爆炸与冲击2009，Vol.29Issue(4)：429-433,5.
镁粉尘云最低着火温度的实验测试
Measurement of minimum ignition temperature for magnesium dust cloud
摘要
Abstract
A standard Godbert-Greenwald furnace apparatus was used to measure minimum ignition temperatures of magnesium dust cloud under different conditions. Experimental results reveal that corresponding minimum ignition temperatures of dust cloud for four magnesium specimens with the medium grain diameters D_(50) of 6, 47, 104 and 173 Mm are 480,520,620,>700℃ , respectively. Take the magnesium powder with the grain diameter of 6 pm for example, under the constant diffusing pressure of 0.1 MPa, the minimum ignition temperature of the magnesium dust cloud decreases from 600 ℃ to 480℃ corresponding to the dust concentration changing from 424 g/m~3 to 5 085 g/m~3; and for the constant dust mass of 0.3 g, when the diffusing pressure increase from 0.1 MPa to 0.2 MPa, the minimum ignition temperature of this magnesium dust cloud increases from 540℃ to 580 ℃. And effects of grain diameter distribution, concentration and diffusing pressure on the minimum ignition temperature of magnesium dust cloud were analyzed by the above experimental results. It is helpful in the explosion-proof equipment design for the magnesium powder production.关键词
爆炸力学/粉尘云最低着火温度/G-G恒温炉/镁粉/粒径/浓度/分散压力Key words
mechanics of explosion/ minimum ignition temperature of dust cloud/ Godbert-Green wald setup/ magnesium powder/ particle size/ concentration/ diffusing pressure分类
数理科学引用本文复制引用
钟英鹏,徐冬,李刚,苑春苗,陈宝智..镁粉尘云最低着火温度的实验测试[J].爆炸与冲击,2009,29(4):429-433,5.基金项目
国家自然科学基金项目(50674023) （50674023）
