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:
Jun. 20, 2023
Filed:
Mar. 04, 2019
Jfe Steel Corporation, Tokyo, JP;
JFE Steel Corporation, Tokyo, JP;
Abstract
A method for charging raw materials into a blast furnace is provided. The blast furnace includes a bell-less charging device that includes a plurality of main hoppers and an auxiliary hopper. The auxiliary hopper has a smaller capacity than the main hoppers. The method includes discharging ore charged in at least one of the plurality of main hoppers and then sequentially charging the ore from a furnace center side toward a furnace wall side by using a rotating chute. After charging of the ore is started, only the ore is charged from the rotating chute at least until charging of 15 mass % of the ore is completed based on a total amount of the ore to be charged per batch; then discharging of small-size coke charged in the auxiliary hopper is started; and then, the small-size coke is charged together with the ore from the rotating chute.