Open AccessThermodynamic study of reduction process of Bapy deposit iron ore concentrate by coal of Karazhyra deposit
Author(s) -
И. А. Рыбенко,
B. A. Edil’baev,
О. И. Нохрина,
И. Д. Рожихина,
Е. В. Протопопов,
И. Е. Ходосов,
V. M. Strakhov,
М. А. Голодова
Publication year - 2021
Publication title -
černaâ metallurgiâ. bûlletenʹ naučno-tehničeskoj i èkonomičeskoj informacii/černaâ metallurgiâ. bûlletenʹ naučno-tehničeskoj informacii
Language(s) - English
Resource type - Journals
eISSN - 2619-0753
pISSN - 0135-5910
DOI - 10.32339/0135-5910-2021-3-262-271
Subject(s) - iron ore , coal , ferrous , metallurgy , reduction (mathematics) , thermodynamic equilibrium , ferrous metallurgy , volume (thermodynamics) , redox , degree (music) , materials science , chemistry , process engineering , thermodynamics , engineering , mathematics , geometry , physics , organic chemistry , acoustics
In modern ferrous metallurgy, direct reduction of iron from iron ore materials is becoming increasingly common. In order to assess the feasibility of using a particular technology, it is necessary to obtain information on the reduction processes of iron oxides. Taking into consideration that experimental research is usually expensive, a computational experiment is optimal, which allows to draw conclusions about the behavior of the studied objects on the basis of modeling high-temperature processes in complex thermodynamic systems with physicochemical transformations under equilibrium and non-equilibrium conditions. As a modeling tool, the Terra software complex created at the Moscow State Technical University named after N. E. Bauman was used. As a result of thermodynamic studies boundaries of redox processes are identified and optimal temperature and consumption of reducing agent were determined, which provide maximum degree of iron reduction. The results of simulation of iron reduction process from iron ore concentrate obtained during concentration of iron ore of Bapy deposit, by coal of Karazhyra deposit (Kazakhstan) are presented. Dependencies of composition and volume of gas phase, formed as a result of volatile coal components emission in the process of heating, degree of iron reduction at various coal consumption rates on the temperature was established. It was found that the complete reduction of iron occurs at a coal consumption of 25 kg/100 kg of concentrate and a temperature of 1013 K, and the further increase in the consumption of the reducing agent leads only to a change in the ratio of CO and SO 2 in the gas phase towards a decrease in the oxidative potential and an increase in the temperature of completion of the reducing process.