Method for preventing asbestos from freeing airborne particles

Details Method for preventing asbestos from freeing airborne particles Method for preventing asbestos from freeing airborne particles

2005-08-16

2005-08-16

Rosenbaum, Mark (Department: 3725)

Solid material comminution or disintegration

Processes

With heating or cooling of material

C423S167100, C588S411000, C588S254000

Reexamination Certificate

active

06929200

ABSTRACT:
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; andf) 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.

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patent: 44 33 837 (1996-03-01), None
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