Ores / Minerals / Metals – Calcium Carbonate | NETZSCH Grinding & Dispersing

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Calcium Carbonate

General Information

Calcium carbonate (CaCO₃), which occurs primarily in the form of the minerals calcite and aragonite, is one of the most prevalent compounds on Earth. Calcium carbonate is not only the main component of marble, limestone and dolomite, it is also found in bones and teeth as well as the exoskeleton of crustaceans, coral, muscles, snails and protozoa. A further modification of CaCO₃ is the mineral vaterite, which precipitates out of supersaturated solutions in the form of microscopic crystals.
There are many varied uses for calcium carbonate:

As raw material for the construction material industry (manufacture of cement and quick lime or limestone for building and road construction)
As aggregate in the steel industry
As abrasive and polishing agent in toothpaste
As mineral fertilizer
And as mineral filler or pigment in diverse industrial applications (paper, paint, plaster, plastic, carpet)

In addition to kaolin and talc, calcium carbonate is used in the paper industry as a filler and coating pigment in the production of paper. Since calcium carbonate is rhombohedral even when very finely ground, it is primarily used in papers with the highest degree of whiteness and good printability. Examples of these are coated printing papers or highly filled copy and office papers.

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Machine Recommendations

TriNex^® Model LME / LMK Horizontal Disk Mill

The convincing disk mill system sets new standards in performance and flexibility. You profit from sophisticated technology that has been proven time and again in the processing of a wide variety of products.

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KE C Vertical Disk Mill

The optimized, vertical disk mill system guarantees reliable continuous operation, in particular for the processing of mineral and ceramic products, with the highest level of operational safety.

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CONDUX CFS/HD-S High-efficiency Fine Classifier

The CFS/HD-S high-efficiency classifiers are used successfully for fine classification of calcium carbonate that has already been ground, e.g. after a bead mill. The excellent predispersion of the product in this machine results in a high degree of separation and maximum yield. The normal separation range is between 3 - 20 µm (d₉₇).

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