Ball Mill Grinding Theory Crushing Motion/Action Inside
Open Circuit Grinding. The object of this test was to determine the crushing efficiency of the ball mill when operating in open circuit. The conditions were as follows: Feed rate, variable from 3 to 18 T. per hr. Ball load, 28,000 lb. of 5 , 4 , 3 , and 2½ in. balls. Speed, 19.7 r.p.m. Ball mill power, 88 kw.