Process for obtaining electro - melted corundum

摘要

P the invention relates to a process for preparing électrocorindo. / p & & p & is melted in an electric arc furnace has the commercial alumina with the contents of the alkalis located between 0,05 and 0,60% by weight and of the contents of al2 o3 greater than 95% by weight, b of the sio2, for example, of the quartz sand, and possibly of the alkalis, it is cooled and ground in the molten mass of a known manner, is then separated mechanically and / or chemically the vitreous phase formed. / p & & p & usual applications. / p