粒度对镁铝合金粉最低着火温度的影响  

Influence of Particle Size of Magnesium-Aluminum Alloy on Minimum Ignition Temperature

作　　者：王霞飞[1] 谭迎新[1] 范永祥[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《中国粉体技术》2016年第2期98-101,共4页China Powder Science and Technology

摘　　要：为了研究粉尘粒径对镁铝合金粉的最低着火温度的影响规律,采用Godbert-Greenwald恒温炉装置测试不同粒径镁铝合金粉的最低着火温度,利用多个模型对实验数据进行曲线拟合,并利用确定系数、估计值标准误差、总相对误差、平均系统误差、平均预估误差、平均百分标准误差共6项指标对模型进行评价,以解决因实验数据量少而无法进行模型检验的问题,并得到拟合的最佳模型。结果表明:随着粉尘粒径的增大,镁铝合金粉的最低着火温度升高;在双参数的情况下,Tmi=a0ea1d模型(a_0、a_1为参数,d为粒度,T_(mi)为最低着火温度)拟合结果较其他模型最优;在3个参数的情况下,T(mi)=a0+a1d+a2lg d模型(a_2为参数)拟合结果较其他模型最优。To study the influence rule of particle size on minimum ignition temperature of magnesium-aluminum alloy powders, the Godbert-Greenwald furnace apparatus was used to measure the minimum ignition temperature of magnesium-aluminum alloy powders with different particle sizes, the experimental data were used to fit curves by choosing a variety of models. Six indexes such as coefficient of determination, standard error of estimate, total relative error, mean system error, mean prediction error, mean percent standard error were used to evaluate the models, so that the problem of no way to examin models due to less experimental data was solved and the best fitting model wsa obtained. The results show that the minimum ignition temperature increases with the increase of particle size. In the case of double parameters, the model Tmi=a0ea1d（a_0 and a_1 are parameters, d is particle size, T_（mi） is minimum ignition temperature） is the best fitting result. In the case of three parameters, the model Tmi=a0＋a1d＋a2lg d（a_2 is a parameter） is the best fitting result.

关 键 词：镁铝合金粉 最低着火温度 粒度 曲线拟合 

分 类 号：X932[环境科学与工程—安全科学]