Opaliform porcellanite and process for the preparation thereof

Details Opaliform porcellanite and process for the preparation thereof Opaliform porcellanite and process for the preparation thereof

C - Chemistry, Metallurgy

04

B

241/142, 261/41

C04B 35/14 (2006.01) B02C 23/08 (2006.01) B02C 23/18 (2006.01) B03B 5/04 (2006.01) B03B 5/10 (2006.01) B03B 5/30 (2006.01) B03B 9/00 (2006.01) C01B 33/12 (2006.01)

Patent

CA 2025190

- 40 - OPALIFORM PORCELLANITE AND PROCESS FOR THE PREPARATION THEREOF ABSTRACT The present invention provides high grade opaliform porcellanite having a purity of at least 80% active silica. The invention also provides a process for the production of a high grade opaliform porcellanite having a purity of at least 80% active silica comprising grinding and screening porcellanite rock to form granules having an average diameter of between about 0.6 and 18 mm and then subjecting said granules to wet disintegration to remove soft clays and limestone and gravitic separation to separate the lower density opaliform active silica from higher density impurities intermixed therewith.

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