Inu•stigntion into the Refractory Properties of Tntiko and Clays

Abstract

This study undertakes the characterisation and analysis of two clay samples obtained from Tatiko and of Niger State, Nig«ia to determine their suitability for use as refractories. Chemical analysis was carried out using atomic absorption spectrophotometry (AAS) methods and both clays were found to of similar composition with high silica, moderate alumina and low ferric oxide content with trace quantities of magnesium and calcium oxides. The results of physical tests conducted show low cold crushing strength (15.8 and 16.6 KN/m2 respectively for Tatiko and Beji clay) fair refractoriness (1300 and 1350 C) bul very good linear shrinkage (both below 1.4%) and fair thermal shock resistance (at 10 and 9 cycle). These properties make Beji and Tatiko clays good for handling low melting metals, paint, chalk and earthenware