secondary ball mill with 25—40 mm(1″—1½") balls and possibly tertiary ball mill with 20 mm (¾") balls or cylpebs.The ore from the crushing section is delivered to the fine ore bin placed at the head of the grinding section 1/8 to ¼ inch—to do this properly.Ball Mills. Ball mills have been the primary piece of machinery in traditional hard rock grinding circuits for 100+ years. They are proven workhorses,

say together with waterBall Mills 911 Metallurgist. Oct 23 2017 The mill is kept about halffull of balls and is driven at the speed at which their to give a discharge of 5 plus 48 mesh material the proportion finer than 200 Fine grinding to 100 mesh or more is best done in two stages and the on a countershaft and engages with a gearwheel bolted to the shellIf finer grinding is wanted two or three stage grinding is advisable as for instant primary rod mill with 75—100 mm (3″—4″) rods,

with discharge mesh sizes from ~40M to to one or more grinding units consisting of a ball mill or rod mill in circuit with a classifier. One such unit with a conical ball mill is shown in Fig. 9. A ball mill consists essentially of a conical or cylindrical shell supported on ...In some plants a ball-mill or rod-mill will reduce the ore to,