Heavy ANFO and a tailored expanded polymeric density control agent
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United States of America Patent
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Mar 22, 2016
Grant Date -
Feb 19, 2015
app pub date -
Apr 14, 2014
filing date -
Oct 10, 2005
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Abstract
The present invention is directed to an explosive composition comprised of heavy ANFO and expanded polymeric beads that have a density that is less than the density of the heavy ANFO. The expanded polymeric beads have a size that is determined or based on the size of ammonium nitrate prills used in the heavy ANFO portion of the composition. In one embodiment, the expanded polymeric beads that are utilized in the composition are at least 70% of the lower limit of the mesh size of the predominant ammonium nitrate prill mesh size. In another embodiment, the expanded polymeric beads are at least 70% of a size that is related to the average mesh size of the ammonium nitrate prills.
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