in a responsible manner
Nordkalk strives to use all of its raw materials, aiming for 100% material efficiency, which is sound from both financial and environmental point of view.
The material-efficiency efforts include using all by-products: wall rock that is extracted in addition to regular limestone, fine sand produced in the flotation process, filter dust, which builds up in all lime kilns and at grinding plants, and residues created in lime burning and slaking. Nordkalk also assists its customers by handling their process by-products in a sustainable way.
In 2015, Nordkalk was able to raise the material efficiency rate from 90.9% to 94.3%, thanks to focus on sales of lime kiln dust and especially of wall rock.
Wall rock is used to build infrastructure, e.g. foundations for roads, airports and windmill parks. In addition to the Finland's domestic market, stone products are shipped e.g. to the Baltics and Russia for infrastructure projects.
All of Nordkalk’s stone material is CE marked, which supports sales, as does the growing environmental awareness in the society. Paying a price for the transportation of stone is to be compared to starting to extract stone in untouched areas near construction sites and at the same time dumping previously quarried stone elsewhere.
Wall rock is typical of Finnish quarries for geological reasons. In the Lappeenranta and Pargas quarries, wall rock represents approximately one third of all quarried stone products.
Processed and sold stone
To storage and disposal
Material efficiency target 100%
Result in 2015: 94.3%
Target in 2016: >95%
Nordkalk is the leading limestone company on its home markets. We deliver essential raw materials to numerous industries, and our solutions contribute to clean air and water as well as productivity of agricultural land.