通过热力学多因素耦合控制氧化铁碳热还原顺序

Controlling the Carbothermic Reduction Sequence of Ferric Oxide through Thermodynamic Multifactor Coupling

鉴于实现氧化铁按Fe2O3→Fe3O4→Fe顺序碳热还原的重要实际意义,提出了将碳储能、总压和惰气分压这几个热力学因素进行耦合的新思想,并导出了使这些热力学因素得以耦合的定量关系式。此外,从节能的角度出发,还研究了如何在使上述热力学因素满足耦合定量关系式的同时尽量降低碳储能。结果表明,在惰气分压(或总压)一定的前提下,通过在一定范围内调节总压(或惰气分压),可使所需碳储能得以降低,甚至可降至零。

In view of the significance of realizing the carbothermic reduction sequence of Fe2O3→Fe3O4→Fe for fer- ric oxide, the thermodynamic multifactor coupling including stored energy, total pressure, partial pressure of inert gas as a new thought were put forward, and the quantitative relation satisfied by the thermodynamic parameters as an indication of multifactor coupling was deduced. Furthermore, how to decrease the stored energy for carbon on the basis of the quantita- tive relation for energy conservation was discussed from the view of energy saving. The results show that on the premise that the partial pressure of inert gas （ or total pressure） is fixed, stored energy for carbon required for realizing the above se- quence can be decreased even to zero by regulating the value of total pressure（ or partial pressure of inert gas） within cer- tain range.