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  • Circular economy in action

Saint-Chély d'Apcher heats more than 1150 homes thanks to the energy saved and collected at the ArcelorMittal mill.

The city of Saint-Chély d’Apcher built a new heating system in 2015, along with a network of 4.5 kilometres of pipes to connect more than 55 buildings in the city (homes, city buildings, swimming-pools…).
This heat network has allowed the city to switch completely from fossil energies to renewable wood consumption. The town is almost autonomous in its consumption as far as heating is concerned.

Since June, a new heat recovery system has been put in place at the ArcelorMittal mill, which takes benefit of the energy spread by the cooling of the steel with a temperature of above 1000°C.

The heat that comes out of this process is used for industrial purposes, to heat the halls of the plant, and feeds the heat network of the city.


This new investment of 5.6 million euros, representing 30 000 hours of work, is a joint project of RESC, Schneider Electric, Scabe and ArcelorMittal, and was supported by public funds from Ademe and Occitanie Region and by Kyotherm, private equity investor in biomass, geothermal, solar thermal and energy savings.

It allows reducing the carbon footprint of both the mill and the city by more than 4000 tonnes of CO2 per year, equivalent to taking 2,000 new vehicles off the road. The new heat recovery system produces 13,500 megawatt hour (Mwh), the equivalent of the consumption of 1150 homes, and was officially inaugurated on June 5, World Environment Day.

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Copyright images: ArcelorMittal