Title:
MANUFACTURING METHOD OF FERRONICKEL
Document Type and Number:
Japanese Patent JP2023136438
Kind Code:
A
Abstract:
To maintain quality of ferronickel appropriate even when calcium oxide is used as a desulfurizing agent for removing sulfur from rough ferronickel melt in a pyrometallurgical method for producing ferronickel.SOLUTION: A manufacturing method of ferronickel comprises: a reduction melting step S1 in which nickel oxide ore is reduced in a melting furnace to obtain a crude ferronickel melt having a nickel grade of 14 mass% or more and a silicon grade of 3% or less; and a desulfurization step S2 of charging a desulfurization agent in the crude ferronickel melt to remove sulfur, in the desulfurization step S2, a silicon quality control treatment st1 wherein calcium oxide is used as the desulfurization agent to maintain a Si/CaO ratio in the crude ferronickel melt at a predetermined control value is performed in advance the desulfurization step S2.SELECTED DRAWING: Figure 1
Inventors:
MORI AKINOBU
YAMAGUCHI MASAHIRO
KAWANAKA KAZUAKI
YAMAGUCHI MASAHIRO
KAWANAKA KAZUAKI
Application Number:
JP2022042103A
Publication Date:
September 29, 2023
Filing Date:
March 17, 2022
Export Citation:
Assignee:
HYUGA SMELTING
International Classes:
C22B23/02; C22B5/02; C22C1/00; C22C33/04
Attorney, Agent or Firm:
Masayuki Shobayashi
Kazuyoshi Hayashi
Kazuyoshi Hayashi
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