Laboratory experiments on the production and characterisation of iron ore pellets
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(Published version)
Date
2018
Authors
Quast, K.
Skinner, W.
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Conference paper
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Proceedings of Chemeca 2018, 2018, iss.121, pp.1-12
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Chemeca 2018 (30 Sep 2018 - 3 Oct 2018 : Queenstown, New Zealand)
Abstract
All Iron ore pellets are formed from beneficiated or run of mine iron ore fines. The ore is usually finely ground and mixed with fluxes and binding agents prior to the formation of pellets using either discs or drums. Surface tension of water and gravitational forces create pressure on the particles so that they coalesce together and form nuclei. These nuclei act as seeds and additional dry feed and water cause the seeds to grow into agglomerates called pellets. The resultant pellets are then fired prior to feeding to a blast furnace. The pellets must be able to withstand handling, and the standard tests which include drop and compression tests as well as resistance to thermal shock. In this paper, the parameters involved with the production of green (unfired) pellets using a pelletising disc, their mechanical properties and resistance to thermal shock is discussed in relation to their diameter and firing temperature. The pellets were produced from a local hematite ore with bentonite as the binder.
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Copyright 2018 Institution of Chemical Engineers