METHOD AND SEPARATOR FOR RECOVERING PRECIOUS METALS FROM GOLD DUST Russian patent published in 1998 - IPC

FIELD: gold-mining industry. SUBSTANCE: invention focuses on concentrating gold from placer gold dust and from old rejects of gold-mining industry and consists in that, metal concentrate is isolated from solid phase of gold-dust suspensions in centrifugal field by passing suspension through axially rotating tilted tubular pulp conduit. Metal concentrate is discharged through a part of pulp conduit most remote from the horizontal rotation axis. Recommended intensity of centrifugal field ranges from 5 to 3000 g, tubular pulp conduit rotates at angle 40-45 deg. to horizontal axis, solid to liquid phase ratio is 1:(2-4), and suspended particles are about 3 mm large. EFFECT: increased completeness of gold recovery. 10 cl, 1 dwg