Quick AnswerCalcium carbonate is soft (Mohs ~3), so wear is not the issue — the real question is how fine you need it and how accurately you can classify it. Rule of thumb: 80–325 mesh filler, go YGM high-pressure suspension mill; 200–400 mesh at volume, go LM vertical roller mill; 325–2500 mesh superfine, go HGM three-ring micro powder mill; above 1250 mesh ultrafine, LUM ultrafine vertical mill saves more power. Pre-crush lumps below 20 mm with a jaw crusher (6CX/PE), dry-grind and let the cla...

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