A novel flotation technique combining carrier flotation and cavitation bubbles to enhance separation efficiency of ultra-fine particles

The effect of ultrasound on bulk and surface nanobubbles: A review of the current status

“…One of the common methods that are reported to produce bulk nanobubbles are based on hydrodynamic and acoustic cavitation [1] , [18] , [21] , [22] , [23] . Several types of generators have been developed using the principles of membrane, the venture effect, swirl liquid flow, and pressurized dissolution (see Table 1 ).…”

Effects of monovalent and divalent ions in coal gasification brine on the froth entrainment and flotation kinetics of anthracite coal

“…Single saline solutions and ultrapure water were treated in the hydrodynamic cavitation (HC) system to get stable bubbles. Two peristaltic pumps (TL00-700M), venturi tube, and 82# tube compose the HC system together with a pulp barrel, and the narrowest part is 3 mm long in the venturi, as shown in Fig 2. Detailed operating procedures for the HC system can be found in the literature (Zhou et al, 2020). The throat velocity of the venturi tube was 16.50 m/s.…”

“…To explain the experimental results of induction time theoretically, the interaction between coal and bubbles were calculated according to the DLVO theory. The van der Waals energy (EV) (Zhou et al, 2020) and double electric layer interaction energy (EE) (Yoon, 2000) were calculated using Eq. 7:…”

“…where φ1 and φ2 represent the surface potentials of spheres 1 and 2 respectively, ε0 and ε are the values of absolute permittivity in the dispersion medium (78.5F/m) and vacuum (8.84 × 10-12 F/m) (Zhou et al, 2020), respectively, κ -1 is the Debye length (the double-layer thickness) and the equation of different solutions is written in Eq. (11) (Ishikawa et al, 2005).…”

“…Experimental set-up for the flotation experiments (left: schematic diagram, right: physical photo). Adapted from the literature(Zhou et al, 2020;Bu et al, 2018) …”