Abstract
This work describes the studies to reuse secondary aluminium production waste (SAPW) derived from aluminium casting processes in the fabrication of mullite-based refractory ceramics. SAPW was characterized by using particle size analysis, X-ray di raction (XRD), scanning electron microscopy (SEM) and X-ray uorescence (XRF). Secondary aluminium production waste (SAPW), quartz and Grolleg kaolin were mixed stoichiometrically, according to chemical formula of mullite (3Al2O3 · 2SiO2) by ball milling. Cylindrical samples were consolidated by uniaxial dry pressing and sintered at di erent temperatures (up to 1350 ◦C). The phase and microstructural evolution, water absorption, bulk density, mechanical properties of sintered samples were investigated and refractory ceramics based on mullite were obtained.
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