Spinel Production1

Abstract

Methods are described for producing aluminium-magnesium spinel by solid phase synthesis using commercial alumina and caustic magnesite. It is proposed to replace commercial alumina by dust deposited in the aspiration system for an aluminum hydroxide calcination rotary furnace that makes it possible to exclude the stage of milling alumina. Methods are provided for spinel synthesis in electric arc furnaces with block melting and pouring of a charge. The effect of the MgO/Al₂O₃ ratio in electrically melted material on its properties, method for adding a charge to an electric furnace during melting for pouring, features and properties of spinel materials with subsequent molded object sintering, are studied.