Abstract
The paper describes the thermodynamic simulation of chemical and phase transformations in the Fe2O3–NiO–CoO–C system carried out using the Astra 4 multipurpose software package developed at the Bauman Moscow State Technical University, which was designed to simulate equilibrium states and processes in high-temperature systems with chemical and phase transformations. The study of chemical and phase transformation simulation in the system was carried out in temperature ranges of 573–1773 K and pressure ranges of 0,001–0,1 MPa. In the course of simulation it was found that iron mainly transited into Fe(k) and its transition degree (αFe) was from 28,9 % at Т = 1173 K to 99,05 % at Т = 1773 K; the value of αNi was 100 % at Т = 573÷1273 K and decreased to 99,99 % (when starting transition into the gaseous phase) when the temperature increased to 1773 K; the transition degree of cobalt (similar to nickel, it was distributed into Со(к)) was 100 % at Т = 573÷1273 K and decreased to 99,99 % (when starting transition into the gaseous phase) when the temperature increased to 1773 K.