Red mud magnesium oxysulfate cement foam material and preparation method thereof

The invention provides a red mud magnesium oxysulfate cement foam material and a preparation method thereof. The red mud magnesium oxysulfate cement foam material is prepared from the following raw materials: a magnesium sulfate solution, light calcined magnesia powder, red mud, reinforced aggregate, a foaming agent, a water reducing agent and a modifier. The preparation method comprises the following steps of: (1) pre-treating red mud; (2) preparing foam; and (3) preparing the red mud magnesium oxysulfate cement foaming material. The foaming material has the advantages of being high in waste doping amount, light in weight and high in strength, does not have the problems of anti-halogenation, scumming and the like, can replace ordinary Portland cement products and magnesium oxychloride cement products, is widely applied to inner and outer walls, pavements and the like of industrial and civil buildings, and has the effects of heat preservation, heat insulation, sound insulation, fire prevention and the like. 本