COMPLEX FOR ASH WASTES PROCESSING Russian patent published in 2021 - IPC B09B3/00 C01F1/00 

FIELD: technological processes.

SUBSTANCE: invention relates to processing technogenic deposits from coal combustion and can be used for production of silicon and aluminum compounds. System for processing of ash dumps includes serially interconnected raw material preparation equipment, equipment for its thermal treatment and equipment for chemical treatment. Equipment for raw material preparation includes in-series connected mixer, granulator and batcher. Heat treatment equipment represents a tubular rotary sintering furnace and a drum refrigerator. Chemical treatment equipment includes a loading hopper, a mill, the first propeller mixer, the first filtering system and parallel first and second lines. At that, the first line includes the second propeller mixer with carbon dioxide gas supply, second filter system with parallel drying chamber and third propeller mixer with lime supply connected to third filtration system connected to mixer, as well as with a roasting furnace connected to the third propeller mixer and the second propeller mixer. Second line includes the fourth propeller mixer with sulfuric acid supply, the fourth filtration system, the fifth propeller mixer with caustic alkali supply connected with the second propeller mixer.

EFFECT: invention enables to obtain white soot and a product containing alumina.

1 cl, 1 dwg