Belt Conveyors - for mining applications. Belt conveyor systems continuously transport all forms of material, including excavated and crushed rock, in an efficient manner due to their effective availability. They cover a wide range of applications, from mining or extraction to in-plant or overland where they convey material over long .. lt Conveyors for Bulk Materials Calculations by CEMA …2014-1-21 · Belt Widths The belt widths are as follows: 18, 24, 30, 36, 42, 48, 54, 60, 72, 84, and 96 inches. The width of the narrower belts may be governed by the size of lumps to be handled. Belts must be wide enough so that any combination of prevailing lumps and finer material does not load the lumps too close to the edge of the conveyor belt.