Reinforcement of corundum ceramic with filamentary mullite crystals

Abstract

Thus on the basis of our investigations we have found the technological parameters for obtaining dense refractories. It should be noted that refractories with low porosity and high spalling resistance were obtained from Korean magnesite, which is harder to sinter than Satka magnesite.Industrial realization of the recommended technological parameters is difficult owing to the lack of sections for preparing narrow-fraction powders and the limited number of bunkers. The problem of preparing narrow-fraction powders is complicated, but can evidently be solved by combined use of vibrating screens and pneumatic classifiers. To solve the second problem we could combine the bankers of two production lines, in such a way that the combined bunkers simultaneously serve two mixers via a movable bunker. CONCLUSIONSThe authors have determined the technological parameters for producing periclase--chromite refractories with given indices of porosity and spalling resistance. They have found empirical equations for these properties in terms of the technological parameters.In industrial conditions it is possible to obtain dense refractories satisfying the requirements of GOST 10888-76. LITERATURECITED