Perceptions and Characteristics of Fused and Sintered Refractory Aggregates

Dagmar Schmidtmeier1, Shanka Chatterjee2, Marion Schnabel3, Jerry Dutton4, Andreas Buhr5

1 Almatis GmbH, Frankfurt/Ludwigshafen/Germany
2 Almatis Alumina Pvt. Ltd, Kolkata/India
3 Almatis GmbH, Frankfurt/Ludwigshafen/Germany
4 Stourbridge/Great Britain
5 Almatis GmbH, Frankfurt/Ludwigshafen/Germany


Volume 7, Issue 4, Pages 75 - 81


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).


refractory aggregates, AMC bricks, vibration mixes, high alumina bricks


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