| Project/Area Number |
16360375
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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 | KYUSHU UNIVERCITY |
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Principal Investigator |
SHIMUZU Masakata Kyushu University, Faculty of Engineering, Professor, 大学院工学研究院, 教授 (30325500)
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| Co-Investigator(Kenkyū-buntansha) |
NISHIOKA Koki Kyushu University, Faculty of Engineering, Assistant Professor, 大学院工学研究院, 助教授 (80294891)
MAEDA Takayuki Kyushu University, Faculty of Engineering, Research Associate, 大学院工学研究院, 助手 (50150496)
NAKAGAWA Hiroshi Kyushu University, Faculty of Engineering, Research Associate, 大学院工学研究院, 助手 (80260719)
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| Project Period (FY) |
2004 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥7,700,000 (Direct Cost: ¥7,700,000)
Fiscal Year 2006: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2005: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2004: ¥5,400,000 (Direct Cost: ¥5,400,000)
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| Keywords | Iron ore / Gasification rate / Reduction rate / Coal / Hematite / Magnetite / 酸化鉄 / 揮発性還元ガス |
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| Research Abstract |
Carbon composite iron ore agglomerates were made from two kinds of iron ores that are hematite and magnetite and three kinds of coals with different fluidity by using a cold bond method and using flour as a binder. The effects of raw materials property such as oxidation degree of iron ore and fluidity of coal on the texture of carbon composite iron ore agglomerate were investigated The following results were obtained.
(1)From the microscopic observation of samples that was pre-heated at 500℃ in N2 gas stream, it was found that iron ore was surrounded by fused coal and large pore was existed in the sample using large fluidity coal. On the other hand, it was found that the particles of coal were remained without fusing and pore was existed between coal and iron ore in the sample using non-fluidity coal.
(2)The thermal diffusivity of sample using hematite ore was larger than that of sample using magnetite ore because the thermal diffusivity of hematite ore was larger than that of magnetite
… More
ore. The thermal diffusivity of sample using fluidity coal was larger than that of sample using non-fluidity coal. The heat path of sample using fluidity coal became thick because the contact between coal and ore became facet contact when the fluidity coal was used, and it is was thought that the thermal diffusivity of sample using fluidity coal became large.
(3)The reaction rate of sample using hematite ore became larger than that of sample using magnetite ore, and it became large using fluidity coal. The gasification rate was influenced by experimental temperature greatly and it increased with increasing the temperature. The gasification rate was very slow at 900℃ and the gasification reaction was retarded at this temperature because the CO_2 gas that was necessary for gasification reaction disappeared. Moreover, the reduction reaction at that temperature was retarded at an early stage because the CO gas was not generated. The reduction reaction and gasification reaction were proceeded immediately at 1200℃ because CO_2 gas generated by reduction reaction was used for gasification reaction effectively as the gasification rate was very fast. Less
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