Mechanism and Kinetics of the Thermal Oxidation of Natural Sphalerite
- Авторлар: Gulyaeva R.1, Selivanov E.1, Pikalov S.1
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Мекемелер:
- Institute of Metallurgy, Ural Branch
- Шығарылым: Том 2018, № 3 (2018)
- Беттер: 221-227
- Бөлім: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/172400
- DOI: https://doi.org/10.1134/S0036029518030047
- ID: 172400
Дәйексөз келтіру
Аннотация
The oxidation of natural sphalerite on heating in an oxidative medium is studied by thermogravimetry coupled with scanning calorimetry, mass spectrometry of released gases, and X-ray powder diffraction analysis. The mechanism of sphalerite oxidation when the particle surface is equally accessible and sulfur dioxide is removed from the reaction zone is the formation of ZnO, ZnFe2O4, and SO2. The process is found to be one-stage, as determined by a nonisothermal kinetic method. The activation energies are from 293 to 317 kJ/mol depending on the model used. Natural sphalerite is oxidized in the kinetic regime, and the rate-determining steps are the formation and growth of new-phase nuclei.
Негізгі сөздер
Авторлар туралы
R. Gulyaeva
Institute of Metallurgy, Ural Branch
Хат алмасуға жауапты Автор.
Email: pcmlab@mail.ru
Ресей, ul. Amundsena 101, Yekaterinburg, 620016
E. Selivanov
Institute of Metallurgy, Ural Branch
Email: pcmlab@mail.ru
Ресей, ul. Amundsena 101, Yekaterinburg, 620016
S. Pikalov
Institute of Metallurgy, Ural Branch
Email: pcmlab@mail.ru
Ресей, ul. Amundsena 101, Yekaterinburg, 620016
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