New Ironmaking Method at Lower Temperature and Higher Oxygen Potential

低温高氧势炼铁新方法

• 批准号: 11355031
• 负责人: NAGATA Kazuhiro
• 金额: $ 23.37万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11355031/
• 关键词: pig iron; low temperature; high oxygen potential; pellet; melting; reduction; meiting; high oxygenpotential; Pellet

Magnetite pellets bearing coal powder were rapidly heated in Ar atmosphere at an elevated temperature. They were reduced and then melted to be molten pig iron during 10 to 15 minutes at the lowest temperature of 1350℃. At the end of reduction, oxygen potential in a pellet was about 1x10^<-14> atm and then phospher and sulfer contents were very low. The same results were obtained for using the mixture of iron ore and coal powders in a alumina crucible.Reaction between graphite and iron proceeded more rapidly to produce molten pig iron than carburization and melting of iron by CO gas.Insite observations of reduction of iron ore mixed with graphite powder were carried out using High temperature X-ray difractometer. When iron ore and graphite powders were milled together and the diameter of graphite was les than 10 μm, the starting temperature of reduction from Fe203 to Fe304 decreased.Single crystal of FeO was deduced by Ar-CO gas mixture and formed thin layer of Fe on the surface. The rate of iron layer formation made rapid higher temperature than 1050℃ and was cyclically proceeded and stopped under the lower partial pressure of CO gas.As the traditional process of lower temperature ironmaking, "Tatara" furnace was investigated.

在升高的温度下，在AR大气中迅速加热了带有煤粉的磁铁矿颗粒。它们在10至15分钟内融化，然后在1350℃的最低温度下熔化为熔融生铁。在还原结束时，沉淀中的氧势为约1x10^<-14> atm，然后磷脂和硫含量非常低。在氧化铝坩埚中使用铁矿石和煤粉的混合物获得了相同的结果。石墨和铁之间的反应更快地产生了比化石和通过CO气体对铁熔化的熔融生产的。当铁矿石和石墨粉被铣削在一起并且石墨直径比10μm时，从Fe203到Fe304的降低温度降低。FeO的单晶晶体通过AR-CO气体混合物推导，并在表面上形成Fe的薄层。铁层形成的速率比1050℃的快速温度更高，并在CO气体的较低部分压力下进行了周期性处理并停止。随着传统的较低温度熨斗的过程，“ Tatara”炉进行了研究。

项目成果

T.Murakami.H.Fukuyama and K.Nagata: "Mechanism of Carburizing Followed by Melting of Iron by COGas"材料とプロセス. 13. 981 (2000)

T. Murakami. H. Fukuyama 和 K. Nagata：“COGas 熔化铁后的渗碳机理”，材料与工艺，13. 981 (2000)。

村上太, 福山博之, 永由和宏: "鉄表面におけるCOガス浸炭による液相生成機構"材料とプロセス. 14. 84 (2001)

Futoshi Murakami、Hiroyuki Fukuyama、Kazuhiro Nagayoshi：“铁表面 CO 气体渗碳的液相形成机制”材料与工艺。

K.Nagata. A.Hniu and T.Suzuki: "Role of "Kobune" in Underground Construction of Tatara Furnace"Tetsu-to-Hagane. 87. 665-672 (2001)

K.永田。

村上 太一、福山 博之、須佐 匡裕、永田 和宏: "鉄の浸炭・融解反応に及ぼす表面状態の影響"材料とプロセス. 12. 771 (1999)

Taichi Murakami、Hiroyuki Fukuyama、Masahiro Susa、Kazuhiro Nagata：“表面条件对铁的渗碳和熔化反应的影响”材料和工艺。12. 771 (1999)

T.Murakami,H.Fukuyama and K.Nagata: "Mechanism of Carburizing and Melting Iron by CO Gas"Iron and Steel Institute of Japan. 41(In press). (2001)

T.Murakami，H.Fukuyama和K.Nagata：“CO气体渗碳和熔化铁的机理”日本钢铁研究所。