Heating Resistant Conveyor Belt
Heat Resistant Rubber Conveyor Belt
A multi-layer cotton, polyester-cotton, or polyester canvas carcass covered with heat resistant rubber, high-temperature bonded through vulcanization. Rated for material temperatures up to 800°C and belt surface temperatures up to 220°C — built to carry hot coke, sinter, cement clinker, slag, and hot castings without the cover degrading._1788746918_WNo_800d800.jpg)
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Built to carry the heat, not just resist it once
Standard conveyor belting hardens, cracks, and loses its bond strength when it's repeatedly exposed to hot material. A heat resistant belt is constructed differently from the ground up: multiple plies of cotton, polyester-cotton, or polyester canvas are covered with a rubber compound formulated specifically for high-temperature service, then bonded through a high-temperature vulcanization process rather than a standard cure cycle. That bonding step matters as much as the cover compound — it's what keeps the cover attached to the carcass after repeated heat cycling instead of delaminating. The result is a belt rated for material temperatures up to 800°C and a belt surface temperature up to 220°C, used across metallurgy, cement, and construction-material handling for sinter, coke, cement clinker, slag, and hot castings up to roughly 175°C in continuous contact.- CarcassCotton, polyester-cotton, or polyester canvas
- CoverHigh-temperature / heat resistant rubber
- Bonding methodHigh-temperature vulcanization
- Max material temperature800°C
- Max belt surface temperature220°C
- Typical materials handledSinter, coke, clinker, slag, hot castings
Four heat resistance grades, by continuous test temperature
Grade selection comes down to how hot the belt surface itself runs in continuous service, not just the peak material temperature during loading.S1
Withstands continuous test temperature below 100°C. Entry-level heat duty.
S2
Withstands continuous test temperature below 125°C. Common mid-range foundry and clinker duty.
S3
Withstands continuous test temperature below 150°C. Heavier sinter and coke handling.
S4
Withstands continuous test temperature below 175°C. Our highest continuous-duty grade for the hottest transfer points.
Cover physical properties after heat-ageing test
What matters isn't the belt's properties out of the box, but how little they change after sustained heat exposure. These are the post-ageing figures we test and quote against for each grade.| Property | S1 | S2 | S3 | S4 |
|---|---|---|---|---|
| Hardness change after ageing (IRHD) | 20 | 20 | ±20 | ±20 |
| Max hardness after ageing (IRHD) | 85 | 85 | 85 | 85 |
| Tensile strength variance, max decrease (%) | 25 | 30 | 40 | 40 |
| Tensile strength after ageing, min (MPa) | 12 | 10 | 5 | 5 |
| Elongation at break variance, max decrease (%) | 50 | 50 | 55 | 55 |
| Elongation at break after ageing, max (%) | 200 | 200 | 180 | 180 |
Interlayer adhesion strength
Heat cycling is what causes delamination in an under-specified belt, so ply and cover adhesion is tested and rated separately from the cover compound itself.| Bond location | Average of samples | Lowest single sample |
|---|---|---|
| Between fabric plies | 3.0 | 2.0 |
| Cover to belt core (cover 0.8–1.5mm) | 2.2 | 1.6 |
| Cover to belt core (cover >1.5mm) | 2.6 | 2.0 |
Built for buyers moving hot material by belt, not chute
If your current belt is cracking, hardening, or delaminating at the cover within a year of installation, that's a heat-grade mismatch, not a wear issue.- Steel mill sinter & coke handling
- Foundry hot casting & shakeout transfer
- Cement plant clinker conveying
- Blast furnace slag handling
- Waste incineration & ash transfer
- Glass manufacturing batch handling
- Non-ferrous smelting & refining
- Brick & ceramics kiln discharge
- Power plant hot ash conveying
- Metallurgy & construction material processing
Common questions
What's the difference between material temperature and belt surface temperature?
Material temperature (up to 800°C) is the hot load itself, usually in brief contact; belt surface temperature (up to 220°C) is what the belt cover itself reaches in continuous operation. Grade selection (S1–S4) is based on the sustained belt surface condition, not the peak material temperature.
Which grade do I need for coke or sinter handling?
Most coke and sinter transfer points run hot enough to justify S3 or S4, but the right grade depends on your actual belt surface temperature in continuous operation — send us that figure and we'll confirm.
Why does interlayer adhesion matter as much as cover heat resistance?
Repeated heat cycling is what causes plies to delaminate from each other or from the cover, even when the cover compound itself is still intact. We test and rate ply and cover adhesion separately for this reason.
Can this belt run continuously at 800°C?
No — 800°C is the rated material temperature for material in transit, not a continuous belt surface condition. Continuous belt surface temperature is capped at 220°C, with S1–S4 grading the belt's tolerance within that range.
What information do you need to quote a heat resistant belt?
Material type and peak temperature, continuous belt surface temperature if known, belt width, carcass ply preference, and conveyor length.
