Method for manufacturing molding powder by recycling NTO in waste cast explosives

Abstract

The invention discloses a method for manufacturing molding powder by recycling NTO in waste cast explosives. The method includes: extracting the cast explosive with hot water, and cooling, filtering and drying the cast explosive; washing thecast explosive with methylbenzene, and filtering and drying the cast explosive to obtain an NTO crude product; 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 NTO with a certain particle size into the adhesive solution to form a suspension, and preparing a shaped coarse powder by adopting a supercritical coating technology; and carrying out programmed heat preservation at the temperature of 70-120 DEG C and 70 DEG C to obtain the NTO-based PBX explosive molding powder. The purity of the recovered NTO isgreater than 99%, the recovery rate is greater than 82%, and the recovery process is simple, green and environment-friendly. According to the method disclosed by the invention, the coating degree ofthe NTO crystal by the adhesive is improved, the thermal safety is improved, and the acid corrosion of NTO to the warhead shell can be prevented.

Description

technical field [0001] The invention belongs to the field of propellants and explosives, and mainly relates to a method for recovering NTO from NTO-based waste melting and casting explosives, and the research field of manufacturing and processing NTO-based PBX molding powder explosives. Background technique [0002] The explosives used in weapons and ammunition have a certain storage and service life. After a period of storage, the safety and reliability of its storage and use may change dramatically, thus becoming discarded explosives. In addition, the production of explosives and the upgrading of weapon systems will also produce waste explosives. In general military powers, thousands of tons to tens of thousands of tons of discarded explosives are accumulated every year. Abandoned explosives still have the characteristics of combustion and explosion, and most explosives are toxic. If they are not handled or handled improperly, they will seriously endanger human life and p...

AI Technical Summary

Problems solved by technology

[0038] The disadvantage is that the NTO molding powder prepared by supercritical coating will cause some NTO crystals to debond due to the final stage of rapid pressure relief (quick release)

[0043] (2) The process of rinsing residual acid and recrystallization to improve the crystal form of NTO crude product is more complicated, the loss of NTO is larger, and the amount of waste liquid generated is larger;

[0044] (3) The PBX explosive molding powder manufactured by the supercritical method is incompletely coated, and part of the NTO is "debonded", which increases the risk of the subsequent press-fitting process; The tensile strength and compressive strength of the explosive are easy to produce cracks under environmental stress, which affects the detonation performance of explosives;

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