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Features of the scheelite interaction with hcl solutions at 400 and 500o C, 100 MPa and various f(O2) (based on experimental and calculated data)статья Исследовательская статья
- Авторы: Redkin A.F., Котова N.P.
- Журнал: Experiment in GeoSciences
- Том: 28
- Номер: 1
- Год издания: 2022
- Первая страница: 101
- Последняя страница: 104
- Аннотация: Scheelite (CaWO4) dissolves incongruently in HCl solutions in the concentration range from 0.01 to 0.316 m. In dilute solutions containing from 0.01 to 0.0316mHCl, insignificant amounts of tungsten oxides WO3 (or) WO3-x are detected in the run products. In solutions containing 0.1 to 0.316mHCl, the formation of calcium tungsten bronzes (CTB) CaxWO3 is observed, the average composition of which corresponds to the formula Ca0.07WO3. An increase in HCl concentration contributes to the WO3 yield. According to calculations, in a solution containing 0.0316mHCl, the product yield is 4.8 ± 1.1 mol%, in a solution of 0.1mHCl – 19.6 ± 6.0, and in 0.316 mHCl – 58.1 ± 15.6. An increase in temperature reduces the WO3 yield. The analysis of the existing data on the thermodynamic properties of scheelite and tungsten oxides was carried out and calculations were performed in a system simulating the dissolution of scheelite in hydrochloric acid solutions at 400 and 500o C, 100 MPa and f(O2) in the range from Co-CoO to Cu2O-CuO buffers.
- Добавил в систему: Котова Наталья Петровна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | RedKot_ExperGeos_22.pdf | 2,5 МБ | 8 ноября 2022 [nkotova] | |
| 2. | Первая страница | titul_Exp_GeoSci_2022-1.pdf | 231,4 КБ | 8 ноября 2022 [nkotova] |