Morphology of Iron and Agglomeration Behaviour During Reduction of Iron Oxide Fines

다국어 초록 (Multilingual Abstract)

The morphology of iron and agglomeration behaviour in the reduction progress of iron oxide fi nes were investigated interms of isothermal reduction at 800 °C in an atmosphere of CO and H 2 . Agglomeration index was employed to evaluate theagglomeration behaviour during reduction. Sticking and agglomeration occurred regardless of the iron oxides and reducingatmosphere. Reduction by CO showed a higher tendency for sticking due to the formation of iron whiskers. The addition ofCaO and MgO to Fe 2 O 3 in sintering process could improve the reduction, and also decrease the sticking by forming calcio/magnesio-wustite on the surface. Iron whiskers were still formed with the addition of CaO and MgO, and the shape of whiskerswere diff erent from that of pure Fe 2 O 3 . Uniform coating layer on the surface of particles might be one of the importantfactors aff ecting the decrease in sticking between particles.

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