QDTA/T/EGD/GC On-Line Coupled Simultaneous Technique X. Composition Analysis of Five-Component Mixed Minerals of Siderite,Kaolinite,Dolomite,Calcite and Quartz

By applying on established DT A/T/EGD/GC on-line coupled simultaneoustechnique and relevant equipments,the trace siderite in the dolomite was identified in CO_2 andair and the purity of calcite was determined in air.The composition analysis of five-compo-nent mixed minerals of siderite,kaolinite,dolomite,calcite and quartz has been analyzed inN_2.The experimental results indicate:the mixed minerals of the dolomite/calcite(1:1)gen-erate thermal decomposition in CO_2, three endothermic effects of releasing CO_2 appear on theDTA curves,so the discrimination can be obtained by the characteristic peaks.