The investigation on the correlation between milling process parameters and energy consumption is well known . Hitherto the following empirical differential equation
dW = – C ∙ d– n⇥(1)
can be used generally, W being the energy demand, d the particle size, and C a material constant.
Depending on the values of the constant C and the exponent n, the equation is applied for calculation of the energy demand of various grinding processes. If the exponent is equal to 2, the equation conforms to the milling process after Rittinger
W = – CRitt ∫ dF d–2 d(d) = CRitt ( 1 – 1 )⇥(2)