Modified expanded ammonium nitrate explosive and preparation method thereof

Abstract

The invention relates to a modified expanded ammonium nitrate explosive and a preparation method thereof. The explosive comprises the following main components by weight percent: 85%-93% of ammonium nitrate, 3%-5% of composite oil phase, 0.05%-0.15% of expanding agent and 3%-5% of wood flour; and the explosive also contains 8.9% or less of ammonium nitrate expansion and crystallization modifier. In the production process, a defined amount of ammonium nitrate expansion and crystallization modifier is added to prepare the aqueous phase. Therefore, the aims of reducing the raw material cost and the processing energy consumption can be realized and the performances of the product are much higher than that of the prior art, especially the charge density and explosion velocity are obviously increased. the technical weaknesses of the prior art such as low charge density, poor explosion property and high charge cost can be solved.

Description

technical field [0001] The invention relates to a civil explosive and a preparation method thereof, in particular to a modified expanded ammonium nitrate explosive and a preparation method thereof. Background technique [0002] Expanded ammonium nitrate explosive is a powdery ammonium nitrate explosive. Due to its good explosive performance and no toxic and harmful components, TNT has become the main variety of powdered ammonium nitrate explosive in my country, accounting for more than 50%. The leading product of my country's industrial explosives. According to the actual production of the expanded explosive formula and process parameters announced in the book "Expanded Ammonium Nitrate Explosive" (ISBN 7-80132-865-5) edited by Lu Chunxu and others and the existing traditional expanded ammonium nitrate explosive, in its formula, except There are no other additives except ammonium nitrate, wood powder, oil phase and a small amount of ammonium nitrate expansion agent. The main...

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Problems solved by technology

[0003] The main defects of traditional expanded ammonium nitrate explosives are as follows: 1) the detonation sensitivity changes greatly, especially in high temperature and humid weather conditions, if measures are not taken in time, the expanded ammonium nitrate explosive produced will appear half-exploded or even fail to explode; 2 ) the charge density is small; 3) the explosive performance is reduced due to the small charge density; 4) the charge cost is high; 5) the drilling length increases, and the blasting cost increases; 6) the production process parameters are strict, such as water phase The temperature requirement is high, and the moisture content of the expansion nitrate should be small

The methods published in the above two patents and technical documents all improve the charge density and explosive performance of expanded ammonium nitrate explosives or powdered ammonium oil explosives to varying degrees, but what they have in common is that the three methods are all in high temperature environments Mixing the ammonium nitrate aqueous solution with the oil phase material in advance, and mixing the liquid oxidant with the liquid reductant in a high-temperature environment will undoubtedly increase the safety risk of explosive production, that is, the intrinsic safety of the process will be reduced; in addition, because the above methods have increased the unit price Higher raw materials, so the production cost of products manufactured by the above three methods is higher

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