The Dogwood Quarry in Columbia primarily processes granite, a hard, abrasive igneous rock ideal for high-quality aggregates. Its high compressive strength (150–300 MPa) demands robust crushing equipment to produce construction-grade sand and stone.
A tailored production line for granite includes:
1. Primary Jaw Crusher (e.g., JC98, Feed size: ≤750mm, Capacity: 150–300 TPH)
2. Secondary Cone Crusher (e.g., HPT300, Closed-side setting: 19–38mm)
3. Tertiary Impact Crusher/VSI Sand Maker (e.g., VSI6X1263, Output: 200–400 TPH, Fineness modulus: 2.6–3.0)
4. Vibrating Screens (Multi-layer designs for 0–5mm, 5–10mm, 10–20mm gradation)
| Equipment | Model | Power (kW) | Output (TPH) |
|---|---|---|---|
| Jaw Crusher | JC98 | 160 | 150–300 |
| Cone Crusher | HPT300 | 315 | 120–250 |
| VSI Crusher | VSI6X1263 | 315×2 | 200–400 |
Screens with polyurethane panels reduce wear from granite abrasion. Adjustable amplitude (3–5mm) ensures precise separation of coarse/fine aggregates (<5mm sand yield ≥35%).
The produced 0–5mm machine-made sand meets ASTM C33 standards for concrete. A South Carolina highway project utilized Dogwood Quarry’s granite aggregates (~500 TPD line) with VSI shaping to achieve ≤15
