FIELD: heat-and-power engineering.
SUBSTANCE: processing consists in separation of glass microspheres from total waste mass by agitating slurry for 10-12 min while maintaining liquid-to-solids ratio between 3:1 and 5:1 followed by settling and removal of microspheres from the slurry surface. Separation of non-burned organic residues is performed after they are reduced to fragments (90% of class 0.044 mm) in flotation process, which is carried out at initial pH 7 and flotation pH 9 employing kerosene in amounts 45-70 kg/t in main flotation and 25-40 kg/t in control flotation. Flotation is followed by step-by-step magnetic separation, first in week magnetic field at 50-150 mTl and then in magnetic fields of gradually increased intensity: from 500 to 1700 mTl with steps of 200 mTl.
EFFECT: increased integrated recovery of all valuable constituents of ash-and-slack waste.
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