- Title
- Behaviour of Iron Ore Granules: Laboratory and Commercial Sinter Plant Granulation
- Creator
- Aladejebi, O. A.; Mitra, S.; Singh, T.; Pinson, D. J.; Chew, S. J.; Honeyands, T.
- Relation
- Iron Ore Conference 2023. Proceedings of the Iron Ore Conference 2023 (Perth, Australia 18-20 September, 2023) p. 524-534
- Publisher
- AusIMM
- Resource Type
- conference paper
- Date
- 2023
- Description
- Currently, many commercial sinter plants are exploring the potential addition of high-grade iron ore concentrates to improve the sinter grade. A better understanding of the ore blend, granule behaviour and green bed properties is critical to making this change and maintaining productivity in the sinter plant. This study compared the performance of a laboratory scale granulation drum to commercial scale. The blend used was an Asia-Pacific style sinter blend containing iron ore concentrates. The operating conditions of the two granulation drums (laboratory and commercial scale) were fixed at the same Froude Number (0.00337), space factor (15%) and residence time (4.5 mins). The granules were characterised by measuring their mean size, size distribution and green bed voidage. It was found that the laboratory scale granules were representative of commercial sinter plant granules at similar moisture content. When the moisture was fixed at ~6.9%, granulation time had no significant effect. A further fundamental investigation was undertaken to measure the water holding capacity and intra-particle porosity of the individual ores used in this study. The kinetics of water absorption were measured which showed that water absorbs quickly into the ore particles within the first 60 seconds, slowing down until final saturation was attained after 6 hours. A linear relationship between the water holding capacity and intra-particle porosity was noted for different ore particle sizes. The results of this study provide a baseline understanding of the current commercial sinter blend and encourage exploring the specific effect of increasing the proportion of ultrafine concentrates in sintering in a future study.
- Subject
- water holding capacity; intra-particle porosity; concentrates; granules; green bed properties
- Identifier
- http://hdl.handle.net/1959.13/1493608
- Identifier
- uon:53599
- Identifier
- ISBN:9781922395177
- Language
- eng
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