Preparation Of Calcium Aluminate-Spinel Synthetic Aggregates Using Electrostatic Precipitated Dolomite DustAnd Calcined Alumina

Abstract

Calcium alumniate-spinel phases have been developed for synthetic aggregate from ESP dolomite dust and calcined alumina. A huge amount of dolomite dust is collected at electrostatic precipitator (ESP) during dead burning of raw dolomite in Rotary Kiln. This dust is waste material and does not have any practical use in refractory plants. The Present thesis focuses the utilization of these waste dolomite dust for the development of value added calcium aluminate spinel aggregates. Dolomite is a double carbonate of calcium and magnesium. An attempt has been made to different calcium aluminates and spinel aggregates by solid state reaction between the ESP precipitated dolomite dust and calcined alumina. The phase formation behaviour has been reported from the study of the XRD diffraction pattern as function of calcination temperature. The different physical properties of the aggregated have also been reported.