P&Q University Lesson 7- Crushing & Secondary Breaking | Pit .Aug 5, 2015 . Most operations will use a gyratory, jaw or impact crusher for primary crushing. In the secondary and subsequent stages, the stone is further.used primary crushers,Crusher | Definition | Crusher Selection And Types of Crusher .Aug 10, 2012 . In rock ores, crusher is used for the reduction in size or for making pieces of . Primary crusher has the ability to receive the crushing material (a.
used primary crushers