Abstract
In this article given physical properties of liquid slag, their influence on the basic parameters of technological processes in Almalyk mining and metallurgical plant. The physical properties of melts directly affect the main parameters of pyrometallurgical processes, as well as the design and operation features of equipment. The physical properties of melts (F) are functions of the composition of the phase under study (Xij) and external parameters that determine the state of the system. These properties reflect the structure of the melt, i.e., they are structure-sensitive properties. The physical properties of the liquid phase should also be understood as its properties that are not associated with changes in its material composition or chemical properties, or are associated to an insignificant extent.