METHOD OF RED MUD PROCESSING Russian patent published in 2015 - IPC C22B7/00 C22B1/24 C22B1/02 

FIELD: metallurgy.

SUBSTANCE: method of red mud processing involves red mud pelletising, drying and further two-stage high temperature baking including oxidation baking stage at 1000-1150°C in air flow and reducing baking stage. Reducing baking stage is performed with feed of adiabatic catalytic conversion products from natural gas heated by gas flow from oxidation baking aggregate, to reducing reactor. Pelletised mud is dried by contact with natural gas heated to 260-450°C. Gas flow from oxidation baking aggregate is supplied both for natural gas heating and to production and superheating of water steam fed to a mix with natural gas.

EFFECT: enhanced hydrocarbon utilisation rate, reduced coke consumption and costs.

9 cl, 1 dwg, 2 tbl, 1 ex