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In recent years, the technology of cryogenic comminution has been
widely applied in the field of chemical engineering, food making,
medicine production, and particularly in recycling of waste
materials. Because of the increasing pollution of waste tires and
the shortage of raw rubber resource, the recycling process for
waste rubber products has become important and commercially viable.
This technology has shown a great number of advantages such as
causing no environmental pollution, requiring low energy
consumption and producing high quality products. Hence, the normal
crusher which was used to reclaim materials, such as waste tires,
nylon, plastic and many polymer materials at atmospheric 12
temperature is being replaced by a cryogenic crusher. * In the
cryogenic crusher, the property of the milled material is usually
very sensitive to temperature change. When a crusher is in
operation, it will generate a great deal of heat that causes the
material temperature increased. Once the temperature increases over
the vitrification temperature, the material property will change
and lose the brittle behavior causing the energy consumption to
rise sharply. Consequently, the comminution process cannot be
continued. Therefore, it is believed that the cryogenic crusher is
the most critical component in the cryogenic comminution system.
The research on the temperature increase and energy consumption in
the cryogenic crusher is not only to reduce the energy consumption
of the crasher, but also to reduce the energy consumption of the
cryogenic system.
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