Hindered flotation functions from nuclear magnetic resonance imaging

In batch settling or flotation the velocity of the disperse phase u d =U S G(φ). U S is the terminal velocity of an isolated particle, and G is the hindrance function. Vertical profiles of the fluid fraction in batch flotation experiments, measured by one-dimensional nuclear magnetic resonance (NMR) imaging, were input into a new method for extracting G. This simple, explicit calculation was tested on concentrated monodisperse and polydisperse samples. In a single experiment on a 44 mL sample of monodisperse suspension with overall solid fraction φ i =0.2, the hindered flotation function G(φ) was measured over the range of 0.05