#### How it Works: Crushers, Grinding Mills and Pulverizers

E = E i (100/L 2) 1/2 [1 (1/q 1/2 )] Where: E=Energy, L 1 = initial length, L 2 =reduced length, E i is defined as the amount of energy required to reduce a material's unit mass from an infinitely large particle size to a size of 100 μm and L is measured in microns and q is the reduction ration L 1 /L 2.