鼓胴型回転流動層による粉鉱の向流還元(<特集>製銑)

概要

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In order to increase the gas utilization coefficient and to prohibit the sintering phenomena in fluidized bed, the experiments of the countercurrent reduction of powder ore with CO gas in a drum-type rotary fluidized bed at the temperature of 900℃ and 750℃ were carried out. In a modelling vessel (diameter : 30cm), the rotary fluidized state could be obtained on the conditions that the filling ratio of powder ore was in the range of 30 to 50% and the dimensionless rotary speed (F) was 1.0 to 1.2. The motion of powder ore in the drum-type rotary fluidized bed was seemed to be a completely mixing state. The gas utilization coefficient was maximum under the condition that F was 1.0, and it could be increased up to the stoichiometric equilibrium concentration for the reduction of ore. The results of a mathematical calculation on dimensionless numbers (Gc and Ot) for countercurrent reduction based on the three-interface model were in good agreement with observed data.
社団法人日本鉄鋼協会の論文
1980-11-01