Title:
酸化マンガン含有物質の脱リン処理方法、低リン含有酸化マンガン含有物質の製造方法および該酸化マンガン含有物質を用いる鋼の製造方法
Document Type and Number:
Japanese Patent JP7067532
Kind Code:
B2
Abstract:
To provide a method for reducing phosphorus from a manganese oxide-containing substance containing phosphorus.SOLUTION: A dephosphorization method of a manganese oxide-containing substance includes heating a manganese oxide-containing substance to a temperature in a non-molten state and making the manganese oxide-containing substance react with nitrogen-containing gas at a nitrogen partial pressure of more than 0.15 atm and less than 0.95 atom and thereby nitride-removing phosphorus in the manganese oxide-containing substance. A low phosphorus-containing manganese oxide-containing substance is a manganese oxide-containing substance treated according to the dephosphorization method of the manganese oxide-containing substance, and the manganese oxide-containing substance has a content of a phosphorus oxide (P2O5) of 0.2 mass% or less. A method for manufacturing steel manufactures steel using a manganese ore subjected to the dephosphorization or a combusted product of the manganese ore as a raw material in at least one of blast furnace refining and steel-making refining.SELECTED DRAWING: Figure 4
Inventors:
Naoki Kikuchi
Kenji Nakase
Yui Nakai
Kenji Nakase
Yui Nakai
Application Number:
JP2019117254A
Publication Date:
May 16, 2022
Filing Date:
June 25, 2019
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C22B1/00
Domestic Patent References:
| JP53134794A | ||||
| JP56075507A |
Foreign References:
| CN101302586A |
Attorney, Agent or Firm:
Ginza Marronnier Patent Office