高圧流動層による鉄鉱石の水素還元

概要

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The pulverized iron ore has been reduced by H_2 with a batch type fluidized bed reactor of 60 mm I.D. The reduction pressure and temperature are 5-36 kg/cm^2 and 700-900℃, respectively. On the basis of the experimental results obtained at 700℃, the effects of pressure and gas velocity on the reduction rate have been analyzed according to the bubbling bed model. In the region of the partial reduction between 0 and 70%, the experimental result can be explained well by the present analysis. The analytical results are summarized as follows : (1) When the pressure is increased at the constant gas velocity, the reduction rate increases linearly with the pressure, independently of whether the gas supply determines the over-all rate or not. (2) When the gas velocity is increased at the constant pressure, the increase proportion of the reduction rate decreases with the increase of the gas velocity. (3) When the pressure is increased at the constant gas flow rate at the standard temperature and pressure, the reduction rate increases exponentially with the pressure, but the increase of the reduction rate saturates as the gas supply approaches the rate determining stage.
社団法人日本鉄鋼協会の論文
1981-09-01