Method of preparing a suction mold for receiving vitrified radio

Details Method of preparing a suction mold for receiving vitrified radio Method of preparing a suction mold for receiving vitrified radio

1985-11-04

1987-05-19

Lindsay, Robert

Glass manufacturing

Processes

Operating under inert or reducing conditions

29455R, 65 34, 65124, 65130, 65329, 252629, 252633, 422159, 425546, C03B 528, C03B 718, C09K 1104

Patent

active

046664947

ABSTRACT:
Suction molds used in the suction removal process must first be prepared ore they can receive vitrified radioactive waste materials. A method is disclosed for preparing the suction mold which includes a suction pipe welded into the base of the mold with a desired-break location whereat the suction pipe is broken off during the suction removal process. An evacuation stub is mounted in the mouth of the suction pipe and communicates with the interior of the mold. The method of the invention includes evacuating the mold through the evacuation stub and then heating the mold to remove moisture and organic impurities. The mold is then filled with a dry inert gas and the evacuation stub is cleaned. The mold is then evacuated to a predetermined residual pressure. Thereafter, the evacuation stub is cold-press welded so as to close off the interior of the mold from the ambient.

REFERENCES:
patent: 4115311 (1978-09-01), Sump
patent: 4158639 (1979-06-01), Berty
patent: 4199343 (1980-04-01), Eolin et al.
patent: 4208177 (1980-06-01), Allen
patent: 4234449 (1980-11-01), Wolson et al.
patent: 4341547 (1982-07-01), Heimerl
patent: 4582674 (1986-04-01), Stritzke

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