CO-CO₂雰囲気における固体鉄への浸炭速度

抄録

In order to construct a mathematical model of a moving bed type ironmaking process using iron scrap as the burden materials, the carburization rate from CO-CO₂ gas mixture into solid iron was studied experimentally and theoretically.
The mass change of an iron sample during carburization was measured by a thermo-balance over a temperature range of 973 to 1423K and CO concentration of 70 to 100%. In CO atmosphere, carburization rate increased significantly with temperature over 973K, however it decreased over 1273K. In CO-CO₂ atmosphere, carburization scarcely proceeded over 10% CO₂ concentration at 1273K.
The carburization rate equation was derived by considering CO dissociation and CO₂ formation as two elemental processes. Rate constants were obtained from experimental data. The rate equation obtained agreed well with experimental results.