Scientific-technological solutions ensuring the production of high-alumina lightweight refractories

Three variants of the introduction of an active burning-off addition into the forming mixture for the production of high-alumina lightweight refractories are investigated. The optimum composition and drying regime are determined. The possibility of replacing 30 – 40% of finely milled KDSP powder by disthene-sillimanite sand with natural grain size is established. The method of photoelasticity by freezing the stress state of the model is used to determine the pressure developed in the mixture. Recommendations are given on the firing rate of the green with allowance for the dynamics of polystyrene pyrolysis. Articles with improved physicomechanical properties and operating characteristics are produced.Translated from Ogneupory, No. 6, pp. 13 – 15, June, 1995.