Overview
Primary Impact Crushers are preferred for their high capacity and reduction ratios in crushing soft and medium hard rocks like limestone, gypsum. Due to their operating principle, reduction ratio is higher than in jaw crushers.
Primary Impact Crushers are found in a wide variety of applications. The most common is processing limestone, but any sedimentary stone and some metamorphic stone are suited for impact crushing. Impactors also operate in manmade materials with similar characteristics as sedimentary stone. Even in some rather abrasive materials, like steel slag and demolition concrete rubble, Impactors are the favored means to attain a repurposed and value-added product. In quarry operations, the use of impactors also provides a means to remove deleterious minerals. If the feed material includes soft stone, the impact force will reduce the soft stone finer than the harder rock. A screening process will then allow the soft deleterious material to pass through and out of the flow to the rest of the plant.
APPLICATIONS
Aggregate Industry: Common materials that Mega-Slam HSI can crush include limestone, asphalt, gravel and more
Brick & Clay Industry: Horizontal impactor applications and materials for this industry include brick, shale and more
Industrial Applications: Mega Slam Impact Crushers often reduce the size of lead slag, aluminum dross and more
Features
Reduction ratios up to 20:1
360° Bearing contact = long bearing life
Features 2” thick housing liners
Solid Rotor with 3 or 4 breaker bar rows
Manual or power assist apron adjustment
Max-Yield™ automatic apron adjustment system
Reversible manganese monoblock aprons
Interchangeable side liners
Working Principle
Impact Crushers create material reduction by providing a sudden impact force that causes the material to shatter along all the weakest fissures in the stone. Controlling the flow of the material through the Impact Crusher requires features that vary from one style of impactor to another, and this is what separates McLanahan from the other manufacturers. Essentially, the material enters the crushing chamber along a controlled feed angle. A spinning rotor assembly strikes the stone with a predetermined force sufficient to cause fragmentation. The trajectory of the material is then controlled to divert the flow back into the rotor circle, where the hammers (blowbars) continue to impact the material. Adjustable curtains or similar means are used to adjust the retention of the material flow for optimum output material characteristics. The impacted material flow then exits the crusher through the base frame.