Economical process of manufacturing very fine co-ground...

Details Economical process of manufacturing very fine co-ground... Economical process of manufacturing very fine co-ground...

C - Chemistry, Metallurgy

01

F

C01F 11/18 (2006.01) C09C 1/02 (2006.01) C09C 3/04 (2006.01) D21H 19/38 (2006.01)

Patent

CA 2622799

An object of the present invention is to provide a process to obtain a calcium carbonate material comprising GCC and PCC, presenting a fraction of particles finer than 1 ~m of greater than 80%, preferably of greater than 85%, more preferably of greater than 90%, and even more preferably of greater than 95%, and a specific surface area of less than 25 m2/g, in a cost efficient manner, wherein GCC and PCC are co-ground, possibly with at least another mineral material. An other object of the present invention lies in the co-ground calcium carbonate material in the form of an aqueous suspension and in the form of a dry product. An other object of the present invention lies in the uses of such products in any sector making use of mineral material, and notably in the paper, paint and plastic industries.

L'invention concerne un procédé qui permet d'obtenir une matière de carbonate de calcium comprenant GCC (carbonate de calcium concassé) et PCC (carbonate de calcium précipité), présentant une fraction de particules plus fine que 1 µm supérieure à 80 %, de préférence supérieure à 85 %, de préférence encore supérieure à 90 %, voire à 95 %, et une aire spécifique inférieure à 25 m2/g, d'une manière rentable, dans laquelle GCC et PCC sont concassés ensemble, éventuellement avec au moins une autre matière minérale. L'invention concerne également la matière de carbonate de calcium concassée ensemble sous la forme d'une suspension aqueuse et sous la forme d'un produit sec. L'invention concerne enfin les utilisations de ces produits dans n'importe quel secteur faisant appel à une matière minérale, notamment les industries du papier, de la peinture et du plastique.

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