Core of water-resistant detonating cord and method for preparing core

Abstract

The invention discloses a core of a water-resistant detonating cord and a method for preparing the core. The core comprises, by weight, 15-20 parts of paraffin oil and petroleum ether saturated solution, 79.4-84.6 parts of pentaerythrite tetranitrate and 0.4-0.6 part of graphite powder. The method for preparing the core includes adding the paraffin oil and petroleum ether saturated solution and the graphite powder into the pentaerythrite tetranitrate according to raw material ratios; uniformly stirring and mixing the paraffin oil and petroleum ether saturated solution, the graphite powder andthe pentaerythrite tetranitrate with one another to obtain mixtures; granulating the mixtures; drying granules in water-bath drying tanks at the drying temperatures of 45-50 DEG C to obtain the core of the water-resistant detonating cord. The core and the method have the advantages that formulas for the core are improved, accordingly, the water resistance of the core can be integrally improved, the stability of the core can be reinforced, the storage life can be prolonged, and the explosion initiation and propagation performance of the core can be guaranteed; the water resistance and the stability of the core can be improved to the greatest extent by the aid of the method for preparing the core.

Description

technical field [0001] The invention relates to a detonating cord, in particular to a drug core of a water-resistant detonating cord and a preparation method thereof. Background technique [0002] Explosive is a substance that can burn or decompose very quickly, and can generate a large amount of heat and gas in a very short time. A typical explosive consists of explosives and corresponding detonating devices as a whole, and usually has a corresponding shell, which is Triggered by the heat or impact energy of the detonator, the explosive undergoes a rapid chemical reaction, ie complete combustion or decomposition. In a chemical reaction, a compound decomposes to produce a variety of gases. A large amount of energy is stored in the form of chemical bonds between the different atoms of the reactant (original chemical compound). When the compound molecule decomposes, the product (generated gas) may use it Some, but not all, of the energies of , form new bonds. Most of the "re...

AI Technical Summary

Problems solved by technology

For the detonating cord, the outer covering itself has a certain degree of waterproofness, so the key to the overall waterproofness of the detonating cord lies in the water resistance of its drug core, and the commonly used formulas and methods for optimizing this characteristic The obtained detonating cord core has certain water resistance, but there are still some deficiencies when used in extreme cases, which will cause safety hazards. Improve