High-Efficiency Sand Washing Plant Solutions for New Zealand’s Aggregates Industry
Struggling with Contaminated or Poor-Qrade Sand?
Sand quality directly impacts construction durability, concrete performance, and compliance with NZS 3121 standards. Inconsistent grain size, high silt content, or clay contamination can lead to costly rejections and project delays. Our advanced sand washing plants are engineered to solve these challenges—delivering uniformly clean, market-ready sand while maximizing recovery rates and minimizing water consumption.
How Does Our Sand Washing Plant Work?
A seamless three-stage process ensures optimal results:
- Feed & Pre-Screening: Raw material is fed into a vibrating screen to remove oversized debris.
- Washing & Scrubbing: A high-intensity log washer or attrition scrubber breaks down clay bonds, while a spiral classifier or hydrocyclone separates silt.
- Dewatering & Stockpiling: A fines recovery system captures ultra-fine particles (<75µm), and a dewatering screen delivers drip-free sand at 12–15% moisture content.
Why Choose Our Sand Washing Plant Over Competitors?
| Feature | Our Solution | Conventional Systems |
|---|---|---|
| Water Recycling | Closed-loop system (85% reuse) | High freshwater demand |
| Fines Recovery | Up to 95% yield with cyclones | Significant loss of fines |
| Footprint | Modular design (30% space saved) | Bulky, fixed layouts |
| Power Efficiency | Variable-speed drives (20% savings) | Fixed-speed motors |
Key Innovations:
- Zero Spillage Design: Fully enclosed chutes prevent material loss.
- Smart Control System: Real-time monitoring of feed density and water pressure.
- NZ-Tailored Build: Corrosion-resistant materials withstand coastal conditions.
Technical Specifications
| Model | SWP-100 | SWP-200 | SWP-300 |
|---|---|---|---|
| Capacity (tph) | 50–80 | 100–150 | 200–300 |
| Power (kW) | 45 | 75 | 110 |
| Water Consumption (m³/h) | 30 | 50 | 80 |
| Dimensions (L×W×H) | 8×3×4m | 12×4×5m | 15×5×6m |
Proven Performance Across New Zealand Applications
Case Study: North Island Aggregate Producer
Challenge: Silt levels exceeding 8% caused repeated non-compliance with roading specs.
Solution: Installed an SWP-200 with integrated hydrocyclone and thickener.
Results: Silt reduced to <3%, production uptime increased by 22%, and water usage cut by 40%. .jpg)
Ideal For:
- Concrete sand production (meeting NZS 3121)
- Quarry wash plants removing volcanic clay (e.g., Waikato basins)
- Coastal dredging operations requiring salt removal
Flexible Acquisition Options
- Outright Purchase: NZD $250,000–$600,000 (model-dependent).
- Lease-to-Own: Low upfront cost with flexible terms over 3–5 years.
- Retrofit Kits: Upgrade existing equipment with our dewatering modules (+15% efficiency).
FAQs: Sand Washing Plants in New Zealand
What’s the typical ROI period?
Most operators achieve payback within 18 months via reduced waste and premium sand pricing.
How do you handle wastewater disposal?
Our plants include sludge thickeners for easy dewatering—solids can be repurposed as fill material.
Can it process volcanic pumice sands?
Yes, our attrition scrubbers are optimized for lightweight aggregates common in Central Plateau quarries.
What maintenance is required?
Daily greasing of bearings and monthly screen mesh inspections—full manuals and NZ-based training provided. .jpg)
Engineered for New Zealand’s harsh conditions, our sand washing plants deliver unmatched reliability and ROI—ensuring your operation meets stringent quality demands while keeping costs under control.