|
As the percentage of voids decreases the number of such trapped particles increases, the amount of non-productive work likewise increases, and the material becomes harder to move as it becomes more compacted. Actually, there is some work being accomplished on this small material which might properly be classed as productive work; but, from the viewpoint of the commercial crushed stone producer at least, it is undesirable work: the atritional production of fines, mentioned in the preceding paragraph. The clean-breaking crusher is the economical crusher, both from the standpoint of power consumption, and general wear and tear. And, because the non-choking concaves make for cleaner breaking, they benefit the crusher in both of these respects. At com-parable discharge settings the power saving may run as high as 20 percent. |
