2 Construction and Maintenance of Belt Conveyors for Coal and Bulk Material Handling Plants www.practicalmaintenance.net Content Chapter Title Page No. 1 Need for Bulk Material Handling Plants with Conveyors 3 2 Characteristics of Bulk Materials 4 3 Mechanical Components in a Belt Conveyor 11 4 Belts 15 5 Belt Standards 43
Belt conveyors are used for carrying coal, ores and minerals in power plants, mining industries, and metallurgical process plants. Capacity of a belt conveyor system may range from 500 to 5000 m 3 /hr and more. The distance covered for a belt conveyor system may be as small as 50 m to 5km for supplying material from mine area.
The movement of coal from face to gate usually includes a scraper chain loader with a fixed flexibility to the face and gate conveyors to ensure centralised transfer. Water, used to reduce dust to a minimum, tends to cause some of the coal fines to adhere to the return belt which can only be removed by the use of polyurethane, mild and hardened .
Conveyor belts for use in the underground coal mines of the U.S. must be flame resistant. The test for flame resistance is the SSFT as mentioned in preceding sections. Generally, conveyor belts are made from a rubber or plastic compound combined with one or more layers of fabric material or different diameters of steel cables.
In 1892, Thomas Robins began a series of inventions which led to the development of a conveyor belt used for carrying coal, ores and other products. In 1901, Sandvik invented and started the production of steel conveyor belts, and in 1905, Richard Sutcliffe invented the first conveyor belts for use in coal mines which revolutionized the mining .
Conveyors running underground or transporting material from mines and quarries are posing greater demands on the conveyor belt than a line in a factory transporting empty boxes. Understand your needs when it comes to durability and ruggedness. Failure to consider this could result in productivity loss and increased downtime. Corrosion-resistance