A kind of NTO base PBX explosive modeling powder manufacture method

Abstract

The invention discloses a method for manufacturing NTO-based PBX explosive molding powder. Dissolve crude NTO in heated water, add dropwise sodium bicarbonate aqueous solution to neutralize the residual acid, quickly cool down and stir at high speed to precipitate NTO solid, filter and dry to obtain NTO recrystallized product. The NTO recrystallized product that meets the particle size requirements is added to the binder solution to form a suspension, and the supercritical coating technology is used to prepare the modeling coarse powder. Adopt 70°C-120°C-70°C programmed heat preservation to obtain NTO-based PBX explosive molding powder. In the present invention, the NTO recrystallized product has a purity of 99.4%, a residual acid of 0.03%, and a moisture content of 0.05%. The manufactured PBX explosive modeling powder is fully coated, which can ensure the safety of the subsequent press-fitting process and the tensile strength and compressive strength of the press-packed powder.

Description

technical field [0001] The invention belongs to the research field of manufacturing and processing of explosive molding powder, in particular the manufacturing and processing of NTO-based PBX explosive molding powder and the research field of NTO refining process. Background technique [0002] 3-Nitro-1,2,4-triazol-5-one (NTO for short) is a high-energy, low-sensitivity elemental explosive with excellent comprehensive properties. Its appearance is white or light yellow crystal particles. The crude NTO was obtained by nitrating 1,2,4-triazol-5-one, and then recrystallized to improve the purity and crystal form. [0003] Various NTO-based mixed explosive formulations have been studied abroad and have been applied in some weapon systems. Domestic research on this type of formula started relatively late. [0004] At present, there are mainly three types of NTO-based explosive formulations: cast explosives, plastic bonded explosives (PBX) and molded explosives. France, the Uni...

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Problems solved by technology

[0025] The disadvantage is: the use of supercritical CO 2 When coating the prepared NTO-based PBX explosive molding powder, part of the NTO crystals will be debonded due to the final stage of rapid pressure relief (quick release)

[0029] (1) The NTO-based PBX explosive molding powder manufactured by the supercritical method is incompletely coated, and part of the NTO is "debonded", which increases the danger of the subsequent press-fitting process;

[0030] (2) The "debonded" NTO crystal contact reduces the tensile strength and compressive strength of the press-filled powder column, and cracks are prone to occur under environmental stress, which affects the detonation performance of the explosive;

[0032] (4) The process of rinsing residual acid and recrystallization to improve the crystal form of crude NTO is more complicated, the loss of NTO is larger, and the amount of waste liquid generated is larger

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