Das, S K (2011) New development of wear resistant high alumina aggregates for application in monolithic castables. In: 12th Biennial Worldwide Conference on Refractories, UNITECR 2011, 30 October - 2 November 2011, Kyoto; Japan.

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Abstract

In the present investigation, high Al2O3 based wear resistant ceramic materials were produced from a mixture of calcined Al2O3, clay and selective dopants. In another attempt, costly alumina was partly replaced by beach sand sillimanite, high purity fly ash. The compact green samples of each compositions were heated in the temperature range of 1350-1600°C. The heated products were found to be highly densed, hard and impervious. The Morgan Marshall abrability index value of the sample was found to vary between 5 and 12 depending upon the alumina content. The heated samples were also subjected to physical and thermo-mechanical testing including erosion rate at different angles of impingement. The results are analyzed and discussed. The phase and microstructure evolution were thoroughly studied using XRD and SEM studies. The heated samples were finally crushed, ground and converted to aggregates in different size fractions. To study the compatibility of these aggregates, few monolithic castable compositions were formulated with the newly developed aggregates by part replacing regularly used tabular/fused high alumina aggregates. It was observed that the presently developed alumina aggregates has beneficial effect on the Hot MOR and other thermo-mechanical properties of the castable.

Item Type:	Conference or Workshop Item (Paper)
Additional Information:	12th Biennial Worldwide Conference on Refractories, UNITECR 2011; Kyoto; Japan; 30 October - 2 November 2011
Subjects:	Refractories
Divisions:	Refractory
Depositing User:	Bidhan Chaudhuri
Date Deposited:	17 Jun 2016 06:49
Last Modified:	17 Jun 2016 06:49
URI:	http://cgcri.csircentral.net/id/eprint/3508

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