Method for preventing asbestos from freeing airborne particles

A - Human Necessities – 62 – D

Patent

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A62D 3/40 (2007.01) C04B 14/40 (2006.01)

Patent

CA 2474389

The method for preventing asbestos from freeing airborne particles comprises sequentially heating and the asbestos in the following surrounding temperatures values and maintaining the asbestos in these surrounding temperature values until the asbestos changes to the following corresponding colors: a) between 125~F (52~C) and 175~F (79~C) until the asbestos changes to a uniform pale russet-red color; b) between 225~F (107~C) and 275~F (135~C) until the asbestos changes to a uniform dark russet-red color; c) between 325~F (163~C) and 375~F (191~C) until the asbestos changes to a uniform dark orange color; d) between 425~F (218~C) and 475~F (246~C) until the asbestos changes to a uniform red color; e) between 525~F (274~C) and 575~F (302~C) until the asbestos changes to a uniform grey color; and f) between 625~F (329~C) and 675~F (357~C) until the asbestos changes to a uniform opaque white color. Once all the asbestos has reached an opaque white color, the surrounding temperature is decreased to an ambient temperature.

La présente invention concerne un procédé servant à prévenir l'amiante de dégager des particules dans l'atmosphère, selon lequel l'amiante est chauffée successivement aux valeurs de températures environnantes suivantes et est maintenue à ces valeurs de températures environnantes jusqu'à ce que l'amiante soit des couleurs correspondantes suivantes : a) entre 125·F (52·C) et 175·F (79·C) jusqu'à ce que l'amiante soit de couleur rouge-brun clair uniforme ; entre 225·F (107·C) et 275·F (135·C) jusqu'à ce que l'amiante soit de couleur rouge-brun foncé uniforme ; c) entre 325·F (163·C) et 375·F (191·C) jusqu'à ce que l'amiante soit de couleur orange foncé ; d) entre 425·F (218·C) et 475·F (246·C) jusqu'à ce que l'amiante soit de couleur rouge uniforme ; e) entre 525·F (274·C) et 575·F (302·C) jusqu'à ce que l'amiante soit de couleur gris uniforme ; et f) entre 625·F (329·C) et 675·F (357·C) jusqu'à ce que l'amiante soit de couleur blanc opaque uniforme. Quand toute l'amiante est de couleur blanche opaque, la température environnante est baissée à une température ambiante.

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