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This paper presents results of researches conducted to determine the influence of pulverous solid additives at the combustion of coal dust blown into the furnace by means of derivatographic thermal analysis. Methods that gave the best results in solids research, especially in mineralogy but and other areas such as solid fuels research and their gasification processes are: differential thermal analysis, thermal gravimetry and derivative thermal gravimetry .These methods are applied separate or unitary with equipment developed by MOM - Budapest, Mettler, Switzerland etc. The temperature (T), mass change (TG), mass change rate (DTG) and enthalpy change (DTE) of a single test are simultaneously measured and it is realized, a complete characterization in terms thermograph investigated substance. [ABSTRACT FROM AUTHOR]

The purpose of the present paper was to obtain special fire brik products for the metalurgic industry, through a forming and casting method without using clay binder. The laboratory trials have led to finding some compositions used to fire brik products of superior quality from superaluminum chamotte (with over 85 % Al2O3) and tabular alumina (with about 98,5 % Al2O3). [ABSTRACT FROM AUTHOR]