Plasticizing of non-plastic refractory raw materials :Part I, Effect of certain factors in the Pot milling of Sillimanite

Effects of variations of certain factors inherent in pot milling, on the grinding of sillimanite, have been studied. Duration of grinding has a direct bearing on the production of material finer than 2.5 % from sillimanite sand. Variations in the ratio of weight of pebbles to weight of sillimanite indicate that there is an optimum ratio at which maximum finer than 1%. An important finding of these studies is that grinding sillimanite to finer than 1% releases considerable quantities of alumina that can be leached alumina in sillimanite.