Calculations and analysis of eutectics temperatures and compositions of multi-component sections of the MgO—Al2O3—FeO—TiO2 system

Abstract

Thermal insulation and safety of cement rotary kilns is ensured by the use of modern and reliable refractory materials with a set of specified performance characteristics. The MgO—Al2O3—FeO—ТіО2 system is a physicochemical basis for the development of compositions of periclase-spinel refractories for lining rotary kilns of cement production. Since periclase-spinel refractories obtained on the basis of the MgO— Al2O3—FeO—ТіО2 system are operated at elevated temperatures, in this article, the calculations of temperatures and compositions of eutectics of binary, triple and quadruple sections of the system are carried out in order to predict the appearance of a melt in the corresponding materials, and to develop technological solutions for a rational amount of melt during sintering and as a seed for a set of coatings. Analysis of temperatures and compositions of eutectics of multicomponent sections MgO—FeO—Mg2TiO4—MgAl2O4, FeAl2O4—Mg2TiO4—FeO—Fe2TiO4, FeAl2O4—Mg2TiO4—MgAl2O4—FeO and FeAl2O4—MgTiO3—MgAl2O4—Al2O3 systems MgO—Al2O3—FeO—ТіО2 confirms the possibility of synthesis of periclase-spinel refractories with high performance in this system and provides the necessary technological information for targeted control of the relationship “composition—structure—properties” during their production.