Dissolution behavior of Fe from glassy oxides phase in steelmaking slag

Shohei Koizumi, Xu Gao, Shigeru Ueda, Shin ya Kitamura

研究成果: Conference contribution

5 被引用数 (Scopus)

抄録

Steelmaking slag was confirmed to be a useful fertilizer for paddy growth as it efficiently supplies Ca and Si to soil water. In addition, supplement of Fe from slag fertilizer has been expected to suppress the H2S generation in paddy soil, especially for the degraded paddy soil. However, on the basis of our previous research, the Fe dissolution ability changed with slag brands, and even some brands could dissolve Fe under paddy soil pH, the supplying ability were not high. To improve Fe dissolution, we found that among various kinds of Fe-rich mineralogical phases in slag, the CaO–SiO2–FeO glassy phase showed highest water solubility of Fe. Because the CaO–SiO2–FeO glassy phase was a quenched molten phase, its dissolution behavior may depend on chemical composition, and this is important for controlling slag composition to produce fertilizer which can easily release Fe. Therefore, in this research, the CaO–SiO2–FeO glassy phase of various CaO/SiO2 ratio, Fe2+/T–Fe ratios, and FeO contents were synthesized, and the dissolution behaviors of Fe as well as other cations from these synthetic glassy phases into an aqueous solution at pH of 5 were investigated. The result showed that the dissolution ratio of Fe increased significantly by increasing Fe2+/T–Fe ratio. An increase in FeO content of glassy phase also increased the dissolution of Fe. In addition, the Fe dissolution ratio showed a local maximum with increasing CaO/SiO2 ratio.

本文言語English
ホスト出版物のタイトル8th International Symposium on High-Temperature Metallurgical Processing, 2017
編集者Jiann-Yang Hwang, Mark William Kennedy, Varadarajan Seshadri, Baojun Zhao, Dean Gregurek, Tao Jiang, P. Chris Pistorius, Ender Keskinkilic, Onuralp Yucel
出版社Springer International Publishing
ページ395-401
ページ数7
ISBN(印刷版)9783319513393
DOI
出版ステータスPublished - 2017 1 1
イベント8th International Symposium on High-Temperature Metallurgical Processing, in conjunction with the TMS Annual Meeting and Exhibition, 2017 - San Diego, United States
継続期間: 2017 2 262017 3 2

出版物シリーズ

名前Minerals, Metals and Materials Series
Part F5
ISSN(印刷版)2367-1181
ISSN(電子版)2367-1696

Other

Other8th International Symposium on High-Temperature Metallurgical Processing, in conjunction with the TMS Annual Meeting and Exhibition, 2017
国/地域United States
CitySan Diego
Period17/2/2617/3/2

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • エネルギー工学および電力技術
  • 材料力学
  • 金属および合金
  • 材料化学

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