Method for increasing amount of mineral powder mixed into road cement

The invention discloses a method for increasing the amount of mineral powder mixed into road cement. The method comprises the following steps: adjusting grading of a grinder, namely providing a fine grinding chamber with an activating and flow liming ring to fulfill the functions of grinding, controlling flow and lifting, adjusting the grading of a grinding medium in the grinder according to the variety of materials and cement, adjusting integrated material parameters which include the size of a screening device, the ventilation of the grinder and the rotation speed of the grinder, and optimizing the power selection efficiency of the grinder; calibrating periodically, and examining a measuring scale; improving the strength of clinker; and adjusting the amount of granulated blast-furnace slag powder mixed into road cement so that the granulated blast-furnace slag powder accounts for 8.5wt%, the gypsum accounts for 5.0wt% and the clinker accounts for 86.4wt%. The method provided by the invention overcomes the problem of unreasonable grading of the grinder, poor measuring accuracy and low strength of the clinker in the prior art and has the advantages of reasonable grading of the grinder, good measuring accuracy and high strength of the clinker.