5105Chemical EngineeringMedium
Half the angle of nip, (α), for a roll crusher is given by (where, dr, dp and df are diameters of crushing rolls, feed particles and rolls gap respectively)?
Asin α = (dr + dp)/(dr + df)
Bcos α = (dr + dp)/(dr + df)
Ctan α = (dr + dp)/(dr + df)
Dcos α = (dr + df)/(dr + dp)
Correct answer
B. cos α = (dr + dp)/(dr + df)
Explanation
The correct answer is cos α = (dr + dp)/(dr + df).