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采用无添加剂的氧化焙烧工艺处理以氮化铝和镁铝尖晶石为主要物相的二次铝灰,在不同焙烧温度、焙烧时间和富氧条件下,探究了氮化铝的氧化特性和有害元素F、Cl、K、Na的脱除情况。结果表明:在60 mL/min的充氧量气氛下1 100℃焙烧2 h,氮化铝可完全转化成氧化铝,此时氟、氯的脱除率分别为84%和99%,符合国家危废处理要求。经过焙烧预处理的二次铝灰可用于生产耐火材料,实现固废资源化综合利用的目的。
Abstract：Secondary aluminum dross with main phases of aluminum nitride and magnesium aluminate spinel was treated by non-additive oxidation calcination.Oxidation characteristics of aluminum nitride and removal of harmful elements(F,Cl,K,Na) were explored at different calcination temperatures,time and oxygen concentration.The results show that aluminium nitride can be completely transformed into alumina and removal rate of F and Cl is 84% and 99% respectively when aluminum dross is calcined at1 100℃ for 2 h in oxygen atmosphere,which meets the national requirements for hazardous waste treatment. Secondary aluminum dross pretreated by roasting can be used to produce refractory materials,and comprehensive utilization of solid waste resources is realized.
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基本信息:
中图分类号:X758;TQ175.4
引用信息:
[1]李雪倩,申士富,王玲,等.二次铝灰的焙烧特性和有害元素脱除研究[J].有色金属(冶炼部分),2020(09):69-74.
基金信息:
国家重点研发计划项目（2018YFC1901906）
2020-09-12
2020-09-12