化工进展2025，Vol.44Issue(3)：1716-1725,10.DOI:10.16085/j.issn.1000-6613.2024-0421
硅铝矿物组分对垃圾焚烧飞灰熔融特性与重金属固化的影响
Effects of silicon-aluminum mineral components on the melting characteristics and the solidification of heavy metal of municipal solid waste incineration fly ash
摘要
Abstract
Melting is an efficient method for harmless disposal of municipal solid waste incineration fly ash.Experimental study on the co-melting of silica-aluminum additives with fly ash was carried out to analyze the effects of different silica-aluminum mineral components on the melting characteristics and the solidification of heavy metals of fly ash.It was found that the silica-aluminum components and thermal treatment temperature had significant impacts on the melting of fly ash and the chlorinated volatilization of heavy metals.Among them,the addition of SiO2 could effectively reduce the melting temperature of fly ash.When the addition amount was 20%,a large number of amorphous vitreous bodies began to appear in the product.The addition of a moderate amount of Al2O3 helped the solidification of heavy metals,but it had no obvious promotion effect on the melting of fly ash.High temperature and the addition of Si-Al mineral components were conducive to the promotion of the direct or indirect chlorination of heavy metals,making them volatilize in the form of chlorides,while alkali metal silica-aluminates were produced.In addition,montmorillonite was superior to kaolin in promoting the melting of fly ash and solidifying heavy metals,and the continuous leaching toxicity of the thermal treatment products could meet the standards.关键词
垃圾焚烧飞灰/硅铝矿物组分/熔融/重金属/氯化反应/连续浸出Key words
municipal solid waste incineration fly ash/silicon-aluminum mineral components/melting/heavy metals/chlorination reaction/continuous leaching分类
资源环境引用本文复制引用
高嘉炜,赵佳琪,黄亚继,王圣,朱志成,肖怡萱,宋惠康,刘俊,祁帅杰,张煜尧..硅铝矿物组分对垃圾焚烧飞灰熔融特性与重金属固化的影响[J].化工进展,2025,44(3):1716-1725,10.基金项目
江苏省科技计划(BE2022604,BE2021701). （BE2022604,BE2021701）
