Experimental Study of the Explosion Characteristics of Energy-Containing Materials Nto’s Lead Salt Dust

Abstract

ABSTRACT The explosion characteristics of NTO’s lead salt as an energy-containing material are significantly different from those of ordinary dust. In order to systematically recognize its hazards in the production, storage, and transportation processes, the lower limit of explosion concentration, explosion pressure, pressure rise rate, and minimum ignition energy were systematically studied using the self-made 5 L column-type dust explosion test system and the modified 1.2 L steel Hartmann tube, respectively. The findings demonstrate that the explosion pressure and pressure rise rate gradually increase with the dust concentration; compared with ordinary dust, there is no maximum explosion pressure; the pressure rise rate has an inflection point of 550 g/m 3 , and if the concentration is greater than 550 g/m 3 , the pressure rise rate increases sharply. The explosion pressure is only slightly influenced by the pressure of powder spraying, which is inversely related to the rate of pressure rise. Contrary to the typical tendency of ordinary dust, where the ignition energy initially reduces and then increases with increasing concentration, the ignition energy tends to decrease as the dust concentration increases. As electrode spacing grows, the ignition energy tends to rise, and as concentration rises, the influence of electrode spacing progressively declines.