Red mud composite filler and preparation method thereof

The invention relates to the field of urban sewage and resource reutilization, and particularly discloses a red mud composite filler and a preparation method thereof.The red mud composite filler is prepared from, by weight, 35-85 parts of red mud, 1-10 parts of tourmaline powder, 15-50 parts of carbon material powder, 0.5-2 parts of binder, 10-50 parts of water, 0.1-1 part of clay mineral, 20-60 parts of polyethyleneimine and 6-14 parts of Tris-HCl buffer solution; according to the red mud composite filler disclosed by the invention, the red mud is modified into sulfonated coupling modified red mud through mutual cooperation of the mixing amounts of the raw materials, and meanwhile, the firing temperature and time of the red mud composite filler are adjusted, so that after the obtained red mud composite filler is applied to urban sewage treatment, the quality of treated water is detected; and a good urban sewage purification effect is achieved. 本申请涉及城市污水和资源化再利用领域，具体公开了一种赤泥复合填料及其制备方法，其中，一种赤泥复合填料包括如下重量份原料：赤泥35-