Process for consolidation of fine alumina particles

Details Process for consolidation of fine alumina particles Process for consolidation of fine alumina particles

1978-08-24

1980-05-20

Carter, Herbert T.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

23313R, 264 66, 264109, C01F 702

Patent

active

042039622

ABSTRACT:
A method for the consolidation of fine alumina particles, like those made by the dry oxidation of aluminum chloride, to produce a metallurgical grade alumina that resembles Bayer alumina in the following properties; dissolving as well in a Hall cell; absorption of water; absorption of hydrogen fluoride gas to eliminate that contaminant from the Hall cell offgases in a fluid bed; bulk density; particle size distribution; purity and handling.
The method comprises the uniform admixture of caustic soda solution, compressing, autoclaving, then drying and calcining the mass; finally crushing and screening the solid product with recycling of the fines.

REFERENCES:
patent: 4051222 (1977-09-01), Guyra
patent: 4108971 (1978-08-01), Takumi et al.

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