Low-Temperature Decomposition of Sprayed-on Asbestos

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  • FUJISHIGE Masao
    Department of Chemistry and Materials Science, Institute of Gunma National College of Technology
  • SATO Ryota
    Advanced Environmental Engineering Course, Institute of Gunma National College of Technology
  • KURIBARA Ayano
    Department of Chemistry and Materials Science, Institute of Gunma National College of Technology
  • KARASAWA Ikuko
    Department of Chemistry and Materials Science, Institute of Gunma National College of Technology
  • KOJIMA Akira
    Department of Chemistry and Materials Science, Institute of Gunma National College of Technology

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  • 吹付けアスベストの低温分解

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Abstract

Low-temperature decomposition of sprayed-on asbestos was studied in the presence of flon-decomposition products or CaCl2-CaCO3 mixtures. In a reaction system to which flon-decomposition products were added, chrysotile and its decomposition product, forsterite, maintaining the needle form underwent destruction by heating at 800°C for 2 h. The optimum mixing ratio of the sprayed-on asbestos to the flon-decomposition product was obtained when the content of the latter was very slightly larger than that for the asbestos/flon-decomposition product ratio 2/1 by weight. When the sprayed-on asbestos mixed with the CaCl2 was heated at 700°C, forsterite as well as chrysotile in the material were completely decomposed.<br>

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