Abstract
	The focus of the presented thesis is the study of some of the physical - chemical properties of metallurgical slags. A real slag system was investigated, which serves as a basis of the raffinate slags used for processing on the ladle furnaces. Dominant components of this system are CaO, MgO, and Al2O3, except from these it contains a range of additional chemical admixtures, e.g. Fe2O3, TiO2, K2O, SiO2 and other. As rating criteron of this system it was chosen the surface tension in dependence on the temperature and chemical composition which changed during gradual increasing of CaO preserving the proportion of the other compounds. Because of the assessment of the minority compounds influence on the surface tension, by analogical way there were produced series of other synthetic samples which contained appropriate proportions of majority compounds only. At these samples of the real and also synthetic slag systems which were prepared in this way, there was measured by the method of a lying drop the surface tension in dependence on the temperature. As completion data there was observed the density temperature dependence at these systems. The obtained results are interpretted on the basis of realized rtg - phase analyses of chosen samples.