US Patent Issued to NIPPON STEEL on June 17 for "Method for producing chromium-containing molten iron" (Japanese Inventors)

ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,368, issued on June 17, was assigned to NIPPON STEEL Corp. (Tokyo).

"Method for producing chromium-containing molten iron" was invented by Norifumi Asahara (Tokyo), Katsuhiko Kato (Tokyo), Mikio Futaka (Tokyo), Yasuhiro Tanaka (Tokyo), Naoki Kaneko (Tokyo) and Junichi Nakagawa (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A charged material containing alloy iron of at least one of ferrochrome containing metallic Si or ferrosilicon, and unreduced slag containing Cr oxide generated by oxidative refining, is charged into an electric furnace as a mixture in which a mass ratio of a metallic Si amount to a Cr oxide amount is from 0.30 to 0.40, and...