Sri Lanka’s construction boom drives demand for efficient sand and aggregate processing. A small grinding mill, typically 5–50 t/h capacity, is ideal for local quarries and mid-scale projects. Common models include Raymond mills (for limestone) and ball mills (for harder rocks like granite), often paired with jaw crushers or cone crushers in compact production lines.
| Equipment | Model Example | Key Parameters |
|---|---|---|
| Grinding Mill | MTM1600 Raymond Mill | Capacity: 3–8 t/h; Feed size: ≤30mm; Power: 55kW |
| Jaw Crusher | PE400×600 | Capacity: 15–60 t/h; Max feed: 340mm; Power: 30kW |
| Screening Machine | 3YK1548 | Screen layers: 3; Processing capacity: 50–400 t/h |
1. Primary crushing (Jaw crusher) → 2. Secondary grinding (Raymond mill) → 3. Screening (Vibrating screen) → 4. Sand washing (optional). This setup suits Sri Lanka’s granite/limestone resources, producing 0–5mm sand and 5–20mm aggregates.
Q1: What’s the energy consumption?
A1: ~25–40 kWh per ton for a complete line with dust control.
Q2: Maintenance challenges in humid climates?
A2: Use corrosion-resistant materials like stainless steel screens and regular lubrication checks.
A local contractor installed a 20 t/h line (PE250×400 jaw crusher + MTM1000 mill) for road base material. Output: 12 t/h of 0–10mm
