建筑渣土/垃圾焚烧飞灰复合陶粒的制备研究综述OA

The synergistic resource utilization of construction spoil and municipal solid waste incineration fly ash represents a significant direction for the reduction and high-value application of solid waste.This study systematically reviewed the research progress in the preparation of ceramsites from construction spoil/fly ash composites,with a focus on analyzing the matching of raw material chemical compositions,optimization of mix proportions and sintering regimes,and the mechanisms of pollutant stabilization.Studies indicated that Si-Al-rich construction spoil could effectively compensate for the insufficiency of silicon and aluminum in fly ash,while components such as CaO and Fe2O3 in fly ash exhibited significant fluxing effects.Under high-temperature conditions,these components promoted the formation of a continuous glass phase and optimized the pore structure.The high-temperature sintering process could simultaneously achieve efficient degradation of dioxins and multi-mechanism immobilization of heavy metals,with leaching concentrations generally meeting relevant standard requirements.Furthermore,it was pointed out that the introduction of machine learning methods for multi-objective mix proportion optimization and process parameter inversion was a potential direction to enhance the stability and engineering applicability of composite ceramsites.This study provided a reference for the synergistic disposal of construction spoil and municipal solid waste incineration fly ash,as well as the large-scale preparation of ceramsites.