METHOD OF COMPLEX PROCESSING OF SPENT SOLUTIONS IN GALVANIC PROCESS Russian patent published in 2002 - IPC

FIELD: processing of galvanic process waste. SUBSTANCE: method comprises neutralization followed by isolation of solid phase in the form of metal hydroxides. Metal hydroxides are converted into oxides by heating to temperature of at least 300 C and subsequently reducing at temperature exceeding melting temperature of metals, and the resulting liquid phase is treated with freshly prepared ferric iron hydroxide or iron-iron-containing suspension, or with mixture of iron vitriol solution with hydrogen peroxide. Settled and filtered oxides are reduced at temperatures from 11260 to 2000 C in carbon atmosphere. Invention makes it possible to recycle valuable to production process. EFFECT: more efficient processing method. 3 cl