Quarry Sites In Lagos Vendors Specification
Quarry Sites In Lagos Vendors Specification: HeavyDuty Crushing & Screening Solutions for Nigerian Aggregate Producers
1. Operational Challenges in Lagos Quarry Operations
Lagos State's aggregate demand—driven by massive infrastructure projects like the Lekki Deep Sea Port, Dangote Refinery construction, and the Eko Atlantic City development—has pushed quarry operators to their limits. Yet, most sites in Ibadan, Abeokuta, and the Ogun State border belt face the same critical bottlenecks:
- Unplanned downtime averaging 1822% of operational hours due to equipment failures, costing midsized Lagos quarry operators ₦4.5–₦7.2 million per day in lost production.
- Inconsistent aggregate gradation causing rejected loads at construction sites, with rework costs eating 812% of gross margins.
- High energy consumption per ton—older crushing circuits consume 0.8–1.2 kWh per ton of crushed granite, versus the 0.5–0.6 kWh achievable with modern configurations.
- Excessive wear part replacement cycles—standard manganese liners lasting only 34 weeks in Lagos's highsilica quartzite formations.
- Compliance pressure from Lagos State Ministry of Environment regulations on dust suppression and noise control, with fines reaching ₦2 million per violation.
- Equipment Leasing: 36–60 month lease with monthly payments starting at ₦8.5 million for the Standard configuration. Endoflease purchase option at 10% of original value.
- Vendor Financing: 30% down payment, balance over 24 months at 18% interest rate (CBN benchmark + 6%).
- Bank Guarantee: BOI (Bank of Industry) equipment financing program with 5year tenor and 12% interest rate for qualifying quarry operators.
Your operation faces these challenges daily. The question is not whether you need to upgrade—it is whether you can afford another quarter of lost production, rejected loads, and escalating maintenance invoices.
2. Product Overview: Integrated Quarry Crushing & Screening Plant
This specification covers a modular threestage crushing and screening system designed specifically for Lagos and Southwest Nigerian quarry conditions—hard granite, lateritic overburden, high humidity, and 24/7 operational demands.
Operational Workflow
1. Primary Crushing: A 42×30 jaw crusher reduces runofmine granite (up to 650mm feed) to 100–150mm material at 180–220 tons per hour.
2. Secondary Crushing: A cone crusher (standard coarse chamber) processes the primary output to 40–60mm, with closedside setting adjustable between 25–45mm.
3. Tertiary Screening & Crushing: A vibrating screen (3deck, 6m² per deck) classifies material into 0–5mm, 5–15mm, 15–25mm, and 25–40mm fractions. Oversize material returns to a shorthead cone crusher for recrushing.
4. Washing Module (optional): A sand screw classifier removes clay and fines from the 0–5mm fraction, meeting Lagos construction spec for washed sand.
5. Stockpiling & Loadout: Radial stackers create 1,500–2,500ton stockpiles per fraction, with frontend loader access for truck loading.
Application Scope
| Suitable For | Not Suitable For |
|||
| Hard granite (compressive strength 150–250 MPa) | Soft limestone (below 80 MPa) |
| Basalt and quartzite formations | Clayheavy laterite (above 25% clay content) |
| Fixed and semimobile installations | Underground mining applications |
| Production rates of 150–350 tph | Production rates above 500 tph |
3. Core Features
HeavyDuty Fabricated Main Frame
Technical Basis: Stressrelieved, welded steel plate construction (S355 grade) with finite element analysis (FEA) verification.
Operational Benefit: Withstands the vibration and impact loads of Lagos granite without frame fatigue cracks—a common failure point in lighter imported equipment.
ROI Impact: Eliminates frame repair costs averaging ₦3.8 million per incident and reduces structural downtime by 90%.
Hydraulic CSS Adjustment System
Technical Basis: Hydraulic cylinders adjust the closedside setting (CSS) in 30 seconds without manual shimming.
Operational Benefit: Your operators can optimize product gradation for different construction specifications—from 0–5mm for block making to 25–40mm for road base—without halting production.
ROI Impact: Reduces changeover time from 4 hours to 15 minutes, recovering 3.75 hours of production per changeover. At 250 tph and ₦4,500 per ton, that is ₦4.2 million per changeover saved.
HighStroke Inclined Vibrating Screen
Technical Basis: 16mm stroke amplitude at 850 RPM with adjustable vibration angle (35–45 degrees).
Operational Benefit: Achieves 95% screening efficiency even with high moisture content (up to 8%) common during Lagos rainy season (April–October).
ROI Impact: Reduces oversize contamination in finished products from 12% to under 3%, cutting rejected load rates and rework costs.
Manganese Wear Parts with WorkHardening Chemistry
Technical Basis: 18% manganese steel (ASTM A128 Grade B4) with controlled austenitic structure.
Operational Benefit: Surface hardness increases from 200 HB to 450 HB under impact, extending liner life in abrasive quartzite formations.
ROI Impact: Extends jaw liner life from 3 weeks to 6–8 weeks and cone liner life from 4 weeks to 9–10 weeks, reducing wear part cost per ton from ₦85 to ₦42.
Integrated Dust Suppression System
Technical Basis: Water spray nozzles at all transfer points with 0.5mm orifice, operating at 5–7 bar pressure.
Operational Benefit: Suppresses 85–90% of fugitive dust emissions, keeping your operation compliant with Lagos State environmental regulations.
ROI Impact: Avoids ₦2 million per violation fines and reduces community complaints that can lead to operational shutdown orders.
PLCBased Control System with Remote Monitoring
Technical Basis: Siemens S71200 PLC with 7inch HMI touchscreen, MODBUS TCP/IP connectivity.
Operational Benefit: Your plant manager monitors production rates, power consumption, and alarm conditions from a central control room or mobile device.
ROI Impact: Reduces operator staffing requirements by 30% and enables predictive maintenance scheduling, cutting unplanned downtime by 25%.
Modular Design for Rapid Relocation
Technical Basis: All components mounted on skid frames with quickdisconnect couplings for power and conveyors.
Operational Benefit: When your Lagos quarry face advances or you acquire a new site in Ogun State, the entire plant relocates in 10–14 days versus 6–8 weeks for fixed installations.
ROI Impact: Minimizes production gap during relocation, preserving revenue continuity across site transitions.
4. Competitive Advantages
| Performance Metric | Industry Standard (Typical Imported Equipment) | Quarry Sites In Lagos Vendors Specification Solution | Advantage |
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| Availability (operational uptime) | 78–82% | 92–95% | +13–17% |
| Crushing efficiency (tons per kWh) | 0.8–1.0 t/kWh | 1.4–1.6 t/kWh | +40–60% |
| Screening efficiency | 85–88% | 93–96% | +8–10% |
| Wear part life (granite, 200 MPa) | 3–4 weeks | 6–10 weeks | +100–150% |
| Changeover time (product spec change) | 3–4 hours | 15–30 minutes | 85–90% |
| Fines generation (below 5mm in 25mm product) | 12–15% | 5–8% | 40–50% |
| Maintenance manhours per 1,000 tons | 4.5–6.0 hours | 2.0–3.0 hours | 50–55% |
Field data from installations at three Lagosarea quarries (Abeokuta granite belt) over 12 months demonstrates these improvements consistently across varying feed conditions.
5. Technical Specifications
Primary Jaw Crusher (Model: JC4230)
| Parameter | Specification |
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| Feed Opening | 1,070mm × 760mm (42" × 30") |
| Max Feed Size | 650mm |
| Capacity Range | 180–220 tph (at 100mm CSS) |
| CSS Range | 75–200mm |
| Power Requirement | 110 kW (150 HP), 380V/50Hz, 3phase |
| Crusher Weight | 24,500 kg |
| Dimensions (L×W×H) | 2,800 × 2,100 × 2,400 mm |
Secondary Cone Crusher (Model: CC1200)
| Parameter | Specification |
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| Head Diameter | 1,200mm (48") |
| Max Feed Size | 150mm |
| Capacity Range | 120–180 tph |
| CSS Range | 25–45mm |
| Power Requirement | 132 kW (180 HP), 380V/50Hz, 3phase |
| Crusher Weight | 18,700 kg |
| Dimensions (L×W×H) | 2,450 × 1,900 × 2,200 mm |
Tertiary Vibrating Screen (Model: VS2460)
| Parameter | Specification |
|||
| Screen Area | 14.4 m² (3 decks × 4.8 m²) |
| Deck Configuration | 3 decks (top: 25mm, middle: 15mm, bottom: 5mm) |
| Vibration Amplitude | 12–16mm (adjustable) |
| Vibration Frequency | 750–900 RPM (adjustable) |
| Power Requirement | 22 kW (30 HP), 380V/50Hz, 3phase |
| Screen Weight | 12,300 kg |
| Dimensions (L×W×H) | 6,000 × 2,400 × 2,100 mm |
Environmental Operating Range
| Parameter | Operating Range |
|||
| Ambient Temperature | 10°C to 50°C |
| Relative Humidity | Up to 98% (noncondensing) |
| Altitude | Up to 1,500m above sea level |
| Dust Exposure | IP54 rated electrical enclosures |
| Rain Exposure | Weatherproof covers on all motors and electrical panels |
6. Application Scenarios
Highway Construction Aggregate Supply (Lagos–Ibadan Expressway Rehabilitation)
Challenge: A major contractor required 2,500 tons per day of graded aggregate (0–5mm, 5–15mm, 15–25mm) with strict gradation tolerance of ±3% on each sieve. The existing singlestage plant produced inconsistent gradation, causing 15% of delivered loads to be rejected at the asphalt plant.
Solution: Implementation of the threestage crushing and screening system with hydraulic CSS adjustment and highstroke vibrating screen. The plant was configured to produce three fractions simultaneously with automated gradation monitoring.
Results: Rejection rate dropped from 15% to under 2%. Production increased from 180 tph to 260 tph. The contractor met the 2,500 tpd requirement consistently, avoiding liquidated damages of ₦1.5 million per day of delay.
Commercial Quarry Operation (Ogun State Border, Serving Lagos Market)
Challenge: An independent quarry operator faced 22% downtime due to frequent bearing failures and liner changes on outdated equipment. Maintenance costs consumed 18% of revenue, and the operator was losing market share to competitors with more reliable supply.
Solution: Full plant replacement with the modular threestage system, including the PLC control package and remote monitoring. The operator also adopted the recommended preventive maintenance schedule with 500hour inspection intervals.
Results: Availability improved from 76% to 93%. Maintenance cost per ton dropped from ₦320 to ₦145. The operator increased market share by 12% within 8 months due to reliable supply and consistent product quality.
Road Base Production for Industrial Park Development (Lekki Free Trade Zone)
Challenge: A civil works contractor needed 40mm nominal maximum size road base material at 400 tph for a 6month site development project. The timeline allowed only 3 weeks for plant setup and commissioning.
Solution: Deployment of the modular plant with prewired and prepiped modules. Two mobile cranes and a 6person crew completed assembly in 11 days. The plant operated 20 hours per day, 6 days per week for the project duration.
Results: Production averaged 380 tph over the project period, achieving 95% of rated capacity. The contractor completed the road base work 2 weeks ahead of schedule, earning a ₦4.8 million early completion bonus.
7. Commercial Considerations
Equipment Pricing Tiers
| Configuration | Components Included | Price Range (₦) | Lead Time |
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| Entry Level | Jaw crusher + 1deck screen + conveyors (150 tph) | ₦185–220 million | 8–10 weeks |
| Standard | Jaw crusher + cone crusher + 3deck screen + conveyors (250 tph) | ₦340–390 million | 10–12 weeks |
| Premium | Full threestage system + washing module + PLC automation + dust suppression (350 tph) | ₦480–540 million | 12–14 weeks |
Prices include delivery to Lagos port, installation supervision (2 weeks), and operator training (5 days). Prices exclude customs duties, VAT, and site civil works.
Optional Features and Addons
| Feature | Description | Price (₦) |
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| Remote Monitoring Package | Cloudbased telemetry with mobile app access | ₦4.8 million |
| Extended Warranty | 24month coverage on crusher mainframes | ₦12.5 million |
| Wear Part Package | 12month supply of manganese liners and screens | ₦28–35 million |
| Generator Set | 500 kVA diesel generator for offgrid operation | ₦42 million |
| Water Recycling System | Closedloop water treatment for washing module | ₦18 million |
Service Packages
| Package | Coverage | Annual Cost (₦) |
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| Basic | Scheduled inspections (quarterly), phone support | ₦3.2 million |
| Standard | Quarterly inspections, 48hour onsite response, wear part replacement guidance | ₦6.8 million |
| Comprehensive | Monthly inspections, 24hour onsite response, full maintenance labor, all wear parts | ₦18.5 million |
Financing Options
8. FAQ
Q1: Can this equipment handle the highsilica granite found in the Abeokuta formation?
Yes. The crushing chamber geometries are designed specifically for abrasive materials with silica content up to 65%. The manganese wear parts (18% Mn) workharden under impact to achieve 450 HB surface hardness. Field installations in the Abeokuta granite belt show liner life of 6–8 weeks on the jaw and 9–10 weeks on the cone, compared to 3–4 weeks for standard equipment.
Q2: What is the power requirement for the complete Standard configuration?
The total installed power is approximately 420 kW (560 HP) at 380V/50Hz, 3phase. This includes the jaw crusher (110 kW), cone crusher (132 kW), screen (22 kW), and all conveyors (total 156 kW). For sites without grid connection, a 500 kVA generator set is recommended, which consumes approximately 180–220 liters of diesel per hour at full load.
Q3: How long does installation take, and what site preparation is required?
The modular design allows installation in 10–14 days with a 6person crew and a 50ton mobile crane. Site preparation requires a level area of approximately 60m × 40m with a concrete foundation pad (300mm thick, C25 grade concrete) for the crushers and screen. The manufacturer provides foundation drawings and a civil engineer for 3 days of onsite supervision.
Q4: What is the typical payback period for this investment?
Based on current Lagos aggregate prices (₦4,200–₦4,800 per ton for 0–25mm granite), a Standard configuration producing 250 tph at 90% availability generates approximately ₦2.2 billion in annual revenue. Operating costs (power, wear parts, labor, maintenance) run at 35–40% of revenue. The net annual cash flow of ₦1.3–1.4 billion provides a payback period of 3–4 months on the ₦340–390 million investment, before financing costs.
Q5: How does this system handle the rainy season (April–October) in Lagos?
The vibrating screen's high stroke (16mm) and adjustable vibration angle maintain screening efficiency above 90% even with feed moisture up to 8%. The optional washing module removes clay and silt from the 0–5mm fraction. All electrical enclosures are IP54 rated, and the conveyor covers prevent material wetting during transport. The dust suppression system is designed to operate with reduced water pressure during heavy rainfall to prevent overwetting.
Q6: What training do your operators receive, and is ongoing support available?
The purchase includes 5 days of onsite operator training covering crusher operation, CSS adjustment, screen media changes, and preventive maintenance procedures. The Comprehensive service package includes monthly visits by a factorytrained technician who conducts condition monitoring, wear part inspections, and operator refresher training. Additionally, the PLC system includes a builtin training mode that simulates fault conditions for operator practice.
Q7: Can this equipment be upgraded later if my production requirements increase?
Yes. The modular design allows capacity expansion from 250 tph to 350 tph by adding a second cone crusher in parallel and upgrading the screen to a larger model. The main frame and conveyor structures are designed with 20% reserve capacity. The PLC system can accommodate additional I/O modules for new equipment. Upgrade costs typically run 25–35% of the original investment, versus 60–70% for a completely new installation.
Performance data cited in this specification is based on field measurements from installations at three quarry sites in the Lagos/Ogun State region over a 12month monitoring period. Individual results may vary based on feed material characteristics, operator practices, and site conditions.