1. PAINPOINT DRIVEN OPENING

Managing a sand and gravel operation requires more than just moving material; it demands precision, consistency, and cost control. Are you facing these persistent challenges?

Inconsistent Feed Material: Fluctuations in moisture content, clay contamination, and oversized rocks lead to frequent crusher and screen blockages, causing unplanned downtime that costs thousands per hour in lost production.
High Operational Costs: Excessive fuel consumption from inefficient material handling, coupled with the high wear rates of components not designed for abrasive environments, erodes your profit margins.
Product Quality Variability: Inability to precisely separate fines or consistently meet tight aggregate specifications results in product rejection, reduced selling price, and damaged customer relationships.
Environmental & Regulatory Pressure: Managing dust emissions and ensuring operations comply with local environmental regulations requires significant investment and ongoing attention, diverting resources from core production.

How do you achieve consistent throughput of specification material while controlling operational costs and maintaining compliance? The foundation of the solution lies in selecting the right primary processing equipment.

2. PRODUCT OVERVIEW: ROHS COMPLIANT SAND & GRAVEL SCALPING SCREEN

A ROHS Compliant sand and gravel scalping screen is a heavyduty vibrating screen deployed at the front end of your processing plant. Its primary function is to remove undersized material (natural sand and fines) and contaminants before the raw feed enters primary crushing circuits. This prescreening is critical for optimizing overall plant efficiency.

Operational Workflow:
1. Raw, runofpit material is fed onto the robust deck of the ROHS compliant scalping screen.
2. Highintensity vibration stratifies the material, forcing fines through the screen media while conveying oversize to the discharge end.
3. Separated undersize (natural sand) is diverted to a bypass conveyor for direct stockpiling or further washing.
4. Oversize gravel and rock are cleanly discharged into the primary crusher feed hopper.
5. This process significantly reduces crusher load, eliminates unnecessary wear on crushing chambers, and improves final product yield.

Application Scope & Limitations:
This equipment is designed for hightonnage primary separation in sand and gravel pits, alluvial deposits, and construction & demolition recycling operations. It is most effective on materials with a significant percentage of subscreensize particles. Its limitations include processing heavily claybound materials without prescreening or washing attachments, which may require additional modular solutions.

3. CORE FEATURES

ROHS Compliant Componentry | Technical Basis: Elimination of restricted hazardous substances (Lead, Cadmium, Mercury, etc.) in electrical components, paints, and lubricants | Operational Benefit: Futureproofs your investment against tightening global environmental regulations and simplifies endoflife equipment disposal | ROI Impact: Mitigates risk of costly retrofits or noncompliance penalties in regulated markets.

HeavyDuty Plate Feeder Interface | Technical Basis: Integral flanged connection for apron or vibrating plate feeders ensures controlled feed rate and even distribution across full screen width | Operational Benefit: Eliminates feed surge loads that cause screen media blinding and premature bearing stress | ROI Impact: Increases screening efficiency by up to 15% and extends bearing service life by an estimated 30%.

Modular Screen Media System | Technical Basis: Boltin tension rails allow for rapid panel changeout with multiple media types (piano wire, polyurethane, rubber) | Operational Benefit: Your operators can adapt to varying feed material in under two hours, minimizing downtime for configuration changes | ROI Impact: Reduces media change labor costs by 50% compared to traditional hookandwedge systems.

DualVibration Exciter Drive | Technical Basis: Two synchronized exciters provide linear vibration force with adjustable amplitude via bolton counterweights | Operational Benefit: Delivers consistent material travel speed and stratification for reliable separation efficiency regardless of load variance | ROI Impact: Provides stable performance that improves product consistency yield by an average of 812%.

Sealed Dust Enclosure Canopy | Technical Basis: Fulllength galvanized steel covers with rubber sealing gaskets contain dust at major transfer points | Operational Benefit: Dramatically reduces airborne particulate matter at the plant's primary intake point, aiding in permit compliance | ROI Impact: Lowers water consumption for dust suppression by approximately 40% and reduces associated cleanup labor.

Centralized Greasing Lube Points | Technical Basis: Hardplumbed lubrication lines routed from exciter bearings to accessible bank of grease nipples at ground level| Operational Benefit Enables safe daily maintenance checks without requiring access to moving parts or elevated platforms| ROI Impact Promotes proactive maintenance preventing catastrophic bearing failure which can cause over $48k in downtime repairs

4 COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard | ROHS Compliant Scalping Screen Solution | Advantage (% improvement) |
|||||
| Screening Efficiency | 8590% on dry feed | Consistent 9295% efficiency | +5% Product Yield |
| Bearing Life (L10) | ~12 000 operating hours | >16 000 operating hours | +33% Service Life |
| Media ChangeOut Time | 46 hours for full deck | <2 hours with modular system | 60% Downtime |
| Dust Emissions at Feed Point| Reliant on external spray systems | Contained via sealed canopy | 70% Airborne Particulate |
| Regulatory Preparedness May require component substitution for certain markets Certified ROHS compliance across all applicable components Mitigates future retrofit cost risk |

5 TECHNICAL SPECIFICATIONS

Model Range Capacities: From 600 TPH to 2 200 TPH depending on aperture size feed gradation
Power Requirements: Dual exciter motors from 2 x 30 kW up to 2 x 75 kW (400V/50Hz or customized)
Deck Configuration: Single deck heavyduty; optional cascading double deck
Screen Media Options: Hightensile steel wire mesh (40mm150mm) polyurethane panels rubberclad panels
Physical Dimensions (Typical): Widths from 2m up to m; lengths from m up to m
Operating Temperature Range: 20°C to +45°C with standard lubricants; Arctic packages available
Structural Steel Specification: Main frame fabricated from S355JR grade steel; abrasionresistant liners on feedbox

6 APPLICATION SCENARIOS

Large Aggregate Producer Pacific Northwest Challenge A new site contained high variability in natural sand content (25%60%) causing constant plugging of the jaw crusher leading to daily downtime Solution Installation of a ROHS compliant scalping screen fitted with mm polyurethane panels ahead of the crushing circuit Results Crusher plugging eliminated throughput increased by a consistent % allowing plant to meet new highway contract specs Natural sand bypass created a new saleable product stream

Urban C&D Recycling Operator Challenge Processing demolition concrete required removal fine dirt wood debris before secondary crushing Contaminants caused excessive wear on downstream conveyors compromised recycled aggregate quality Solution A heavyduty ROHS compliant screen with aggressive linear stroke separated fines contaminants prior impact crusher Results Clean oversize feedstock reduced wear rates on crusher blow bars conveyor belts by Final product achieved higher purity premium market price

7 COMMERCIAL CONSIDERATIONS

ROHS compliant sand gravel scalping screens are capital investments structured around throughput capacity drive configuration

Pricing Tiers Entrylevel models (1800 TPH) are projectquoted
Optional Features Include integrated spray bars for sticky material rubbercoated side plates noise reduction enclosures wireless vibration monitoring sensors remote greasing systems
Service Packages Standard warranty covers defects months operating hours Proactive packages include scheduled bearing inspections vibration analysis training Extended support contracts provide guaranteed parts availability fixed annual maintenance cost
Financing Options Available through partner institutions include equipment leasing longterm rental purchase plans seasonal payment structures tailored project cash flow

8 FAQ

Q How does ROHS compliance affect spare parts availability cost
A It does not negatively impact availability All electrical mechanical spares remain standard inventory items The compliance pertains materials composition not part design Leading manufacturers maintain global supply chains ensure no delay

Q Can this screen handle very wet or claybound material effectively
A While robust screens function best moderately moist materials Significant clay content requires prescreening washing We offer modular addons like rinser decks log washers integrate seamlessly feed conveyor system discuss specific application

Q What measurable efficiency gain should expect my overall plant
A Field data shows installing primary scalping screen typically increases total plant throughput reduces crusher power consumption per ton The exact figure depends current setup but operators report range improvements based eliminating recirculating load

Q Are financing options available international buyers
Yes we work network international export credit agencies financial institutions structure solutions accommodate letters credit currency considerations longterm leases Contact commercial team discuss specific country requirements

Q What typical installation commissioning timeline involve
A For turnkey scope including foundation design delivery erection commissioning typical project timeline weeks following design approval We provide detailed foundation drawings supervise installation ensure optimal performance