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
| Title | Year | Author | Number |
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| METHOD FOR REDUCING EMISSION INTO AQUATIC MEDIUM OF CHEMICAL ELEMENTS FROM GALVANIC SLUDGE | 2020 |
|
RU2742757C1 |
| PROCEDURE FOR PROCESSING FINAL TAILINGS OF GALVANIC PRODUCTION | 2010 |
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| METHOD OF PRODUCING A GYPSUM BINDER FROM WASTES OF METALLURGICAL PRODUCTION | 2020 |
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| METHOD OF COMPLEX PROCESSING OF WASTEWATER GALVANIC PRODUCTION | 2018 |
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| METHOD TO PROCESS SLUDGE OF NEUTRALISATION OF ACID MINE WATERS | 2012 |
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| METHOD FOR OBTAINING BACTERICIDAL COMPOSITE COATING ON METAL PART | 2022 |
|
RU2792543C1 |
| ALUMINUM-CONTAINING RAW MATERIAL PROCESSING METHOD | 2006 |
|
RU2312815C2 |
| THERMOHYDROMETALLURGICAL METHOD OF COMPLEX PROCESSING OF PURITIC ORE COPPER CONCENTRATE AND EXTRACTION OF NON-FERROUS AND NOBLE METALS | 2004 |
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| SORBENT, METHOD FOR PREPARATION THEREOF, AND A METHOD FOR SEPARATELY RECOVERING METAL SALTS FROM WASTES | 2004 |
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RU2256496C1 |
