| Project/Area Number |
09450277
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Metal making engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
NAGATA Kazuhiro Tokyo Institute of Technology, 大学院・理工学研究科, Professor (70114882)
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| Co-Investigator(Kenkyū-buntansha) |
SUSA Masahiro Tokyo Institute of Technology, 大学院・理工学研究科, Associate Professor (90187691)
FUKUYAMA Hiroyuki Tokyo Institute of Technology, 大学院・理工学研究科, Associate Professor (40252259)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥13,000,000 (Direct Cost: ¥13,000,000)
Fiscal Year 1998: ¥6,500,000 (Direct Cost: ¥6,500,000)
Fiscal Year 1997: ¥6,500,000 (Direct Cost: ¥6,500,000)
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| Keywords | Tatara / iron sand / reaction mechanisms / steelmaking / new ironmaking / 炉内反応 / 製錬 / ケラ / ノロ |
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| Research Abstract |
The mechanisms of "Tatara Steelmaking" which was a Japanese traditional ironmaking process has been investigated and studied for a new ironmaking process. (1) The compact "Tatara Furnaces" for making steel blooms or liquid pig iron was constructed and (2) 14 runs were carried out. (3) Temperature and oxygen potential were monitored during ironmaking and steelmaking by thermocouole and oxygen sensor. Also, the composition of steels, pig irons and slags were chemically analyzed. (4) The conventional "Tatara" which is operated 4 times in winter season has been studied on its operation way. (5) From above studies, the following results were obtained; The characteristics of "Tatara" steelmaking is the operation at low temperature of about 1350℃ and high oxygen potential of about 1x10^<-12>atm under rapid heating and reaction. The carbon contents in steel bloom and pig iron are about 1.5% and about 3.5%, respectively and the silicon content is almost trace. This indicates that the ironmaking reaction in "Tatara" is not in thermodynamic equilibrium. (6) Then, for developing a new ironmaking process, a pellet composed of iron ore and coal was examined for producing liquid pig iron at 1350℃ during 8 minutes under rapid heating and reaction.
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