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ID 46903
フルテキストURL
著者
Nanba, Tokuro Graduate School of Environmental Science, Okayama University
Mikami, Shuhei Graduate School of Environmental Science, Okayama University
Imaoka, Takuya Graduate School of Environmental Science, Okayama University
Sakida, Shinichi Health and Environment Center, Okayama University
Miura, Yoshinari Graduate School of Environmental Science, Okayama University
抄録
A chemical recycling process using phase separation of glass was applied to a granulated blast furnace slag with high CaO content. Glasses were prepared by adding B(2)O(3) to the slag in order to promote phase separation, and the glasses were heat-treated above glass transition temperature. In the subsequent acid-treatment, however, gelation due to the elution of SiO(2) phase containing CaO occurred, not obtaining high SiO(2) solids. Then, pretreatment was introduced to reduce CaO content in slag, where the raw slag was briefly washed in acid. The slag glasses prepared from the pretreated slag were commonly phase-separated by heat-treatment regardless of B(2)O(3) content. After subsequent acid-treatment, colorless insoluble solids were successfully recovered. The end products consist of 70-90 mass% SiO(2), and coloring ions such as Mn, Fe and Cr were almost completely removed from the slag glasses. Reutilization as raw materials for glass is expected.
キーワード
Blast furnace slag
Waste recycling
Chemical recycling
Phase separation
Glass
発行日
2008-02
出版物タイトル
Journal of the Ceramic Society of Japan
116巻
1350号
出版者
The Ceramic Society of Japan
出版者(別表記)
公益社団法人日本セラミックス協会
開始ページ
220
終了ページ
223
ISSN
1882-0743
NCID
AA12229489
資料タイプ
学術雑誌論文
言語
English
著作権者
©2008 The Ceramic Society of Japan
論文のバージョン
publisher
査読
有り
DOI