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PROBLEMS 2 9 . 1 . Trap rock is crushed in a gyratory crusher. The feed is nearly uniform 2 - in . spheres. The
PROBLEMS Trap rock is crushed in a gyratory crusher. The feed is nearly uniform in spheres. The differential screen analysis of the product is given in column of Table The power required to crush this material is ton. Of this is needed to operate the empty mill. By reducing the clearance between the crushing head and the cone, the differential screen analysis of the product becomes that given in column in Table From a Rittinger's law and b Kick's law, calculate the power required for the second operation. The feed rate is tonh TABLE Data for Prob. tableProductMeshtableFirst grindtableSecond grind
PROBLEMS
Trap rock is crushed in a gyratory crusher. The feed is nearly uniform in spheres. The differential screen analysis of the product is given in column of Table The power required to crush this material is ton. Of this is needed to operate the empty mill. By reducing the clearance between the crushing head and the cone, the differential screen analysis of the product becomes that given in column in Table From a Rittinger's law and b Kick's law, calculate the power required for the second operation. The feed rate is tonh
TABLE
Data for Prob.
tableProductMeshtableFirst grindtableSecond grind
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