FIELD: metallurgy.
SUBSTANCE: invention can be used for processing of the carbon containing materials. The method contains loading of the spent cathode baths for aluminium production in the shaft furnace (1), where they are heat treated at temperature exceeding temperature of carbon ignition and evaporation temperature of toxic substance containing in spent cathode baths. At first longitudinal section (8) of the shaft furnace (1) the reaction gases are directed at straight flow with carbon, and at second longitudinal section (9) of the shaft furnace at opposite flow with carbon. The reaction gases are removed (11) from the shaft furnace in area with increased cross-section (7) between the said longitudinal sections (8, 9).
EFFECT: invention ensures complete separation of the toxic substances, such as sodium and fluorine, and simultaneous production of slag enriched with calcium aluminate, prevention of alkali recirculation.
19 cl, 9 dwg
