A multifunctional modified phosphorus tailing base polymer and its preparation method and application

Abstract

The present invention provides a multifaceted modified phosphorus tailings based geopolymer and its preparation method and application, and relates to the technical field of solid waste resource utilization and construction materials. The geopolymer of the present invention is prepared from solid-phase raw materials and alkali exciter, the solid-phase raw materials are composed of raw phosphorus tailings, modified phosphorus tailings and fly ash, of which the modified phosphorus tailings are phosphorus tailings activated by 600℃-800℃ high temperature roasting; the alkali exciter is a mixed solution of water glass and sodium hydroxide. The present invention adopts "partial activation Multi-compounding" process, the use of modified phosphorus tailings decomposition of active magnesium oxide and calcium oxide to stimulate the original phosphorus tailings and fly ash, significantly improve the comprehensive utilization of phosphorus tailings and reaction activity, the resulting products have high compressive strength, excellent resistance to high temperatures, resistance to sulfate erosion performance and heavy metals, and the ability to achieve the phosphorus ion sequestration. The resulting product has high compressive strength, excellent high temperature resistance, sulfate erosion resistance and heavy metal sealing ability, realizing the low energy consumption and high value utilization of phosphorus tailings.