Product Overview: Designed for High-Temperature, Heavy-Duty Applications
In underground coal mines, metal mines, and flammable and explosive environments, the flame-retardant properties of conveyor belts are directly linked to the safety of miners and mine operations. Flame-retardant steel-cord conveyor belts are specialized products designed specifically to address these extreme safety challenges - they seamlessly combine the high strength and long-distance conveying capabilities of steel-cord conveyor belts with rigorous flame-retardant and anti-static properties, providing reliable safety assurance for underground and high-risk environments.
Key Technical Specifications
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Parameters |
Value/Range |
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Tensile strength |
ST 800～ST10000 N/mm |
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Belt Width |
W 500～3200 mm |
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Standard |
GB/T 21352-2022, MT 668 / MT 914, ISO 340 / EN 12882 |
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Steel cord Structure |
7×7 / 7×19 Hot-dip galvanized, open-type |
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Elongation |
0.22% - 0.28%, <0.3% |
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Available types of rubber cover |
flame retardant, Heat resistant, wear resistant, etc. |
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In environments where there is a risk of gas or coal dust explosions, static sparks pose a significant hazard. Flame-retardant steel-cord conveyor belts must be electrically conductive. |
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Major Technical Advantages and Application
1. Underground Coal Mine Transportation (Core Application)
Application Scenarios
Underground coal mining face haulage drifts, central haulage drifts, main inclines, blind inclines, etc.
Mandatory Regulations
Underground belt conveyors must use flame-retardant conveyor belts in coal mining industry. This is a mandatory safety requirement with no exceptions.
Environmental Characteristics
● Presence of methane gas, posing an explosion risk
● Coal dust poses an explosion hazard
● Coal seams have a tendency toward spontaneous combustion
● High ambient humidity (up to 97%) and significant temperature fluctuations
Product Benefits
● Effectively prevents fires caused by friction on the conveyor belt or external ignition sources.
● In the event of a fire, the flames will not spread along the conveyor belt, buying valuable time for underground personnel to evacuate and extinguish the fire.
● Anti-static properties eliminate the risk of methane ignition from static sparks.
2. Metal and Non-Metal Underground Mines
Application Scenarios: Underground transportation systems in copper, iron, and gold mines, etc.
Environmental Characteristics:
● Although there is no methane gas, there is a risk of dust explosions.
● Underground space is limited, making fire evacuation difficult.
● Sparks may be generated during ore transportation.
Product Value: Provides fire protection for underground transportation systems in metal mines that meets the same standards as those for coal mines, complying with increasingly stringent safety regulations.
3. High-Fire-Risk Areas on the Ground
Application Scenarios:
● Coal-fired power plant coal handling systems: Coal dust environments with high fire risk.
● Port coal/ore transshipment terminals: Concentrated fire risk within enclosed gantries.
● Raw material conveyance in chemical plants: Presence of flammable and explosive materials.
● Coal powder preparation workshops in metallurgical enterprises: Areas at risk of coal dust explosions.
Product Benefits: Meets EN 12882 Category 1 anti-static requirements; suitable for ATEX-certified explosive atmospheres.
4. Optional Flame-Retardant Function for Enhanced Safety
For high-temperature applications with fire risks, flame-retardant features can be configured:
Class K Flame Retardancy: Complies with ISO 340 standards; self-extinguishing after the flame is removed.
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Application Scenarios |
Special Challenges |
Technical Advantages |
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High-Methane Mines - The Choice for the Highest Explosion-Proof Rating |
High-methane mines impose extremely stringent explosion-proof requirements on electrical and conveying equipment. |
Verified through the most rigorous propane combustion tests in mine tunnels. Surface resistance strictly controlled below 3.0×10⁸ Ω to prevent static electricity buildup. Optional interfaces for integration with smoke detection and automatic sprinkler systems. |
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Conveying in Steeply Inclined Tunnels - Dual Protection: High Strength + Flame Retardancy |
During downhill transport at steep angles, the conveyor belt is subjected to greater tension, resulting in a higher risk of fire. |
Provides ultra-high tensile strength, Low elongation and Excellent adhesion. |
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Heat-Resistant + Flame-Retardant Composite - High-Temperature, High-Risk Environments |
Certain underground or surface high-temperature environments (such as geothermal anomaly zones in coal mines or high summer temperatures in power plant coal handling systems) require materials that meet both heat resistance and flame-retardant requirements. |
Maintains flame-retardant properties while withstanding material temperatures exceeding 120°C. Suitable for special operating conditions where high-temperature materials and flammable environments coexist. |
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With years of experience in product design and on-site service, we can assist you in selecting and customizing products to meet your specific application needs, ensuring that the products you purchase operate more reliably and have a longer service life. |
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