The grindability test has a moderate range of degree of fineness and departure from the range would result in excessive consumption of grinding work.
易磨性试验存在一个适宜的细度范围，偏离这一范围就有可能导致粉磨功的大量消耗。
2
The properties of the composite cement were studied by orthogonal test, which was prepared by the clinker, slag and fly ash with different fineness and mixed after separately grinding.
In flotation test and production it is often the case that, the fineness of milling material is overstressed while the effect of its particle size composition on the flotation neglected.