Method for defluorination and denitrification through secondary aluminum ash pyrogenic process

The invention provides a method for defluorination and denitrification through a secondary aluminum ash pyrogenic process. Harmless detoxification treatment of aluminum nitride and fluoride toxic components in secondary aluminum ash is achieved through the means of burdening, mixed grinding, roasting, tail gas absorption treatment and the like, and an obtained high-aluminum slag initial product can serve as a high-quality raw material in the industries of aluminum oxide production, refractory material preparation and the like; and the fluorine-containing tail gas passes through an absorption part and is stably cured to obtain harmless fluorine residues, and meanwhile, the recycling of absorption liquid is realized. The method opens up a new treatment way for harmless treatment and high-value utilization of the aluminum ash hazardous waste generated in the aluminum industry. 本发明提供了一种二次铝灰火法脱氟脱氮的方法，通过配料、混磨、焙烧、尾气吸收处理等手段，实现了二次铝灰中氮化铝、氟化物毒性组分的无害化解毒处理，所得高铝渣初产品可作为氧化铝生产、耐火材料制备等行业的优质原料；含氟尾气经吸收处、稳定固化后得到无害的氟渣，同时实现吸收液的循环使用