Unfired magnetic ceramsite prepared from steel slag and red mud compounded mining and metallurgy solid waste as well as preparation method and application of unfired magnetic ceramsite

The invention discloses unfired magnetic ceramsite prepared by compounding steel slag and red mud with mining and metallurgy solid waste and a preparation method and application thereof.The method comprises the steps that (1) the steel slag, the red mud, the mining and metallurgy solid waste, water-soluble cellulose and an inorganic polymeric flocculant are weighed according to the mass part, the steel slag, the red mud and the mining and metallurgy solid waste are mixed, and a solid waste mixture A is obtained; mixing water-soluble cellulose with an inorganic polymeric flocculant to obtain a mixed solution B; (2) putting the solid waste mixture A and a dispersing agent into a ball milling tank for full ball milling to obtain uniformly mixed solid waste mixture powder; and (3) placing the solid waste mixture powder in a disc type granulator, granulating the solid waste mixture powder into balls under the condition of continuously spraying the mixed solution B, then aging at room temperature, then drying, fina