in a responsible manner
The production processes of the mining and lime industry are energy intensive. Quarrying, crushing, grinding and calcination of limestone all require significant amounts of energy. Nordkalk continuously strives for improved energy efficiency, which can be reached through optimised processes and capacity utilisation, and by making reduced energy consumption a priority in new investments and repairs.
Reduced energy consumption through optimised processes and capacity utilisation
In 2015, Nordkalk carried out energy audits at several sites. In addition to finding potential areas for improvement, these audits also help Nordkalk to meet the requirements set out in the European Energy Efficiency Directive (EED). It establishes a set of binding measures in order for the EU to reach its 20% energy efficiency target by 2020.
We are also promoting alternative fuels with a decreased environmental footprint as well as the adoption of new, advanced energy solutions.
Biofuel tested at Ignaberga in Sweden
In 2015, Nordkalk tested the use of biofuel at its facility in Ignaberga. The fuel is a surplus product from ecological feed production. The tests have given good results for both the environment and Nordkalk. Therefore an investment will be made to adjust the production and equipment for the switch from fossil fuels to biofuels.
The tests have given good results for both the environment and Nordkalk.
Nordkalk was granted climate investment support for the Ignaberga project by the Swedish Environmental Protection Agency in December 2015. The support was granted in the context of the Climate Leap (Klimatklivet), an effort to reduce greenhouse gas emissions. Nordkalk is one of twelve companies receiving support for "measures that demonstrate the greatest sustained reduction of greenhouse gas emissions per crown invested".
About a third of the energy Nordkalk consumes comes from coal, which is used in lime burning, as are oil, natural gas and coke oven gas. Electricity is used for crushing and grinding, and fuel oil, natural gas and liquid petroleum gas for the drying process.
Improvements in 2015
The most significant energy efficiency improvements in 2015 were related to
- the optimisation of the kiln process in Köping
- implementing new waste heat recovery from the atomising air compressors at the kiln in Verdal
- installation of a new washer unit in Miedzianka
- renewal of the heat recovery unit at the rotary kiln in Tytyri
- renewal of quarry vehicles in Lappeenranta and Pargas.
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.