基于F-K理论的抛光铝粉自燃特性及自燃临界条件  

Spontaneous Combustion Characteristics and Critical Conditions of Spontaneous Combustion of Polished Aluminum Powder Based on F-K Theory

作　　者：王鑫阳[1] 李刚[1] WANG Xin-yang;LI Gang(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2021年第10期1491-1497,1520,共8页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51774068);辽宁省自然科学基金资助项目(20180550757);中国博士后科学基金资助项目(2020M670784);东北大学博士后科研基金资助项目(20200203);中央高校基本科研业务费专项资金资助项目(N2101039).

摘　　要：采用网篮试验研究抛光铝粉自燃特性、自燃临界条件及氧化过程中温度时空分布规律.根据Frank-Kamenetskii(F-K)理论,分别采用差分法和交叉点温度法对试验数据进行分析,计算氧化反应动力学参数并对试验结果进行外推,预测工业现场堆积尺度下的最小自燃临界温度.研究结果表明:抛光铝粉的氧化进程符合Arrhenius动力学机制,反应活化能为105.4 kJ/mol;在试验室小尺寸网篮堆积状态下,铝粉的临界温度为215.5℃;当堆积尺度增大到工业现场集尘桶大小时,其值大幅下降至129℃.研究结果可为铝粉生产、储存和运输过程中自燃灾害的预防和控制提供理论参考.The wire-mesh basket experiment was used to study the spontaneous combustion characteristics,the critical conditions of spontaneous combustion and the temporal and spatial distribution of temperature in the oxidation process of polished aluminum powder.According to the Frank-Kamenetskii(F-K)theory,the difference method and the cross-point temperature method were used to analyze the experimental data,calculate the oxidation reaction kinetic parameters and extrapolate the experimental results,and predict the minimum spontaneous combustion critical temperature at the industrial site accumulation scale.The research results show that the oxidation process of polished aluminum powder conforms to the Arrhenius kinetic mechanism,and the reaction activation energy is 105.4 kJ/mol.The critical temperature of aluminum powder is 215.5℃ when the small size baskets are stacked in the laboratory.When the stacking size is increased to the size of the dust collecting bucket on the industrial site,the critical temperature drops to 129℃.The research results can provide a theoretical reference for the prevention and control of spontaneous combustion disasters during the production,storage and transportation processes of aluminum powder.

关 键 词：抛光铝粉 自燃 临界条件 活化能 网篮试验 

分 类 号：TP20[自动化与计算机技术—检测技术与自动化装置]