Blue Fired Semi Friable Alumina is a low titania containing brown corundum produced by controlled smelting of special grade Bauxite in an electric arc furnace at greater than 2000 deg C. The lower titania and an intermediate toughness between that of White and Brown Regular corundum and strict control of this parameter over a narrow band ensure consistent quality.
The cooled crude is further crushed, cleanses of magnetic impurities in high intensity magnetic separators and classified into narrow size fractions. The grains are further annealed at a high temperature in a specially designed kiln to build predictable toughness characterization.
These grains are best suited for use under extreme grinding conditions where high stock removal efficiency is required. Main uses are in metals especially alloyed steels, non-Ferrous metals and alloys of Copper and Zinc.