TY - JOUR
T1 - Effect of Temperature, Time, and Cooling Rate on the Mineralogy, Morphology, and Reducibility of Iron Ore Sinter Analogues
AU - Harvey, Tobin
AU - Pownceby, Mark I.
AU - Chen, Jeff
AU - Webster, Nathan A.S.
AU - Nguyen, Thi Bang Tuyen
AU - Matthews, Leanne
AU - O’Dea, Damien
AU - Honeyands, Tom
N1 - Publisher Copyright:
© 2020, The Author(s).
PY - 2021/1
Y1 - 2021/1
N2 - Analogue sinter tablets were produced at temperatures between 1250°C and 1320°C, with a range of hold times and cooling rates. Platy silico-ferrite of calcium and aluminum (SFCA) morphology was identified in samples produced at 1250°C using reflected light microscopy; however, quantitative x-ray diffraction (XRD) identified the presence of the SFCA phase, with no SFCA-I detected. This proves that the platy SFCA morphology common in analysis by reflected light microscopy cannot be attributed to the SFCA-I mineral without further analysis. Micro-XRD and electron probe micro-analysis (EPMA) were carried out on an area of platy SFCA confirming this result. The sinter analogue tablets were reduced in a 30% CO, 70% N2 gas mixture at 900°C in a tube furnace thermo-gravimetric analyzer. The degree of reduction of the tablets in this study was found to be controlled by the porosity of the samples, rather than by the morphology or mineralogy of the bonding phase.
AB - Analogue sinter tablets were produced at temperatures between 1250°C and 1320°C, with a range of hold times and cooling rates. Platy silico-ferrite of calcium and aluminum (SFCA) morphology was identified in samples produced at 1250°C using reflected light microscopy; however, quantitative x-ray diffraction (XRD) identified the presence of the SFCA phase, with no SFCA-I detected. This proves that the platy SFCA morphology common in analysis by reflected light microscopy cannot be attributed to the SFCA-I mineral without further analysis. Micro-XRD and electron probe micro-analysis (EPMA) were carried out on an area of platy SFCA confirming this result. The sinter analogue tablets were reduced in a 30% CO, 70% N2 gas mixture at 900°C in a tube furnace thermo-gravimetric analyzer. The degree of reduction of the tablets in this study was found to be controlled by the porosity of the samples, rather than by the morphology or mineralogy of the bonding phase.
UR - http://www.scopus.com/inward/record.url?scp=85096047543&partnerID=8YFLogxK
U2 - 10.1007/s11837-020-04452-6
DO - 10.1007/s11837-020-04452-6
M3 - Article
SN - 1047-4838
VL - 73
SP - 345
EP - 355
JO - JOM
JF - JOM
IS - 1
ER -