Differential thermal analysis of Kharidhunga magnesite

Abstract

The DTA curves of seven representative samples from the Kharidhunga Magnesite Deposit arc asymmetric and show a sharp rise after attaining the maxima between 670 and 700 ^oC, which indicates the siliceous nature of the magnesite. The overlapped endothermic peaks al 770 ^oC and 860 ^oC characterize the presence of calcite and dolomite respectively as the other impurities. The results of DTA and TG are also compared with the available data of chemical analysis.