Process of preparing mineral material with particular...

C - Chemistry – Metallurgy – 01 – F

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Details

C01F 11/18 (2006.01) B02C 17/20 (2006.01) C09C 1/02 (2006.01) C09C 1/36 (2006.01) C09C 1/40 (2006.01) C09C 3/04 (2006.01)

Patent

CA 2622724

An object of the present invention is to provide a a process to grind at least one mineral material in the presence of ceria (CeO2)-containing zirconium oxide grinding beads having a specific ceria content (of between 14 and 20 % by weight relative to the total weight of said bead, preferably of between 15 and 18 %, and most preferably of approximately 16 %), and a specific average grain size (of less than 1 µm, preferably of less than 0.5 µm, and most preferably of less than 0.3 µm), wherein such beads are more resistant to wear than conventional beads of the prior art. An other object of the present invention lies in the ground 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 permettant de concasser au moins une matière minérale en présence de billes de concassage d'oxyde de zirconium contenant de l'oxyde de cérium (CeO2) ayant une teneur spécifique en cérium (entre 14 et 20% en poids par rapport au poids total de ladite bille, de préférence entre 15 et 18%, et de préférence encore environ 16%), et une granulométrie moyenne spécifique (inférieure à 1 µm, de préférence inférieure à 0,5 µm, et de préférence encore inférieure à 0,3 µm). Ces billes sont plus résistantes à l'usure que les billes classiques de la technique actuelle. L'invention concerne également la matière concassée sous la forme d'une suspension aqueuse et sous la forme d'un produit sec. L'invention concerne en outre les utilisations de ces produits dans n'importe quel secteur faisant appel à des matières minérales, notamment dans les industries du papier, de la peinture et du plastique.

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