Crushed stone is a commodity with a local price and a local specification. The line has to be built backwards from the sizes your buyers order, not forwards from a machine's catalogue capacity.
An aggregate line has three jobs and one constraint. The jobs: reduce run-of-mine rock, cut it into the sizes your market buys, and do it at a cost per ton that leaves a margin after fuel, power, wear and labour. The constraint: your specification. A plant producing 0–20 mm when the local market prices 5–10 mm separately is leaving money on the ground, and no amount of extra tonnage fixes that.
So we start from your product list and your local spec, then design the crushing stages to hit it. The equipment list follows, and it usually surprises buyers in two ways: the screens are more important than they expected, and the primary is often smaller than they were about to order.
The arrangement below covers the large majority of quarry lines we ship. Node count changes with your product list, but the sequence rarely does.
Scalps fines before the primary. Raises effective jaw capacity and cuts jaw-plate wear — the single most commonly skipped item in cheap line quotes.
Reduces run-of-mine to a size the cone can accept. Set as coarse as the secondary allows, because primary reduction is the cheapest reduction you will ever buy.
Closed circuit: screen the jaw product, send oversize to the cone, return the oversize. This is where the line's real throughput is decided.
Produces the saleable cuts and, where required, manufactured sand. Multi-deck screens do the product separation; the grading curve is a screens-and-aperture decision.
This is a real arrangement we quote repeatedly for granite quarries in West Africa and Southeast Asia. Use it as a reference point for your own project — then send us your numbers and we will change what needs changing.
| Stage | Equipment | Model | Qty | Power (kW) | Note |
|---|---|---|---|---|---|
| Feeding | Twin-shaft bar feeder | SJ.G.Z.13.60 | 1 | 30 | Scalps −40 mm ahead of primary |
| Primary | Jaw crusher | SJ.E.90.12 | 1 | 185 | Setting 95–200 mm, coarse as secondary allows |
| Secondary | Multi-cylinder cone | SK.D.1500 (medium) | 1 | 400 | Closed circuit with pre-screen |
| Tertiary | Multi-cylinder cone | SK.D.1200 (fine) | 1 | 220 | Produces 0–20 mm fraction |
| Screening | Circular vibrating screen | SJ.Y.3.A.27.60 | 2 | 2 × 37 | 3-deck, product cuts as listed |
| Stockpile | Belt conveyors & structure | self-fabricated | — | — | Built to the same drawings as the machines |
Indicative only — conveyor lengths, stockpile arrangements and total installed power depend on your site layout. The quotation comes with a drawing set showing all of it.
We go through all six with you at design stage, in writing. That is what the configuration sheet is for — it shows exactly which machine does what, and why, so nothing about the line's performance is a surprise later.
Feed openings 500×900 to 1,300×1,600 mm, 50–1,200 t/h.
12 configurations across 4 sizes, 145–1,000 t/h.
200–1,150 t/h on coarse/medium cavities.
220–700 t/h, cubical 0–5 mm product for concrete.
2- and 3-deck, 180–850 t/h, to your product cuts.
Bar scalping feeders and vibrating feeders to 1,500 t/h.
Work backwards from what you can sell. If your local market absorbs 2,500 tons a day of 0–20 mm and your working shift is 12 hours, a 250–300 t/h line with reasonable availability does the job. Buying a 500 t/h line for a market that cannot absorb the output ties capital up in stockpiles.
Yes, and most of our clients do. The aggregate cuts come off the screens; a VSI in closed circuit with a sand screen produces 0–5 mm. You can add the sand stage at build or later — we design the structure and the conveyor take-off points to allow for it.
Standard machine lead time is 60 days from order confirmation. Add shipping to your port — typically 3–5 weeks to West Africa, 2–3 weeks to Southeast Asia — then installation and commissioning, which for a 300 t/h line is usually 4–8 weeks depending on how much site work you do yourself. We will give you a project timeline with the quotation.
Material type and hardness, maximum feed lump, feed gradation if you have it, target capacity, required product sizes, site power supply and the market prices you sell into. Six of those seven, and we can quote. All seven, and the quotation includes a payback calculation.
Feed gradation, target tonnage and the sizes you sell. You get a flow sheet, an equipment list with models, and a payback estimate using your local aggregate price.