Cost of crushing 400 tons of limestone and gypsum per hour (China)

I’ve watched a lot of procurement managers frown over quotation sheets with this exact question. Four hundred tons per hour — sounds straightforward enough. But the moment you throw limestone and gypsum together on the same line, things get complicated fast. Pick the wrong equipment configuration and you’re looking at either a throughput ceiling you can’t break through, or liner sets ground down inside three months. Either way, you’ll end up losing far more than you saved on the initial purchase.

So let’s break this down properly — every cost, every moving part.

1. Know Your Material Before You Talk Equipment

Limestone and gypsum both get labeled “soft rock,” but they behave very differently under a crusher. Limestone typically comes in with a UCS (Uniaxial Compressive Strength) of 80–120 MPa, Mohs hardness of 3–4, and a BWI (Bond Work Index) in the range of 10–14 kWh/t. Gypsum is softer — Mohs 1.5–2, BWI usually below 8 kWh/t — but it brings a different headache: high adhesiveness and a tendency to pack and block the crushing chamber if flow geometry isn’t right.

Are you running both materials on a shared line, or dedicated lines? Do you need a specific product shape? These questions drive equipment selection more than anything else. I’ve seen operations lose ¥700,000–800,000 by skipping this conversation and just ordering kit.

2. The Two Main Configuration Routes at 400 TPH

In China’s market, a 400 TPH limestone/gypsum crushing line typically goes one of two ways:

• Two-stage (primary + secondary/tertiary) — suited for general construction aggregate yards and cement plant clinker feed lines where strict product shape isn’t critical
• Three-stage (primary + secondary + sand-making) — suited for manufactured sand production or projects requiring high-grade aggregate specifications

SBM has a well-proven setup for this tonnage range. Let’s walk through the configuration and what it costs.

Typical Three-Stage Configuration: SBM Equipment Lineup

⚠️ Note: Prices above are ex-factory VAT-inclusive reference ranges for 2024–2025. Actual quotations vary based on steel prices, configuration grade (standard vs. premium), and installation/commissioning costs. Final pricing per SBM official contract.

3. Total Cost of Ownership — This Is Where the Real Money Goes

Too many operators fixate on the equipment purchase price. That’s a trap. After two decades in this industry, I’ll tell you straight: the sticker price is just the tip of the iceberg. The ongoing costs are what actually define your profitability.

3.1 Wear Parts Cost

Liner life on your cone crusher is the single biggest lever on per-tonne operating cost. SBM’s HPT300 fitted with manganese steel liners — specifically Mn18Cr2 upper and lower liner sets — delivers 1,200–1,800 hours of service life in standard limestone duty. If your feed contains elevated silica (quartz content above 15%), upgrade to Mn22Cr2. For gypsum, liner wear is almost never the bottleneck — it’s packing and blockage that gets you.

Running 400 TPH at 8,000 hours per year, expect jaw plate consumption of roughly 2–4 sets annually, cone liner sets 4–6 per year, and VSI6X throw heads plus anvils replaced 2–3 times depending on feed. Annual wear parts budget: approximately CNY 150,000–300,000.

3.2 Power Cost

Assuming annual output of 3.2 million tonnes (400 TPH × 8,000 hrs), power cost works out to roughly CNY 1.16/tonne. For gypsum, the lower hardness means the VSI6X can run at reduced frequency — power savings of 10–15% are realistic.

3.3 Labour and Maintenance

A 400 TPH line typically needs 3–4 operators and 1–2 maintenance technicians. Monthly labour cost runs CNY 40,000–60,000. Budget an additional CNY 100,000–150,000 per year for scheduled major overhaul work.

4. All-In Cost Summary: What’s Your Per-Tonne Processing Cost?

Bottom line: running a mature 400 TPH limestone crushing line with SBM equipment in China, your all-in processing cost lands at roughly CNY 1.50–1.70 per tonne. That sits in the competitive mid-range for the industry. Gypsum, being softer, comes in even lower — there’s room to press those numbers down further.

5. Where SBM Actually Earns Its Edge

On the HPT multi-cylinder hydraulic cone — there’s one feature I always point out, because it’s genuinely useful in the field: the hydraulic tramp iron relief system. When an uncrushable piece enters the chamber, the discharge opening widens automatically, the foreign object passes through, and the crusher resets itself. No shutdown, no prying open the chamber, no drama. On limestone quarries where tramp metal or hard inclusions show up in feed, that’s not a marketing talking point — it’s real downtime prevention.

The VSI6X series is worth calling out separately. Its rock-on-rock crushing chamber design keeps wear-part consumption extremely low on medium-soft materials like limestone and gypsum, and the product shape is consistently good. That’s why it’s been adopted so widely in cement aggregate operations and gypsum powder pre-processing plants — it simply performs where other sand-making units struggle.

6. Buyer FAQ — The Questions That Actually Matter