| abstract |
A water-absorbing and water-retaining composite material with iron tailings as inorganic organisms and a preparation method thereof belong to the field of comprehensive utilization of solid wastes. The composite material is a mineral/organic matter water-absorbing and water-retaining composite material, wherein the mineral is iron tailings or a mixture of the iron tailings and fly ash; the organic matter is the copolymer of ammonium polyacrylate and acrylamide. The preparation method comprises the following steps: according to the mass ratio, the iron tailing fine powder: and (1-6) coal ash: (0-1), uniformly mixing the fine iron tailing powder and the fly ash, and pretreating to obtain a mineral filler; preparing an ammonium acrylate reaction solution from ammonium bicarbonate and acrylic acid at room temperature; adding mineral filler, acrylamide and cross-linking agent into the ammonium acrylate reaction solution, stirring, mixing, dispersing, adding initiator, gelatinizing, and drying to obtain the composite material. The method has the advantages of simple operation, small organic matter consumption, low cost, strong process applicability and the like. |