Patent ID: 8444071
Filing Date: 2013-05-21
Classification: C01F,C01P,C08F,C09C,Y10T

Abstract:
1. A process for preparing a wet ground product comprising wet grinding a mineral material product comprising at least calcium carbonate in the presence of an optional dispersing agent, in order to obtain a wet ground product with a d 50 (average diameter) of 0.4 to 1.0 microns, wherein the mineral material product, subjected to wet grinding, is prepared by the process comprising the stages of: a) crushing the mineral material in at least one crushing unit until a crushed material is obtained with a d b) optionally subjecting the material crushed according to stage a) to a flotation stage and/or a magnetic separation stage and/or a sieving stage and/or a chemical treatment stage; c) dry grinding the material according to stage a) and/or b) in at least one grinding unit: d) optionally classifying the material dry ground according to stage c) with at least one classification unit; and e) optionally repeating stages c) and/or d) on all or part of the dry ground material resulting from stages c) and/or d); wherein the material recovered following stage c) and/or d) and/or e) has a d