Method for producing portland cement for road by blending iron ore beneficiation tailings in cement

The invention discloses a method for producing portland cement for road by blending iron ore beneficiation tailings in cement, and the method is used for solving the problem that the existing road is low in cement strength. The method comprises the following steps of: A. blending raw materials: 9-11% of iron ore beneficiation tailings, 73-79% of limestone beneficiation waste residue, 4-6% of aeolian sand and 6-12% of granulated blast-furnace slag; B. calcining clinker; and C. blending the cement. According to the method, the iron ore beneficiation tailings, the limestone beneficiation waste residue and the granulated blast-furnace slag are utilized as the raw materials, and desulfurized gypsum and granulated electric furnace phosphorous slag are utilized as accessories, thus saving the consumption of natural raw materials and reducing the cement production cost; the produced portland cement for road is higher in wear resistance and better in air shrinkage, is widely applied to a super highway, an airfield runway and other projects; and the product is good in market prospect and considerable in economic benefit.