Abstract
Maximum rates of weight loss were measured during thermal analysis experiments involving the oxidation of thin layers of pyrite particles (<37 to 212–300 μm screen size fractions) in oxygen-containing atmospheres (10–100%). The experimentally determined rates were compared with those calculated for several diffusion-based models. Good agreement was obtained with the model involving gas diffusion in the crucible.
Zusammenfassung
Maximale Geschwindigkeiten des bei der Oxydation von in dünnen Schichten aufgebrachten Pyritteilchen (< 37 bis 212–300 μm Teilchengröße) in 10–100 Sauerstoff enthaltenden Atmosphären auftretenden Gewichtsverlustes wurden im Verlaufe von thermoanalytischen Experimenten gemessen. Die erhaltenen Werte werden mit denen für einige, die Diffusion berücksichtigenden Modelle berechneten verglichen. Gute Übereinstimmung wurde bei dem die Gasdiffusion im Tiegel berücksichtigenden Modell erhalten.
Резюме
Измерены максимальн ые скорости потери ве са при термическом анал изе процесса окисления тонких сло ев частиц пирита с раз мером от 37 до 212–300 μм в атмосфере с содержанием кислоро да от 10 до 100%. Эксперимент ально найденные скорости б ыли сопоставлены с вычисленными на осн ове некоторых диффуз ионных моделей. Хорошее совп адение было получено для модели, в ключающей диффузию г аза в тигель.
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Jorgensen, F.R.A., Moyle, F.J. Gas diffusion during the thermal analysis of pyrite. Journal of Thermal Analysis 31, 145–156 (1986). https://doi.org/10.1007/BF01913895
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DOI: https://doi.org/10.1007/BF01913895