Explosives

Details Explosives Explosives

C - Chemistry, Metallurgy

06

B

C06B 31/28 (2006.01) C06B 31/30 (2006.01)

Patent

CA 2103792

An explosive composition comprising an oxidising agent such as ammonium nitrate (AN), and a fuel material which may include a fuel oil (FO) and which also comprises a solid fuel such as rubber particles or polystyrene beads ar flakes. The solid fuel is incorporated into the composition to provide for the controlled release of energy upon detonation of the explosive composition. It has been found that by substituting some or all of the liquid feel oil with a slower burning solid fuel, the time during which the pressure builds up during detonation is lengthened. Thus a low shock energy explosive (LSEE) can be produced having reduced shock energy and increased heave energy compared to conventional explosives, such as ANFO.

Composition d'explosif comprenant un agent d'oxydation tel que du nitrate d'ammonium (NA), et un matériau combustible qui peut renfermer un mazout et comprenant également un combustible solide tel que des particules de caoutchouc ou des billes ou des flocons de polystyrène. On incorpore le combustible solide dans la composition pour obtenir une libération commandée d'énergie lors de la détonation de la composition d'explosif. On a remarqué qu'en remplaçant une partie ou la totalité des huiles combustibles liquides par un combustible solide à combustion lente, on ralentit le temps pendant lequel la pression monte lors de la détonation. On peut ainsi produire un explosif à faible énergie par onde de choc possédant une énergie par onde de choc réduite et une énergie lente accrue par rapport aux explosifs classiques, tels que les explosifs à huile combustible au nitrate d'ammonium (HCNA).

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