Using low-alkali, finely dispersed aluminum hydroxide, separated from anode slurries, we obtained low-alkali, deeply calcined alumina in a single stage without mineralizing additives and also in the presence of small amounts of aluminum fluoride with an addition of magnesium chloride at lower temperatures than with the industrial technology. The low cost of the alumina obtained from this source and their wastes, which are dumped, the accomplishment of a single-stage calcination instead of the double-stage calcination of aluminum hydroxide, using intermediate washing with a solution of sulfuric acid, the exclusion of expensive labor- and energy-consuming operations of milling the alumina and cleaning it to remove iron impurity all contribute to a marked cheapening and a simplification of the production method for deeply calcined, low-alkali alumina. The resulting low-alkali alumina, alloyed with magnesia, has a high dispersion and does not require premilling for the production of articles for growing single crystals of leucosapphire, corundum refractories and ceramics, since the degree of its sintering is equal to that of industrial alumina after milling. We recommend the production of large batches of low-alkali, finely dispersed alumina by the method developed by the Institute. The method may be used for the production of high-duty corundum refractories and ceramics.