FIELD: complex processing of bauxite, recovery of valuable components from red sludge of alumina preparation. SUBSTANCE: method of processing of red sludge of alumina preparation includes its digesting with sulfuric acid with conversion of valuable components into solution. Leaching with sulfuric acid having concentration 74.0-100.0 g/l is conducted at temperature not below 642 C to win simultaneously sufficiently high extraction of scandium and yttrium from sludge, to decrease considerably amount of iron transferred into solution enriched with valuable components which facilitates its further processing. Precipitate obtained after separation of solution, enriched with iron can be used in metallurgy. EFFECT: usage of technological low concentration sulfuric acid for processing. 1 tbl
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