High reduction ratio, cubic product and reversible blow bars — an efficient choice for secondary and tertiary crushing and shaping of medium-soft rock such as limestone.
PF / HIC Series Impact Crusher
The PF-1315VI（2腔） is part of the Impact Crusher from New Shanbao. A high-speed rotor drives blow bars that strike the material, throwing it against the impact plates; it rebounds into the chamber and is broken by repeated impacts between blow bars, plates and other particles. Because impact crushing follows natural fractures, the product is close to cubic with low flakiness.
This model is supplied with motor; electrical control not included, with a motor power of 185kW. It suits brittle material of medium compressive strength — limestone, dolomite, sandstone, shale, coal gangue — and is widely used in aggregate, cement, building materials and construction-waste recycling.
The reduction ratio of an impact crusher can reach 20–40, so a single secondary unit can take 500 mm feed down below 20 mm, simplifying the flowsheet considerably. Blow bars are available in high-chromium cast iron or high-manganese steel and can be turned to use all four edges, keeping running cost predictable.
An impact crusher consists of a rotor, blow bars, impact plates and a frame. The motor drives the rotor at high speed through V-belts. Feed entering the chamber is struck by the blow bars, accelerated and thrown against the first impact plate; it rebounds into the blow-bar path, is struck again and thrown against the second plate. Repeated impact and attrition between bars and plates break the material progressively until it discharges from the outlet.
Because impact crushing follows natural fractures and planes of weakness, energy utilisation is high and the reduction ratio is large. The gap between the blow bars and the impact plates sets the product size: a tighter gap gives a finer product but lower throughput.
Not recommended. Granite typically runs 150–250 MPa and is highly abrasive, so blow bars wear very quickly and the running cost becomes much higher than a cone crusher. For hard rock such as granite and basalt, use a cone for secondary and tertiary duty; impact crushers suit medium-soft, brittle material such as limestone, dolomite and sandstone.
It depends on abrasiveness and tonnage. On limestone a set of high-chromium bars typically lasts 600–1,200 hours; on abrasive sandstone it may be only 300–600 hours. Because bars can be turned through four positions, the practical change point is when they can no longer be rotated.
Three options: reduce rotor tip speed to limit over-crushing; open the impact-plate gap to lower the fines fraction; or split the high-fines fraction out of the closed circuit and use it separately as manufactured-sand feed rather than circulating it inside the aggregate line.
Tell us your material type, feed size and target capacity — we will come back within 24 hours with a configuration proposal and factory-direct quotation.