FIELD: complex processing of bauxites. SUBSTANCE: method involves treating red sludge by 3-5% chlorohydric acid at room temperature with solid-liquid ratio within the range of 1:5 10; treating it with 50-55% sulfuric acid at 100-110 with solid-liquid ratio within the range of 1:6-8. EFFECT: increased efficiency in extracting of useful components from red sludge of alumina production. 2 tbl
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