The Dominican Republic's geological conditions provide a natural advantage for manufactured sand production. The country has abundant river gravel (from the Nizao, Yuna, and Yaque del Norte basins) and dry quarry rock resources (basalt, andesite, limestone). For materials of Mohs 5-8, the crushing and sand making process must simultaneously address three issues:
| Issue |
Defects of Traditional Solutions |
Solution Path |
| Coarse Crushing Efficiency |
Hammer crushers wear out extremely quickly; a set of hammers becomes unusable after 200-300 hours |
PE500×750 Jaw Crusher: Compression crushing, jaw plate life 600-900 hours |
| Particle Shape |
Cone crushers/hammer crushers produce multi-faceted, needle-like/flaky particles >15%, failing to meet ASTM C33 standards |
VSI8518 Impact Crusher: "Stone-on-stone" principle, rounded particle shape, needle-like/flaky <5% |
| Finished Product Cleanliness |
Without a sand washing process, mud/powder content exceeds standards, resulting in substandard concrete strength |
XSD2160 Wheel Sand Washer: Water washing for desliming and depowdering, mud content <1%, controllable stone powder |
Process Logic Chain:
Dry quarry raw stone / Legal river gravel (≤350mm) → PE500×750 Jaw Crusher: Coarse crushing to ≤100mm → VSI8518 Impact Crusher: Fine crushing, shaping, and sand making → 2YK1548 Vibrating Screen: Three-stage grading (0-5 / 5-20 / 20-40mm) → XSD2160 Sand Washer: 0-5mm manufactured sand washing and desliming → Three types of finished products are stored separately.
The core idea of this configuration is "replacing grinding with crushing and extrusion with impact"—utilizing the material impact principle of the VSI impact crusher, it processes crushed stone below 100mm to sand size while simultaneously shaping the particles, achieving two goals at once. Compared to the traditional three-stage process of "jaw crusher + cone crusher + rod mill," it saves investment in one stage of equipment and approximately 30% of the electricity consumption per ton.
Core Equipment Parameters and Selection Rationale
PE500×750 Jaw Crusher — Primary Coarse Crushing
| Technical Parameters |
Values |
| Feed Size |
500 × 750 mm |
| Maximum Feed Size |
≤ 425 mm |
| Discharge Adjustment Range |
50 - 100 mm |
| Processing Capacity |
40 - 110 t/h |
| Motor Power |
55 kW (75 HP) |
Selection Rationale
The feed size is suitable for raw material particle sizes from dry quarries in the Dominican Republic. After simple screening, most of the raw stones from blasting or mechanical mining in dry quarries have a particle size between 200-400 mm. The 500×750 mm feed inlet of the PE500×750 can directly accept these particles without secondary blasting or pre-crushing.
VSI8518 Impact Crusher — Core Sand Making and Shaping
| Technical Parameters |
Values |
| Maximum Feed Size |
≤ 35 mm (soft material) / ≤ 30 mm (hard material) |
| Processing Capacity |
100 - 130 t/h (throughput) |
| Impeller Speed |
2,000 - 2,200 r/min |
| Motor Power |
90 kW × 2 (dual motor drive) |
Selection Rationale
Stone-on-Stone Principle: Particle shape conforms to ASTM C33 manufactured sand standard. The VSI8518 produces cubic sand particles with moderate surface roughness. Compared to natural river sand, manufactured sand has 15%-20% higher bond strength with cement paste—especially important for building structures in the Dominican Republic located in hurricane belts, where C30 and above concrete requires higher tensile/shear strength.
FAQ (including Dominican market-specific questions)
Q1: How to choose between PE500×750 and PE600×900?
A: PE600×900 has a processing capacity of 80-200 t/h, suitable for production lines above 150 tph; PE500×750 is positioned for 80-110 tph, with an initial investment approximately 40% lower. For small to medium-sized Dominican quarries with a target capacity of 80-100 tph, PE500×750 is the optimal balance point. If your quarry is located near Santo Domingo or Punta Cana and land costs are high, the more compact footprint of PE500×750 is also a significant advantage.
Q2: How to choose between VSI8518 and VSI9526?
A: VSI9526 is suitable for large sand production lines above 150 tph. The 180kW total power of the VSI8518 is a reasonable match with the 55kW of the PE500×750. For 80-100tph, choosing the VSI9526 would be an overinvestment, and the doubled throughput (200-300 t/h) could actually lead to increased wear from "dry running" when the feed is insufficient.
Q3: Does the 60Hz power supply in the Dominican Republic require additional configuration?
A: No. All motors are designed and selected based on 60Hz as the standard – the 55kW (75HP) of the PE500×750, the 90kW×2 (125HP×2) of the VSI8518, and auxiliary equipment motors are all 60Hz compatible. The 480V three-phase power supply in the Dominican Republic can be directly connected to the control cabinet without the need for a frequency converter or transformer. This is Baichy's standard configuration for the Caribbean/Americas market.
