Title:
ELECTRIC FURNACE AND ELECTRIC FURNACE STEEL MAKING METHOD
Document Type and Number:
Japanese Patent JP2023004698
Kind Code:
A
Abstract:
To provide an electric furnace and an electric furnace steel making method capable of improving a carburization speed while using an inexpensive carbonaceous material and realizing carburization to molten iron without elongating a cycle time.SOLUTION: An electric furnace 1 has a graphite electrode 2 and a carbonaceous material addition device 3. Regarding an intersection point (electrode center point 22) between a vertical line passing through a figure center of gravity of an electrode lower end viewed from below in a vertical direction and a molten iron stationary face, and an arrival position (carbonaceous material arrival point 23) from the carbonaceous material addition device 3 to the molten iron stationary face of a carbonaceous material, a position and an angle of the carbonaceous material addition device are set so that a distance between the carbonaceous material arrival point 23 and the electrode center point 22 falls within a range within an electrode radius r, and further, even when the electric furnace has an oxygen lance 8 feeding oxygen into the furnace, an oxygen arrival point 24 of the oxygen lance 8 is not positioned at a position within the double of the electrode radius r from the electrode center position 22.SELECTED DRAWING: Figure 1
Inventors:
SATO TOKIO
ASAHARA AKIFUMI
SASAKI NAOTO
ASAHARA AKIFUMI
SASAKI NAOTO
Application Number:
JP2021106562A
Publication Date:
January 17, 2023
Filing Date:
June 28, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
F27B3/08; C21C5/52; C21C7/00
Attorney, Agent or Firm:
Intellectual Property Office