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 550-600°C. 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 ≤ 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
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RU2312815C2 |
THERMOHYDROMETALLURGICAL METHOD OF COMPLEX PROCESSING OF PURITIC ORE COPPER CONCENTRATE AND EXTRACTION OF NON-FERROUS AND NOBLE METALS | 2004 |
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Authors
Dates
2010-11-20—Published
2009-03-11—Filed