Impactor Crushing Plants

Recycling. Grasan impactor crushing plants are designed and built for recycling concrete and asphalt rubble and C&D debris. For recycling, impactors are far superior to jaw crushers or jaw/cone combinations. An impactor normally needs no secondary crusher and can crush a greater variety of materials with more control over product size. Further, an impactor shatters concrete, leaving wire mesh, rebar, and other steel virtually concrete-free. A magnetic separator mounted atop the crusher discharge conveyor pulls the clean steel from the crushed material and deposits it directly into a truck or dumpster, ready for resale.

Crushing aggregates. More and more quarry operators are recognizing the superiority of primary impactors for high-capacity crushing of limestone with low to normal silica content. With a reduction ratio of as much as 30 to 1 in closed-circuit, a single Grasan impactor plant is more efficient, generally costs less to buy, and creates higher production than a jaw/cone combination.

Hazemag impactors are standard on all Grasan impactor crushing plants. Hazemag primary impactors are designed especially for recycling, and over 60,000 Hazemag impactors have been sold. Grasan has more experience with impactor recycling plants than anyone else, and we have found Hazemag impactors to be the most efficient and trouble-free with the least maintenance.

Hazemag APPH primary impactors with hydraulic controls are standardl on all crushing plants (except KR1010). Hazemag's fully-automatic, hydraulic cylinder system is the newest and the only significant advancement in impactor technology in many years. APPH impactors handle larger incoming slabs and cubes, and give 15% to 20% greater production from a same-size machine with smoother operation and more uniform product. Crusher adjustments have been simplified so that no tools are needed. A hydraulic moveable inlet base helps clear jamming and bridging.

Fast set up without a crane. All road-portable plants (KRH1313 and larger) have a skid-on/skid-off hopper that transfers from a flatbed trailer to the crusher chassis, ready for operation, in about 60 minutes with only block-and-tackle and front-end loader assist. Total support for the crushing plant is provided by six independent hydraulic legs to further speed set up and to give precise height/leveling adjustments. An entire road-portable system, including crushing plant and screen with discharge and return conveyors, can be set up in four to eight hours without crane assist.

Diesel or electric power. The KR1010 and KRH1013 are diesel-powered. All other Grasan impactor plants are available with diesel or electric power.
With a diesel engine, you can regulate the crusher speed according to material types and product sizes. An electric-powered crusher runs at one constant speed, and any change in speed requires that you change v-belt pulley sheaves. However, diesel power puts constant noise at the operator station, and dust from crushing can affect the engine. The electric motor is quiet and basically unaffected by dust. Thus, in recent years, the trend has been toward electric-powered crushing plants run from generators or line power.

Electrical control system. Grasan can provide a generator and manual or computerized electrical control system with quick-connect fittings. This system is often installed in a van trailer with "pop-up" control cab.