METHOD OF PREPARING ALUMOMAGNESIUM SPINEL Russian patent published in 1999 - IPC

FIELD: refractories industry, more particularly, preparation of top quality spinel containing refractories. SUBSTANCE: method comprises batching original oxides MgO and Al₂O₃ at excessive amount of the latter, smelting under layer of excessive amount of Al₂O₃ on completion of smelting operation proceeding from calculated power consumption. After pouring out melt, original oxide Al₂O₃ is filled into crucible, and melt is cooled under said layer. EFFECT: greater stabilization density, higher thermal stability, and economical electric power consumption. 1 tbl