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In situ diffraction studies of iron ore sinter bonding phase formation: QPA considerations and pushing the limits of laboratory data collection

Published online by Cambridge University Press:  17 November 2014

Nathan A. S. Webster ,
Mark I. Pownceby ,
Ian C. Madsen ,
Andrew J. Studer  and
Justin A. Kimpton
Nathan A. S. Webster*
Affiliation:
CSIRO Mineral Resources Flagship, Private Bag 10, Clayton South, VIC 3169, Australia Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
Mark I. Pownceby
Affiliation:
CSIRO Mineral Resources Flagship, Private Bag 10, Clayton South, VIC 3169, Australia
Ian C. Madsen
Affiliation:
CSIRO Mineral Resources Flagship, Private Bag 10, Clayton South, VIC 3169, Australia
Andrew J. Studer
Affiliation:
Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW 2232, Australia
Justin A. Kimpton
Affiliation:
Australian Synchrotron, 800 Blackburn Road, Clayton, VIC 3168, Australia
*
a)Author to whom correspondence should be addressed. Electronic mail: [email protected]
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Abstract

The formation and decomposition of silico-ferrite of calcium and aluminium (SFCA) and SFCA-I iron ore sinter bonding phases have been investigated using in situ synchrotron and laboratory X-ray diffraction (XRD) and neutron diffraction (ND). An external standard approach for determining absolute phase concentrations via Rietveld refinement-based quantitative phase analysis is discussed. The complementarity of in situ XRD and ND in characterising sinter phase formation and decomposition is also shown, with the volume diffraction afforded by the neutron technique reducing errors in the quantification of magnetite above ~1200 °C. Finally, by collecting 6 s laboratory XRD datasets and using a heating rate of 175 °C min−1, phase formation and decomposition have been monitored under heating rates more closely approximating those encountered in industrial iron ore sintering.

Keywords

iron-ore sinterSFCA and SFCA-I bonding phasesin situ laboratory and synchrotron X-ray diffractionin situ neutron diffractionRietveld-based quantitative phase analysis
Type
Technical Articles
Information
Powder Diffraction , Volume 29 , Issue S1 , December 2014 , pp. S54 - S58
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Copyright
Copyright © International Centre for Diffraction Data 2014 

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