Advanced vitrification system pyrographite
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United States of America Patent
Stats
-
Nov 12, 2002
Grant Date -
Apr 26, 2001
app pub date -
Dec 11, 2000
filing date -
Jul 30, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for improving waste vitrification in a disposable canister, the process for using the device, and the process for making the device. The disposable canister, also known as a module, has outer and inner containers with thermal insulation therebetween. The device includes an inner container of graphite having a layer of pyrographite on its external wall. The outer container is typically made of stainless steel. The inner container is heated, typically by induction, to melt the frit and waste. The melted mixture is then cooled to form a vitrified product in the module. The fabrication of the pyrographite coating on the inner container involves heating the container to about 1500 degrees centigrade in a methane atmosphere, then cooling the container to ambient temperature.
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