214 • equation 214 gives the relationship between the size of the feed radius of rolls gap between the rolls and the angle of nip with this equation the roll diameter can be determined by knowing values of the size of feed size of product and angle of nip • if α 16 o then cos α and we have 0961 r dr r 215 • crushing rolls are widely used for crushing of oil seeds and in the.
Fill in the formA certain set of crushing rolls has rolls of 100 cm diameter by 38 cm width face they are set so that the crushing surfaces are 125 cm apart at the narrowest point the manufacturer recommends that they may be run at 50 to 100 rpm they are to crush a rock having a specific gravity of 235 and the angle of nip
A certain set of crushing rolls has rolls of 50 inch diameter by 20 inch width of face they are set so that the crushing surfaces are 05 inch apart at the narrowest point the manufacturer recommends that they be run 150 rpm they are to crush granite with an angle of nip is 30 what are the maximum permissible size of feed and the
And the horomill horizontal roller mill the rhodax was designed to achieve a high reduction ratio basically from 150mm to 1mm in a closed circuit in a single stage of crushing therefore the rhodax replaces both secondary and tertiary stages and even the first stage of grinding in most minerals industries in dry or wet
Calculation of nip angle jaw crusher jaw crusher c кб excellent nip angle high up in the cavity together with an aggressive linear stroke at the bottom ensure high throughput capacity and reductionsafe to operate and maintain the c120 jaw crusher is designed to be safe to operate and maintain get
Calculation of reduction ratio in crushing angle of nip varies for large crusher between 21 to 24 for curved surfaces the nip varies from 27 to 30 the distances between the concave surface and the mantle on top and bottom are usually used to describe the size of the
If a 2 inch particle is fed to the roll crusher the absolute smallest size one could expect from the crusher is 12 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 between the
It should also be noted that the value of the coefficient of friction decreases with speed so that the speed of the rolls depends on the angle of nip and the type of material being crushed the larger the angle of nip ie the coarser the feed the slower the peripheral speed needs to be to allow the particle to be
Jan 01 the nip angle is affected by the distance between the rolls the nip angle is defined as the angle that is tangent to the roll surface at the points of contact between the rolls and the particle it depends on the surface characteristics of the rolls usually the nip angle is between 20 and 30 but in some large roll crushers it is up to 40
Nip angle in a jaw crusher meaning of nip angle in jaw crusher c150™ jaw crusher cavity of the c series jaw crushers works extremely efficiently from the very top to the bottom thanks to great feed opening dimensions a good stroke up in the cavity tight nip angle angle between the fixed and movable jaw and the long amplified linear stoke in the bottom of the
The following formula relates the coefficient of friction m radius of rolls r radius of product d and radius of feed r cos a r d r r 1 where a is related to the coefficient of friction by the relation m tan a angle of nip 2
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