Process for comminuting and activating limestone by reaction...

Details Process for comminuting and activating limestone by reaction... Process for comminuting and activating limestone by reaction...

B - Operations, Transporting

01

J

252/18, 23/349

B01J 20/04 (2006.01) B01D 53/34 (2006.01)

Patent

CA 1137456

ABSTRACT OF THE DISCLOSURE The present invention relates to A non-mechanical method of converting coarsely ground limestone to a very fine powder. A slurry of ground calcium carbonate or limestone is contacted with carbon dioxide gas at high pressure to convert the solids in the slurry to an unstable form. The carbon dioxide pressure is then instantaneously released to form a slurry of activated calcium carbonate particles substantially reduced in size. This activated calcium carbonate slurry ray be used to scrub flue gases.

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