Determination of the Heat of an Explosion of Aluminized Blasting Compounds

Abstract

The results of investigating the heat from the explosion of individual and aluminized blasting compounds shows that, when testing an unconfined charges, the explosion’s products undergo intense secondary heating when they reach the wall of the calorimetric bomb’s inner cavity. Due to the secondary heating in the products, the chemical reactions are resumed, and the final composition of the products is frozen in conditions of slow cooling and low pressure. The inert metal casing in which a charge is placed attenuates the secondary heating since a significant part of the energy of the products is converted into the kinetic energy of the casing. The effect of filling a calorimetric bomb with an inert gas is similar to the action of a metal casing. In this case, the secondary heating temperature decreases due to the heat spent on heating the inert gas. When testing aluminized compositions, we need to use a heavy casing and fill the bomb with an inert gas (under pressure) in order to reduce the temperature of the secondary heating. The heat of explosion (HE) obtained under conditions when the secondary heating temperature does not reach the threshold value can be considered as a universal parameter that characterizes the energy content of an explosive material.