METHOD FOR DEPOSITION OF HEAVY NONFERROUS METALS FROM INDUSTRIAL SOLUTIONS AND/OR WASTES Russian patent published in 2016 - IPC C02F1/62 C02F101/20 C02F103/06 C02F103/16 

FIELD: metallurgy.

SUBSTANCE: invention can be used in nonferrous metallurgy for neutralizing of acidic industrial solutions. Method involves treatment of solutions and/or wastes with complex reagent - precipitation agent, containing calcium carbonate, iron, silicon oxides and magnesium in weight ratio CaCo₃:F_AGG:SiO₂:MgO = 100:0.7-9.5:1.3-4.8:2.5-6.5, at active mixing to produce in pulp of pH 5.0-5.5, and subsequent maintenance of pulp at active mixing 0.5-2 hours, filtering and washing of precipitate. Obtained precipitate is calcined at 720-770 °C for 1-2 hours. As precipitation agent is used industrial water slurries of thermal power plants, containing calcium carbonate, iron, silicon and magnesium oxides, at reaching of their composition to the specified ratio.

EFFECT: method provides higher efficiency and cost effectiveness of treatment of industrial solutions and/or wastes, containing heavy non-ferrous metals and iron, as well as obtaining from them a compound of sediment, which is suitable for extraction of metals, and involvement of the obtained concentrates in recycling, which enables to eliminate discharge of toxic wastes into the environment.

3 cl, 5 tbl, 4 ex