Best energy consumption - International Cement ReviewFeb 16, 2015 . In either case, grinding is, by design, a very inefficient process. Figure 2: breakdown of electrical energy consumption at a typical cement plant. Figure 3: vertical roller mill. The ball mill has been the industry's workhorse for over a century and despite its estimated meagre four per cent efficiency, little has.most efficient cement ball mill,How to Make Milling More Energy Efficient - Siemensstep is to grind the clinker in a ball mill equipped with steel balls of varying sizes. depending on the type of cement, other materials such as granulated blast furnace slag can be added at the grinding stage. The mill control can be opti- mized based on predicted quality parameters, which in turn reduce energy consumption.