Papers - OKUMURA Keiji

Effect of viscosity and surface roughness on improvement of solid-liquid wettability by ultrasonic vibration Reviewed

Keiji Okumura, Yuya Tanaka, Kazuhiko Iwai

ISIJ International   62 ( 11 )   2217 - 2224   2022.11

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DOI： https://doi.org/10.2355/isijinternational.ISIJINT-2022-268

Nonisothermal Investigation of Reaction Kinetics between Electric Arc Furnace Dust and Calcium Chloride under Carbon-Containing Conditions Reviewed

Ginji Iwase, Keiji Okumura

ISIJ International   61 ( 10 )   2483 - 2489   2021.10

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DOI： https://doi.org/10.2355/isijinternational.ISIJINT-2021-128

Recovery of Neodymium from Neodymium Magnet Using Bismuth Reviewed

A.Ishigaki,K.Okumura

Tetsu-to-Hagane   104 ( 11 )   613 - 619   2018.11

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水モデル実験における超音波振動オリフィスからのガス吹込みによる気液間反応の促進 Reviewed

奥村圭二

銅と銅合金   63 ( 1 )   263 - 267   2024.08

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Recovery of neodymium from neodymium magnets by high temperature solvent extraction by using bismuth Reviewed

Masaki YAMAGUCHI, Keiji OKUMURA

RARE EARTHS   84   100 - 101   2024.05

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Recovery of Zinc by Reaction between Electric Arc Furnace Dust and Calcium Chloride Reviewed

Hiroshi SATO, Keiji OKUMURA

Tetsu-to-Hagane   106 ( 11 )   858 - 866   2020.11

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DOI： 10.2355/tetsutohagane.TETSU-2020-032

炭材存在下での石灰石熱分解挙動 −深層学習を用いた反応性評価− Reviewed

杉浦太郎,奥村圭二

鉄と鋼   104 ( 12 )   756 - 765   2018.12

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Model Experiment for Acceleration of Lime Dissolution into Slag under Ultrasound Irradiation Conditions Invited Reviewed

Keiji Okumura

ISIJ International   57 ( 10 )   1691 - 1697   2017.10

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Solid dissolution behaviour under ultrasound irradiation conditions Reviewed

Keiji Okumura

SCANMET V   5 ( 1 )   200 - 206   2016.06

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Model experiment of solid dissolution behavior under ultrasound irradiation Reviewed

Keiji Okumura

CAMP-ISIJ   28 ( ２ )   522 - 525   2015.09

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Influence of a Large Amount of Hydrogen and Traces of Sulfur on Reaction Behavior of a Coke Mixed Bed Unfer Blast Furnace Simulated Condition Reviewed

S.Hayashi,K.Okumura,H.Suzuki,K.Shizu

Tetsu-to-Hagane   100 ( 2 )   277 - 286   2014.02

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Comprehensive reaction behavior of a coke mixed bed under blast furnace simulated conditions with a constant load Reviewed

S.Hayashi,K.Okumura,H.Suzuki,K.Shizu

Proc of ICSTI 2012   111 - 114   2012.10

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Reaction behavior of coal rich composite iron ore hot briquttes under load at high temperatures untill 1400℃ Reviewed

Y.Tanaka,T.Ueno,K.Okumura,S.Hayashi

ISIJ International   51 ( 8 )   2011.08

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Gasification reaction behavior of coal rich composite iron ore hot briquette and ferro coke Reviewed

S.Hayashi,K.Okumura

Proceedings of 8th Japan-Brazil Symposium   52 - 57   2010.09

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Model experiment for metal refining process under ultrasound irradiation condition Reviewed

K.Okumura,S.Hayashi

CAMP-ISIJ   23   827 - 830   2010.09

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Reaction behavior of coal rich composite iron ore hot briquettes under load at high temperatures Reviewed

S.Hayashi,Y.Tanaka,K.Okumura

Proceedings of ISISD2010   111 - 114   2010.09

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Enhancement of Gas-Liquid Reaction Rate with Ultrasonic Vibrating Multiple Orifices Invited Reviewed

K.Okumura,S.Hayashi

Asia Steel   S3   1 - 8   2009.05

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Development of a Novel Hot Metal Pretreatment Process with Magnesium Vapor Produced In Situ by Reduction of Wasted MgO-containing Refractory Reviewed

J.Yang,M.Kuwabara,K.Okumura,Z.Liu,M.Sano

Science and Technology of Ironmaking   259 - 262   2006.11

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Desulfurization and Deoxidation of Molten Iron with In Situ Produced Mg Vapor Reviewed

J.Yang,M.Kuwabara,Z.Liu,K.Okumura,M.Sano

Proceedings of the Second Baosteel Biennial Academic Conference   1   22 - 26   2006.05

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Development of Iron and Steel Refining Process with In Situ Produced Magnesium Vapor Reviewed

J.Yang,M.Kuwabara,Z.Liu,T.Yamasaki,K.Okumura,M.Sano

Asia Steel   470 - 475   2006.05

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Prevention of Resulfurization in Magnesium Desulfurization Process of Molten Iron Reviewed

J.Yang,M.Kuwabara,K.Okumura,Z.Liu,M.Sano

AISTech   1   663 - 674   2006.05

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その場製造したMg蒸気を利用した溶銑脱硫プロセスにおける復硫に及ぼす操作因子の影響 Reviewed

楊健,桑原守,奥村圭二,佐野正道

鉄と鋼   92 ( 4 )   246 - 253   2006.04

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Prevention of Resulfurization in Magnesium Desulfurization Process of Molten Iron Reviewed

J.Yang,M.Kuwabara,K.Okumura,Z.Liu,M.Sano

Structure, Extraction, Processing and Properties, TMS   827 - 837   2006.03

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Improvement of Desulfurization Efficiency of Molten Iron with Magnesium Reviewed

J.Yang,M.Kuwabara,K.Okumura,Z.Liu,M.Sano

International ATS Steelmaking Conference 2005   22 - 23   2005.12

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Prevention of Resulfurization in Desulfurization Process with Magnesium Vapor Produced in situ by Aluminothermic Reduction of Magnesium Oxide Reviewed

J.Yang,M.Kuwabara,K.Okumura,M.Sano

ISIJ International   45 ( 12 )   1795 - 1803   2005.12

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非等温下でのCr2O3およびFe2O3の熱炭素還元 Reviewed

奥村圭二,杉村朋子,桑原守,佐野正道

鉄と鋼   90 ( 12 )   992 - 998   2004.12

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Desulfurization of Molten Iron with Magnesium Vapor Injection Reviewed

J.Yang,K.Okumura,M.Kuwabara,M.Sano

SCANMET Ⅱ   127 - 133   2004.06

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Carbothermic and Aluminothermic Reduction of Solid Oxide Reviewed

K.Okumura

Journal of the Ceramic Society of Japan   112 ( 1 )   S1332 - S1337   2004.04

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Improvement of Desulfurization Efficiency of Molten Iron with Magnesium Vapor Produced In Situ by Aluminothermic Reduction of Magnesium Oxide Reviewed

J.Yang,K.Okumura,M.Kuwabara,M.Sano

Metallurgical and Materials Transactions B   34B ( Oct )   619 - 629   2003.10

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Iron and Steel Refining with Magnesium Vapor Injection Reviewed

M.Sano,K.Okumura,J.Shan,J.Yang

SEAISI Quarterly   32 ( 2 )   12 - 18   2003.04

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Behavior of Magnesium in the Desulfurization Process of Molten Iron with Magnesium Vapor Produced In-situ by Aluminothermic Reduction of Magnesium Oxide Reviewed

J.Yang,K.Okumura,M.Kuwabara,M.Sano

ISIJ International   42 ( 7 )   685 - 693   2002.07

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Effect of Operating Parameters on Desulfurization of Molten Iron with Magnesium Vapor Produced In-situ by Aluminotermic Reduction of Magnesia Reviewed

J.Yang,K.Okumura,M.Kuwabara,M.Sano

ISIJ International   42 ( 6 )   595 - 602   2002.06

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マグネシアのアルミニウム熱還元反応を用いたその場製造マグネシウム蒸気による溶鉄の脱酸 Reviewed

単佳義,奥村圭二,桑原守,佐野正道

鉄と鋼   88 ( 6 )   595 - 602   2002.06

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マグネシウム蒸気吹込みによる溶鉄の脱酸におけるノズル閉塞挙動 Reviewed

単佳義,奥村圭二,桑原守,佐野正道

鉄と鋼   88 ( 5 )   256 - 263   2002.05

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Iron and Steel Refining with Magnesium Vapor Produced In-situ by Reduction of Magnesium Oxide Reviewed

M.Sano,K.Okumura,J.Shan,J.Yang

13th LAS Steelmaking Seminar and 3rd ISS Argentina Section Meeting   397 - 404   2001.11

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マグネシアの炭素熱還元反応を用いたその場製造マグネシウム蒸気による溶鉄の脱酸 Reviewed

単佳義,奥村圭二,桑原守,佐野正道

鉄と鋼   87 ( 10 )   635 - 642   2001.10

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Desulfurization of Molten Iron with Magnesium Vapor Produced In-Situ by Aluminothermic Reduction of Magnesium Oxide Reviewed

J.Yang,K.Okumura,M.Kuwabara,M.Sano

ISIJ International   41 ( 9 )   965 - 973   2001.09

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Desulfurization of Molten Iron with Magnesium Vapor Produced In-Situ by Carbothermic Reduction of Magnesium Oxide Reviewed

J.Yang,S.Ozaki,R.Kakimoto,K.Okumura,M.Kuwabara,M.Sano

ISIJ International   41 ( 9 )   945 - 954   2001.09

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Iron and Steel Refining with Magnesium Vapor In-situ Produced by Reduction of Magnesia Reviewed

M.Sano,K.Okumura,J.Shan,J.Yang

2nd International congress on the Science & Technology of Steelmaking   585 - 592   2001.04

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Gas Dispersion Phenomena and Mixing Characteristics under Gas Injection through Slot Nozzle Submerged in Water Reviewed

K.Okumura,M.Sano

ISIJ International   41 ( 3 )   234 - 238   2001.03

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Deoxidation and Desulfurization of Molten Iron with Magnesium Vapor In-situ Produced by Carbothermic Reduction of Magnesium Oxide Reviewed

K.Okumura,J.Shan,J.Yang,M.Sano

2nd International Conference on Processing Materials for Properties   597 - 602   2000.11

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Desulfurization of Molten Iron with Magnesium Vapor In-situ Produced by Carbothermic Reduction of Magnesium Oxide Reviewed

J.Yang,K.Okumura,M.Sano

Asia Steel   80 - 85   2000.09

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Nonisothermal Gravimetric Investigation on Kinetics of Reduction of Magnesia by Carbon and Aluminum Reviewed

K.Okumura,L.Hong,M.Sano

Processing Materials for Properties, TMS   559 - 564   2000.09

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Gas injection from Slot Nozzles with Various Shapes in Water Reviewed

ISIJ International   40 ( 6 )   544 - 548   2000.06

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Gas Dispersion Phenomena and Mixing Characteristics under Gas Injection Through Slot Nozzle Submerged in Water Reviewed

Asia Steel   C   315 - 319   2000.04

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Deoxidation of Molten Iron with Magnesium Vapor In-situ Produced by Carbothermic Reduction of Magnesium Oxide Reviewed

Asia Steel   C   94 - 98   2000.04

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Desulfurization of Molten Iron with Magnesium Vapor In-situ Produced by Carbothermic Reduction of Magnesium Oxide Reviewed

C   80 - 85   2000.04

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Nonisothermal Gravimetric Investigation on Kinetics of Reduction of Magnesia by Aluminum Reviewed

Metallurgical and Materials Transactions B   30B ( Dec )   1003 - 1008   1999.12

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Bubble Formation from Nonwetted Slot Nozzles Reviewed

Canadian Metallurgical Quartarly   37 ( 1 )   49 - 56   1998.01

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Bubble Formation from Non-wetted Slot Nozzles Reviewed

Proc. Int. Symp. Metall. and Mat. of Non-Ferrous Met. and Alloys.   93 - 104   1996.04

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Bubble Formation from Non-wetted Slot Nozzle Reviewed

Challenges in Process Intensification, CIM   23 - 34   1996.04

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Effect of Initial Oxygen Concentration on the Rate of SiO2 Inclusion Removal from Molten Cu Reviewed

ISIJ International   36 ( 1 )   1 - 6   1996.01

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Rate of Indusion Removal from Molten Metal to Slag with Injecting Gas from Multi-Orifice and Multi-Nozzle Reviewed

Journal of The Iron and Steel Institute of Japan   81 ( 12 )   1126 - 1131   1995.12

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Rate of SiO2 Inclusion Removal from Molten Cu to Slag under Gas Injection Stirring Condition Reviewed

ISIJ International   35 ( 7 )   831 - 837   1995.07

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Rate of SiO2 Inclusion Removal from Molten Cu to Slag under Mechanical Stirring Condition Reviewed

ISIJ International   35 ( 7 )   826 - 831   1995.07

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Effect of Initial Total Oxygen Concentration on the Rate of SiO2 Inclusion Removal from Molten Cu Reviewed

Journal of The Iron and Steel Institute of Japan   80 ( 7 )   539 - 544   1994.07

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Rate of SiO2 Inclusion Removal from Molten Cu to Slag Under Gas Injection Stirring Condition Reviewed

Journal of The Iron and Steel Institute of Japan   80 ( 3 )   201 - 206   1994.03

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Rate of SiO2 Inclusion Removal from Molten Cu to Slag under Mechanical Stirring Condition Reviewed

Journal of The Iron and Steel Institute of Japan   80 ( 2 )   107 - 112   1994.02

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Kinetics of Removal of Inclusion from Molten Metal Reviewed

Processing Materials for Properties, TMS   313 - 316   1993.04

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Effect of Stirring on the Rate of Inclusion Removal Reviewed

CLEAN STEEL 4   3   672 - 690   1992.04

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Removal of Inclusion Particles from Molten Metal with Gas Injection Reviewed

Multiphase Flows   2   395 - 398   1991.04

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Effect of Stirring on the Rate of Inclusion Removal from Molten Metal Reviewed

Proc. 6th Int. Iron and Steel Congr.   3   568 - 575   1990.04

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Theoretical Analysis and Model Experiment on Thermosolutal Convection during Unidirectional Solidification in the Vertical Direction Reviewed

Journal of The Iron and Steel Institute of Japan   75 ( 4 )   618 - 625   1989.04

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