Patent ID: 6599434
Filing Date: 2003-07-29
Classification: B01D,B03B,B03D

Abstract:
A process for recovering fine coal from a slurry of raw coal comprising the steps of supplying a quantity of raw coal slurry to water only cyclones, discharging an overflow cleaned coal from said water only cyclones into a classifying cyclone sump, discharging an underflow from the water only cyclones to a column cell sump, supplying overflow materials from said water only cyclones from said classifying cyclone sump to classifying cyclones, discharging an overflow from said classifying cyclones into said column cell sump, discharging an underflow of cleaned coal from said classifying cyclones to a vibrating screen, discharging underflow from said vibrating screen to a clarifying cyclone sump, discharging overflow from said vibrating screen to a centrifuge, discharging effluent from said centrifuge to said clarifying cyclone sump, supplying material from said column cell sump to column float cells, discharging clean coal float from said column float cells to said clarifying cyclone sump, supplying material from said clarifying cyclone sump to clarifying cyclones, discharging underflow from said clarifying cyclones to said vibrating screen thereby enabling the underflow from said vibrating screen, said classifying cyclones, said clarifying cyclones and effluent from said centrifuge to return back to said clarifying cyclone sump for recirculation through the system and discharging overflow from said clarifying cyclones and the sink from said column floatation cells to waste.