Patent ID: 6126836
Filing Date: 2000-10-03
Classification: B03D,B04B

Abstract:
A process for recovering fine particles, comprising the steps of:injecting air bubbles into a slurry of fine particles comprising particulates selected from the group consisting of minerals, metal, ore, and oil;directing said slurry and air bubbles in a downward direction while simultaneously rotating and centrifuging said slurry and air bubbles to enhance flotation and separate said slurry into a waste stream comprising non-floatable gangue material and a particulate enriched froth comprising said air bubbles carrying a substantial portion of said particulates sought to be recovered;removing said particulate enriched froth by froth flotation;discharging said waste stream; and whereinsaid directing said slurry and air bubbles in a downward direction while simultaneously rotating and centrifuging said slurry and air bubbles takes place in a centrifugal downfeeder and said slurry and said air bubbles are passed downwardly through a stationary pipe before being simultaneously rotated and centrifuged in said centrifugal downfeeder.