| Project/Area Number |
01550523
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
金属精錬・金属化学
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| Research Institution | Kyushu University |
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Principal Investigator |
MURAYAMA TAKEAKI Kyushu University, Engineering, Associate Professor, 工学部, 助教授 (40112312)
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| Co-Investigator(Kenkyū-buntansha) |
KUWANO ROKURO Kyushu University, Engineering, Research Associate, 工学部, 助手 (60037794)
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| Project Period (FY) |
1989 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1990: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1989: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Carbon / Cement-Bonded Cole Pellet / Reduction / Solution Loss Reaction / Variation of Pressure / Variation of Temperature / Cement / Rate of Reaction / セメント |
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| Research Abstract |
The reduction of cement-bonded cold pellet at 1100^ﾟC in nitrogen ro carbon monoxide gas stream was investigated experimentally and theoretically. The pellets were made from hematite powder, carbon and cement mixtures. The effects of hematite particle size, hematite/carbon ratio, gas flow rate, and the kind of gas on degree of metallization were studied. The pressure and the temperature in the pellet were measured during the reaction. The results were summarized as follows.
1) Reaction rate increased with increase of carbon content.
2) The temperature in the pellet was lower about 100 degrees than bulk gas temperature during reaction.
3) The maximum pressure in the pellet was about 400mmH_2O higher than bulk pressure during the reaction.
4) In N_2 atmosphere, reaction rate decreased with increase of flow rate and the reaction stopped before disappearance of carbon and hematite.
5) On the other hand, in CO atmosphere, reaction rate increased with increase of gas flow rate.
6) The carbon oxidation control model could not explain the experimental results.
7) The grain model considering gaseous reduction of iron oxide, carbon solution loss reaction, gaseous diffusion in the pellet, and mass transfer in the gas film represented the tendency of the experimental results.
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