The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 1982
Filed:
Sep. 11, 1980
Nippon Kokan Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for operating a blast furnace, characterized by: adding a prescribed volume of blast furnace gas to an air for blast fed to a hot stove; oxidizing, in the hot stove, CO contained in the blast furnace gas into CO.sub.2 and H.sub.2 contained therein into H.sub.2 O to prepare a blast containing CO.sub.2 and H.sub.2 O and additionally heated by the above-mentioned oxidation; blowing the resultant blast containing CO.sub.2 and H.sub.2 O into a blast furnace through tuyeres thereof; thereby controlling the calorific value at the portions around the tuyere exits as a result of the endothermic effect produced by the reactions at the portions around the tuyere exits of the CO.sub.2 and H.sub.2 O contained in the blast with red-hot coke in the blast furnace wherein the amount of the blast is substantially equal to that of a blast without addition of a blast furnace gas.