Re-engineered Calcium Aluminate Cement for Refractory Castables

G. Walenta, M. Schmid, R. Kaden

Calucem GmbH, 68219 Mannheim/Germany

Revision

Volume 10, Issue 3, Pages 69 - 76

Abstract

The effect of Calcium Aluminate Cement (CAC) fneness and mineralogy on workability and high temperature performance of two commercial available CAC was investigated. A medium CAC with low C A content and a high specifc surface area leads to improved fow and higher strength after fring a regular cement castable with fire-clay. A higher specifc surface of the CAC enhances sintering of the calcium aluminates with the freclay aggregates. Improved refractory castable properties of the fine ground CAC can be attributed to a higher crystalline phase content and increased hibonite formation at high temperatures.

Keywords

calcium aluminate cement, hibonite formation

References

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Göller Verlag GmbH