Method of and apparatus for the low-temperature milling of mater

Details Method of and apparatus for the low-temperature milling of mater Method of and apparatus for the low-temperature milling of mater

1977-07-06

1978-07-25

Custer, Jr., Granville Y.

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241 23, 241DIG37, B02C 2306

Patent

active

041025032

ABSTRACT:
Low temperature embrittlement of materials which otherwise cannot be readily comminuted is carried out by treating the materials, g.g. scraps of synthetic resin containing components which might otherwise be released into the atmosphere, with a circulated cooling gas to cause the embrittlement of the materials. The latter are then conveyed through a mill, e.g. a pin-type attrition mill, in a carrier gas and are comminuted therein. The cooling gas is passed continuously around a closed circulation path so that any released components remain trapped in the circulated gas which, in turn, is cooled to a sufficiently low temperature by a separately displaced cooling fluid passed in indirect heat exchanging relationship with the cooling gas stream along the closed path of the latter.

REFERENCES:
patent: 3633830 (1972-01-01), Oberpriller
patent: 3818976 (1974-06-01), Ledergerber
patent: 3897010 (1975-07-01), Weishaupt et al.
patent: 3921917 (1975-11-01), Meinass

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