Process of manufacturing a co-ground calcium carbonate...

C - Chemistry – Metallurgy – 01 – F

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Details

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

Patent

CA 2622757

An object of the present invention is to provide a process to obtain a calcium carbonate material comprising GCC and PCC, with a specific steepness factor (defined as d30 / d70 x 100, where dx is the equivalent spherical diameter relative to which x % by weight of the particles are finer) of at least about 30, preferably of at least about 40, and most preferably of at least about 45, 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 the obtained 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 materials, 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 un facteur de pente spécifique (ainsi défini d30/d70 x 100, dx étant le diamètre sphérique équivalent par rapport auquel x % en poids des particules est plus fin) d'au moins environ 30, de préférence au moins environ 40, voire au moins environ 45, d'une manière rentable, GCC et PCC étant concassés ensemble, éventuellement avec 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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