The three types of crushers most commonly used for crushing CDW materials are the jaw crusher, the impact crusher and the gyratory crusher (Figure ).A jaw crusher consists of two plates, with one oscillating back and forth against the other at a fixed angle (Figure (a)) and it is the most widely used in primary crushing stages (Behera et al., 2014).
But, impact crushers involve an impact method. There is a hopper one side that takes the crushing material into the machine. All material is carried only within a cage. This cage has an opening on the end, bottom and on the side. These openings help in escaping the pulverized material from the impact crusher.