FIELD: chemistry.
SUBSTANCE: method involves preparation of the wastes and their removal in a deep collector layer pre-treated with nitric acid. Wastes with fluoride-ion concentration of (0.1-0.2) g/l, acid concentration of 0.1 mol/l and content of iron (III) which provides molar ratio iron (III):fluorine (I) =1.5:1 are removed to a collector which is reused for receiving acidic wastes. Wastes with fluoride-ion concentration of 0.1 g/l, acid concentration of 0.1 mol/l and content of iron (III) which provides molar ratio iron (III):fluorine (I) =4:1 are removed to a collector which has not been used before for receiving acidic wastes.
EFFECT: when the invention is used, leaching of aluminosilicate rocks of the collector layer does not exceed the permissible level.
4 ex, 4 tbl
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Authors
Dates
2010-08-20—Published
2008-10-21—Filed