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Title: 鉄鉱石の焼結プロセスで生成したダスト中の炭素と塩素の化学形態
Other Titles: Functional Forms of Carbon and Chlorine in Dust Samples Formed in the Sintering Process of Iron Ores
Authors: 坪内, 直人1 Browse this author →KAKEN DB
葛西, 栄輝2 Browse this author
川本, 克也3 Browse this author
野田, 英俊4 Browse this author
中里, 嘉浩5 Browse this author
大塚, 康夫6 Browse this author
Authors(alt): Tsubouchi, Naoto1
Kasai, Eiki2
Kawamoto, Katsuya3
Noda, Hidetoshi4
Nakazato, Yoshihiro5
Ohtsuka, Yasuo6
Keywords: iron ore sintering
unburned carbon
chlorine forms
carbon forms
organic chlorine compounds
Issue Date: Oct-2005
Publisher: 日本鉄鋼協会
Journal Title: 鉄と鋼
Volume: 91
Issue: 10
Start Page: 751
End Page: 756
Publisher DOI: 10.23550/tetsutohagane1955.91.10-751
Abstract: The chemical forms of the carbon and chlorine present in dust samples obtained from windboxes of the iron are sintering machine have been studied with X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The chlorine in the dust samples is present as KCl with the average crystalline size of 40-50 nm and covalent C-Cl bonds in condensed aromatic structures of unburned carbon surface. The proportion of chlorinated aromatic structures increases almost linearly with increasing that of surface oxygen complexes on unburned carbon, strongly suggesting that active surface sites of the carbon formed in the sintering process work as reaction sites with HCl and Cl2. Model experiments using a coke show that HCl reacts with it at 500°C to form several types of Cl-functional forms, from which the HCl desorption takes place at the wide range of 500-900°C upon reheating. Such a profile for HCl formation is almost unchanged after washing of the HCl-treated coke by water. These observations indicate the formation of organic chlorides. It is therefore likely that HCl and Cl2 evolved in the combustion process react with active sites of unburned carbon surface to form organic chlorine compounds.
Rights: 著作権は日本鉄鋼協会にある
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 坪内 直人

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