1. PAINPOINT DRIVEN OPENING

Are your aggregate production targets consistently derailed by inconsistent feed material from your Lagos quarry site? For commercial quarry operators and exporters, managing the primary crushing stage is a critical bottleneck that directly impacts profitability. Common challenges include:
Excessive Downtime: Frequent blockages and bridging in the primary crusher feed hopper, leading to hours of lost production per week for cleaning and reestablishing flow.
High Maintenance Costs: Uncontrolled, oversized material entering the primary crusher causes undue stress on components, resulting in premature wear on liners, bearings, and shafts.
Inconsistent Throughput: Variable feed size from the face leads to a choked or starved crusher, preventing your plant from operating at its designed capacity and efficiency.
Safety and Labor Risks: Manual methods to clear blockages or break oversize rock expose personnel to significant hazard.

How do you ensure a consistent, optimallysized feed to your primary jaw crusher that maximizes uptime, protects your capital equipment, and stabilizes your output for exportgrade aggregate specifications?

2. PRODUCT OVERVIEW: APG4216 VIBRATING GRIZZLY FEEDER (VGF)

The APG4216 is a heavyduty Vibrating Grizzly Feeder (VGF) engineered for the primary separation and feeding of runofquarry material in Lagos's demanding laterite and granite operations. It is the definitive solution for preparing material before the primary crusher.

Operational Workflow:
1. Receiving & PreScreening: Dump trucks discharge raw quarry run onto the robust feeder pan. The integral grizzly section (with adjustable openings) allows subfines (e.g., 100mm) to bypass the crusher, reducing immediate load.
2. Separation & Conveyance: The vibrating action conveys larger material forward while simultaneously stratifying the load.
3. Controlled Feeding: Oversize rock is smoothly delivered at a regulated rate into the jaw crusher inlet, ensuring it operates within its optimal design parameters without shock loading or starvation.

Application Scope & Limitations:
Scope: Ideal for mediumtohigh tonnage quarry primary sections; handles blasted rock, heavy claybound materials, and demolition concrete. Suited for both fixed plant and semimobile setups common in Lagos export operations.
Limitations: Not designed as a standalone screening plant for precise final product sizing. Maximum lump size is limited by physical deck dimensions; extremely sticky, highmoisture clay without preprocessing can reduce efficiency.

3. CORE FEATURES

HeavyDuty Deck Construction | Technical Basis: Highstrength steel plate with boltin AR400 liners | Operational Benefit: Withstands direct impact from large blasted rock with minimal deformation or wear | ROI Impact: Reduces replacement deck costs by up to 40% over standard plate, extending service life.

Adjustable Grizzly Bars | Technical Basis: Individually mounted, replaceable manganese steel bars with variable spacing | Operational Benefit: Allows operators to set optimal bypass size (e.g., 80150mm) to match crusher settings and material type | ROI Impact: Increases effective crusher throughput by removing fines, directly lowering costpertonne crushed.

Dual Shaft Vibrator Mechanism | Technical Basis: Two synchronized eccentric shafts generating a linear stroke | Operational Benefit: Provides positive material propulsion even under headloads; minimizes plugging in wet conditions | ROI Impact: Field data shows a 25% reduction in feedrelated downtime compared to single shaft designs.

Variable Speed Drive (VFD) Control | Technical Basis: Integrated motor controller regulating vibrator amplitude/feed rate | Operational Benefit: Enables realtime tuning of feed rate from the control panel to match downstream crusher performance | ROI Impact: Optimizes plant balance, preventing crusher overload and improving power efficiency across the circuit.

BoltTogether Modular Design | Technical Basis: Preengineered subassemblies for core structure | Operational Benefit: Simplifies transport through Lagos ports and onsite assembly with standard tools | ROI Impact: Cuts installation time and cost by approximately 30%, accelerating commissioning for export projects.

Centralized Greasing Points | Technical Basis: Labyrinthsealed bearing housings with accessible grease nipples | Operational Benefit: Enables safe, routine maintenance without disassembly during scheduled stops | ROI Impact: Extends vibrator bearing life expectancy beyond 12,000 hours under typical quarry conditions.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard Solution | APG4216 VGF Solution | Advantage (% Improvement) |
| : | : | : | : |
| Availability / Uptime | Static grizzly with excavator assist for blockages | Continuous vibrating action with controlled feed rate. No stoppages for bridging. | +18% Crusher Utilization |
| Wear Part Cost per Tonne| Standard carbon steel deck liners requiring annual replacement| Boltin AR400 liners on critical impact zones with 3year typical life cycle| 35% Annual Liner Cost |
| Feed Rate Consistency| Manual excavator feeding or fixedrate apron feeder| VFDcontrolled vibration allows +/ 10% feed rate adjustment onthefly| Delivers +95% Crusher Feed Consistency |
| Fines Removal Efficiency| Minimal prescreening leading to crusher cavity packing| Adjustable grizzly section removes defined fines prior to crushing| Reduces Crusher Load by 1525% |

5. TECHNICAL SPECIFICATIONS

Model: APG4216 Vibrating Grizzly Feeder
Capacity Rating: Up to 600 tonnes per hour (TPH), depending on material density and grizzly setting.
Grizzly Section: 4.2m long x 1.6m wide; 9 individually adjustable bars; standard opening range 80mm 150mm.
Deck Pan Length: 3.0m following grizzly section.
Total Power Requirement: 30 kW electric motor with IP66 protection rating.
Vibration Mechanism: Twin shaft, fourbearing system; stroke adjustable between 812mm.
Construction: Main frame fabricated Hbeams; Deck 20mm thick base plate with bolton wear liners.
Physical Dimensions (LxWxH): Approx. 8.5m x 2.4m x 1.8m.
Environmental Operating Range: Designed for ambient temperatures of 15°C to 45°C and high humidity conditions typical of Lagos.

6. APPLICATION SCENARIOS

Granite Quarry Primary Crushing Station Upgrade

Challenge A granite quarry supplying aggregates for export concrete piles faced constant jaw crusher overload due to uncontrolled feed from dump trucks, causing tramp iron damage and unplanned stops every two weeks.
Solution Installation of an APG4216 VGF with grizzly set at 120mm was implemented as a buffer between truck tipping and the jaw crusher inlet.
Results The system removed an average of 22% fine waste rock prior to crushing. Crusher overload events were eliminated, liner life increased by 50%, and overall plant throughput rose by a verified 19%.

Laterite Processing Plant Efficiency Improvement

Challenge A laterite processing plant experienced severe blockages in their primary circuit during the rainy season due to sticky clay binding in the feeder hopper.
Solution The APG4216 was selected for its aggressive linear stroke capable of breaking up cohesive materials via vibration energy transfer through the bed depth.
Results Plant managers reported zero complete blockages postinstallation during wet season operations through two cycles.Feed consistency improved,supporting stable operation of downstream washing screens.

7.COMMERCIAL CONSIDERATIONS

Equipment pricing is structured around configuration:
Tier 1 Base Model APG 4216 includes standard duty vibrators,motor starter,and manual greasing points
Tier 2 Production Model adds Variable Frequency Drive VFD ,centralized auto lube system,and abrasion resistant AR400 liner kit
Tier 3 Severe Duty Model includes all above plus extra heavy duty shaft assemblies,dust sealing kits,and polyurethane side liners

Optional Features include:
Rock box extension hoppers
Dust suppression spray bars
Radio remote control for start stop
Spare parts kits bearing sets,grizzly bars

Service Packages available:
Standard warranty covering parts defects
Extended performance assurance plan including scheduled inspections
Full maintenance contract covering all wear parts labor

Financing Options tailored for commercial buyers include equipment leasing structures,trade in programs for existing feeders,and project based financing aligned with export contract milestones

8.FAQ

Q Can this feeder be integrated into my existing primary crushing setup designed around an excavator fed hopper?
A Yes.The modular design allows it be fitted ahead most jaw or gyratory crushers replacing static receiving hoppers Engineering drawings are required ensure proper interface geometry load support

Q What is expected power consumption impact adding this unit my plant?
A The unit operates on kW motor Under full load typical additional energy cost per tonne processed is negligible compared gains overall circuit efficiency reduced downstream crusher power draw

Q How does handle very wet sticky material common during rainy season?
A The dual shaft mechanism generates high G force linear stroke proven break cohesion clays For extreme conditions optional polyurethane deck covers reduce adhesion further

Q What are lead times delivery installation support within Lagos Ogun state region?
A Standard units are available within weeks from regional stock Technical supervisors available oversee commissioning ensure correct operational setup

Q Are spare parts readily available locally avoid long import delays?
A Critical wear parts like grizzly bars deck liners standardized vibrator bearings stocked local distributor network Guaranteed availability key components