| Autor: |
Ultarakova, Almagul, Yessengaziyev, Azamat, Karshyga, Zaure, Naimanbayev, Madali, Kassymzhanov, Kaysar |
| Předmět: |
|
| Zdroj: |
Journal of Chemical Technology & Metallurgy; 2024, Vol. 59 Issue 5, p1051-1056, 6p |
| Abstrakt: |
The paper presents the results of processing niobium-containing fluoride cinders to obtain niobium concentrate from them. The material composition of the cinder was studied by chemical and X-ray methods. X-ray phase analysis showed the presence of ammonium aluminium fluoride, ammonium iron fluoride, ammonium titanium fluoride, as well as niobium-containing sodium niobium fluoride. Leaching of the fluoride cinder was carried out with ammonia water at temperatures of 60 - 80°C until a precipitate was formed at pH = 9 with vigorous stirring at 300 rpm, for 90 min. Nitric acid purification of the sludge was performed with a nitric acid solution within 4 - 10 %, at 60°C, with a S:L ratio of 1:5 and an agitation time of 120 min. 8 % HNO3 was chosen as the optimum concentration of nitric acid. After washing the obtained cake was calcined at 500°C for 120 min. The niobium concentrate containing 57.5 % Nb2O5 was obtained according to the study results. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
