RED SLUDGE REPROCESSING METHOD Russian patent published in 1995 - IPC

FIELD: reprocessing of red sludges, bauxite ore upgrading wastes. SUBSTANCE: subjecting red sludges to the action of DC electric field; dividing into two parts; discharging first liquid part containing minimum amount of solid inclusions; steaming second part with increased concentration of solid phase. EFFECT: 5-35% reduction of operating costs depending on granulometric composition of hydraulic mixture solid phase. 1 tbl