Title:
電気炉による溶鉄の製造方法
Document Type and Number:
Japanese Patent JP7259803
Kind Code:
B2
Abstract:
To produce molten iron with high productivity and energy utilization efficiency, using an electric furnace with a preheating chamber for preheating iron-based scrap with a furnace exhaust gas.SOLUTION: A lime-based slag-forming material is charged into a preheating chamber 2 together with an iron-based scrap, the slag-forming material is preheated together with the iron-based scrap in the preheating chamber 2, and then is supplied into a melting chamber 1. Since slag is formed in a short time, slag-formation is stabilized so that energy utilization efficiency is improved. Furthermore, peroxidation due to excessive preheating of iron-based scrap can be prevented and energy loss for reducing iron-based scrap that has been oxidized is suppressed, and hanging of the iron-based scrap in the preheating chamber 2 is suppressed which enables energy utilization efficiency to be improved, and enables a stable operation with high productivity to be performed.SELECTED DRAWING: Figure 1
Inventors:
Yoshihiro Miwa
Katsutoshi Endo
Koichi Tsutsumi
Okuyama Goro
Katsutoshi Endo
Koichi Tsutsumi
Okuyama Goro
Application Number:
JP2020092344A
Publication Date:
April 18, 2023
Filing Date:
May 27, 2020
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C21C5/52; C21B11/10; F27D17/00
Domestic Patent References:
| JP2015206091A | ||||
| JP2002121611A |
Foreign References:
| CN110923394A | ||||
| WO2018135351A1 |
Attorney, Agent or Firm:
Tomomachi Masatoshi
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