Manufacturing method of NTO-based PBX explosive molding powder

Abstract

The invention discloses a manufacturing method of NTO-based PBX explosive molding powder. The method includes following steps: dissolving the NTO crude product in hot water, dropwise adding a sodium bicarbonate aqueous solution to neutralize residual acid, rapidly cooling and stirring the mixture at a high speed to separate out NTO solid, and filtering and drying the mixture to obtain an NTO recrystallized product; adding the NTO recrystallized products reaching the particle size requirement into the adhesive solution to form suspension liquid, and carrying out supercritical coating process toprepare the explosive molding crude powder; And carrying out programmed heat preservation at the temperature of 70 DEG C to 120 DEG C to 70 DEG C to obtain the NTO-based PBX explosive molding powder.The purity of the NTO recrystallized product is 99.4%, the residual acid content is 0.03%, and the water content is 0.05%. The manufactured PBX explosive molding powder is completely coated, so thatthe safety of a subsequent press-fitting process and the tensile strength and compressive strength of a press-fitting grain can be ensured.

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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