The invention provides composite
solid-waste lightweight high-strength haydite and a preparation method therefor. The composite
solid-waste lightweight high-strength haydite is mainly prepared from the following raw materials in parts by weight: 40.0-60.0 parts of iron
tailings, 10.0-15.0 parts of auxiliary raw materials and 0.1-3.0 parts of foamer. The composite
solid-waste lightweight high-strength haydite further contains
sludge, wherein the dry
sludge content of the
sludge is 30.0-50.0 parts. The preparation method comprises the steps: accurately weighing the sludge, the iron
tailings, the auxiliary raw materials and the foamer according to a designed ingredient proportioning ratio, and carrying out uniform mixing so as to form a uniform basic mixture; and carrying out granulating and shaping so as to obtain unburned haydite, burning the unburned haydite, and carrying out annealing and cooling, thereby obtaining municipal sludge and iron tailing cooperated haydite. The haydite is prepared from the sludge and the iron
tailings, which are cooperated with each other and serve as main raw materials, so that the sludge is subjected to harmless treatment and resource-converting utilization, the sludge, which is a municipal mineral product, is used for replacing a primary mineral
raw material, and thus the economic and environmental benefits are remarkable.