Influence of silica- and magnesium-containing additives on certain properties of corundum rammed masses

Conclusions The principal properties of masses based on electrocorundum significantly and unambiguously vary with the amount and composition of the additives introduced and with the type of electrocorundum and binder.Silica-containing additives dilate the corundum matrix to a lesser degree than magnesium-containing additives; orthophosphoric acid reduces the porosity and increases the strength of specimens from masses to a greater degree than a. s. w., regardless of the type of electrocorundum and additives; it also greatly reduces the growth of specimens with magnesium-containing additives; white electrocorundum can be used as the corundum component besides titaniferous and chromous electrocorundum.Translated from Ogneupory, No. 1, pp. 40–43, January, 1981.