Crushing is a specific operation in widespread use in manufacturing or  treatment processes in many industrial sectors. Its purpose varies  according to the branch of activity in which it is employed. The  preparatory study on the topic of crushing focused on reducing exposure  to any harmful chemicals caused by this particular operation. In this  respect, it was shown that the recycling sector is an area of activity  where crushing is virtually unavoidable when exploiting waste products,  and that it is a major source of employee exposure to toxic pollutants.  Among the many crushing technologies employed in this sector of  activity, impact fragmentation appears to be particularly polluting. The  study proposed will thus focus on looking for emission reduction  solutions to reduce the emissions of impact crushing technology. In  particular, three areas intended to reduce the harmful effects of  chemicals will be explored during this study by way of external  partnerships: pollutant segregation inside the crushing chamber,  integration of wet abatement solutions and, finally, development of wet  processes when the material allows for this.

http://en.inrs.fr/publications/en_C.6-3.010.html