Thermodynamic modeling of the complex alloy melting from high-active Al-Mn-Ca-Si elements

The paper presents the results of thermodynamic modeling process smelting a complex alloy from highly active elements Al-Mn-Ca-Si. Thermodynamic was carried out using universal program for calculating multicomponent heterogeneous systems Terra, which has its own base properties individual substances. Since preliminary calculation based on standard database showed that composition products differed expected one, we took missing functions substances HSC Chemistry 5.1 database. Initial conditions melting: temperature range 700 - 2800°C, pressure 0.1 MPa. initial charge mixture consisted coal Saryadyr deposit, manganese ore Yesymzhal and lime. According to modeling, it found optimal metal yield is achieved in 1400-2000 ° C, efficiency refining steel non-metallic inclusions, most acceptable containing 20-50% silicon, 9.27% aluminum, 12-45 % manganese, 3-20% calcium, 0.01-0.5% phosphorus, 0.05-1.5% carbon 5-20% iron.