Vanadium Recovery from the Waste Sludge of the Lime–Sulfuric Acid Processing of Converter Slag
| Autor: | T. V. Olyunina, G. B. Sadykhov, D. Yu. Kashenkov, K. V. Goncharov |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
020502 materials Inorganic chemistry Metals and Alloys chemistry.chemical_element Vanadium Sulfuric acid 02 engineering and technology Manganese engineering.material chemistry.chemical_compound 0205 materials engineering chemistry engineering Pentoxide Ammonium Vanadate Leaching (metallurgy) Lime |
| Zdroj: | Russian Metallurgy (Metally). 2020:709-717 |
| ISSN: | 1555-6255 0036-0295 |
| DOI: | 10.1134/s0036029520070125 |
| Popis: | The results of studying the vanadium recovery from the waste sludge of the manufacture of vanadium pentoxide V2O5 using the lime–sulfuric acid technology are discussed. Vanadium mainly exists in the sludge in three following forms: acid-soluble as manganese vanadate, unrecoverable in calcium silicates, and unrecovered as incompletely oxidized vanadium spinelides in the coarse fraction of the sludge. Low-temperature (20–40°C) sulfuric acid leaching of the sludge for complete recovery of acid-soluble vanadium, which is achieved at pH 0.75–0.8, is studied. Various variants of vanadium precipitation from a sulfuric acid solution are examined. The preliminary purification of the solution from impurities makes it possible to produce pure (≥99.4%) vanadium pentoxide during the precipitation of vanadium in the form of ammonium polyvanadate. |
| Databáze: | OpenAIRE |
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