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| Experimental Study on Sticking Process during Reduction of Concentrate Fines in Fluidized Bed |
| SHAO Jian-Hua Guo Zhancheng Zhi-long ZHAO Ben ZHANG |
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Abstract By the use of thermal state visualized fluidized bed, sticking process during reduction of concentrate fines has been investigated. The macrography view of fluidized bed and microcosmic changes of particles were described. It was found that different reductants leaded to unlike swelling level of batch layer. For example, swelling is about 40% if in H2-N2 mixtures, but it raise to 82% in CO-N2 mixtures. Sticking strength, in addition, between grains after defluidization related to reductant kind, and it was proved that the sticking is postponable by lessening aptly temperature of reduction and the effects of CO is more obvious than H2. It was discovered in microcosmic that these differences are connected with iron crystals morphology.
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Received: 10 March 2010
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2011, Vol. 46 
