Effects of moisture content of grinding mill water ratio of the unloading, storage and other operations, we provisions shall not be more than 1%, does not make provisions for grade III grinding mill. The high calcium grinding mill, water will significantly affect the activity of grinding mill, and caused the curing caking.

Three sulphur trioxide, Magnesium Oxide, effective alkali content typically grinding mill three sulphur trioxide, Magnesium Oxide, effective alkali is considered to be of the concrete of harmful substances, its content is generally small, so the extent of the damage is not high. Sulfate, alkaline materials and effective under certain conditions may have some beneficial effects, but often in order to guarantee for the quality of grinding mill in concrete, all content on this class of substances restrictions in countries of the specification.

We are under three sulphur trioxide is not greater than 3%. Systolic American ASTM C - 618 standard on grinding mill mortar maximum systolic 28d increase in the value of 0.03%, although this provision is not mandatory, but it is good to have on the use of grinding mill.

Our country's relevant norms, standards and procedures of contractility are not specified. - uniformity uniformity of American ASTM C 618 standard on Fly Ash Fineness and density are clearly defined range of not more than 5%, which is an important index of the quality of grinding mill, can not be ignored.