Coal mine ventilation fans are used for main mine exhaust, local face ventilation, auxiliary ventilation, and long-distance roadway air supply in underground mining operations. Fan configuration is selected according to required airflow, static pressure, system resistance, motor power, and mine safety requirements.
Technical Specifications
|
Fan Series |
Impeller Diameter (mm) |
Airflow (m³/s) |
Static Pressure (Pa) |
Motor Power (kW) |
Speed (RPM) |
Drive Configuration |
Voltage |
|
FB |
400–1,000 |
1.5–25.0 |
200–1,500 |
1.5–37 |
2,900 |
Direct Drive / Single Stage |
380/660/1140V, 50Hz |
|
FBD |
500–1,400 |
3.0–60.0 |
800–4,500 |
2 × 3–2 × 110 |
740–2,900 |
Counter-Rotating Dual Motor |
380/660/1140V, 50Hz |
|
FBCD |
600–1,400 |
4.0–55.0 |
600–4,000 |
2 × 5.5–2 × 90 |
740–1,480 |
Counter-Rotating Extractive |
380/660/1140V, 50Hz |
|
FBCZ |
1,200–2,800 |
15.0–180.0 |
500–3,200 |
18.5–315 |
740–980 |
Single-Stage Main Extractive |
380/660/1000V / 6kV |
|
FBCDZ |
1,400–3,200 |
25.0–350.0 |
800–6,000 |
2 × 37–2 × 500 |
740–980 |
Counter-Rotating Main Station |
660/1140V / 6kV / 10kV |
Coal Mine Application
Main Mine Extractive Ventilation: FBCZ and FBCDZ fans are used for main mine exhaust ventilation and can be configured for required airflow, pressure, and air-reversal conditions.
Press-In Local Face Ventilation: FB and FBD fans supply fresh air through flexible ducting to active headings and excavation areas.
Extractive Dust & Gas Removal: FBCD fans are used for extractive ventilation where contaminated air must be directed toward return airways.
Long-Distance Roadway Air Supply: Counter-rotating FBD fans provide higher pressure for long-distance duct runs and high-resistance heading ventilation.
Auxiliary Chamber Circulation: FB fans can provide auxiliary ventilation for underground pump stations, substations, winch chambers, and other enclosed areas.
Fan Performance Curves & Duty Point
Aerodynamic Verification: Performance curves can document airflow, static pressure, total pressure, shaft power, and efficiency at defined test conditions. Testing is conducted according to applicable ISO 5801 or GB/T 1236 requirements. Test reports can be provided with the relevant fan configuration.
Adjustable Blade Pitch: For applicable models, adjustable blade pitch allows the operating point to be matched to changes in system resistance.
System Curve Matching: The selected fan is checked against the site-specific system resistance curve to determine the required operating point, pressure margin, and motor power.
Mechanical Construction
Impeller Materials: Impellers can be configured with cast aluminum alloy or Q235B/Q355B steel according to the selected fan model and operating conditions.
Casing: Welded rolled-steel construction with reinforced flanges is available for applicable high-pressure configurations.
Corrosion Protection: Steel surfaces can be protected with anti-corrosion primer and epoxy coating for humid operating environments.
Direct Drive: Direct coupling eliminates belt and pulley components and simplifies drive-system maintenance.
OEM Support
Project Technical Inputs: Fan selection requires airflow, static pressure, air density, elevation, duct diameter and length, voltage, frequency, and applicable safety requirements.
Electrical Specifications: Motor voltage and frequency are configured according to the selected fan model and project power system. Options may include 440 V, 575 V, 1,140 V, 3.3 kV, or 6 kV at 50/60 Hz where applicable.
Explosion Protection & Safety Compliance
Explosion-Proof Motors: Flameproof three-phase induction motors can be configured for applicable underground coal mine environments. Motor certification is provided according to the specified electrical and regulatory requirements.
Spark-Resistant Construction: Copper or brass lining rings around the impeller zone are available for spark-resistant configurations.
Manufacturing Quality Standards: Manufacturing facilities operate under ISO 9001, ISO 14001, and ISO 45001 management systems.
Compliance Documentation: Available documentation includes factory balancing reports, motor explosion-proof certificates, and raw-material Mill Test Certificates.
FAQ
Q: What are the differences between counter-rotating FBD/FBCDZ fans and single-stage fans?
A: Counter-rotating fans provide higher pressure and more stable airflow for high-resistance, long-duct systems but cost more.
Q: Can you provide a consolidated proposal and shipment plan for multi-fan projects?
A: Yes. We can prepare one technical proposal and coordinate combined container loading and shipment.
Q: What is the lead time for standard and customized main ventilation fans?
A: Standard FB/FBD fans typically ship within 25–35 days. Larger FBCZ/FBCDZ fans with custom 6 kV/10 kV voltage or high power generally require 45–60 days.
Q: What warranty applies to the motor and impeller?
A: The sales contract defines warranty coverage, which generally includes manufacturing defects in the motor and mechanical assembly. Claims require photos, operating data, and the serial number for remote diagnosis.
Q: Are critical spare parts available for underground maintenance?
A: Yes. Spark-resistant rings, bearings, and explosion-proof motor components can be ordered with the initial shipment or supplied later.
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