Mining Fabric Conveyor Belt

EP laminated belts feature high modulus and low elongation; their elongation rate under rated tension is far superior to that of ordinary conveyor belts. This characteristic directly addresses the trend toward "long-distance conveying" in the mining industry. The solution of installing a single long-distance belt conveyor in each tunnel, replacing the traditional segmented transportation method and effectively resolving issues such as low transportation efficiency, excessive staffing, and high maintenance costs. As customers reply they achieved smooth and efficient operation of long-distance belt transportation.

Under conditions of intense impact from large, sharp materials such as copper ore, the multi-layer canvas structure of the layered belt effectively cushions material impacts, preventing the cover rubber from tearing. For high-wear applications, the perfect combination of an innovatively developed cover rubber and high-strength carcass materials creates a multi-layered protection system capable of effectively resisting cutting and impact damage caused by falling materials. In practical applications at Australian iron ore terminals, conveyor belts specifically designed for fine-grained abrasive materials have demonstrated exceptional wear resistance, extending service life by over 30% and significantly reducing equipment maintenance costs.

Layered belts offer superior troughing performance compared to steel-cord conveyor belts, making them particularly suitable for complex underground conditions with uneven tunnel gradients and multiple turns. In Kaiyuan Company's 9715 intake tunnel, where uneven gradients and frequent belt drift were issues, the installation of a belt-pressing device enhanced lateral restraint and longitudinal positioning capabilities, successfully resolving the drift and misalignment problems.

Laminated conveyor belts can be classified by cover rubber properties into standard, heat-resistant, flame-retardant, cold-resistant, acid/alkali-resistant, and oil-resistant types, with belt widths ranging from B200 to B2000. They can be custom-designed to meet specific requirements based on conveying capacity, transport distance, material characteristics, and operating environments.

Based on transport capacity, common width models include B650, B800, B1000, B1200, B1600, B1800, B2000 and even wider than B3000. Belt width selection must be coordinated with the specifications of supporting equipment such as drums and idlers to ensure precise matching between the conveyor belt width and the equipment, thereby preventing misalignment and slippage during operation.

EP/NN conveyor belts typically have 1 to 10 fabric plies. A higher number of plies results in greater tensile strength, but also increases the belt's weight and cost; therefore, selection should be based on load requirements.

Select the appropriate cover rubber standard based on the operating environment. We can provide various fabric core conveyor belts with various strength and covering glue requirements according to DIN22102, GB7984, AS1332 and other standards.

The splicing process does not simply connect the fabric layers of the belt; instead, the conveyor belt is peeled into layers, thoroughly abraded, coated with rubber adhesive, and covered with a thin rubber sheet (0.8–1 mm thick). The two peeled layers are then aligned, smoothed, and covered with an electric heating plate for vulcanization.

The vulcanization temperature should be controlled at 145°C ± 5°C, with a holding time equal to the belt thickness multiplied by 1.2 plus 22 minutes.

Once the temperature drops below 70°C, remove the belt from the vulcanizing machine, inspect the joint, and trim any excess edges.

Inspect the joint area for abnormalities such as bubbles or missing adhesive. Check the centerline deviation; if the deviation exceeds 25 mm over a 10-meter length or if the joint exhibits significant bubbling, the joint must be re-bonded.

Prevent quality issues such as flapping or blistering caused by incorrect adhesive application, contaminated adhesive surfaces, or trapped air during bonding.