THERMODYNAMIC DIAGRAM ANALYSIS (TDA) OF MnO-CaO-AI_2O_3-SiO, AND PHASE COMPOSITION OF SLAG IN REFINED FERROMANGANESE PRODUCTION

摘要

The research presents the calculations of the analytical expressions of the oxide system MnO-CaO-Al_2O_3-SiO_2 and the phase compositions of the slags from the production of refined ferromanganese. It is determined that the system under consideration is divided into 19 elementary quasi-systems consisting of incongruently melting and con-gruently melting compounds. The sum of the relative volumes of the elementary tetrahedron of the MnO-CaO-Al_2O_3-SiO_2 system equals one (1,000000), which confirms the accuracy of the performed calculations. Quasi-volumes in the system MnO-CaO-Al_2O_3-SiO_2, simulating the composition of the resulting slag in the process of metallother-mic recovery of manganese concentrates are found.