| 摘要 |
A process for fragmenting scrap metal comprises precompressing the scrap metal into blocks having numerous interstices therein, flowing liquid nitrogen at a temperature between - alpha DEG and - 120 DEG C. through the interstices to cool and embrittle the blocks, and then compressing the cooled and embrittled blocks to fragment them into pieces of scrap metal. If desired, the fragmented scrap metal may then be seperated according to its size or composition. The process is particularly suitable for fragmenting automobile wrecks and if the scrap separated contains iron and iron alloys, the separating step may be magnetically performed.
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