018 07:31:27 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28229 Sat 24 Mar 2018 07:28:39 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:27713 -3 and 2.0x10^-5 N. The strength of the hydrophobic force between the particles in the second set and the bubble was then decreased by a maximum of 5 orders of magnitude with respect to the values in the first set. The results show that the total number of collected particles was larger for the top distribution than for the spherical one. This was due to the favouring action of gravity which pulled the particles towards the bubble in the former case and away from it in the latter case. In addition, in order to recover only particles from the first set while leaving the other particles in the bulk a reduction of the hydrophobic force strength of around 50 times was needed. It is intended that a further sophistication of this model by including fluid flow around the bubble would provide a useful tool to investigate the selective capture of particles in froth flotation.]]> Sat 24 Mar 2018 07:24:38 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28775 Sat 24 Mar 2018 07:23:45 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28773 b = 6j_g/D_b. However, for a given bubble diameter, D_b, the imposed gas flux, j_g, is constrained in conventional flotation by the need to operate with a distinct froth and bubbly-pulp zone to ensure effective separation. An excessive j_g will result in flooding and ineffective separation as the overflow begins to resemble the underflow. The bubble surface flux, S_b, is limited to 30 to 60 s^-1 in conventional flotation [1]. This study is concerned with enhancing the kinetics of flotation by accommodating extreme feed and gas fluxes. Extreme bubble surface fluxes, up to 600 s^-1, were produced. This was achieved by incorporating an arrangement of parallel inclined channels below the main vertical chamber. This novel arrangement enhanced the bubble-liquid segregation, preventing the entrainment of bubbles to the underflow.]]> Sat 24 Mar 2018 07:23:45 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28774 Sat 24 Mar 2018 07:23:45 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:23747 Sat 24 Mar 2018 07:16:57 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:23451 Sat 24 Mar 2018 07:13:02 AEDT ]]>