Characterization of Amaiyi Edda Clay Deposit as Refractory Material for Furnace Lining

Abstract

The performance evaluation of the refractory properties of Amaiyi Edda clay in Afikpo South local Government Area (Edda) of Ebonyi State Nigeria was investigated. The clay sample collected from the deposit was crushed, soaked, sieved, dried and ground. The chemical and mineralogical analyses were done using X-ray fluoresce and X-ray diffraction while the micro structural examination was done with scanning electron microscope. The processed sample was molded, dried and fired at 12000C. The refractory properties were tested based on ASTM standards. Results obtained show that Amaiyi clay has 22.9% alumina and 48.9% silica, hence qualify for high melting clay. The clay has linear shrinkage of 4%, bulk density of 2.15g/cm3, apparent porosity of 11.56%, thermal shock resistance of 29 cycles, modulus of rupture of 33.5 N/mm2, thermal conductivity of 3.97W/m0C and refractoriness of 15200C. Hence, the results showed that the clay can be used for lining of heat treatment and melting furnace for non ferrous metal, ceramic kiln and oven ladle.