🏭 Purpose
It is 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 ℃, and the surface temperature should not exceed 220 ℃.
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 ℃.
- 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 not exceeding 100 ℃, max short-term operating temperature: 150 ℃
T2 — Type II
Test temperature not exceeding 125 ℃, max short-term operating temperature: 170 ℃
T3 — Type III
Test temperature not exceeding 150 ℃, max short-term operating temperature: 200 ℃
T4 — Type IV
Test temperature not exceeding 175 ℃, max short-term operating temperature: 250 ℃
📊 Physical Properties
Difference between Strength Aging and Pre Aging (IRHD): 23
Maximum value after aging (IRHD): 88
Decreased rate of change in tensile strength: 40%
Lowest value after aging: 5 MPa
Change rate of tensile strength performance: 60%
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 of the steel mesh is covered with a rubber layer. During the 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 ℃.
- The specifications are the same as ordinary conveyor belts.
- The product complies with HG2297-92 and GB/T20021-2005 standards.
- Heat resistant conveyor belts can be divided into five types:
T1 — Type I
Test temperature not exceeding 100 ℃, max short-term operating temperature: 150 ℃
T2 — Type II
Test temperature not exceeding 125 ℃, max short-term operating temperature: 170 ℃
T3 — Type III
Test temperature not exceeding 150 ℃, max short-term operating temperature: 200 ℃
T4 — Type IV
Test temperature not exceeding 175 ℃, max short-term operating temperature: 400 ℃
T5 — Type V
Test temperature not exceeding 240 ℃, max short-term operating temperature: 600 ℃
⚙️ 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 of heat-resistant conveyor belts mainly depend on the heat resistance of the covering layer and the belt core. Generally, rubber with good heat resistance such as styrene butadiene rubber, butyl rubber, ethylene propylene rubber, etc. are used as the main rubber material, and polyester cotton and polyester canvas with heat resistance and heat shrinkage resistance are used as the core.
Heat resistant conveyor belts are divided into four levels according to different test temperatures:
T1
Test temperature ≤ 100 ℃
T2
Test temperature ≤ 125 ℃
T3
Test temperature ≤ 150 ℃
T4
Test temperature ≤ 175 ℃
The strength and width specifications of heat-resistant conveyor belts are the same as those of ordinary conveyor belts. Example of tape marking:
200 | 1200 | EP | 5 | 1000 | 8+3 | T2
↳ Length: 200m · Width: 1200mm · Core: EP canvas (5 layers)
↳ Strength: 1000 N/mm · Cover layers: 8mm (top) + 3mm (bottom)
↳ Max test temperature: 125 ℃ — complies with GB/T 20021-2005
In order to meet higher operating temperatures, some manufacturers have also developed heat-resistant conveyor belts that can withstand higher temperature levels and high-temperature conveyor belts that can withstand burning. Generally, flame retardant insulation agents, anti-ablation agents, thermal conductivity agents, etc. are added to the cover layer rubber to improve the high-temperature and anti-ablation properties of the tape.
❓ Frequently Asked Questions
Q What is the maximum material temperature a heat-resistant conveyor belt can handle?
Heat-resistant conveyor belts are engineered to handle materials at temperatures up to 800 ℃, while the belt surface temperature should not exceed 220 ℃. For extreme applications, specialized steel mesh conveyor belts with a T5 rating can handle short-term operating temperatures up to 600 ℃.
Q What are the different temperature rating types for heat-resistant conveyor belts?
There are up to five types: T1 (≤100 ℃ test / 150 ℃ max), T2 (≤125 ℃ / 170 ℃ max), T3 (≤150 ℃ / 200 ℃ max), T4 (≤175 ℃ / up to 400 ℃ max), and T5 (≤240 ℃ / 600 ℃ max). Selection depends on the specific application and material temperature.
Q What industries commonly use heat-resistant conveyor belts?
They are widely used in metallurgy, building materials, construction, casting, coking, and chemical engineering industries. Typical materials transported include sintered ore, coke, cement clinker, slag, fertilizers, and hot castings.
Q What materials are used in the construction of heat-resistant conveyor belts?
The cover layer is typically made from EPDM rubber, styrene butadiene rubber, butyl rubber, or ethylene propylene rubber. The belt core uses polyester cotton canvas or polyester canvas. For the highest temperature ranges, steel mesh belts with galvanized or copper-plated wire are used, often with a rubber layer on the underside.
Q What 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 ISO/FDIS14890-1999 for general-purpose fabric core conveyor belts.
Q What are the advantages of EPDM rubber cover heat-resistant conveyor belts over standard belts?
EPDM rubber cover belts offer significant advantages including lighter weight, a lifespan approximately 2 to 4 times longer than standard belts, and excellent heat resistance. The unique formula addresses common issues like high saturation, poor adhesion, and low interlayer bonding strength, resulting in a more durable and reliable belt for high-temperature environments.
Boao Rubber
