| 摘要 |
<p>The present invention relates to a method for dry-grinding one or more mineral materials that include at least one calcium carbonate, characterized in that said method comprises the following steps: a) crushing the mineral material or materials in at least one crushing unit until a crushed material with a d95 of less than 10 cm is obtained; b) possibly improving the crushed material according to step a); c) dry-grinding the crushed material according to step a) and/or b) in at least one grinding unit, (i) in the presence of at least one hydrophilic comb polymer containing at least one polyalkylene oxide function grafted onto at least one ethylenically unsaturated monomer, (ii) in such a way that the quantity of liquid in said grinding unit is less than 15% by dry weight of said crushed material in said grinding unit; d) possibly classifying the dry-ground material according to step c) with at least one classification unit; e) possibly repeating step(s) c) and/or d) on all or part of the dry-ground material resulting from step(s) c) and/or d); and characterized in that the material collected after step c) and/or d) and/or e) has a d50 (average diameter) of 0.5 to 500 microns.</p> |
