Harmless disposing method for red mud and ardealite

The invention discloses a harmless disposing method for red mud and ardealite.The method comprises the steps that the red mud and ardealite are mixed to be uniform to be prepared into slurry, or the red mud and ardealite are prepared into slurry and then mixed to be uniform; after mixing is conducted, the PH value of the slurry is neutral, or the PH value ranges from 6.5 to 7.5, and the PH value of diffusate meets the requirement of the grade III water quality or above in Environmental Quality Standards for Surface Water .According to the harmless disposing method for the red mud and ardealite, harmful stockpiling is changed into harmless stockpiling, the stockpiling water environment is greatly protected, the most difficult problems of the aluminum smelting industry and the phosphorus chemical industry are technically solved, and a good foundation is laid for comprehensively utilizing waste materials of the aluminum smelting industry and the phosphorus chemical industry.