Iron ore sinter structure development under realistic thermal conditions

Liu, Dongmei; Evans, Geoffrey; Loo, Chin Eng

Title: Iron ore sinter structure development under realistic thermal conditions
Creator: Liu, Dongmei; Evans, Geoffrey; Loo, Chin Eng
Relation: Chemical Engineering Research and Design Vol. 130, p. 129-137
Publisher Link: http://dx.doi.org/10.1016/j.cherd.2017.09.025
Publisher: Elsevier
Resource Type: journal article
Date: 2018
Description: In iron ore sintering, the bed structure transformation is caused by coalescence process occurring at flame front which determines sinter micro-structure. This study aims at how this can be affected by realistic thermal conditions. Analogue iron ore sinter mixes were sintered in an Infrared furnace and the micro-structure was studied by measuring porosity, pore size and circle factor. Pore property analysis results showed that increasing maximum temperature, lengthening holding time and slowing heating rate have led to a reduced porosity and more round pore structure. The mechanism of coalescence and densification in iron ore sintering has been explored for the purpose of understanding and quantifying how sinter micro-structure develops and is affected by flame front speed in sintering. The theoretical calculations and experimental results indicated that thermal conditions does have a large impact on micro-structure development. Finally, proposed was a reasonable diagram for micro-structure development in sinter under realistic thermal conditions.
Subject: iron ore sintering; coalescence; densification; pore properties; micro-structure development; thermal condition
Identifier: http://hdl.handle.net/1959.13/1394765
Identifier: uon:33757
Identifier: ISSN:0263-8762
Language: eng
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