METHOD FOR PROCESSING NEPHELINE Russian patent published in 1994 - IPC

FIELD: processing industrial waters. SUBSTANCE: soda pulp prepared after carbonization of return industrial waters is condensed. Thus prepared alumo-containing slime is filtered. Filtrate is fed for evaporation and slime having humidity not more 30% is repulped by caustic solution having content of caustic alkali 100-120 g/l. Thus prepared pulp is filtered to prepare belite slime having humidity not more 30% and aluminate solution having content of aluminium oxide 80-11 g/l. Belite slime is repulped by industrial; waters and is fed to prepare charge for caking, aluminate solution is decomposed till aluminium oxide content in liquid phase is 20-25 g/l. Caustic solution is separated of thus prepared pulp by filtration and is fed for repulping alumo-containing slime. Hydrate pulp having humidity to 30% is washed by condensate of evaporation of soda solution and is fed to produce production hydrate, industrial waters being used for repulping slime. EFFECT: improves efficiency of the method. 2 cl, 1 dwg, 1 tbl