·A robust and reliable design low machine height and an excellent ratio of capacity versus machine mass make double roll crushers DRC still today the preferred choice for many soft to medium hard rock applications in quarries and ore mines As a result the forces acting in a double roll crusher could be much higher at least locally as
·Roll crushers have a theoretical MAXIMUM reduction ratio of 4 1 If a 2 inch particle is fed to the roll crusher the absolute smallest size is 1/2 inch Roll crushers will only crush material down to a minimum particle size of about 10 Mesh 2 mm A roll crusher crushes using compression with two rolls rotating about a shaft towards the gap
·A reduction of 3 to 1 is the average and often it should not exceed 2 to 1; so that in actual practice it would require a 30 in roll working in connection with the 8 ft roll to produce the 1 in crusher delivery size; the first roll reducing from 10 to 3 and the latter from 3 to 1
Depending on the duty class they can be used in most ROM applications such as coal salt lime pet coke and potash operations Triple Roll Crushers combine a Single Roll Crusher with a Double Roll Crusher to form a crusher that is capable of achieving a 6 1 reduction ratio in the primary stage and a 4 1 reduction in the secondary stage while producing a cubical product at
·Figure 1 Double roll crusher geometry Thickness of the RollFigure 1 is the geometry of a double roll crusher with a spherical particle about to enter the crushing zone of a roll crusher and is about to be nipped [4] [5] For rolls that have equal radii and length tangents drawn at the point of contact of the particle
·smooth Roll Crushers Adam Zanker Smooth roll crushers are widely used as secondary crushers operating most effectively when set for size re ductions in a ratio between 3 or 4 to I The feed supplied to these units var ies from 13 to 102 mm in size and the product obtained ranges from 13 mm to about 20 mesh Smooth roll crushers produce very
·Figure 1 Double roll crusher geometry Thickness of the RollFigure 1 is the geometry of a double roll crusher with a spherical particle about to enter the crushing zone of a roll crusher and is about to be nipped [4] [5] For rolls that have equal radii and length tangents drawn at the point of contact of the particle
·Similar to the ratio of screen area to horsepower used to determine motor size a ratio of horsepower per hammer is used to determine how many hammers should be installed in the mill In a roll crusher material is fed from the top into a narrow gap called the nip between rotating cylindrical rolls which grind the material to the desired
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