Energy-efficient reduction of iron from its ores.

Autor: Nokhrina, O., Rozhikhina, I., Rybenko, I., Khodosov, I.
Zdroj: Steel in Translation; Apr2016, Vol. 46 Issue 4, p245-250, 6p
Abstrakt: Terra thermodynamic-modeling software is used to investigate the solid-phase reduction of iron, in two stages: (1) reduction in an elementary model system; (2) reduction of iron from ore by coal. In the first stage, analysis of the redox conditions in the Fe-C-O system permits determination of the boundaries of the reductive, transition, and oxidative regions and the corresponding values of the oxygen/carbon ratio. Analysis of the reducing properties of coal by calculating the equilibrium compositions in the range 373-1873 K on the basis of Terra software shows that, within that range, the gas composition is practically the same for all the types of coal considered; only the content of volatiles is different. Sharp increase in gas volume begins at 673 K and ends at 1073 K. In the second stage, thermodynamic modeling permits the determination of the optimal consumption of poorly clinkering SS coal, long-flame D coal, and 2B lignite for complete reduction of iron from ore of specified composition. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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