발간논문

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Vol.40, No.5, 584 ~ 592, 2002
Title
Pyrometallurgy / A Kinetic Study on the Reduction Behavior of Iron Ore Fines with CO-CO2 Gas Mixtures in a Fluidized Bed
조욱제Wook Je Cho,정원섭Won Sub Chung,정우창Uoo Chang Chung,조영래Young Rae Cho,정원배Won Bae Chung
Abstract
The reduction kinetics of iron ore fines in a fluidized-bed has been extensively investigated. Iron ore fines with particle size in the range of 710 and 1000 ㎛ were reduced at 800℃ stepwisely from Fe_2O_3 to Fe_3O_4, Fe_3O_4 to Fe_(1-x)O and Fe_(1-x)O to Fe with CO-CO_2 gas mixtures in a batch-type fluidized bed. The gas flow rate used were 2.88 and 5.76Nl/min in a hot fluidization test. The measured reduction curves were compared with those calculated from the perfect mixing model and the bubble assemblage model. It was found that the perfect mixing model showed fairly good agreement at gas flow rate of 5.76Nl/min, while the bubble assemblage model at gas flow rate of 2.88Nl/min. The present study has endeavored to obtain fundamental data for effective plant operations and to provide useful parameters in a scale up plant of a fluidized-bed system.
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