There are some aluminum plants in Germany that do this[1] More ambitiously ARPA-E has a program where one of the goals is light metal production(aluminum, magn

There are some aluminum plants in Germany that do this[1] More ambitiously ARPA-E has a program where one of the goals is light metal production(aluminum, magnesium,etc) using variable energy sources[1]. One of the interesting possibilities they present in the program is being able to use molten metal produced in refining as an energy storage medium. Although I couldn't find any program participants doing this one is using thermal energy storage for metal production[2]. A fair amount of metal refining processes need high amounts of heat and heat can be stored easier than electricity at scale. [0]https://www.greentechmedia.com/articles/read/german-firm-turns-aluminum-smelter-into-huge-battery https://www.greentechmedia.com/articles/read/german-firm-tur... [1]https://arpa-e.energy.gov/sites/default/files/documents/files/METALS_ProgramSummary.pdf https://arpa-e.energy.gov/sites/default/files/documents/file... [2]https://arpa-e.energy.gov/?q=slick-sheet-project/high-temperature-thermal-storage-light-metal-production https://arpa-e.energy.gov/?q=slick-sheet-project/high-temper...