Gyratory and Cone Crusher
Gyratory crushers were invented by Charles Brown in 1877 and developed by Gates around 1881 and was referred to as a Gates Crusher . The smaller form is described as a cone crusher. The larger crushers are normally known as primary crushers as they are designed to receive run-on-mine (ROM) rocks directly from the mines. The gyratory crushers crush to reduce the size by a maximum of about one-tenth its size. Usually metallurgical operations require greater size reduction, hence the products from the primary crushers are conveyed to secondary or cone crushers where further reduction in size takes place. Here the maximum reduction ratio is about 8:1. In some cases installation of a tertiary crusher is required where the maximum reduction is about 10:1. The secondary crushers are also designed on the principle of gyratory crushing but the construction details vary. Similar to jaw crushers, the mechanism of size reduction in gyratory crushers is primarily by the compressive action of...