PROCESSING METHOD OF SLURRIES OF GALVANIC PRODUCTIONS

摘要

FIELD: metallurgy. ^ SUBSTANCE: method involves mixing of slurries with additions, crushing, heat treatment, leaching, filtration and extraction of heavy metals from solution. Mixing is performed at crushing with method of mechanical-chemical activation with additions in the form of compounds containing chloride- or sulphate ions in ratio of chloride- or sulphate ions to sum of metals included in slurry of not less than 1:1. Heat treatment is performed at 550-600C. Further leaching of obtained sinter is performed with acid waste water of galvanic production with similar composition as to content of ions of heavy metals at pH ëñ 3. Extraction of heavy metals from obtained solution is performed with floatation at pH=8-12. ^ EFFECT: improving environmental situation owing to reducing the burning temperature, and utilisation of heavy metals for the purpose of their further use. ^ 3 tbl