The relationship between grinding energy requirement and Lp content can be described by a second-order polynomial (solidline).
The extremum points of the polynomial where the energy requirement is maximum increase linearly with increasing
fineness (20.22, 21.89, and 23.35 for 2800, 3400, and 4000 cm2/g, respectively).
However, for Blaine finenesses around 3000 cm2/g, the relationship between grinding energy and Lp content
can be approximated as a line where energy decreases with increasing Lp.