ALEXANDRIA, Va., July 7 -- United States Patent no. 12,674,621, issued on July 7, was assigned to FIVES FCB (Villeneuve d'Ascq, France).
"Calcination unit for decarbonating raw materials" was invented by Jean-Michel Charmet (Villeneuve d'Ascq, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "A calcination unit able to decarbonate raw materials intended for clinker production, the unit including: a main duct in which the raw materials circulate according to a first movement direction, the raw materials being calcined in the main duct; a solid fuel supply duct opening onto the main duct via a fuel outlet, the solid fuel moving according to a second movement direction; a retaining device located in the mai...