Koki Nishioka
Kyushu University
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Publication
Featured researches published by Koki Nishioka.
Journal of Sustainable Metallurgy | 2016
Koki Nishioka; Yutaka Ujisawa; Shigeaki Tonomura; Natsuo Ishiwata; Peter Sikström
COURSE50 (CO2 Ultimate Reduction in Steelmaking process by innovative technology for cool Earth 50) aims to increase the proportion of hydrogen reduction in the blast furnace. This objective raises the key issue of heat balance changes in individual regions as well as in the overall blast furnace. In order to compensate for the endothermic reactions of hydrogen, a decrease in direct reduction by carbon, a huge endothermic reaction, is being executed. Among the various hydrogen sources available in the industry, coke oven gas (COG) was chosen because of its availability and stability. However, COG requires reforming for it to be injected into the shaft of the blast furnace because this zone cannot combust the hydrocarbon components of COG. COURSE50 has carried out successful COG and reformed COG injection trials at LKAB’s experimental blast furnace in Luleå, Sweden, in cooperation with LKAB and Swerea MEFOS. Carbon consumption in both the COG and reformed COG injection periods decreased compared with the base period because of the planned increase in hydrogen reduction instead of direct reduction by carbon. These results indicate the possibility of increasing the amount of hydrogen reduction in the blast furnace.
Isij International | 2011
Nobuyuki Oyama; Yuji Iwami; Tetsuya Yamamoto; Satoshi Machida; Takahide Higuchi; Hideaki Sato; Michitaka Sato; Kanji Takeda; Yoshinori Watanabe; Masakata Shimizu; Koki Nishioka
Isij International | 2006
Koki Nishioka; Takayuki Maeda; Masakata Shimizu
Fuel | 2013
Yasuaki Ueki; Ryo Yoshiie; Ichiro Naruse; Ko Ichiro Ohno; Takayuki Maeda; Koki Nishioka; Masakata Shimizu
Isij International | 2005
Takayuki Maeda; Chieko Fukumoto; Toshihide Matsumura; Koki Nishioka; Masakata Shimizu
Isij International | 2007
Koki Nishioka; Takeshi Taniguchi; Yasuaki Ueki; Ko Ichiro Ohno; Takayuki Maeda; Masakata Shimizu
Isij International | 2007
Naoyuki Takeuchi; Youhei Nomura; Ko Ichiro Ohno; Takayuki Maeda; Koki Nishioka; Masakata Shimizu
Isij International | 2004
Takayuki Maeda; Koki Nishioka; Kunihiko Nakashima; Masakata Shimizu
Isij International | 2002
Koki Nishioka; Takayuki Maeda; Masakata Shimizu
Isij International | 2005
Koki Nishioka; Takayuki Maeda; Masakata Shimizu