【摘要】 对生活垃圾焚烧飞灰与赤泥协同熔融处理的可行性及其对重金属固化效果的影响进行探讨。通过分析飞灰和赤泥的化学成分、协同熔融特性及熔融产物的成分、浸出毒性，评估高温协同熔融处理对降低熔融温度和重金属固化的影响。结果表明：飞灰和赤泥的协同熔融能够将流动温度从1 500℃以上降低至1 250℃左右，并能够缩短飞灰熔融过程。熔融产物主要为阿利尼特（Alinite）、瓦达石（Wadalite）和双钙钛矿等复杂硅酸盐矿物。浸出毒性测试显示，熔融处理对大多数重金属的固化效果显著，浸出浓度均低于相关标准限值。研究证实飞灰与赤泥协同熔融处理是一种有效的废弃物处理方法，可为实现“以废治废”提供新路径。更多还原

【Abstract】 The feasibility of co-melting municipal solid waste incineration(MSWI)fly ash with red mud and its synergistic effects on heavy metal immobilization were systematically investigated. Through analysis of the chemical composition,co-melting characteristics of fly ash and red mud,and the compositions of the melting products and its leaching toxicity,the effects of high-temperature co-melting treatment on both melting temperature reduction and heavy metal stabilization were evaluated. The experimental results demonstrated that the co-melting process could significantly reduce the flow temperature from above 1 500 ℃ to approximately 1 250 ℃ and shorten the melting process of fly ash. The main molten products were complex silicate minerals,including Alinite,Wadalite,and double perovskite. Leaching tests conducted that the molten treatment had a significant solidification effect on most heavy metals,and the leaching concentrations were all below the relevant standard limits. These findings collectively suggest that the co-melting treatment of MSWI fly ash with red mud represents an effective approach for waste treatment,providing a innovative pathway for achieving “waste treatment with waste”.更多还原