1. PAINPOINT DRIVEN OPENING

Are escalating operational costs and unpredictable downtime eroding your sand and gravel margins? Managing a modern aggregate operation presents distinct challenges that standard equipment often fails to address. Consider these common, costly scenarios:
High Wear & Maintenance Costs: Abrasive silica and gravel rapidly degrade standard components, leading to frequent, unscheduled shutdowns for liner changes, pump rebuilds, and conveyor belt replacements.
Inconsistent Final Product Quality: Fluctuations in feed material cause offspec product—fines content too high or particle distribution out of grade—resulting in rejected loads and lost revenue.
Inefficient Water & Sludge Management: Ineffective washing and clarification systems waste process water, create environmental compliance hurdles, and lose valuable fines to settling ponds.
Low Overall Plant Efficiency: Bottlenecks at crushing, screening, or material handling stages limit total throughput, preventing you from capitalizing on highdemand periods.

What if your key processing equipment was engineered from the ground up to confront these specific abrasion, classification, and reliability challenges? The solution lies in partnering with a specialized contract manufacturer for your core sand gravel mining equipment.

2. PRODUCT OVERVIEW

This content details a comprehensive line of stationary and modular sand washing, classification, and dewatering equipment manufactured under contract for sand and gravel mining operations. As your contract manufacturer, we engineer and build the core machinery that transforms raw feed into specification aggregate.

Operational Workflow:
1. Feed & Distribution: Crushed material is evenly distributed into the washing system.
2. Attrition & Liberation: Rotating paddles or screws scrub particles to break down clay clots and liberate fines from coarse aggregate.
3. Hydraulic Classification: Precise water flow rates separate particles by size and specific gravity in settling tanks or hydrocyclones.
4. Mechanical Dewatering: Screws or vibratory decks remove excess water from fine and coarse products to meet shipping moisture specifications.
5. Fines Recovery & Water Management: Integrated cyclones and thickeners capture ultrafine particles for byproduct sale while clarifying water for recirculation.

Application Scope: Ideal for virgin aggregate processing, crushed stone rewashing, and construction/demolition material recycling. Primary limitations include maximum feed size (typically ≤1”) and the requirement for a consistent water supply; dry processing solutions are configured separately.

3. CORE FEATURES

Polyurethane Wear Components | Technical Basis: Advanced elastomer casting with high tear strength | Operational Benefit: Outlasts standard rubber liners by 300500% in abrasive silica applications | ROI Impact: Reduces component changeout frequency by over 60%, lowering parts inventory costs and maintenance labor hours.

Variable Frequency Drive (VFD) Control | Technical Basis: Precision AC motor speed regulation via programmable logic controller (PLC) | Operational Benefit: Operators can instantly adjust screw speed or slurry density in response to feed changes | ROI Impact: Maintains onspec product yield, reducing waste by an average of 15% as per field data.

Unified Rinse Water System | Technical Basis: Pressurized manifold distributing clarified water across final rinse screens | Operational Benefit: Ensures thorough cleansing of final product without increasing fresh water consumption | ROI Impact: Lowers fresh water makeup requirements by up to 30%, reducing pumping costs and environmental footprint.

BoltTogether Modular Chassis | Technical Basis: Fabricated structural steel design with predrilled connection points | Operational Benefit: Enables rapid site relocation or plant reconfiguration with minimal cutting/welding | ROI Impact: Cuts redeployment time by 50%, allowing faster response to shifting deposit locations.

Integrated Cyclone Cluster Packages | Technical Basis: Bank of smalldiameter hydrocyclones for highG force separation | Operational Benefit: Recovers ultrafine sand (100400 mesh) from waste streams for sale as a byproduct | ROI Impact: Adds a new revenue stream; typical plants report payback on this module in under 12 months.

Centralized Grease Lubrication System | Technical Basis: Automated manifold delivering grease to all critical bearings on timed intervals | Operational Benefit: Eliminates manual greasing points in hardtoreach locations, ensuring optimal bearing life | ROI Impact: Documented reduction in bearingrelated failures by over 80%, protecting against catastrophic downtime.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard Benchmark | Our Sand Gravel Mining Contract Solution | Documented Advantage |
| : | : | : | : |
| Liner Life in Abrasive Silica Sand | 750 1,000 operating hours | 3,000 4,000 operating hours (Polyurethane) | +300% improvement |
| Fresh Water Consumption per Ton Processed| ~100 gallons/ton (open loop) | ~70 gallons/ton (closedloop system) | 30% reduction |
| Fine Material Recovery (92% recovery to product stream (with cyclone pack) | +27 percentage points |
| Mean Time Between Failure (MTBF) Critical Drives| ~2,000 hours| >4,500 hours (with VFD & centralized lube)| +125% improvement |
| OnSpec Product Consistency (Gradation)| ±5% variation from target sieve| ±2% variation from target sieve (with VFD control)| Variance reduced by 60% |

5. TECHNICAL SPECIFICATIONS

Model Range Capacity: From 50 TPH pilot/test units to highvolume 450 TPH production plants.
Power Requirements: Plantdependent; typical single module ranges from 75 HP to 250 HP total connected load at 480V/3Phase/60Hz (other voltages configurable).
Material Specifications: Primary wear components constructed from ASTMrated abrasionresistant steel (>400 BHN), cast polyurethane (>95A Durometer), and ceramic linings in ultrahigh wear zones.
Physical Dimensions (Typical Single Screw Washer): Length: ~35’, Width: ~10’, Height: ~15’. Modular design allows for stacking or sidebyside placement.
Environmental Operating Range: Designed for ambient temperatures from 20°C to +50°C (4°F to 122°F). Dust enclosures and heated bearing options available for extreme environments.

6. APPLICATION SCENARIOS

Commercial Sand Producer – Midwest USA

Challenge: A producer faced significant profit loss due to high silt/clay content contaminating final concrete sand products, leading to frequent customer rejections.
Solution: Implementation of a highcapacity fine material washer with an integrated attrition cell and cyclonebased fines recovery system.
Results: Reduced deleterious materials content from >6% to <0.5%. The recovered fines were sold as a filler material. Overall plant profitability increased by an estimated $12/ton on washed concrete sand.

Alluvial Gravel Pit Operator – Western Canada

Challenge: Seasonal freezing conditions caused severe downtime during spring thaw due to sedimentladen process water that could not be effectively clarified for recirculation.
Solution: Contract manufacturing of a modular washing plant featuring a highcapacity deep cone thickener for rapid solids settling and sludge densification.
Results: Achieved closedloop water recycling within 48 hours of seasonal startup versus the previous twoweek average. Reduced fresh water procurement costs by over $45,000 annually and ensured consistent earlyseason production.

7. COMMERCIAL CONSIDERATIONS

Our contract manufacturing model provides flexibility tailored to your operational scale:
Pricing Tiers: Based on capacity (TPH) and complexity—from standard singlescrew washer packages (300 TPH).
Optional Features / Upgrades: Common upgrades include automated polymer dosing systems for fines flocculation , remote monitoring telematics packages , spare parts starter kits ,and custom discharge chute configurations .
Service Packages: Choose from annual preventative maintenance inspections , guaranteed parts availability programs with defined SLAs ,and ondemand technical support .
Financing Options: We work with thirdparty financial institutions who specialize in heavy equipment financing . Solutions include capital leases , operating leases ,and leasetoown structures designed around project cash flow .

8. FAQ

Q1: Is your equipment compatible with our existing crushing plant setup?
Yes . Our systems are designed as both standalone plants or as bolton modules . We require your existing plant’s discharge conveyor height , feed rate ,and available power specifications . Our engineering team will provide detailed interface drawings .

Q2:What is the expected impact on our overall plant throughput?
By eliminating bottlenecks at the washing stage , most operations see an increase in total usable output . Field data shows plants often realize a net gain of between1020 %in salable tons per hour due reduced waste material handling .

Q3:What are typical lead timesfor contractmanufactured equipment?
Lead times varyby complexity . For standard designs we maintain partial inventoryof key components ;typical delivery is1418 weeksfrom order approval . Custom engineered solutions require2226 weeksfor full fabrication assembly testing .

Q4:What commercial terms do you offer?
Standard commercial terms involvea progress payment schedule tiedto major manufacturing milestones :30 %upon order40 %upon major fabrication completion25 %upon completionof factory acceptance testing5 %upon shipment .

Q5:What levelof operator trainingis provided?
We include comprehensive onsite trainingfor both operationsand maintenance crewsas partof commissioning This covers normal startup/shutdown procedures routine maintenance troubleshooting guidesand safety protocols Documentation includesfull electrical schematics parts manuals lubrication schedules

Q6:Canyour systems handle recycled concreteor asphalt millings(RAP)?
Yes but this requires specific configuration Heavily soiledor contaminated C&D debris often needs enhanced attrition scrubbing We recommend providinga sampleof your feedstockfor pilot testingto determine the optimal machine parameters

Q7:Doyou provide performance guarantees?
We provide mechanical performance guaranteescovering workmanship materials Additionally we can establish process performance criteria basedon pilot test resultsor agreedupon feed specifications These are detailed within the commercial proposal