For coal mining geologists in Indonesia, optimizing overburden processing into high-quality aggregates requires tailored crushing and sand-making solutions. Here’s a technical breakdown of key equipment and configurations:
1. Primary Jaw Crusher
– Model: JC98 (Feed size: ≤600mm, Capacity: 150-350t/h)
– Handles coarse crushing of excavated rock with high abrasion resistance.
2. Secondary Cone Crusher
– Model: HPT300 (Max feed: 240mm, Output size: 19-38mm adjustable)
– Hydraulic adjustment ensures consistent particle shape for concrete aggregates.
3. Tertiary Impact Crusher/VSI
– Model: VSI6X1263 (Throughput: 250-380t/h, Sand yield: 30-50%)
– Produces machine-made sand meeting ASTM C33 standards.
| Equipment | Power (kW) | Weight (t) | Output Size Range |
|———–|————|————|——————-|
| JC98 | 132 | 28 | 50-150mm |
| HPT300 | 315 | 26 | 19-38mm |
| VSI6X1263 | 400×2 | 18 | 0-5mm |
Q1: How to handle clay-rich overburden?
*A:* Pre-screening with grizzly bars (>50mm spacing) + log washers reduce clay content before crushing.
Q2: Power supply solutions for remote sites?
*A:* Diesel-hydraulic drive options available for primary crushers (e.g., JC98-D model).
East Kalimantan Overburden Recycling Plant
– Feed material: Andesite overburden (compressive strength ~180MPa)
– Configuration: JC98 + HPT300 + VSI6X1263 + dewatering screen
– Output products:
– Coarse aggregate (10-20mm): Used for local road base
– Manufactured sand (<5mm): Supplied to ready-mix plants
This system achieved
