Production of Iron Carbide in CH4-H2 Mixtures
Hiroshi NAKAGAWA, Takeaki MURAYAMA, Yoichi ONO
In order to investigate the optimum operating conditions for the Fe3C production from iron ore particles in CH4-H2mixtures, experiments were carried out in a fixed bed or a fluidized bed in a flow of 3.33×10-5m3/s of CH4-H2 mixtures and temperature range from 650 to 950°C.
The present study has revealed the most appropriate conditions that ratio of CH4 to H2 is 40/60 and temperature is 750°C. Under these experimental conditions most of the reduced iron was converted into Fe3C for about 30 minutes. But during reaction, a part of the Fe3C was decomposed into Fe and C, although Fe3C formed at 750°C was hard to decompose in comparison with those formed at other temperatures.
During reaction, if unreduced FeO remained in iron ore it may accelerate the decomposition of Fe3C. Therefore, porous iron ore is better to produce Fe3C than dense iron ore because of high reducibility of porous iron ore.
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