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- Title
STUDY ON THE INFLUENCE OF TEMPERATURE AND SLAG BASICITY ON THE INTERPHASE DISTRIBUTION OF CHROMIUM BY THE METHOD OF THERMODYNAMIC SIMULATION.
- Authors
Salina, Valentina; Zhuchkov, Vladimir; Zayakin, Oleg
- Abstract
The results of thermodynamic simulation of interphase distribution of chromium are presented. The chemical composition of the initial oxide system was: 25 % - 37.5 % CaO; 25 % - 12.5 % SiO2; 25 % Cr2O3; 5 % FeO; 14 % MgO; 3 % MnO; 3 % Al2O3. Silicon ferrosilicon FeSi20 (20 % Si), FeSi45 (45 % Si), FeSi65 (65 % Si) was used as a reducing agent; its consumption was 110 % of the stoichiometrically necessary for the reduction of Fe, Mn, Cr. The HSC Chemistry 6.12 software package developed by Outokumpu (Finland) was used for the simulation. The calculations were performed using the “Equilibrium Composition” module in the temperature range of 1500°C - 1700°C with a step of 50°C and the pressure of the gas phase 1 atm. It was shown that an increase in the process temperature from 1500°C to 1700°C at (CaO)/(SiO2) = 2 increases the distribution coefficient of chromium LCr, and an increase in (CaO)/(SiO2) from 1 to 3 at t = 1600оC leads to a decrease in LCr. The degree of useful use of silicon φSi and the chemical composition of the metal are determined. The results of thermodynamic simulation can be used to determine the interphase distribution of chromium in the production of stainless steel. Keywords: oxide system, ferrosilicon, reduction, interphase distribution of chromium, temperature, slag basicity, metal composition, thermodynamic simulation.
- Subjects
BASICITY; CHROMIUM; FERROSILICON; SLAG; STAINLESS steel; REDUCING agents; TEMPERATURE
- Publication
Journal of Chemical Technology & Metallurgy, 2020, Vol 55, Issue 3, p614
- ISSN
1314-7471
- Publication type
Article