Method for the production of alumina

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group iiia metal or beryllium

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423127, 423131, 423121, C01F 704

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042567092

ABSTRACT:
An improved method for recovering aluminum values from alkaline aluminosilicate raw material by sintering a comminuted aqueous mixture of the alkaline aluminosilicate material, limestone and soda solution wherein the alumino-silicate material is first comminuted with the soda solution to form a mixture with a fraction of particles larger than 0.08 mm greater than 20 percent by weight, mixing limestone with the mixture and comminuting until the fraction of particles larger than 0.08 mm is between 2 and 15 percent by weight.

REFERENCES:
patent: 3642437 (1972-02-01), Angstadt et al.
patent: 4044095 (1977-08-01), Hudson et al.
patent: 4113833 (1978-09-01), Eremin et al.
Mujahed et al., "Institution of Mining & Metallurgy, Transactions, Sect. C", Dec. 1974, pp. C241-C249.

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