Grinding aid material, method of producing it, use of it,...

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 3/14 (2006.01)

Patent

CA 2199261

A grinding aid for use in an abrasive material comprising abrasive grains and a grinding aid consists of particles obtainable by crushing a cold bath from the manufacture of metallic aluminium by reducing Al2O3. This grinding aid is produced by a method wherein the cold bath is crushed, optionally in several steps, whereby particles of an optional free metallic aluminium residue are rolled to flakes, following which the crushed material is screened to optionally sort out the formed aluminium flakes, and then the residual material is recovered as a product or is optionally subjected to further grinding and optionally screening to provide a material which preferably has a grain size distribution corresponding to 100 % by weight less than 100 micrometres. This grinding aid lends itself for use in the production of abrasive materials.

La présente invention concerne un agent de mouture à utiliser dans un abrasif constitué de grains abrasifs. Cet agent de mouture est constitué de particules obtenues par broyage d'un bain froid issu de la production d'aluminium métal par réduction d'Al¿2?O¿3?. Cet agent de mouture est produit selon un procédé consistant à broyer le bain froid, éventuellement en plusieurs étapes, à savoir, à laminer éventuellement en copeaux les résidus d'aluminium métal libre, puis à passer éventuellement au crible la matière broyée pour trier les copeaux d'aluminium ainsi formés, et enfin à récupérer la matière résiduelle sous forme de produit ou éventuellement à la broyer et la cribler encore pour fournir une matière dont la répartition granulométrique correspondante à 100 % en poids est inférieure à 100 micromètres. Cet agent de mouture se prête à l'utilisation pour la production d'abrasifs.

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