Patent ID: 8360246
Filing Date: 2013-01-29
Classification: B03D

Abstract:
1. A froth flotation method for extracting a valuable substance from a slurry (S) comprising a mixture of solid phase, liquid phase and the valuable substance, the method including the steps of delivering gas into the slurry (S) in a flotation vessel ( dispersing the gas bubbles into the slurry said gas bubbles capturing said valuable substance from the slurry and forming a froth phase (F) above the slurry phase said froth phase to be removed from the vessel by overflow over an overflow lip ( dispersing wash water (W) into the froth phase (F) to wash out undesirable hydrophilic fine particles entrained from the slurry phase to the froth phase, characterized by the steps of arranging an upwardly open circular trough ( arranging a stationary water pipe ( feeding fresh water (W) via the water pipe ( distributing the wash water by gravity and centrifugal force from the trough (