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Study of the reaction mechanism and composition analysis of multiple-component mixed minerals DTA/T/EGD/GC on-line coupled simultaneous technique

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Abstract

An established DTA/T/EGD/GC on-line coupled simultaneous technique and relevant equipment were applied to identify the micro impurity minerals—pyrite and siderite in two kinds of dolomite in air and N2. The proportional five-component mixed minerals (siderite, kaolinite, dolomite, calcite and quartz) and the proportional six-component mixed minerals (pyrite and the above five minerals) were detected in N2 and in air/CO2 (1∶1) separately by applying DTA/EGD/GC and DTA/GC. The experimental results provide the basis for demonstration of the reaction mechanism of thermal decomposition of various gas—solid-phase minerals in N2 and air/CO2. The compositions of six-component mixed minerals can be distinguished individually from the DTA/GC curves; reliable results are obtained.

Zusammenfassung

Zur Identifizierung der Mikroverunreinigungsminerale Pyrit und Siderit in zwei Arten von Dolomit wurde in Luft und Stickstoff eine on-line gekoppelte DTA/T/EGD/GC-Simultantechnik und die relevante Ausrüstung verwendet. Die proportionalen fünfkomponentigen Mischminerale (Siderit, Kaolinit, Dolomit, Kalzit und Quarz) und die proportionalen sechskomponentigen Mischminerale (Pyrit und die obigen fünf Minerale) wurden in Stickstoff und in einem Luft/CO2 (1∶1) Gemisch jeweils separat unter Einsatz von DTA/EGD/GC und DTA/GC detektiert. Die experimentellen Versuche liefern die Grundlage für die Demonstration des Reaktionsmechanismus der thermischen Zersetzung verschiedener Gas-Feststoffphasen-Minerale in Stickstoff und in Luft/CO2. Die Zusammensetzung von sechskomponentigen Mischmineralen kann anhand der DTA/GC-Kurven individuell unterschieden werden; zuverlässige Ergebnisse wurden erhalten.

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Cai, G. Study of the reaction mechanism and composition analysis of multiple-component mixed minerals DTA/T/EGD/GC on-line coupled simultaneous technique. Journal of Thermal Analysis 45, 167–176 (1995). https://doi.org/10.1007/BF02548676

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  • DOI: https://doi.org/10.1007/BF02548676

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