Heat Resistant Conveyor Belts for Cement Plants: What to Check Before You Buy

23 October, 2026 | Admin

Rubber Conveyor Belts Supplier Saudi Arabia - Diode Trading EST

Short answer: A heat resistant conveyor belt for a cement plant is chosen by the temperature of the material, how long the material stays on the belt, and how abrasive and dusty it is. Quote the material temperature, not the room temperature, and ask the supplier which heat resistance class the belt belongs to.

Cement plants are tough on belts. Clinker leaves the kiln and cooler hot, sharp and abrasive. Raw meal and cement are dusty and can be warm. Ordinary belts harden and crack in this environment. A heat resistant belt is built with rubber compounds that keep their flexibility and strength at higher temperatures.

Table of Contents

How heat damages an ordinary belt

Heat speeds up the ageing of rubber. The cover hardens, loses elasticity and then cracks. Cracks let moisture and dust into the carcass, and the belt starts to delaminate. In a plant this shows up as:

surface cracking on the carrying side
hardening that you can feel with a thumbnail
cover separating from the fabric
belts that last far less than their expected life

If you see these signs on a belt that carries warm material, the belt is probably not rated for the temperature.

The temperature that matters

Most buyers quote the temperature of the air around the belt. What matters is the temperature of the material when it lands on the belt and how long it stays in contact. A short contact with very hot material is different from long contact with moderately hot material. Give your supplier:

the peak material temperature
the typical temperature
how the temperature changes during the shift
how long the material is in contact (belt speed and length)

Heat resistance classes

Heat resistant belts are sold in classes, each class covering a higher material temperature. The names and limits depend on the standard the maker follows, so do not assume that two suppliers’ classes are the same. Ask for the standard and the class in writing, and compare belts using that class, not a marketing description.

Fabric and steel cord for hot duty

Both fabric and steel cord belts can be made in heat resistant versions. Steel cord is used where the tension is very high. The carcass needs to survive the temperature as well as the cover, so tell your supplier the whole duty.

Other conditions in a cement plant

Heat is only one of the problems. Check also for:

Abrasion: clinker is hard and sharp, and it wears covers quickly.
Impact: drop heights at transfers can damage the belt.
Dust: dust builds up on idlers and pulleys and causes misalignment.
Oil and grease: where lubricants leak onto the belt, ordinary rubbers swell. If this applies, tell your supplier.
Fire risk: some areas, such as coal feed, may need a fire resistant belt as well. See fire and heat resistant conveyor belts.

Practical tips for longer belt life

Let the clinker cool as much as the process allows before it reaches the belt.
Reduce the drop at transfer points.
Keep scrapers set properly and clean off buildup quickly.
Check belt tracking regularly. A belt that rubs its structure will wear its edge.
Inspect the cover for cracking during planned shutdowns and record what you see.

What to send your supplier

Peak and average material temperature
Type of material (clinker, raw meal, cement, coal)
Belt width, length and speed
Capacity in tonnes per hour
Loading height and transfer points
Whether oil, water or fire are also factors

Diode Trading EST supplies industrial conveyor belts across Saudi Arabia, and every order ships with a Material Test Certificate. Contact Diode Trading EST

Frequently Asked Questions

What is a heat resistant conveyor belt?

A conveyor belt with a rubber compound designed to keep its flexibility and strength when carrying hot material.

What temperature can a heat resistant belt take?

It depends on the belt and the standard it follows. Ask your supplier for the class and the maximum material temperature in writing.

Why do belts crack in cement plants?

Heat hardens the rubber over time, and abrasion and impact add to the damage. Cracks let in moisture and dust, which makes the belt age faster.

Is a heat resistant belt also fire resistant?

Not necessarily. They solve different problems. Some sites need both.

What should I tell my supplier?

The peak material temperature, how long the material is in contact, belt size, speed, capacity and any oil or fire risk.

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