Cast Porous Charges on a Base of Ammonium Nitrate-Urea Eutectic

• Autorzy: Litovka O. B. , Kozak G. D. , Chugreeva E. Y. , Starshinov A. V.
• Języki publikacji: EN

Abstrakty

EN

There are great number tasks of explosive technique, requiring the charges with low pressure and detonation velocity. Powerful tool of regulation of these parameters is lowering of charge density. The main goal of this work is elaboration of technology of manufacture and investigation of explosive properties of charges on a base of eutectic ammonium nitrate-urea mixtures (AN/UR) that have melting point T[m] < 100 C. The physicochemical properties of these mixtures were investigated by means of DSC method and fusion diagram of them was plotted. The composition AN/UR 80/20, that has Tm= 80-90 C was chosen for subsequent investigation. The molten composition was mixed with fine aluminum powder, portion of it was placed into paper tube. The level of a liquid was less than length of the tube. Crystallization of melted mixtures was carried out in vacuum chamber, the level of liquid increased at pumping because of expansion of air bubbles introduced with aluminum particles and reached the upper cork of tube. In such a way porous charges were formed. The dependence of charge density vs. population of tubes by melted mixtures was plotted. Calculated heat explosion of mixtures at content of aluminum Al = 10-15% is Qv = 4.5-5.3 MJ/kg, calculated detonation velocity at density ρ = 0.5-1 g/cm3 changes from D = 3.2 to 5.2 km/s. Detonability of charges was investigated experimentally. Failure diameter (df) of detonation was measured, it was df = 22 mm (ρ = 0.6-0.7 g/cm3) for charges without confinement at initiation by means of booster or blasting cap.

Słowa kluczowe

EN

eutectic; ammonium nitrate; urea; fusion diagram; detonability; detonation velocity

• Wydawca: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2008
• Tom: Vol. 5, nr 2
• Strony: 57--66
• Opis fizyczny: Bibliogr. 9 poz.

Twórcy

autor

Litovka O. B.

autor

Kozak G. D.

autor

Chugreeva E. Y.

autor

Starshinov A. V.

• Mendeleev University of Chemical Technology, Miusskaya Sq. 9,125190 Moscow, Russia,

Bibliografia

• [1] Kondrikov B.N., Kozak G.D., Starshinov A.V., Critical Conditions of Low and High Velocity Regimes in Liquid Nitrocompounds, Paper summaries - The 11th Int. Detonation Symposium, USA, Snowmass, Colorado, 1998, pp. 231-234.
• [2] Kozak G.D., Kondrikov B.N., Sumin A.I., Dependence of Detonation Velocity on Charge Density for Foamed Alumotole (Al/TNT) and TNT Mixtures, Combustion, Explosion and Shock Waves, 1998, 34(4), 448-452.
• [3] Litovka O.B., Starshinov A.V., Kozak G.D., Design-Experiment Investigation of ANFO Mixtures on a Base of Different Brand Marks of Porous Grill Ammonium Nitrate, Trans. of the 10th seminar “New trends in research of energetic materials, Univ. Pardubice, Czech. Republic, April, 2007, pp. 742-752.
• [4] Arinina S.V., Kozak G.D., Heat of Melting of Nitrocompounds Measuring by Means of the Differential Scanning Calorimeter Method, Trans. of the 9th seminar “New trends in research of energetic materials”, Univ. Pardubice, Czech. Republic, April, 2006, p. 473-479.
• [5] Sumin A.I., Gamezo V.N., Kondrikov B.N., Raikova V.M., Shock and Detonation General Kinetics and Thermodynamics in Reactive Systems Computer Package, Trans. of the 11th Int. Detonation Symposium, USA, Bookcomp, Ampersand, 2000, pp. 30-35.
• [6] Kozak G.D., Akinin N.I., Raikova V.M., Arinina S.V., Explosion Hazard of Some Organic Peroxides, Proc. 6th seminar “New trends in research of energetic materials”, Univ. Pardubice, 2003, pp.173-181.
• [7] Kozak G.D., Raikova V.M., Aleshkina E. I., Critical Conditions of Diffusion and Photorecording Procedure of Detonation Process, (Rus.), Publish center of Mendeleev University of chemical technology, Moscow 2005.
• [8] Annikov V.E., Kondrikov B.N., Akinin N.I., Kozak G.D., Properties and Safety of Explosive Slurry in: Reliable and safety of technological processes, (Rus), Publish center of Mendeleev University of chemical technology, Moscow 2006, pp. 5-25.
• [9] Kondrikov B.N., Annikov V.E., Kozak G.D., Generalized Dependence of Failure Diameter of Detonation of Porous Substance vs. Density, (Rus.), Combustion, Explosion and Shock waves, 1997, 33(2), 111-123.