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The measurement of the ignition temperatures of commercially important sulfide minerals

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Abstract

Drop tube furnaces and thermal methods of analysis are techniques used to measure the ignition behaviour of reactive minerals such as Sulfides and coals. The use of the two techniques is discussed critically, and results obtained for pyrite and pyrrhotite have been compared. The values for ignition temperature are lower when determined by thermal methods relative to a drop tube furnace. Care must be exercised when comparing results as variables associated with the mineral such as its particle size, stoichiometry, and surface area, all influence its reactivity.

Zusammenfassung

Tropfenbombenöfen und thermoanalytische Methoden sind Techniken, die bei der Messung des Entzündungsverhaltens reaktiver Substanzen wie z.B. Sulfide und Kohlen verwendet werden. Die Anwendung beider Techniken wird kritisch diskutiert und erhaltene Ergebnisse für Pyrit und Pyrrhotin miteinander verglichen. Mit thermoanalytischen Methoden erhält man niedrigere Werte für die Entzündungstemperatur als mit Tropfenbombenöfen. Beim Vergleich von Ergebnissen mu\ Vorsicht gelten, denn alle mit dem Mineral verknüpfte Parameter, wie z.B. Partikelgrö\e, Stöchiometrie, Oberflächengrö\e beeinflussen seine Reaktivität.

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Dunn, J.G., Mackey, L.C. The measurement of the ignition temperatures of commercially important sulfide minerals. Journal of Thermal Analysis 38, 487–494 (1992). https://doi.org/10.1007/BF01915513

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