The crushing plant reduces rock material into defined grain sizes for road construction, concrete production, or construction material recycling. Distinction is made by crusher type: jaw crushers (coarse primary crushing), impact crushers (cubic grain), cone crushers (fine crushing), and roll crushers (soft materials).
Mobile crushing plants have revolutionized the industry: tracked mobile crushers from Kleemann (Wirtgen Group), Metso, and Sandvik travel directly to demolition sites and process construction waste on-site into reusable recycled concrete aggregate (RCA) material. Throughput rates of mobile jaw crushers range from 100–600 t/h, with feed sizes up to 1,200 mm.
Stationary crushing plants in quarries and gravel pits operate in multi-stage processes: primary crusher → secondary crusher → screening plant → classification. Automation is highly advanced: frequency-controlled drives, automatic gap adjustment, and online grain size analysis optimize throughput and product quality. Wear parts (crusher jaws, impact plates) are made from manganese steel or chromium cast iron.