Perceptions and Characteristics of Fused and Sintered Refractory Aggregates
1 Almatis GmbH, Frankfurt/Ludwigshafen/Germany
2 Almatis Alumina Pvt. Ltd, Kolkata/India
3 Stourbridge/Great Britain
Revision
Volume 7, Issue 4, Pages 75 - 81
Abstract
There are many perceptions in the market about the most appropriate refractory aggregate for a particular application. Opinions about the relative benefits of the fused and sintered versions of synthetic high alumina materials are set and often difficult to discuss and refute. But changes in the refractory raw materials market over the past few years have influenced the properties of the currently available synthetic high alumina materials and triggered the development of new aggregates. The purpose of this paper is to outline the differences between high alumina fused and sintered raw materials. The focus will be on physical properties such as density, porosity and grain shape, but the influence on the final properties of refractory formulations such as bricks, castables or dry vibratable mixes is also discussed (DVMs).
Keywords
refractory aggregates, AMC bricks, vibration mixes, high alumina bricks
References
[1] Amthauer, K.; et al.: New European sinter aggregate with 96 % Al2O3, 54. Int. Coll. on Refractories, Aachen 2011, 95–98 [2] Cichy, P.: Fused alumina – pure and alloyed – as abrasive and refractory material. In: Alumina science and technology handbook. Ed. L.D. Hart. Westerville, OH (1990) 393–426 [3] MacZura, G.: Production processes, properties, and applications for calcium aluminate. In: Alumina science and technology handbook. Ed. L.D. Hart. Westerville, OH (1990),109–170 [4] Büchel, G.; et al.: Review of tabular alumina as high performance refractory material. Interceram Refractories Manual (2007) 6–12 [5] Borovikov, R.: Untersuchungen zum Verschleiß hochtonerdehaltiger Feuerfestmaterialien für die Pfannenmetallurgie im Stahlwerksbetrieb. PhD thesis, Freiberg 2002 [6] Liu, X.; et al.: Tabular alumina for high purity corundum brick. The 5th Int. Symposium on Refractories (ISR’2007) [7] www.retsch-technology.com/rt/ applications/technical-basics/particle-shape/ [8] Klewski, M.; et al.: Spinel formation and technical properties of AluMagCarbon bricks with different alumina aggregates. UNITECR 2015 [9] Shankha Chatterjee, A.; et al.: Role of tabular alumina as a suitable aggregate for emerging applications – focus on dry ramming mix. IREFCON 2014, 97–103
Copyright
Göller Verlag GmbH
