期刊
POWDER TECHNOLOGY
卷 149, 期 1, 页码 1-9出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.powtec.2004.09.040
关键词
gas-powder flow; powder accumulation; packed beds; blast furnace; physical modelling
Gas powder flow in a slot type packed bed is experimentally studied in order to understand the flow and accumulation behaviour of powder in systems like an ironmaking blast furnace (BF). A variety of variables including gas flow rate, powder flow rate and packing properties are considered. It is found that a clear and stable accumulation region, in which the voids among packed particles are fully filled with powder, can form in the low gas-powder velocity zone at the bottom of the bed. The accumulation region is stable and shows strong hysteresis. The distribution of softening-melting layers in the blast furnace known as the cohesive zone (CZ) is modelled by inserting solid blocks into the bed. The results indicate that the inverse-V cohesive zone shape leads to low powder accumulation within the CZ and at the corner of the bed. (C) 2004 Elsevier B.V. All rights reserved.
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