V. A. Salina, V. I. Zhuchkov, O. V. Zayakin
ABSTRACT
The results of thermodynamic modeling of the process of restoring the elements of a system containing, masses, are given. %: 40 Cr2O3; 21 FeO; 15 Al2O3; 6 SiO2; 16 MgO; 2 CaO; 0.006 P2O5 with increasing CaO content to basicity 3.15. Ferrosilicone (28% Fe, 65% Si; 7% Ni) is used as a reducing agent. For the simulation, the HSC Chemistry 6.12 software package developed by Outokumpu Research Oy (Finland) was used, the database of which introduced new thermodynamic constants for the CrO compound and corrected for CaCr2O4. It has been established that an increase in the degree of chromium reduction by 32.7% (from 64 to 95.1%) occurs in the interval of increasing the basicity of slag from 0.07 to 1.86. The rational basicity of slag is 1.86–1.9. Increased consumption of reducing agent from 0.5 to 1.05mred allows to increase the degree of chromium recovery by 52.4% and reach a value of 95.1%. The chemical composition of the resulting metal, wt %: 50.4 Cr; 1.97 Si; 3.3 Ni; 0.21 Al; 0.0050 P; Fe—the rest. The simulation results can be used to calculate the process of restoring elements of chrome ore using ferrosiliconikel.
KEYWORDS
thermodynamic modeling, system, silicothermia, basicity, reducing agent consumption, reduction degree, ferrosilicochromic nickel
DOI: 10.7868/S0235010619010183