FIELD: chemistry.
SUBSTANCE: method of obtaining a heterogenic soil composite from wastes of iron ore dressing (WIOD), containing iron oxides, includes processing of WIOD with hydrochloric acid. At the first stage the said processing is carried out with hydrochloric acid of a technical 30-33% concentration at 80-90°C for 2 hours with the stoichiometric ratio of components based on the content of iron-containing components in wastes, after which, at the second stage neutralisation of iron oxide, obtained at the first stage with an alkaline agent to pH=7 is realised, separation of the liquid phase is carried out after settling for 1 hour with the dehydration of the finished product to humidity, corresponding to the total moisture capacity of the product in a paste-like state.
EFFECT: increase of the specific surface, reduction of permeability.
1 tbl, 1 ex
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