Industrial uses of our aggregates 2017-01-11T11:39:15+00:00

Plastic manufacturing

In general, calcium carbonate is the most important mineral in the plastics industry. The most outstanding proporties of calcium carbonate in the plastics industry are the following:

  1. Its high purity, which prevents any adverse catalytic effect in the ageing of the polymers.
  2. Its high degree of whiteness.
  3. Its low refraction index, which allows pastel shades and whites.
  4. Its low level of abrassiveness, which improves the life span of machines and equipment.
  5. Its good dispersability, particularly in the coated mechanical grades.
  6. Its low cost.

Calcium carbonate is widely used in oilcloths and plastics, particularly in plastified, rigid and polyolefin PVC. The surface treatment of the calcium carbonate provides the advantages of low plasticiser absorption and improved dispersion.

Calcium carbonate is a product with high whiteness, low oil absorption and good dispersion characteristics, which make it into an excellent general mineral load. It is used in the manufacturing of plastics, oilcloths, coatings and sealants, where a uniform product without any large particles is very important. And furthermore, its use in unsaturated polyester compounds (SMC, VMC, TMC) gives the finished parts excellent physical and surface properties. In short, the most important applications of calcium carbonate in this industrial sector are included in the manufacturing of: plasticised PVC, PVC plastisols, rigid PVC, polypropylene, polyethylene and unsaturated polyester resins.

Soap and detergent industry

Calcium carbonate is used as a mineral filler to obtain a high retention of humidity, to improve the consistency and drying of the end mass, to improve the aspect of the soaps and to control the end weight of the product. Additionally, it does not alter the physical and chemical properties of the soapy products, or the viscosity of the mixture.

Calcium carbonate improves the cleaning action of soaps and detergents owing to a suitable degree of abrassiveness; it is not retained by the textile fibres nor does it damage the clothing, since it does not contain free silica.

Rubber industry

Calcium carbonate is used in the production of natural and synthetic rubbers, maintaining the flexibility, increasing torsional and tensile strength, improving the mechanical and electrical characteristics of the rubber and reducing the production costs.

Calcium carbonate decreases the ageing of the rubber and the fatigue of the material; it does not change its appearance; it does not heat it and it prevents breakages. Its consistency and high chemical purity allow it to act in the mineral fillers, on its own or mixed with other products, depending on the formulation of the resins and of the user’s requirements. Additionally, it reduces the production costs of the resins.

Preparation of paints

Calcium carbonate provides greater coverage, in this way increasing yield in high quality, oil-based synthetic paints and in other coatings. It has great whiteness, meaning it does not interfere with the colour of the paint and it contributes to its opacity and to the fact that it covers the surfaces without running.

It is also used in coating and painting systems offering an excellent shine, good Hegman values, with high mixing speed and good properties on surfaces on solvent and water-based systems.

Calcium carbonate offers paints a surface treatment that make its particles hydrophobic, in such a way that they increase its compatibility in an organic means aiding its dispersion.

Animal feed

Calcium carbonate is used to improve the yield of all kinds of animal feeds. The integrity of egg-laying chicken’s egg shells and the strength of bones of all animals is very important for quality meat and egg production. Such is the case that Carbonates with a high calcium content (minimum of 38% of elemental calcium) are the primary calcium source in animal feeds.

The “undesirable substances in animal feed” content is governed in Spain by the Royal Decree 465/2003, of the 25th of April, on undesirable substances in animal feed. In this decree it set forth some maximum limits of 2 ppm As, 10 ppm Pb and 5 ppm Cd for the limestones as products for use in animal feed. But the R.D. 465/2003, of the 25th of April was modified by the Order PRE/1809/2006, of the 5th of June, establishing some new maximum limits for limestones of 10 ppm As, 20 ppm Pb and 5 ppm Cd; and these values are the ones in force at present.

Glass manufacturing

Glass manufactures need high quality limestones and dolomites, carefully selected, crushed and calibrated for their incorporation to the process.

The supplied products provide calcium and magnesium, essential components for hollow glass, fibreglass, optical glass, glass wool, bottles, etc.

The paper industry

Natural or preciptate micronised calcium carbonate are used as a mineral load and this is increasingly appreciated for printing or writing papers.


The fertiliser industry uses limestone or dolomite “filler” to provide these nutrients in the formulations of chemical fertilisers.

Thermal power stations

Desulphurising. In fluidised bed thermal power stations limestone “filler” can be used to eliminate the excess sulphur present in the fossil fuels that are used tp generate electrical energy.

The pharmaceutical and cosmetic industry

Extremely pure calcium carbonate, containing no As, Pb and Hg, as well as low Fe and heavy metal content is required.

The steel industry

It is used as a flux and scarifier.

The metal industry

It is used in the smelting of copper, lead and zinc. In the production of magnesium.

In the production of aluminium as a scarifier, preventing the forming of aluminium and silica compounds.

The chemical industry

It is used in the production of soap, in the manufacturing of rubber and calcium carbide, in the oil industry, in the paper industry, in cosmetics and in the preparation of paints.

The food industry

It is used in the sugar industry for preparing sugar beet, manufacturing animal feeds, pisciculture, the dairy industry, etc.

Our aggregates are suitable for the different industrial sectors requiring a limestone with a high purity of calcium carbonate, as it has a 99.45% content. Therefore, we improve their production yield; we decrease their waste and we improve their emissions.





Our limestones are extraordinarily pure, and their compositional homogeneity is worth mentioning. Therefore, their content in potentially harmful trace elements is very low.


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