Roll Crushers is the use of friction roller surface material to bite into the broken area, so bear squeeze or split and broken machinery. When used in rough broken broken or in need of increased ratio, often made in the roll surface of teeth or grooves to increase the role of splitting. Roll Crushers usually divided into the number of roller single roll, double roll and multi-roller crusher, suitable for rough broken, in pieces or fine coal, limestone, cement clinker and feldspar in the hardware, such as the following materials.