The MA (or Hammer Crusher) is an impact crusher that crushes by percussion between a rotor fitted with hammers (or knives) and a stator fitted with a grid that ensures the desired particle size.
It is generally used as a pre-crusher upstream of a crushing plant; the MA crushes blocks of raw material into smaller particles that can be processed by a fine mill.
Products are fed tangentially into the crushing chamber, then conveyed by hinged hammers on a rotor rotating at high or medium speed. Products are crushed in the lower part, above the sieve or perforated plate. Products remain in the machine until they have reached the particle size required to pass through the screen.