ALEXANDRIA, Va., May 12 -- United States Patent no. 12,624,404, issued on May 12, was assigned to JFE STEEL Corp. (Tokyo).
"Method for operating blast furnace" was invented by Yoshifumi Kobashi (Tokyo), Naoshi Yamahira (Tokyo) and Toshiki Tsuboi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for operating a blast furnace with which, even in the case where there is an increase in the powder ratio of coke to be charged into the blast furnace, it is possible to achieve the stabilization of blast furnace operation. The method includes blowing air through a tuyere disposed in a lower part of the blast furnace, successively measuring a particle size distribution of coke transported to the blast fur...