Granite, basalt, diabase, siliceous river stone. Rock that runs 100 to 300 MPa and wears steel for a living. The answer is not a bigger hammer — it is a jaw that takes the first hit, a cone that does the reduction work, and a screen that sizes the output to what your contract asks for.
Hard rock means high compressive strength, high abrasion and high free silica. Those three together are what decide the flow — not the name of the stone.
Dense and tough, the most widely used hard rock aggregate source.
The first choice for rail ballast and asphalt surface aggregate.
Tight, hard rock used for high-grade concrete aggregate.
Common feed in mountain aggregate operations.
The most abrasive group — chambers and liners wear fastest here.
Mine feed, primary reduction before further processing.
If your rock is close to 150 MPa and the silica content is low, the soft rock flow may cost less to run — send the test report and we will say which side you are on.
The line is built from three tracked units. Each one is a standard model from the range — same-model machines and spare parts are interchangeable.
A deep chamber and a large feed opening take run-of-quarry rock straight from the blast. The moving jaw squeezes and splits the stone down to 150–300 mm. A grizzly feeder scalps soil and fines before they reach the chamber, so the crusher does useful work only. No foundation, no civil works — the unit walks to the face.
Laminated crushing takes place between the cone and the liner — this fracture mode propagates cracks along grain boundaries instead of shattering the stone. The result is a cubical product with low flake content, exactly what high-grade aggregate specifications require. Oversize from the screen re-enters the cone for a second pass, forming a closed circuit — the stockpile meets the specification rather than depending on operator patience. Hydraulic setting and chamber clearing keep the unit running through the entire shift.
The screen is the sizing step of the line. A multi-deck vibrating screen cuts the cone output into four saleable fractions in one pass, each deck discharging to its own stockpile conveyor. Decks and mesh are changed to match the specification, and the screen angle is adjusted hydraulically to balance output split and purity.
Two crushing stages and one closed screening loop. This is the standard arrangement for abrasive rock, and it is what every hard rock reference below runs.
A loader charges the jaw directly. The grizzly feeder removes soil and fines first, so clay never enters the chamber and never blinds the screen downstream.
The jaw reduces run-of-quarry stone to roughly 150–300 mm. Product size is set by the discharge opening. An iron remover on the jaw discharge belt effectively removes waste metal from the stone and prevents cone blockages.
Primary output from the jaw enters the cone, which reduces the 150–300 mm feed to the finished fraction in a closed setting. Laminated crushing gives the cubical shape; oversize material is returned by the screen to the machine for re-crushing, forming a closed circuit that raises the yield of on-spec material.
On-spec material from the cone enters the screen, which splits it into up to four product sizes as the project requires. Different sizes only need a change of screen mesh.
Four reasons, all of them cost or specification arguments rather than preference.
A manganese jaw and a cone liner outlast blow bars on silica by a wide margin. The cone costs more to buy and far less to run — on abrasive rock the difference is recovered in wear parts alone.
Laminated crushing produces cubical particles with low flake content. Impact shaping on hard rock gives a good shape too, but at a wear cost the contract usually will not carry.
Tracked units work without a foundation and can be repositioned as the bench advances. Compared with a fixed line, the saving is in haul distance and civil works, not in the machine price.
Feed rate and chamber load are matched automatically, and the units are interlocked: if the cone stops, the jaw stops. Fewer blockages, and no operator watching three panels at once.
Capacities are the published range for each line. The right combination depends on your feed size, the product split and the tonnage you actually need to ship.
| Stage | Models | Capacity | Duty |
|---|---|---|---|
| Mobile jaw crusher | SE-650D · TZ6510 · SE-1060 · SE-1160 | 50–380 TPH | Primary, 500–800 mm feed opening |
| Mobile cone crusher | SY-HP200 · SY-HP300 · SY-HP400 | 120–380 TPH | Secondary and tertiary crushing |
| Mobile screening plant | SS-7018 · SSP-6200 · SZ-450D | 200–500 TPH | Screening into different product sizes |
A proven combination for granite and river stone is a 700 mm jaw feeding a 210 mm cone, with a three-deck screen and oversize returned to the cone.
All three are in China, and all three use the same two-stage closed circuit rather than a different flow per site.
Site visits can be arranged for serious enquiries — tell us which material is closest to yours.
The four that come up in almost every hard rock enquiry.
On granite and basalt, no. The jaw produces 150–300 mm material, which is not a saleable aggregate and cannot be reduced to 0–31.5 mm by screening. Skipping the cone gives you a low output, a poor shape and a screen full of oversize. On softer rock it is a different answer — see the soft rock solution.
Blow bars wear out in weeks on high-silica feed, and every change is a production stop. The purchase price of an impactor is lower; the cost per ton is not. This is the single most expensive mistake we see in hard rock enquiries.
Scalp it before the chamber. The grizzly on the jaw removes most of it, and a separate heavy-duty screen handles the sticky cases. Clay that reaches the screen blinds the deck within hours, and a blinded deck stops the whole circuit.
They travel on low-loaders, so destination limits on width and axle load decide which model ships without a special permit. Tell us the destination early — it is cheaper to choose the right frame than to arrange an escort.
Tell us the material, the maximum lump size, the products you need to sell and the destination port. We will come back with a configuration and the wear-parts list that goes with it.
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