Combination-membrane-coated granulous ammonium-nitrate-fuel-oil explosive mixture and manufacture method thereof

Abstract

The invention belongs to the field of a civil explosive, and provides a combination-membrane-coated granulous ammonium-nitrate-fuel-oil explosive mixture and a manufacture method of the explosive mixture. The explosive mixture comprises the following components, by mass percentage: 70-95% of porous granulous ammonium nitrate, 2-6% of YMF-type composite oil, 1-3% of a YMB-type coating agent, 2-10% of a YMFJ-type anti-caking agent, and 1-12% of a YMBB-type surface coating agent. The manufacture method comprises: pre-treating and pre-heating raw materials; weighing the raw materials according to the formula above; and adding the YMF-type composite oil, the YMB-type coating agent, the YMFJ-type anti-caking agent, and the YMBB-type surface coating agent into porous granulous ammonium nitrate for uniform mixing. The explosive mixture has explosion performance significantly better than that of an ordinary porous ammonium-nitrate-fuel-oil explosive mixture, has a long storage period, and can be produced as a commodity. The explosive mixture is good in free-running property, can be packed in bulk for use, and can be easily charged in a blast hole through a pressure charging machine. The explosive mixture can be easily serialized and widely used.

Description

technical field [0001] The invention belongs to the field of civil explosives, in particular to the field of porous granular ammonium oil explosives. Background technique [0002] Porous granular ammonium oil explosive (ANFO) is a mixture of porous granular ammonium nitrate and light diesel oil. It was once called "the simplest explosive" and can be mixed on the engineering site. Because of its simplicity and cheapness, it has been used in mining at home and abroad for more than half a century. However, its explosive performance is not high, and it is unstable; a week after it is made, its performance declines significantly. Moisture resistance is poor, let alone water resistance. Use guarantee period (storage period) is only 1 month. Therefore, it is usually only used in open pit dry holes, and only in underground mining and underground engineering when conditions are suitable. [0003] In order to overcome the shortcomings and limitations of this kind of explosive, in ...

AI Technical Summary

Problems solved by technology

But for this kind of explosive, the viscosity on the surface of the particles will drop significantly after a few days, so it is only suitable for self-production and self-use

[0008] The above situation shows that the previous technological advances did not make the porous granular ammonium oil explosives obtain a more comprehensive and significant improvement in terms of explosive performance, moisture resistance, storage period, and wide applicability under different engineering conditions. Its performance and application The effect is often one rises and the other falls