Effects of Physical Properties to thermal Decomposition of Dolomites

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Kılıç Ö.

XVI BALKAN MINERAL PROCESSING CONGRESS, Belgrade, Serbia, 17 - 19 June 2015, vol.1, pp.109-114, (Full Text)

  • Publication Type: Conference Paper / Full Text
  • Volume: 1
  • City: Belgrade
  • Country: Serbia
  • Page Numbers: pp.109-114
  • Çukurova University Affiliated: Yes

Abstract

This study has examined the effects of dolomite characteristics (chemical composition and

physical properties; bulk density, porosity, water absorption rate) and calcination temperatures on the

decomposition phenomena. Chemical, physical analysis and thermogravimetry technique have been

performed in dolomite samples originating from different parts of Turkey, determining dolomite

characteristic properties and quality. Differential thermal analysis (TG-DTA) curves, between 25-

900°C, of dolomite shows endothermic peak, essentially due to decarbonation of dolomite, finishing at

800±3°C and concerning the decomposition peak are related to content of MgO ratio, impurities and

microstructure and grinding time of dolomites and ambient gas type. At the calcination experiment, it

was found that the calcination reaction begins at approximately 450°C and was completed at between

900-950°C. At temperatures higher than 950°C, recarbonisation of MgO and CaO started that

increased the sample weight.