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

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