PRIMARY IMPACT CRUSHER | HPI. With throughput rates up to 2,500 t/h, HAZEMAG HPI Primary Impactors are used extensively in the cement, aggregate and recycling industries. ... HAZEMAG impact crushers can handle individual lumps of feed material up to 8 tons in weight and 3 m3 (100 cu.ft) in volume, effecting the comminution process in a single ...