Waterproof type rock swelling ammonium nitrate explosive and preparation technique thereof

Abstract

The invention relates to a waterproof rock expanded ammonium nitrate explosive and a process for preparing the same. The ammonium nitrate explosive consists of 90 to 94 percent of nitrate oxidizing agent, 3 to 5 percent of combustible agent and 3 to 5 percent of composite oil phase, wherein the composite oil phase consists of 10 to 62.5 percent of explosive special grease, 32.5 to 80 percent of special agent and 5 to 15 percent of surface-active agent. The process comprises the following steps that the nitrate oxidizing agent and water are mixed to form water phase so as to be made into expanded ammonium nitrate through crystallization and expansion; the explosive special grease and the special agent are fully molten and mixed, and then added with the surface-active agent to be mixed so as to form the composite oil phase; then, the expanded ammonium nitrate, the composite oil phase obtained in the previous steps and the dry combustible agent are mixed evenly, thereby obtaining the ammonium nitrate explosive. The process not only forms a tight firm oil film coating on the surface of the expanded ammonium nitrate, but also turns the hydrophilic surface of an expanded ammonium nitrate solid into a hydrophobic surface, thereby obtaining the effects of no moisture absorption in a humid environment and slower moisture absorption in a watered environment; moreover, the waterproof rock expanded ammonium nitrate explosive is nonlumping and has excellent free-running property.

Description

technical field

[0001] The invention belongs to the technical field of explosives and its manufacture, in particular to a waterproof rock-expanded ammonium nitrate explosive and a preparation process. Background technique

[0002] Rock expanded ammonium nitrate explosive is a kind of light, porous and bulky flaky explosive produced by applying special compound active agent, that is, expanding agent and vacuum forced crystallization process, according to the "hot spot" theory of explosive detonation and modern surface activity theory. Ammonium nitrate, this kind of ammonium nitrate contains many micro-bubbles and has a larger specific surface area. Compared with ordinary ammonium nitrate, its detonation sensitivity is greatly improved, and it has self-sensitization characteristics. It is currently one of the products with better performance and wider application. Theoretically, its surface is coated with an extremely thin layer of "surfactant" hydrophobic film, which can redu...

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