Process for purifying silica sand

Details Process for purifying silica sand Process for purifying silica sand

1993-03-26

1994-08-02

Chaudhuri, Olik

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

51313, C01B 3312

Patent

active

053343646

ABSTRACT:
A process for the elimination of iron from silica sand, comprising: abrasive-attritioning sand particles by subjecting the sand particles, in a single step and under dry conditions, to centrifugal rotation and simultaneously imparting an agitation with a translative eccentric movement and downstream and upstream movements causing that substantially all the sand particles be abrasive attritioned to each other wearing their surfaces to remove impurities covering said sand particles; and separating said iron impurities from said sand particles by magnetic separation, flotation or other known methods, thus simplifying the conventional processes just to one attrition step and suppressing the chemical treatment with acids or alkalis which was necessary in conventional processes.

REFERENCES:
patent: 3297402 (1967-01-01), Chubb
patent: 4401638 (1983-08-01), Caballero et al.
patent: 4405588 (1983-09-01), Caballero et al.
patent: 4542003 (1985-09-01), Watkins et al.

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