Abstract
Kiln rollers’ grind waste powders (KRGW) collected from a ceramic factory are considered a high alumina waste consisting of several phases. The KRGW was treated hydrothermally at 150°C for different time periods. The hydrothermal method was found to be a very effective method for the management of KRGW in synthesizing new nanomaterials with new morphologies. Raw and treated kiln rollers’ grind waste was characterized using XRF, XRD, TEM, BET, DTA, and TGA. TEM of the raw KRGW showed a lamellar crystal structure with different shapes and morphologies. XRD displayed hour different phases with a high percentage of mullite and corundum due to the high levels of Al and Si in the raw waste. Treated KRGW exhibited nano-sieves with different morphologies consisting of two predominant phases, namely calcium aluminum oxide and corundum. Results indicated that the hydrothermal process assists phase changes, crystal size, and morphology of the KRGW. This modification is expected to improve over all properties of KRGW for efficient practical applications.
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