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Title:
METHOD FOR PRODUCING LOW-CARBON FERROMANGANESE
Document Type and Number:
WIPO Patent Application WO/2020/152945
Kind Code:
A1
Abstract:
The production of low-carbon ferromanganese by blowing an oxidizing gas onto the surface of a molten high-carbon ferromanganese bath through a top-blowing lance in a reaction vessel equipped with the top-blowing lance and a bottom blowing tuyere to decarbonize the high-carbon ferromanganese, wherein refining is carried out by blowing the oxidizing gas in such a manner that the flow rate of the oxidizing gas upon the reaching the surface of the bath can become 70 to 150 m/s inclusive. Furthermore, agitation is carried out under such a condition where the agitation power density of the gas to be blown through the bottom blowing tuyere becomes 500 W/t or more.

Inventors:
FUJII YUSUKE (JP)
SATO SHINGO (JP)
KAWABATA RYO (JP)
KIKUCHI NAOKI (JP)
SHIOTA TOSHIO (JP)
HIGUCHI IPPEI (JP)
Application Number:
PCT/JP2019/043811
Publication Date:
July 30, 2020
Filing Date:
November 08, 2019
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
MIZUSHIMA FERROALLOY CO LTD (JP)
International Classes:
C21C5/30; C21C7/00; C22C33/04
Domestic Patent References:
WO2018123808A12018-07-05
Foreign References:
JPS6447833A1989-02-22
JPS63290242A1988-11-28
JPH09157725A1997-06-17
Attorney, Agent or Firm:
GINZA MARONIE P.C. (JP)
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