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  • 3-5mm Activated Alumina for Filtration

    3-5mm Activated Alumina for Filtration

    Spherical balls of alpha-alumina (corundum) is produced by sintering ball-formed calcined alumina at a temperature just under the 3704°F (2040°C) fusion point of aluminum oxide. These tabular alumina balls are then crushed, graded or screened, and ground to a wide range of granule. The powder size must be controlled in good condition, meanwhile adding special film formation additive . Otherwise, the corundum gravel can not absorb the particle from liquid metal。 There are four kinds of filtration media: . 1XXX,3XXX,8XXX;2XXX,7XXX;5XXX,6XXX;High purity aluminium. The Film formation additive is different.