![]() ![]() These crushers are always operated in choke feed conditions. The Gyradisc crushers have head diameters from around 900-2100 mm. The reduction ratio is around 8:1 and as the product size is relatively small the feed size is limited to less than 50 mm with a nip angle between 25° and 30°. The operation is similar to the standard cone crushers except that the size reduction is caused more by attrition than by impact. less than 6 mm, special cone crushers known as Gyradisc crushers are available. The final product sizes are fine, medium or coarse depending on the closed set spacing, the configuration of the crushing chamber and classifier performance, which is always installed in parallel.įor finer product sizes, i.e. These crushers are invariably operated in closed circuit. The Short Head cone crushers are designed for tertiary or quaternary crushing where finer product is required. The Standard cone crushers are for normal use. * Chamber sizes vary between 3-6 numbers within a particular designated crusher size to produce fine, medium or coarse sized product. To prevent damage to the crushing surfaces, the concave or shell of the crushers are held in place by strong springs or hydraulics which yield to permit uncrushable tramp material to pass through. The flatter cone angles helps to retain the particles longer between the crushing surfaces and therefore produce much finer particles. These crushers are designed so that the head to depth ratio is larger than the standard gyratory crusher and the cone angles are much flatter and the slope of the mantle and the concaves are parallel to each other. The breaking head gyrates inside an inverted truncated cone. 5.3 is a schematic diagram of a cone crusher. ![]() As the mechanism of crushing in these crushers are similar to gyratory crushers their designs are similar, but in this case the spindle is supported at the bottom of the gyrating cone instead of being suspended as in larger gyratory crushers. Cone crushers were originally designed and developed by Symons around 1920 and therefore are often described as Symons cone crushers.
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