Effect of modified coated aluminum powder on the explosive properties of emulsion explosive

Abstract In order to investigate the effect of aluminum powder content on the detonation properties of emulsion explosives and to reduce the emulsion of aluminum powder on the emulsion explosives to improve their service life, the paraffin-coated spherical micron aluminum powder is used to prepare the proportion of 0%, 5%, 7%, 9%, 11%, 15%, and 20% of the aluminum-containing emulsion explosives. Using the chronometer method to determine the detonation velocity, the lead column compression method to assess its brisance, and conducting underwater explosion tests to calculate parameters such as shock wave energy, bubble energy, and total energy of the aluminum-containing emulsion explosives. Additionally, high and low-temperature cyclic accelerated aging tests are performed to study the effect of aluminum powder on the service life of the emulsion explosives. The results show that aluminum powder mass fraction of 5%, containing aluminum emulsion explosive detonation velocity, is the largest, 5459m·s −1 , with the increase of aluminum powder content, containing aluminum emulsion explosives detonation velocity of the overall trend of reducing. Briance first increased and then decreased, reaching a maximum value of 24.06mm in 15%. The total energy of the underwater explosion increases with the increase in aluminum powder content. In the aluminum powder mass fraction of 20% to reach the maximum, the shock wave energy increased by 26.7%, the bubble energy increased by 65.4%, and the total energy increased by 65.4%. The service life of paraffin-coated aluminum emulsion explosives is better than that of emulsion explosives containing ordinary aluminum powder service life.