Explosive pelletized

Detonation (and Explosion), Propagation Through Layers of Non-explosive Substances Between Explosive Pellets. This problem was investigated at the USBurMines and reported by C.M. Mason et al, Progress Rept Oct-Dec 1950. A brief description of this work is given under " Detonation (and Explosion) by Influence, 1 Ref 12 Note The non-explosive layers between explosive charges are known as barriers... 

Leopold also demonstrated that it is necessary to have contact between the explosive and the electrodes for initiation to occur. No initiations were observed with any of the test explosives when the explosive pellets were insulated from... 

Nitroglycerin (explosives) Nitromannitol (explosives) Nitrostarch (explosives) Nitrosugars (explosives) Pentolite (explosives) Permissible explosives Picric acid (explosives) Powder, explosive pellet. 

I the shockwave changes llic slaic of llic explosive so tliat cxotiierinic reactions lake place. Hgiire 3.4 shows a schematic diagram for the progression of a wave front through a cylimh ical explosive pellet. 

Dent tests, or witness plate tests are made for each of the explosive materials that we study. We do this so that we can determine the slapper electrical energy, or the slapper size that is needed for the explosive pellet to reliably produce a dent larger in diameter than the pellet in a steel plate or rod held in contact with the pellet. Not only does this convince us that the pellet is detonating, but we are assured that we have minimized conditions that lead to variability we sometimes find in mass spectral intensity. 

Most modem projectiles and virtually all missiles contain explosives. The plasmas that result from explosives are intrinsic to operation of warheads, bombs, mines, and related devices. Nuclear weapons and plasmas are intimately related. Plasmas are an inevitable result of the detonation of fission and fusion devices and are fundamental to the operation of fusion devices. Compressed pellets, in which a thermonuclear reaction occurs, would be useful militarily for simulation of the effects of nuclear weapons on materials and devices. 

Through-ckculation compartments employ perforated or screen bottom trays and suitable flow baffles so gas is forced through the material. If material is not inherently pervious to gas flow, it may be mechanically shaped iato noodles, pellets, or briquettes. These dryers are used ia small-scale operations to dry explosives, foods, and pigments. Dryer efficiency is 50—70%. Based on tray area, water vaporization rates are 1—10 kg/(h-m ). 

Solids handling frequently has the potential for dusting, which can lead to potential health and explosion hazards. Handling solids in the form of larger particle size granules or pellets rather than a fine powder reduces the potential for worker exposure. Worker exposure hazards are reduced by formulating dyes as liquids or wet pastes rather than dry solids or powders (Burch, 1986). 

Elemental Analysis, 2) Determination of Pellet Weight in Primers, 3) Determination of Gunpowder Residues in Forensic.Investigations, 4) Detection of Explosives in Buried Mines, 5) Detection of Hidden Explosives in Baggage, and 6) Explosives Safety in Neutron Activation Analysis... 

Pellet Loading. See under Loading and Fabrication of Explosives in Vol 7, L46 to L57... 

Tetryl is a pale yellow solid, melting at 129°C. It is moderately sensitive to initiation by friction or percussion. Tetryl is most used in the form of pressed pellets as primers for other less easily initiated explosives. 

All the explosives used for military purposes are in general very insensitive and except in the smallest hand grenades a gaine or booster is used to ensure proper initiation. Such gaines are usually made by compressed pellets of tetryl inserted as a column into a metal tube inside the explosive charge. 

Gunpowder was supplied in pellet form as a propellant and the substitutes were similarly manufactured. They were therefore called powders. Subsequent developments have led to the provision of propellent explosives in special and often massive form. Nevertheless, the term powder is still retained for their nomenclature, and the individual unit of the charge, no matter how large, is still called a grain. 

Dining interaction at ambient temperature in a bomb to produce poly (carbon monofluoride), admission of fluorine beyond a pressure of 13.6 bar must be extremely slow and carefully controlled to avoid a violently exothermic explosion [1], Previously it had been shown that explosive interaction of carbon and fluorine was due to the formation and decomposition of the graphite intercalation compound, poly (carbon monofluoride) [2], Presence of mercury compounds prevents explosion during interaction of charcoal and fluorine [3], Reaction of surplus fluorine with graphite or carbon pellets was formerly used as a disposal method, but is no longer recommended. Violent reactions observed when an exhausted trap was opened usually involved external impact on the metal trap, prodding the trap contents to empty the trap, or possibly ingress of moist air... 

While drying hydrazine over sodium hydroxide pellets, explosive decomposition occurred, spraying molten sodium hydroxide around. This was attributed to possible leakage of air into the evacuated flask. 

The pelleted explosive ( ammonpulver , containing 10% charcoal) normally ignites at 160-165°C, but presence of rust, or copper oxide or zinc oxide lowers the temperature to 80-120°C. 

---