Prediction method of safe storage life of nitrate propellants and explosives charges

Abstract

The invention relates to a nitrate explosive charge safety storage service life estimation method. The method comprises the following steps of: preparing a stabilizer active content near-infrared quantification model sample, and establishing a stabilizer active content near-infrared quantification model; obtaining a stabilizer active content variation temperature coefficient by virtue of a heat acceleration aging test, and establishing a safety storage service life estimation equation; and using a consumption critical amount of the stabilizer active content as a critical criterion, tracking the stabilizer active content in the charging single temperature heat acceleration aging process by virtue of a near infrared method, obtaining a critical time when the active content reaches the consumption of the critical criterion, and estimating a safety storage service life of the nitrate explosive charge at the storage environment temperature by the safety storage service life estimation equation. The safety storage service life can be obtained by tracking the stabilizer active content at different aging time of one charge sample at one temperature by virtue of the near infrared method, the sample quantity is reduced by 96 percent, and safety and low cost can be realized.

Description

technical field [0001] The invention belongs to the technical field of propellant and explosive life evaluation, and relates to a method for predicting the safe storage life of propellant and explosive during storage. In particular, it uses near-infrared diffuse reflectance spectroscopy to detect the effective stabilizer content of nitrate propellants and explosives at a single temperature thermally accelerated aging sample, and obtains the critical time consumed by the effective stabilizer content to reach the critical criterion. According to the estimated safe storage life of the charge Equation, a method for estimating the safe storage life of nitrate propellants and explosives at storage ambient temperature. Background technique [0002] The safe storage life of propellants and explosives is the storage time before the propellant and explosives undergo autocatalytic accelerated decomposition under storage conditions. [0003] Nitrocellulose and nitroglycerin are the mai...

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Problems solved by technology

[0004] In the past, the thermally accelerated aging method was used to track the effective stabilizer content (GJB770B-2005 method 506.1 estimated storage life thermally accelerated aging method) to estimate the safe storage life of nitrate propellants and explosives, and the commonly used chemical titration method (bromine reacts with the stabilizer to form bromide The chemical method) or chromatographic method to determine the effective content of the stabilizer is a destructive detection method, and the effective content of the stabilizer of the pulverized sample is extracted by ether reflux for 24 hours or even longer. The low boiling point solvent ether is flammable and explosive. The preparation of ether extraction samples from aging samples of ester propellants and explosives is not safe, and the operation is cumbersome and time-consuming, and the bromide produced by chemical titration will cause pollution

[0005] According to the change law of effective stabilizer content of aging samples of nitrate propellants and explosives materials obtained at different temperatures, when using the Berthelot equation to estimate the safe storage life, due to the thermally accelerated aging test at 50 ° C ~ 95 ° C at least Four temperature points are used, and the number of sampling at each temperature point is at least 6 times. The amount of aging samples required is large, and the test lasts for more than 6 months, which is extremely time-consuming, and the long-term high-temperature heat-accelerated aging and mechanical cutting of nitrate High risk when preparing samples for extraction from propellant-like explosive aging samples

[0006] For the thermally accelerated aging test of nitrate propellants and explosives with a certain size, heat accumulation will occur during the heating process. On the one hand, it will lead to uneven distribution of temperature field and uneven distribution of stabilizer content. The multi-temperature point aging test of the charge is very prone to combustion and explosion accidents due to heat accumulation. Therefore, it is difficult to obtain the stabilizer content through the multi-temperature point aging test of the charge and use chemical titration or chromatography to carry out new formula long-life charge. Prediction of safe storage life during design and storage, so new methods are needed

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