ALEXANDRIA, Va., July 23 -- United States Patent no. 12,365,953, issued on July 22, was assigned to JFE STEEL Corp. (Tokyo).
"Method of operating blast furnace and blast furnace ancillary facility" was invented by Yuki Kawashiri (Tokyo), Sumito Ozawa (Tokyo), Koichi Takahashi (Tokyo), Taihei Nouchi (Tokyo) and Yuya Morita (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a method of operating a blast furnace, including generating a regenerative methane gas using a blast furnace by-product gas, and blowing a blast gas and a reducing agent into the blast furnace from a tuyere, in which the blast gas is oxygen gas, the regenerative methane gas is used as at least part of the reducing agent, and ...