ALEXANDRIA, Va., March 24 -- United States Patent no. 12,584,183, issued on March 24, was assigned to JFE STEEL Corp. (Tokyo).
"Molten iron dephosphorization method" was invented by Yumi Murakami (Tokyo), Nobuhiko Oda (Tokyo), Hidemitsu Negishi (Tokyo), Ryo Kawabata (Tokyo), Naoki Kikuchi (Tokyo) and Yusuke Fujii (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A dephosphorization method using a top and bottom blown converter. This method uses a converter charged with molten iron and slag, to blow an oxygen-containing gas from a top-blowing lance, supply the gas from an inlet of a blowing hole, and supply a control gas from an opening toward an axial center. This method has: a slag top-surface position ...