Purpose
🏗️ Mainly used in industries such as metallurgy and construction to transport high-temperature materials such as sintered ore, coke, and cement clinker. The material temperature should not exceed 800 °C, and the surface temperature should not exceed 220 °C.
Features: The cover layer is made of EPDM rubber, and the skeleton material is made of domestically used high-temperature resistant canvas. The unique formula design solves the key problems of high saturation, poor adhesion, and low interlayer adhesion of EPDM rubber. It has the characteristics of light weight, long lifespan (about 2–4 times), and good heat resistance.
Implementing the standard of "General purpose fabric core conveyor belts with rubber or plastic covering", this standard adopts the international standard draft ISO/FDIS14890-1999.
A heat-resistant conveyor belt is made of multiple layers of rubber cotton canvas (polyester cotton cloth) or polyester canvas covered with high-temperature resistant or heat-resistant rubber, bonded together by high-temperature vulcanization, suitable for transporting hot coke, cement, slag, and hot castings below 175 °C.
✅ The specifications are the same as ordinary conveyor belts. | ✅ The product complies with HG2297-92 standard.
Heat resistant conveyor belts can be divided into four types:
T1 — Type I
Test temperature: ≤ 100 °C
Max short-term operating temp: 150 °C
T2 — Type II
Test temperature: ≤ 125 °C
Max short-term operating temp: 170 °C
T3 — Type III
Test temperature: ≤ 150 °C
Max short-term operating temp: 200 °C
T4 — Type IV
Test temperature: ≤ 175 °C
Max short-term operating temp: 250 °C
Physical Properties
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Strength Aging Difference (IRHD): 23
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Maximum value after aging (IRHD): 88
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Decreased rate of change in tensile strength: 40%
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Lowest value after aging: 5 MPa
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Change rate of tensile strength: 60%
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Minimum value after aging: 150%
High temperature resistant steel mesh conveyor belt is made of steel wires woven vertically and horizontally. The surface of the steel mesh is galvanized or copper plated, and the lower surface is covered with a rubber layer. During transportation of high-temperature materials, the overall surface does not peel off, and its performance is more reliable than layered heat-resistant conveyor belts.
A heat-resistant conveyor belt is made of multiple layers of rubber cotton canvas (polyester cotton cloth) covered with high-temperature resistant or heat-resistant rubber, bonded together by high-temperature vulcanization, suitable for transporting hot coke, cement, slag, and hot castings below 240 °C.
✅ Specifications same as ordinary conveyor belts. | ✅ Complies with HG2297-92 and GB/T20021-2005 standards.
Heat resistant conveyor belts can be divided into five types:
T1 — Type I
Test temperature: ≤ 100 °C
Max short-term operating temp: 150 °C
T2 — Type II
Test temperature: ≤ 125 °C
Max short-term operating temp: 170 °C
T3 — Type III
Test temperature: ≤ 150 °C
Max short-term operating temp: 200 °C
T4 — Type IV
Test temperature: ≤ 175 °C
Max short-term operating temp: 400 °C
T5 — Type V
Test temperature: ≤ 240 °C
Max short-term operating temp: 600 °C
Key Features
This type of conveyor belt is mainly used in industries such as metallurgy, building materials, casting, coking, and chemical engineering to transport high-temperature solid materials such as sintered ore, coke, cement, and fertilizers with specified heat resistance performance.
- The heat resistance and service life mainly depend on the heat resistance of the covering layer and belt core.
- Rubber with good heat resistance such as styrene butadiene rubber, butyl rubber, ethylene propylene rubber are used as the main rubber material.
- Polyester cotton and polyester canvas with heat resistance and low heat shrinkage are used as the core.
- Divided into four levels (T1–T4) according to different test temperatures.
- Strength and width specifications are the same as ordinary conveyor belts.
- Complies with national standard GB/T 20021-2005 "Canvas Heat-resistant Conveyor Belt".
📌 Tape Marking Example:
200 1200 EP 5 1000 8+3 T2
This indicates: Length 200 m | Width 1200 mm | Core: EP canvas 5 layers | Strength: 1000 N/mm | Cover layers: 8 mm (top) + 3 mm (bottom) | Cover layer withstands test temp ≤ 125 °C (T2)
In order to meet higher operating temperatures, some manufacturers have developed heat-resistant conveyor belts capable of withstanding higher temperature levels and burning. Generally, flame retardant insulation agents, anti-ablation agents, and thermal conductivity agents are added to the cover layer rubber to improve the high-temperature and anti-ablation properties of the tape.
Frequently Asked Questions (FAQ)
Q
What is the maximum material temperature a heat-resistant conveyor belt can handle?
Heat-resistant conveyor belts are designed to handle material temperatures up to 800 °C, while the surface temperature should not exceed 220 °C. For higher operating demands, Type V (T5) belts can withstand a short-term operating temperature of up to 600 °C.
Q
What industries are heat-resistant conveyor belts mainly used in?
These belts are widely used in metallurgy, building materials, casting, coking, and chemical engineering industries for transporting high-temperature solid materials such as sintered ore, coke, cement, slag, fertilizers, and hot castings.
Q
What are the different temperature grade types for heat-resistant conveyor belts?
Heat-resistant conveyor belts are classified into up to five grades: T1 (≤100 °C test / 150 °C max), T2 (≤125 °C / 170 °C max), T3 (≤150 °C / 200 °C max), T4 (≤175 °C / 400 °C max), and T5 (≤240 °C / 600 °C max). Selection depends on the specific operating temperature of the application.
Q
What materials are used in the cover layer and belt core of heat-resistant conveyor belts?
The cover layer is typically made of heat-resistant rubber such as EPDM, styrene butadiene rubber, butyl rubber, or ethylene propylene rubber. The belt core uses polyester cotton or polyester canvas with high heat resistance and low heat shrinkage to ensure structural stability at elevated temperatures.
Q
What quality standards do heat-resistant conveyor belts comply with?
Heat-resistant conveyor belts comply with multiple standards including HG2297-92, GB/T20021-2005 ("Canvas Heat-resistant Conveyor Belt"), and the international standard draft ISO/FDIS14890-1999 for general purpose fabric core conveyor belts.
Q
What are the advantages of EPDM rubber cover layer heat-resistant conveyor belts?
EPDM cover layer belts offer a unique formula that solves key challenges including high saturation, poor adhesion, and low interlayer adhesion. Key advantages include light weight, extended lifespan (approximately 2–4 times longer than standard belts), excellent heat resistance, and reliable performance for demanding high-temperature conveying applications.
Boao Rubber
