Headline: ISO Certified Sand & Gravel Mining Manufacturing: Reducing Fines Loss & Meeting Spec in HighVolume Production

Subheadline: Engineered for consistent gradation, lower wear costs, and compliance with ASTM/CEN standards for commercial aggregate producers.

1. The Cost of Inefficient Sand & Gravel Processing

Every ton of misplaced fines or oversized material represents lost revenue. For a plant processing 500 TPH, a 5% deviation in gradation can result in $1.2M in rejected loads or rework costs annually. Plant managers face three persistent challenges:

• Fines loss exceeding 15%: Traditional washing systems often waste valuable 200 mesh material, reducing yield and increasing pond maintenance costs.
• Inconsistent product spec: Fluctuating feed material causes frequent sieve analysis failures, leading to contract penalties and customer complaints.
• Excessive wear on downstream equipment: Uncontrolled oversized material accelerates crusher liner and screen media replacement, increasing OPEX by 2030%.

How does your current system handle variable feed moisture and clay content without sacrificing throughput?

2. Product Overview: The ISOCertified Modular Washing & Classification Plant

This equipment is a closedloop, multistage sand and gravel washing and classification system designed for commercial aggregate mining operations. It integrates a highfrequency dewatering screen, a hydrosizer (teeterbed separator), and a log washer into a single, ISO 9001certified manufacturing platform.

Operational Workflow:
1. Feed Preparation: Runofmine material enters the rotating trommel (or vibrating grizzly) for initial scalping of +150mm oversize.
2. Attrition & Scrubbing: The log washer breaks down clay balls and soft stone, liberating sand particles.
3. Classification: The hydrosizer uses upward current water to separate sand into two distinct gradations (e.g., concrete sand vs. masonry sand) with a cut point accuracy of ±2%.
4. Dewatering: Highfrequency screens reduce moisture content to <12%, meeting immediate loadout specifications.
5. Water Recovery: Integrated hydrocyclones recover 90%+ of process water, reducing makeup water demand.

Application Scope: Ideal for alluvial deposits, riverbed mining, and crushed fines recovery. Limitations: Not designed for highly abrasive, highsilica feed (>95% quartz) without specific wear liner upgrades.

3. Core Features

HeavyDuty Log Washer Paddles | Technical Basis: Hightorque, counterrotating shaft design | Operational Benefit: Reduces clay content from 8% to <1% in a single pass | ROI Impact: Eliminates need for secondary scrubbing, saving $0.50/ton in energy and water costs

TeeterBed Hydrosizer | Technical Basis: Fluidized bed density separation | Operational Benefit: Produces two consistent sand products simultaneously, eliminating rescreening | ROI Impact: Increases marketable yield by 812% compared to screw classifiers

HighFrequency Polyurethane Screen Decks | Technical Basis: Variable frequency drive (VFD) control | Operational Benefit: Achieves 99% dewatering efficiency with zero blinding on wet, sticky material | ROI Impact: Reduces screen replacement frequency by 40% vs. woven wire

ISO 9001:2015 Certified Fabrication | Technical Basis: Robotic welding and stressrelieved frames | Operational Benefit: Predictable maintenance intervals and 50,000hour structural warranty | ROI Impact: Lowers unplanned downtime by 35% in continuous operation

Integrated Water Management System | Technical Basis: Closedloop cyclone and thickener circuit | Operational Benefit: Recycles 95% of process water, meeting environmental discharge permits | ROI Impact: Reduces water consumption by 1.2 million gallons per month for a 300 TPH plant

Modular SkidMounted Design | Technical Basis: Prepiped and prewired modules | Operational Benefit: Installation time reduced to 14 days vs. 6 weeks for sitebuilt systems | ROI Impact: Accelerates timetorevenue by 45 days

Remote Monitoring & PLC Control | Technical Basis: IoTenabled sensors with SCADA interface | Operational Benefit: Realtime tracking of tonnage, moisture, and power draw per product | ROI Impact: Enables predictive maintenance, reducing emergency repairs by 60%

4. Competitive Advantages

| Performance Metric | Industry Standard (Screw Classifier) | ISOCertified Sand & Gravel Solution | Advantage (% Improvement) |
| : | : | : | : |
| Fines Recovery (200 mesh) | 6570% | 9295% | +30% yield |
| Product Moisture Content | 1822% | 1012% | 45% drying cost |
| Changeover Time (product spec) | 46 hours | 45 minutes | 85% downtime |
| Water Consumption (per ton) | 1.5 m³/ton | 0.3 m³/ton | 80% water usage |
| Mean Time Between Failures | 800 hours | 2,400 hours | +200% reliability |
| Wear Part Cost (per ton) | $0.18/ton | $0.09/ton | 50% OPEX |

5. Technical Specifications

| Parameter | Specification |
| : | : |
| Model Capacity | 150 TPH, 300 TPH, 500 TPH (customizable) |
| Power Requirements | 250 kW – 750 kW (480V / 60Hz or 400V / 50Hz) |
| Feed Material | Alluvial sand & gravel, crushed fines, up to 15% clay content |
| Product Gradation | Two products: Concrete Sand (FM 2.33.1) & Masonry Sand (FM 1.52.0) |
| Physical Dimensions | 40m L x 15m W x 12m H (for 300 TPH module) |
| Operating Temperature | 20°C to 50°C (with coldweather package) |
| Material of Construction | AR400 wear liners, 304 stainless steel water pipes, polyurethane screens |
| Noise Level | <85 dB(A) at 1 meter (operator station) |

6. Application Scenarios

Riverbed Alluvial Mining (Southeast Asia) | Challenge: High clay content (12%) and variable water supply caused frequent screen blinding and inconsistent sand gradation. | Solution: Installed a 300 TPH ISOcertified plant with a heavyduty log washer and teeterbed sizer. | Results: Clay content reduced to 0.8%. Product moisture dropped to 11%. Plant achieved 94% uptime during monsoon season. Client reported a 22% increase in concrete sand sales due to consistent FM.

Crushed Fines Recovery (Quarry Operation, Midwest USA) | Challenge: Existing screw classifier lost 30% of 200 mesh fines to the settling pond, wasting 50 TPH of saleable material. | Solution: Retrofitted a fines recovery module (hydrocyclone + dewatering screen) from the ISOcertified line. | Results: Recovered 45 TPH of manufactured sand. Pond cleaning frequency reduced from quarterly to annually. ROI achieved in 11 months.

Modular Greenfield Plant (Contractor, Australia) | Challenge: Required a mobile, relocatable plant for a 2year mining lease with strict environmental water discharge limits. | Solution: Deployed a fully modular, skidmounted 150 TPH system with closedloop water recycling. | Results: Installed in 10 days. Zero water discharge achieved. Plant relocated to a second site in 5 days. Total project cost was 18% lower than a sitebuilt alternative.

7. Commercial Considerations

Equipment Pricing Tiers (FOB Port of Loading):

• Standard Package (150 TPH): $1.2M – $1.8M (includes basic PLC, no water treatment)
• Advanced Package (300 TPH): $2.5M – $3.5M (includes hydrosizer, water recovery, SCADA)
• Premium Package (500 TPH): $4.5M – $6.0M (includes full water management, remote monitoring, AR400 liners)

Optional Features:

• Coldweather package (heated screens, insulated piping): +$150k
• Highwear liner upgrade (ceramic tiles): +$80k
• Third product split (e.g., pea gravel): +$200k

Service Packages:

• Basic: 12month warranty, remote diagnostics, annual inspection
• Premium: 36month warranty, onsite commissioning engineer, quarterly wear audits, guaranteed 95% uptime



Financing Options:

• Equipment leasetoown (3660 months) with 10% residual
• Performancebased financing: Lower monthly payments tied to tonnage throughput targets

8. FAQ

Q: Can this system handle feed material with high moisture content (810%)?
A: Yes. The integrated log washer and highfrequency dewatering screens are designed for feed moisture up to 12%. The system’s water management circuit compensates for variable moisture without reducing throughput.

Q: What is the typical lead time for a 300 TPH ISOcertified plant?
A: Standard lead time is 1620 weeks from order confirmation. This includes fabrication, assembly, and factory testing. Expedited delivery (12 weeks) is available for select configurations.

Q: How does the system ensure compliance with ASTM C33 for concrete sand?
A: The teeterbed hydrosizer provides a cut point accuracy of ±2% on the critical 4 and 200 sieves. The PLC system logs every 15minute gradation sample, providing a traceable quality record for each load.

Q: What is the expected lifespan of the polyurethane screen decks?
A: Under normal operating conditions (abrasive index <30), polyurethane decks last 4,0006,000 hours. This is 34 times longer than woven wire screens, reducing replacement labor costs.

Q: Can the system be integrated with an existing crusher circuit?
A: Yes. The modular design includes standard conveyor interfaces. A site survey is conducted to match feed conveyor height and speed. The PLC can be integrated with existing plant DCS systems via Modbus or Ethernet/IP.

Q: What are the power consumption costs per ton?
A: Field data from a 300 TPH plant shows average power consumption of 1.8 kWh/ton. At $0.10/kWh, this equates to $0.18/ton in energy costs, which is 25% lower than comparable screw classifier systems.

Q: Is operator training included with the purchase?
A: Yes. The standard package includes 5 days of onsite operator training and a comprehensive digital manual. The Premium package includes a 2week training program covering maintenance, troubleshooting, and PLC programming.