ELECTROCORUNDUM AND METHOD OF MAKING IT Russian patent published in 2009 - IPC C04B35/107 C04B35/653 C01F7/38 

FIELD: chemistry.

SUBSTANCE: present group of inventions pertains to electrocorundum, method of producing it and production of refractory materials. The electrocorundum contains, in wt %: 88-97 titanium corundum containing 1-4 thialite and rutile, 2-8 aluminosilicate glass phase. The electrocorundum is obtained through melting furnace charge containing 40-60 wt. % alumina and heat-treated bauxite containing the following, in wt %: 82.2-93.0 Al₂O₃, 3-10 SiO₂, 2-5 TiO₂, 1.5-2.0 Fe₂O₃, 0.3-0.5 CaO+MgO, 0.2-0.3 other impurities. The furnace charge is melted in an oxidation-reduction medium. The electrocorundum has high heat resistance, retains the same volume and agglomeration at relatively low temperature. No ferrous alloys are formed in the melting process.

EFFECT: increased heat resistance, volume constancy and agglomeration of the corundum at relatively low temperature.

2 cl, 2 tbl