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Proceedings Paper

Plant trial of a neutron inelastic scattering gauge for the online analysis of hot reduced iron ores
Author(s): Cheryl S. Lim; Brian Sowerby; S. Rainey; G. J. Hardie
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Paper Abstract

The HIsmelt Process is a direct smelting process involving a coal-injected smelting reactor with the off-gas passing through a circulating fluidised bed in which fine iron ore is pre-reduced and pre-heated. Control of the pre-reduction system would benefit from an on-line measurement of the degree of pre-reduction (PRD). However, the on-line measurements need to be made on hot ore in circumstances where access to representative sample streams is very difficult. An on-line gauge based on the measurement of neutron inelastic scatter gamma-rays has been installed and calibrated at the HIsmelt plant in Kwinana, Western Australia. The gauge uses an 241Am-Be neutron source and a BGO detector inside a water-cooled tube surrounded by hot iron ore. THe gauge monitors the iron, oxygen, carbon and silica contents of the ore based neutron inelastic scatter gamma-rays at 0.85, 6.13, 4.43 and 1.78 MeV respectively. In plant trials at HIsmelt the gauge determined iron, oxygen, carbon, silica and PRD to within 2.2 wt. percent, 0.6 wt. percent, 0.5 wt. percent, 1.0 wt. percent and 0.4 percent respectively. Potential application so this technology in other direct reduction and smelting processes will also be discussed.

Paper Details

Date Published: 27 February 1997
PDF: 4 pages
Proc. SPIE 2867, International Conference Neutrons in Research and Industry, (27 February 1997); doi: 10.1117/12.267902
Show Author Affiliations
Cheryl S. Lim, Commonwealth Scientific and Industrial Research Organization (Australia)
Brian Sowerby, Commonwealth Scientific and Industrial Research Organization (Australia)
S. Rainey, Commonwealth Scientific and Industrial Research Organization (Australia)
G. J. Hardie, HIsmelt Corp. Pty. Ltd. (Australia)

Published in SPIE Proceedings Vol. 2867:
International Conference Neutrons in Research and Industry
George Vourvopoulos, Editor(s)

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