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Swiss company Panatere has inaugurated two solar furnaces in La Chaux-de-Fonds, aimed at recycling steel offcuts from the watchmaking industry using clean solar energy.
The project melts production waste into steel ingots using concentrated sunlight, reducing emissions and promoting short, local supply chains.
Panatere plans to scale up to 1,000 tonnes of recycled steel annually by 2028, employing solar furnaces that reach 2,000°C.
The system uses a 140 m² heliostat with movable mirrors to focus sunlight, representing a breakthrough in eco-friendly industrial metallurgy.
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