本文選題：鎂粉塵云 + 最低著火溫度�。� 參考：《科學(xué)技術(shù)與工程》2015年16期

【摘要】：為評價鎂粉著火燃燒危險性及惰性粉體對鎂粉著火燃燒的抑制作用,采用Godbert-Greenwald恒溫爐裝置研究了噴粉壓力、濃度、粒徑及惰性粉體Ca CO3、Si O2對鎂粉塵云最低著火溫度的影響。結(jié)果表明:噴粉壓力為0.03 MPa時,最有利于鎂粉著火燃燒;鎂粉塵云的最低著火溫度隨濃度的增加而降低,存在最小危險濃度,5.45 kg/m3;高于此濃度,鎂粉塵云的最低著火溫度幾乎不變;鎂粉粒徑減小,其最低著火溫度降低;鎂粉塵云最低著火溫度隨Ca CO3、Si O2含量的增加而先升高后趨于穩(wěn)定;惰性粉體濃度低于52%時,Ca CO3的抑制效果強于Si O2;高于52%時,Si O2的抑制效果強于Ca CO3;當(dāng)爐體溫度高于630℃時,Ca CO3與Si O2對鎂粉的抑制效果較弱。
[Abstract]:In order to evaluate the danger of ignition and combustion of magnesium powder and the inhibition effect of inert powder on ignition combustion of magnesium powder, the effects of powder injection pressure, concentration, particle size and inert powder Ca CO _ 3 / Sio _ 2 on the minimum ignition temperature of magnesium dust cloud were studied by Godbert-Greenwald constant temperature furnace. The results show that when the injection pressure is 0.03 MPa, the ignition temperature of magnesium dust cloud decreases with the increase of concentration, and the minimum dangerous concentration is 5.45 kg / m ~ 3, which is higher than this concentration. The minimum ignition temperature of magnesium dust cloud is almost unchanged, the minimum ignition temperature of magnesium dust cloud decreases and the minimum ignition temperature of magnesium dust cloud decreases with the increase of the content of Ca CO _ 3 / Sio _ 2, and then tends to be stable with the increase of Ca _ (CO _ 3) O _ (3) Sio _ 2 content. When the concentration of inert powder is lower than 52 鈩，

本文編號：1851950