US-backed project to use solar for cement production

Solar MEAD is a collaboration between CEMEX, Sandia National Laboratories and Synhelion, the Swiss company whose concentrated solar thermal (CST) technology can deliver process heat in excess of 1,500°C. CEMEX and Synhelion have been investigating CST in the cement production process, using it to produce clinker, a key component in the building material. In 2022, they achieved a successful laboratory-scale pilot, producing the first-ever solar clinker. Sandia Laboratories will contribute its research facilities as part of the National Solar Thermal Test Facility, as well as providing domain expertise.

"Few renewable technologies are capable of generating heat at the temperatures needed to process raw cement feedstock," said Nathan Schroeder, Sandia researcher and principal investigator for the Solar MEAD project. "This project will advance our understanding of how to use concentrating solar technology to gather and deliver the heat to existing cement production facilities and will have crosscutting relevance to other ore processing industries such as refractory, ceramics, and battery production."