Commercial Quarry Sites In Lagos Specification

1. PainPoint Driven Opening

Operating a commercial quarry in Lagos presents three persistent operational challenges: irregular aggregate quality from inconsistent blasting and crushing, unplanned downtime exceeding 18% annually due to equipment wear from highsilica granite, and logistics bottlenecks from congested access routes to sites in Ibadan Expressway corridor or Epe. These factors collectively reduce effective production capacity by up to 25%, costing operators ₦24 million per lost shift in a 200tonneperhour plant. Are your screening decks blinding on wetseason laterite? Is your tertiary crusher producing more fines than 19mm chippings? Does your loading cycle exceed 4 minutes per 30tonne truck? The right specification for your Lagos quarry site equipment directly addresses these yield and throughput gaps.

2. Product Overview

This specification defines the primary jaw crushing and secondary cone crushing circuit for a 250tonneperhour (tph) commercial quarry site in Lagos, processing granite with a compressive strength of 180220 MPa and an abrasion index of 0.450.55.

Operational Workflow:
1. Feed: Runofmine material (0800mm) from dump truck into vibrating grizzly feeder (1200mm x 5000mm) with 50mm grizzly spacing.
2. Primary Crushing: Jaw crusher (C120 type, 1200mm x 870mm feed opening) reduces to 150200mm.
3. Secondary Crushing: Cone crusher (HP400 type, 400hp) reduces to 2040mm with closed side setting of 25mm.
4. Screening: Tripledeck vibrating screen (2400mm x 6000mm) producing 05mm (dust), 512mm (granite chips), 1219mm (chippings), 1925mm (base course).
5. Stockpiling: Radial stacker conveyors (24m length, 800mm belt width) for each product fraction.

Application Scope: Suitable for greenfield or brownfield sites with 510 hectares of operational area. Limitations: Not designed for limestone (below 120 MPa) or highly weathered laterite; requires dedicated water spray system for dust suppression above 30% moisture content.

3. Core Features

HeavyDuty Jaw Die Configuration | Technical Basis: Manganese steel (1214% Mn) with reversible tooth profile | Operational Benefit: Reduces wear rate by 22% compared to standard 11% Mn dies in Lagos granite | ROI Impact: Extends die life from 180 to 230 operating hours, saving ₦1.8 million per year in replacement costs

Hydroset Cone Adjustment System | Technical Basis: Hydraulic cylinder with accumulator maintains constant closed side setting under load | Operational Benefit: Eliminates manual shim adjustment, reduces setting time from 45 minutes to 3 minutes | ROI Impact: Increases uptime by 4.2%, equivalent to 1,200 additional tonnes per month

TripleDeck Screen with Polyurethane Panels | Technical Basis: Modular polyurethane panels with 40% open area versus 35% for wire mesh | Operational Benefit: Reduces blinding on 5mm deck by 60% during wet season (MayOctober) | ROI Impact: Maintains 95% screening efficiency versus 78% for wire mesh, reducing recirculation load by 12%

Integrated Dust Suppression System | Technical Basis: Nozzle array at crusher discharge and screen feed points, 0.5mm droplet size at 6 bar pressure | Operational Benefit: Meets Lagos State environmental regulation (PM10 below 150 µg/m³) without baghouse | ROI Impact: Avoids ₦500,000 daily fines and potential 7day site closure

Variable Frequency Drive (VFD) on Conveyors | Technical Basis: 30kW VFD on main feed conveyor, 15kW on product conveyors | Operational Benefit: Reduces startup current by 60%, allows softstart for belt protection | ROI Impact: Cuts electricity cost by 18% (₦2.3 million annually at ₦65/kWh) and extends belt life by 15%

Automatic Lubrication System | Technical Basis: Centralized grease pump with 8point distribution, 12hour reservoir | Operational Benefit: Eliminates manual greasing of 14 bearing points, reduces labour requirement by 1 operator per shift | ROI Impact: Saves ₦1.2 million annually in labour and reduces bearing failure by 40%

Remote Monitoring Package | Technical Basis: PLC with GSM modem, monitoring crusher amps, bearing temperature, and belt speed | Operational Benefit: Alerts plant manager via SMS when cone crusher exceeds 90°C bearing temperature | ROI Impact: Prevents catastrophic bearing failure (₦4.5 million replacement cost) and reduces unplanned downtime by 35%

4. Competitive Advantages

| Performance Metric | Industry Standard (200tph plant) | This Lagos Quarry Specification | Advantage (% improvement) |
| : | : | : | : |
| Throughput (tonnes/hour) | 200 | 250 | +25% |
| Product Fines (below 5mm) | 18% | 12% | 33% (reduction) |
| Uptime (hours/month) | 620 | 680 | +9.7% |
| Wear Cost per Tonne (₦) | 45 | 32 | 28.9% |
| Energy Consumption (kWh/tonne) | 1.8 | 1.4 | 22.2% |
| Screen Efficiency (wet season) | 78% | 95% | +21.8% |
| Dust Emission (PM10 µg/m³) | 280 | 120 | 57.1% |

5. Technical Specifications

| Parameter | Specification |
| : | : |
| Primary Jaw Crusher | Feed opening: 1200mm x 870mm; Capacity: 200300 tph; Motor: 160kW, 1500 rpm; Weight: 42 tonnes |
| Secondary Cone Crusher | Max feed: 200mm; Closed side setting: 2040mm; Motor: 300kW, 1480 rpm; Weight: 28 tonnes |
| Vibrating Grizzly Feeder | Width: 1200mm; Length: 5000mm; Motor: 15kW; Grizzly spacing: 50mm |
| TripleDeck Screen | Width: 2400mm; Length: 6000mm; Motor: 30kW; Decks: 5mm, 12mm, 19mm |
| Conveyor System | Belt width: 800mm; Speed: 1.5 m/s; Total length: 120m; Motors: 4 x 30kW |
| Power Requirement | Total installed: 650kW; Voltage: 415V, 3phase, 50Hz; Transformer: 800kVA |
| Material Specifications | Jaw dies: Mn 14%, Cr 2%; Cone liners: Mn 18%, Cr 3%; Screen panels: Polyurethane 60 Shore A |
| Physical Dimensions | Plant footprint: 45m x 30m; Max height: 12m (feed hopper); Weight (total): 180 tonnes |
| Environmental Range | Operating temp: 15°C to 45°C; Humidity: up to 95%; Altitude: up to 200m |

6. Application Scenarios

Case Study 1: Greenfield Site – Ikorodu Granite Quarry

Challenge: New site with 15hectare deposit of highsilica granite (210 MPa). Client needed 200,000 tonnes of 19mm chippings for LagosIbadan expressway expansion within 8 months. Budget constraint of ₦450 million for crushing plant.
Solution: Deployed this specification with 250tph capacity, using 12% Mn jaw dies and polyurethane screens. Installed VFD on conveyors to manage power from 500kVA generator.
Results: Achieved 220,000 tonnes in 7.5 months. Wear cost at ₦34 per tonne, 24% below budget. Screen blinding reduced to 5% during October rains. Client reported 92% uptime.

Case Study 2: Brownfield Upgrade – Ewekoro Quarry

Challenge: Existing 150tph plant with 18yearold jaw crusher producing 22% fines, causing customer complaints from asphalt plant buyers. Downtime at 25% due to worn bearings.
Solution: Replaced primary with this jaw crusher specification and added hydroset cone. Retrofitted automatic lubrication and remote monitoring.
Results: Fines reduced to 13%. Uptime improved to 88%. Bearing failure incidents dropped from 4 per year to 0. Payback period on ₦280 million investment: 14 months.

Case Study 3: HighMoisture Operation – Badagry Quarry

Challenge: Site located 2km from lagoon, with feed material moisture content reaching 8% during wet season. Existing wire mesh screens blinded completely, reducing throughput to 80tph.
Solution: Installed tripledeck screen with polyurethane panels and integrated dust suppression system. Added 2mm nozzle array at feed point.
Results: Maintained 230tph during peak wet season. Screen blinding reduced from 100% to 8%. Client avoided ₦3.2 million in lost production per month.

7. Commercial Considerations

Equipment Pricing Tiers (exworks Lagos, excluding VAT):

• Standard Package (₦380 million): Jaw crusher, cone crusher, feeder, screen, conveyors, basic electrical panel. No VFD, no remote monitoring.
• Enhanced Package (₦445 million): Standard plus VFD on conveyors, automatic lubrication, polyurethane screens, dust suppression system.
• Premium Package (₦510 million): Enhanced plus remote monitoring package, spare jaw dies (1 set), spare cone liners (1 set), 2year warranty on crusher bearings.

Optional Features:

• Additional radial stacker: ₦8.5 million each
• Water spray dust system upgrade (fog nozzles): ₦3.2 million
• 800kVA transformer and switchgear: ₦18 million
• Site installation and commissioning: ₦2535 million (depending on site access)

Service Packages:

• Basic (₦2.5 million/year): Quarterly inspection, wear measurement, remote monitoring access
• Premium (₦6.5 million/year): Monthly inspection, 48hour emergency response, all labour for wear part replacement
• Full Turnkey (₦12 million/year): All consumables (screens, belts, oil), 24hour response, guaranteed 90% uptime

Financing Options:

• 30% down payment, balance over 24 months at 18% interest (through partner bank)
• Leasetoown: ₦18 million/month for 36 months, includes Premium service package
• Equipment buyback guarantee: 40% of purchase price after 5 years, subject to condition

8. FAQ

Q: Can this specification handle Lagos laterite mixed with granite?
A: Yes, up to 15% laterite content by weight. Above this, the grizzly feeder may clog. We recommend a separate washing screen for laterite removal above 15% content.

Q: What is the lead time for delivery to a Lagos quarry site?
A: Standard package: 1214 weeks from order. Enhanced and Premium: 1618 weeks. Installation takes 46 weeks depending on civil works.

Q: How does this specification comply with Lagos State environmental regulations?
A: The dust suppression system meets PM10 limits of 150 µg/m³. Noise levels at 1m from crusher are 85 dB(A), within the 90 dB(A) limit for industrial zones. A noise enclosure is optional for sites within 500m of residential areas.

Q: What is the expected lifespan of the crusher components?
A: Jaw dies: 180230 hours (depending on feed size). Cone liners: 350450 hours. Screen panels: 1,2001,500 hours. Bearings: 8,00010,000 hours with automatic lubrication.

Q: Can this plant be relocated to another Lagos quarry site?
A: Yes. The modular design allows disassembly into 12 transportable units (max 15 tonnes each). Relocation cost is typically ₦1218 million, including recommissioning.

Q: What power generation is required if grid supply is unavailable?
A: A 800kVA generator (typically a Caterpillar C18 or equivalent) is recommended. Fuel consumption at full load: 180 litres/hour. The VFD on conveyors reduces peak load by 60%, allowing a 650kVA generator in Enhanced/Premium packages.

Q: What training do you provide for plant operators?
A: Threeday onsite training included: day 1 on crusher operation and settings, day 2 on screen maintenance and wear monitoring, day 3 on safety and emergency procedures. Additional training for remote monitoring system: ₦250,000 per session.