Thermal decomposition of chrysotile-containing wastes in a water vapor atmosphere
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- KOZAWA Takahiro
- Research Laboratory of hydrothermal Chemistry, Faculty of Science, Kochi University
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- ONDA Ayumu
- Research Laboratory of hydrothermal Chemistry, Faculty of Science, Kochi University
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- YANAGISAWA Kazumichi
- Research Laboratory of hydrothermal Chemistry, Faculty of Science, Kochi University
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- CHIBA Osamu
- Technical Research Institute, Toda Co.
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- ISHIWATA Hiroyuki
- Technical Research Institute, Nishimatsu Construction Co., Ltd.
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- TAKANAMI Tetsuro
- Division of Environmental Engineering, Daioh Shinyo Co., Ltd.
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A simple thermal decomposition technique to convert asbestos-containing wastes (ACWs) into non-asbestos products has been developed by heating ACWs in a water vapor atmosphere. It was confirmed that cement slates containing 18 mass % chrysotile were converted into non-asbestos products by the thermal treatment in a water vapor atmosphere at 800°C for 2 h. In contrast, the thermal treatments in air required temperatures as high as 900°C to convert the cement slates into non-asbestos products. It should be noted that any chrysotile particles were not detected by the phase-contrast microscopic observation in the products after the thermal treatments in a water vapor atmosphere at temperatures beyond 800°C but three or less chrysotile particles remained after the thermal treatments in air at high temperatures beyond 900°C. In a water vapor atmosphere, ACWs were successfully converted into non-asbestos products at low temperatures below 800°C for 2 h by accelerated solid-state reactions between decomposed products of chrysotile and cement components to form calcium magnesium silicates. This technique may contribute to large-scale decomposition of ACWs with low energy consumption in comparison with the traditional melting method.
収録刊行物
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 118 (1384), 1199-1201, 2010
公益社団法人 日本セラミックス協会
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詳細情報 詳細情報について
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- CRID
- 1390001205285685888
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- NII論文ID
- 130000420816
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- NII書誌ID
- AA12229489
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- ISSN
- 13486535
- 18820743
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- NDL書誌ID
- 10901484
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可