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Featured researches published by Hideki Ono-Nakazato.


Mineral Processing and Extractive Metallurgy Review | 2003

GASEOUS REDUCTION BEHAVIOR OF IRON OXIDE IN MINERAL PHASES AND IN CaO-SiO2-FeO SLAG POWDER

Hideki Ono-Nakazato; Tateo Usui; Nobufumi Kitamura; Youhei Tsubone

To elucidate the gaseous reduction behavior of iron ore sinter, it is necessary to know the effect of SiO2, which is contained in the ore as a gangue mineral, and to know the reducibility of FeO in solidified CaO-SiO2-FeO slag. In the present study, the gaseous reduction behavior of the CaO-SiO2-FeO slag, 2FeO·SiO2, and CaO·FeO·SiO2 powder has been investigated, and the rate constants of hydrogen reduction are derived to be about 0.4 and 0.6 mol/(s·m3·atm) for 2FeO·SiO2 and CaO·FeO·SiO2, respectively. The rate constants for the reduction of 2FeO·SiO2 and CaO·FeO·SiO2 with CO are one order of magnitude smaller than with H2.


Isij International | 2005

Complex deoxidation equilibria of molten iron by aluminum and calcium

Kenji Taguchi; Hideki Ono-Nakazato; Tateo Usui; Katsukiyo Marukawa; Ken Katogi; Hiroaki Kosaka


Isij International | 2003

Effect of Water-Gas Shift Reaction on Reduction of Iron Oxide Powder Packed Bed with H2-CO Mixtures

Hideki Ono-Nakazato; Toshinari Yonezawa; Tateo Usui


Isij International | 2003

Deoxidation and Desulfurization Equilibria of Liquid Iron by Calcium

Kenji Taguchi; Hideki Ono-Nakazato; Daisuke Nakai; Tateo Usui; Katsukiyo Marukawa


Isij International | 2006

Liquid Immiscibility in Fe-Cu-B-C System

Kenji Taguchi; Hideki Ono-Nakazato; Tateo Usui


Isij International | 2003

Effect of Surface Concentration of Alloying Elements on Nitrogen Dissolution Rate in Molten Iron Alloys

Hideki Ono-Nakazato; Tomotsugu Koyama; Tateo Usui


Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science | 2001

Determination of standard gibbs energies of formation of Cr2N and CrN

Hideki Ono-Nakazato; Kenji Taguchi; Tateo Usui; Keishi Tamura; Yuuji Tomatsu


Isij International | 2003

Mechanism of dioxins/furans formation at high temperature in combustion processes

Hirotoshi Kawabata; Tateo Usui; Katsukiyo Marukawa; Shigeta Hara; Toshihiro Tanaka; Hideki Ono-Nakazato


Isij International | 2002

Fundamental Experiments on the H2 Gas Injection into the Lower Part of a Blast Furnace Shaft

Tateo Usui; Hirotoshi Kawabata; Hideki Ono-Nakazato; Atsushi Kurosaka


Isij International | 2001

Oxidation Behavior of Silicon and Carbon in Molten Iron-Carbon-Silicon Alloys with Carbon Dioxide

Hideki Ono-Nakazato; Yukiyo Morita; Keishi Tamura; Tateo Usui; Katsukiyo Marukawa

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