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Keywords = partially reduced iron (PRI)

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13 pages, 8921 KB  
Article
Investigation on the Reaction Behaviour of Partially Reduced Iron under Blast Furnace Conditions
by Gi-Ho La, Joon-Sung Choi and Dong-Joon Min
Metals 2021, 11(5), 839; https://doi.org/10.3390/met11050839 - 20 May 2021
Cited by 11 | Viewed by 3208
Abstract
The reaction behaviour of partially reduced iron (PRI) was studied to understand the effect of PRI utilisation in the blast furnace process. For quantitative analysis, the reaction behaviour of PRI under typical operating conditions of a blast furnace was measured using the thermogravimetric [...] Read more.
The reaction behaviour of partially reduced iron (PRI) was studied to understand the effect of PRI utilisation in the blast furnace process. For quantitative analysis, the reaction behaviour of PRI under typical operating conditions of a blast furnace was measured using the thermogravimetric method along with the reduction behaviour of hematite and sinter. Experimental results indicated that the reoxidation behaviour of the PRI under the conditions of the upper shaft of the blast furnace retarded the indirect reduction rate in the lower shaft. The rate constants derived from the grain model, experimental results of scanning electron microscopy, and porosimetry analysis indicated that the phenomenon of reduction retardation of PRI under the conditions of the lower shaft originated owing to the reoxidation of PRI, resulting in the blockage of pores. The reaction behaviour considering the reaction characteristics of PRI was derived under conventional blast furnace conditions. Full article
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