METHOD OF CONCENTRATING HEAVY MINERALS AND CONCENTRATOR TO THIS END Russian patent published in 2011 - IPC B03B5/32 

FIELD: process engineering.

SUBSTANCE: set of invention relates to centrifugal concentration of fine-grain materials be density and size in water and serves to separate heavy minerals from lean material grains of lower density. Proposed method consists in creating axial teeter spiral flow of incoming processed pulp inside concentrator housing, discharging continuously light minerals and concentrating heavy minerals in selected zones. Pulsating radial component of motion is imparted to mineral particles by flow generated on bowl inner lateral surface that varies radius along angular coordinate of bowl perimetre. Amplitude of said variation features alternating-sign magnitude relative to mean radius over bowl cross section. Inner lateral surface is provided with closed concentration grooves spaced apart in height for dense heavy mineral heavy grains to be retained by rotation component of spiral flow. Mineral heavy grains thus accumulated in concentration grooves are periodically discharged. Proposed concentrator comprises housing provided with closed concentration grooves spaced apart in height, taper bottom, tangential branch pipe to feed initial pulp, appliance to discharge light grains of mineral tails and branch pipe to discharge mineral concentrate heavy grains arrange at taper bottom center. Concentrator comprises vertical central pipe with closed top part whereto aforesaid tangential branch pipe is connected and tapered feed distributor arranged there under to axially displace and tightly pressed to concentrator taper bottom in operating condition. Concentrator lateral inner surface represent a bowl expanding upward. Bowl angular coordinate radius varies by periodic alternating-sign law relative to mean radius across bowl section. Appliance to discharge mineral light grains is made up of receiver for tails discharge arranged level with bowl open top edge.

EFFECT: higher efficiency of concentration.

2 cl, 2 dwg