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Transactions of the INDIAN CERAMIC SOCIETY   Vol. 25  1966
Development of Superduty Silica Bricks with Indigenous Raw Materials
GURBUX SINGH MINHAS AND H. V. BHASKAR RAO
Pages : 25-32
DOI : 10.1080/0371750X.1966.10855550
Abstract
Development of superduty silica bricks with indigenous raw materials which are known to be abundant, was investigated in the National Metallurgical Laboratory. Three samples of quartzites from Jamda, Mihijam and Hyderabad were studied. This study has revealed that crypto-crystalline variety of Jamda quartzite which is very low in alumina, can be used successfully for the manufacture of superduty silica brick by proper granulometric control, high pressure forming and firing under strictly controlled conditions. The product thus obtained has the requisite properties of a superduty quality brick. The addition of low alumina quartzite fines to graded Mihijam quartzite did not effect any tangible improvement in the physical properties of silica brick specimen made out of the mix, probably due to the very friable nature of this low alumina quartzite from Hyderabad. However, appreciable improvement in porosity, permeability, refractoriness under load etc. could be attained by proper forming and by improved processing methods as adopted in the case of Jamda quartzite.
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