Most Sulawesi laterite lines do not miss target because of nameplate. They miss target when rainfall turns ROM feed into sticky clay-lump mix and choke events start after lunch shift.
This guide compares three practical layouts for 120-300 TPH operations that need a stable feed envelope for kiln or HPAL preparation without overbuilding capital.
30-second decision framework
Condition
Feed moisture frequently exceeds 18% and clay bands are visible
Start with a jaw-led route and keep an open bypass to washing
Trying to force tight reduction too early usually creates buildup and unstable throughput.
Condition
Contract asks for consistent -30 mm feed with low oversize recirculation
Add cone stage with conservative CSS and two-deck control screen
This is the lowest-risk way to hold top size without sacrificing hourly tons.
Condition
Penalties are tied to downtime instead of only tonnage
Choose the high-stability route with trim stage and washing contingency
Operational resilience pays back faster than chasing the absolute lowest CAPEX.
Inputs you must lock before model selection
- Monthly moisture profile by pit zone, not only annual average.
- Clay and sticky fraction percentage above 10 mm.
- Required feed window for downstream kiln/HPAL prep.
- Allowed downtime per month under offtake contract.
- Water balance for wash loop and return pond in rainy season.
Recommended process lines
Dry-start route
Capacity: 120-180 TPH
Feed: Laterite lumps up to 450 mm
Target output: -40 mm feed
Setup: PE Jaw -> PY Cone -> 2-deck screen
Why this works
- Simple to commission with smaller operating team.
- Lower initial CAPEX when mine plan is still being validated.
- Good baseline for first 6-9 months of operation.
Balanced wet-season route
Capacity: 160-240 TPH
Feed: Mixed laterite, seasonal sticky pockets
Target output: -30 mm stable feed
Setup: PE Jaw -> PY Cone -> screen -> XS Washer
Why this works
- Keeps screen efficiency acceptable when moisture rises.
- Reduces downstream plugging risk during monsoon periods.
- Maintains quality with moderate operating complexity.
Contract-stable route
Capacity: 220-300 TPH
Feed: Variable laterite with high clay spikes
Target output: Tight -30 mm with low upset frequency
Setup: PE Jaw -> PY Cone -> PF Impact trim -> screen -> XS Washer
Why this works
- Adds a controllable trim stage when feed quality swings hard.
- Improves consistency for plants with strict feed acceptance window.
- Best fit when downtime penalties are financially heavy.
Indonesia laterite route comparison
| Metric | Dry-start | Balanced wet | Contract-stable |
|---|---|---|---|
| Best feed condition | Dry to moderate moisture | Mixed seasonal moisture | High variability and sticky spikes |
| Water demand | Low | Medium | Medium-high |
| Operational complexity | Low | Medium | High |
| Typical failure mode | Wet-season choke | Wash loop under-sized | Over-tuning by inexperienced crew |
| When teams usually upgrade | After first monsoon | After offtake quality tightening | Usually final architecture |
What Usually Breaks in Month Three
The common pattern is not mechanical failure. It is loss of control over feed consistency after weather turns and the team keeps old dry-season settings.
Teams that log moisture, choke events, and screen efficiency daily can usually avoid emergency hardware changes and instead tune operating window early.
- Do not use one fixed CSS setpoint across dry and rainy months.
- Keep bypass and wash circuit logic in the SOP before rain starts.
- Track oversize recirculation as a leading indicator, not a lagging KPI.
- Schedule liner checks around pit-zone change, not only calendar dates.
How Buyers in Indonesia Separate Good and Bad Proposals
Strong proposals state exactly how the line behaves at high moisture and what throughput derating is expected. Weak proposals only show dry test numbers.
Before PO, ask suppliers to commit feed assumptions, expected recirculation range, and acceptable operating window in writing. That document saves months later.
RFQ checklist before you contact suppliers
- ROM moisture histogram by month and mine block.
- Clay fraction above 10 mm and sticky index reference.
- Target top size and allowable oversize percentage.
- Water availability and recycle pond limits.
- Downtime penalty terms in offtake or tolling contract.
- Ramp-up plan with dry and wet season parameter sets.
Need a model recommendation for your project?
Share your feed size, target products, and throughput range. Our engineering team can propose a practical equipment list and sizing baseline.
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