Degradation of MgO in alumina-containing slags

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/220481

Title: Degradation of MgO in alumina-containing slags
Author(s): Tran, T.; Nightingale, S.; Brooks, Geoffrey
Abstract: MgO crucibles were attacked by synthetic Al203-containing slags at 1500 degrees Celsius in air for various periods from 15 minutes to 8 hours using the drop quench technique. For samples attacked for 2 hours or more, clusters of newly-fanned crystals containing Mg, Fe and AI, presumably spinel, were observed to be separated from the magnesia by a melt region of relatively constant thickness of about 150-200 μm. The separation of the spinel crystals and the magnesia is in broad agreement with previous work by Rait under similar experimental conditions. Examination of samples attacked for shorter times suggests that the crystals initially formed on the MgO surface. Clusters of these crystals appear to have subsequently detached along the MgO / crystals interface and moved to a constant distance in the melt region.
Publication type: Conference paper
Source: Proceedings of 'Materials 98', the Biennial Conference of the Institute of Materials Engineering Australasia Ltd, Wollongong, New South Wales, Australia, 06-08 July 1998 / Michael Ferry (ed.), pp. 675-680
Publication year: 1998
Keyword(s): Crystallisation; Magnesium; Slag
Publisher: Institute of Materials Engineering Australasia
ISBN: 9780958812863, 0958812861
Publisher URL: http://www.materialsaustralia.com.au/
Peer reviewed