Influence of physical properties of ammonium nitrate on the detonation behaviour of ANFO

Citation
A. Miyake et al., Influence of physical properties of ammonium nitrate on the detonation behaviour of ANFO, J LOSS PREV, 14(6), 2001, pp. 533-538
Citations number
7
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemical Engineering
Journal title
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
ISSN journal
0950-4230 → ACNP
Volume
14
Issue
6
Year of publication
2001
Pages
533 - 538
Database
ISI
SICI code
0950-4230(200111)14:6<533:IOPPOA>2.0.ZU;2-N
Abstract
In order to obtain a better understanding of the non-ideal detonation behav iour of ammonium nitrate based explosives, detonation velocities of ANFO (a mmonium nitrate and fuel oil) prepared with different kinds of ammonium nit rate (AN) were measured in steel tubes. In this series of test six kinds of AN were used and the influence of the pore diameter, the pore volume and t he particle diameter of the AN particle on the detonation velocity of ANFO was investigated. It was found that the pore diameter and the pore volume had a strong influe nce on the detonation velocities of ANFO. In the case of ANFO samples which were prepared with AN that had the same pore diameter and the pore volume, when tested the highest detonation velocity (3.85 km/s) was observed when the smallest particle diameter (<0.85 mm) was used. This value corresponded to 75% of the ideal detonation velocity, which was theoretically predicted by the CHEETAH code with the JCZ3-EOS. The 12 months aging showed the change of the detonation velocities of ANFO and the reaction of ANFO was influenced both by the physical and the chemic al properties of AN particles and oil during the storage period. (C) 2001 P ublished by Elsevier Science Ltd.