Method for cleaning mixing devices

Details Method for cleaning mixing devices Method for cleaning mixing devices

B - Operations, Transporting

08

B

141/34

B08B 3/08 (2006.01) B01F 15/00 (2006.01) B29C 47/08 (2006.01) G21F 9/30 (2006.01)

Patent

CA 1153672

Abstract Cleaning mixing devices such as worm machines used for embedding radioactive wastes in hot bitumen to remove residual bitumen and salt incrustations by 3 steps. a) Washing with a solvent for bitumen in a volume amount equal to about the free space of the device. b) Rinsing with a water-soluble rinsing medium miscible with the solvent in a volume amount the same as a). c) Rin- sing with demineralized water in a volume amount twice b). Pumice gravel is uscd to absorb the solvent and rinsing medium and the resultant pumice embed- ded in bitumen and sent to ultimate storage.

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