Title:
METAL MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2023080726
Kind Code:
A
Abstract:
To provide a metal manufacturing method which effectively reduces phosphorus from a metal oxide containing phosphorus at low cost in a short time by one-stage reduction treatment.SOLUTION: A metal manufacturing method includes reacting a metal oxide containing phosphorus used in a main raw material or an auxiliary raw material for metal smelting or metal refining with reducing gas containing nitrogen under adjustment of a treatment temperature, an oxygen partial pressure and a nitrogen partial pressure, performing reduction treatment for reducing the metal oxide while removing phosphorus in the metal oxide as gas, and making metal. The reduction treatment is preferably performed such that a melting point of the metal oxide is represented by Tm(°C), a treatment temperature T(°C) is set to be within a range of 750°C to 0.95×Tm(°C), an oxygen partial pressure PO2(atm) of the reducing gas satisfies the following condition, and a nitrogen partial pressure PN2(atm) of the reducing gas is set to be within a range of 0.2 atm to 0.9 atm. Expression: logPO2≤-1.45×10-5T2+0.0479T-48.2.SELECTED DRAWING: Figure 1
Inventors:
MINAMITANI KAZUYA
NAKASE KENJI
NAKAI YOSHIE
KIKUCHI NAOKI
NAKASE KENJI
NAKAI YOSHIE
KIKUCHI NAOKI
Application Number:
JP2021194222A
Publication Date:
June 09, 2023
Filing Date:
November 30, 2021
Export Citation:
Assignee:
JFE STEEL CORP
International Classes:
C22B5/12; C21B13/00; C22B47/00
Attorney, Agent or Firm:
Patent Attorney Ginza Maronnier Patent Office