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| Experiment study of Ore/coal Composite Pellet Compacted by BF Flue Dust |
| Jeery Guo |
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Abstract Abstract: Direct reduced experiments were carried out by using ore/coal composite pellets which were compacted by BF flue dust and mill scale. The effects of different reduced atmospheres, different C/O in pellets, reduced time and temperature to the reduction results were researched. The results shown high metallization degree was gained by reduced the ore/coal composite pellets under high temperature in the air. Metallization degree increased steadily with reduced time when the C/O in pellet is more than 1.2. And it reached 96.94% after reduced 30 minutes under 1350℃. The trend of metallization degree change suggested the reaction in pellet was first controlled by chemical reaction, and then it gradually changed to diffusion control. Iron reduced from pellet separated from slag when ore/coal composite pellet reacted for 30minutes under 1400℃ in the air.
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Received: 12 August 2009
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2010, Vol. 45 
