Title:
直流アーク式電気炉による高純度鋼の製造方法
Document Type and Number:
Japanese Patent JP6413710
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To produce low sulfur-low nitrogen high purity steel in one refining container by a ferrous raw material using an arc type electric furnace.SOLUTION: Provided is a method for producing a high purity steel by an electric arc furnace where the electrode of a direct current arc type electric furnace is made into hollow, while feeding a hydrogen carbide gas through the hollow part, one or more kinds of ferrous raw materials including 50% or more of iron ore, reduced iron, scrap or the like are dissolved, the carbon concentration in the molten iron after melt-down is controlled to the carbon concentration to the ferrous raw materials or higher, thereafter, an oxygen gas is blown into the molten iron, and decarburization treatment is performed.SELECTED DRAWING: Figure 1
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| WO/1993/024662 | MELTING A MIXTURE OF SCRAP METAL USING SCRAP RUBBER |
| JPS6148453 | USE OF STEEL SLAG |
Inventors:
Yuji Ogawa
Application Number:
JP2014244095A
Publication Date:
October 31, 2018
Filing Date:
December 02, 2014
Export Citation:
Assignee:
Nippon Steel & Sumitomo Metal Corporation
International Classes:
C21C5/52; F27B3/08; F27D3/16; F27D17/00
Domestic Patent References:
| JP52147513A | ||||
| JP53043003A | ||||
| JP48000362B1 |
Foreign References:
| WO2003037038A2 |
Attorney, Agent or Firm:
Takayoshi Kokubun