500 Tons Limestone Crushing Production Line in Nigeria

Client Overview

A leading construction materials supplier in Nigeria sought to establish a high-capacity limestone crushing and sand production plant to meet booming infrastructure demands. The project aimed to produce 500 tons per hour of high-quality aggregates and manufactured sand for road construction and concrete production.

Project Overview

• Location: Nigeria
• Material: Limestone (compressive strength: 120–150MPa)
• Feed Size: ≤750mm
• Output Requirements:
  • 0–5mm (sand) – 30%
  • 5–20mm – 40%
  • 20–31.5mm – 30%
• Capacity: 500TPH
• Project Duration: 6 months (from design to commissioning)

Challenges

1. High Abrasiveness: Limestone wear demands durable equipment.
2. Strict Gradation: Needed precise control over aggregate/sand ratios.
3. Dust Control: Compliance with Nigeria’s environmental regulations.
4. Energy Efficiency: Client prioritized low-operating-cost solutions.

Solution: Customized Crushing Line by Liming Heavy Industry

1. Primary Crushing – C6X Jaw Crusher

• Model: C6X160
• Role: Coarse crushing of ≤750mm limestone lumps.
• Advantages:
  • Integral cast steel structure for high fatigue resistance.
  • 15–20% lower energy consumption vs. conventional crushers.
  • Adjustable hydraulic wedge system for quick discharge setting changes.

2. Secondary Crushing – HPT Hydraulic Cone Crusher

• Model: HPT300
• Role: Medium/fine crushing to produce 20–31.5mm aggregates.
• Advantages:
  • Multi-cylinder design ensures stable output gradation.
  • Laminated crushing principle reduces wear costs by 30%.
  • PLC automation adjusts crushing parameters dynamically.

3. Tertiary Shaping & Sand Making – VSI6X Sand Maker

• Model: VSI6X1263
• Role: Producing 0–5mm high-quality sand with cubical shape.
• Advantages:
  • Four-port impeller design boosts throughput by 20%.
  • Patented “rock-on-rock” crushing minimizes metal contamination.
  • Modular wear parts extend maintenance cycles to 400+ hours.

4. Auxiliary Equipment

• Vibrating Feeder: ZSW490×130 (pre-screening to remove fines)
• Circular Vibrating Screen: 3YK3072 (3-deck classification)
• Dust Collector: Pulse-jet baghouse system (dust emission <20mg/m³)

Technical Highlights

Smart Control System: Centralized PLC monitors production data in real time.
Low Wear Costs: High-chrome blow bars & mantles extend service life.
Turnkey Delivery: Liming provided foundation design, installation supervision, and operator training.

Project Results

Output Achieved: Stable 510TPH (exceeding target by 2%).
Product Quality:

• Sand fineness modulus: 2.6–2.8 (ideal for concrete).
• Aggregate flakiness index: <10%.
  Environmental Compliance: Fully enclosed design with noise <75dB.
  ROI: Client recovered investment within 14 months.

Client Feedback

“Liming’s team delivered exceptional expertise—from equipment selection to on-site training. The VSI6X sand maker’s low maintenance and high yield transformed our profitability. We’re planning a second 800TPH line with Liming.”
— Project Manager, Nigerian Client