Powdered ammonium nitrate-fuel oil explosive and production process thereof

Abstract

The invention discloses a powdered ammonium nitrate-fuel oil explosive and production process, wherein the constituents include (by weight ratio) ammonium nitrate 90-96%, composite oil phase 2.5-9%, cementing agent 0.1-1%, cross linking agent 0.05-0.5%, and the preparation process comprises the following steps, charging water into ammonium nitrate, dissolving and elevating temperature to 110-140 deg C, heating the compound oil phase to elevate the temperature to 85-120 deg. C, charging the cementing agent into dissolved ammonium nitrate solution, stirring at low speed, dispersing the compound oil phase into ammonium nitrate solution, charging cross linking agent, forming viscous slurry form mixture, carrying out vacuum drying, cooling down to below 40 deg C and packaging.

Description

technical field [0001] The invention relates to an ammonium oil explosive and a preparation method thereof, in particular to a powdered ammonium oil explosive and a preparation method thereof. It can be used by explosive manufacturers in the civil explosive industry to produce powdered ammonium oil explosives, which can be widely used in engineering blasting. Background technique [0002] Powdered ammonium nitrate explosives are currently the most widely used industrial explosives, mainly including ammonium ladder explosives and ammonium oil explosives. Generally speaking, ammonium-tide explosives contain strong explosive sensitizer TNT, and its explosive performance is better than ammonium oil explosives, but TNT is a toxic component, harmful to human body, and the cost is high. Ammonium oil explosives are low in cost and simple in production process, but have poor explosive performance, are prone to oil leakage and deterioration, and have poor storage performance. Both o...

AI Technical Summary

Problems solved by technology

Generally speaking, ammonium-tide explosives contain a strong explosive sensitizer TNT, and its explosive performance is better than ammonium oil explosives, but TNT is a toxic component, harmful to the human body, and the cost is high

Ammonium oil explosives have low cost and simple production process, but their explosive performance is poor, and they are prone to oil leakage and deterioration, and their storage performance is poor

Both of the above are easy to absorb moisture and agglomerate, have poor water resistance, and due to low detonation velocity, it is difficult to meet the requirements of hard rock blasting engineering, and most of the production processes are intermittent processes, which do not meet the requirements of the development of industrial explosives

[0003] Ordinary powdered ammonium ladder oil or ammonium oil explosives and modified ammonium oil explosives mostly use the mixture of solid ammonium nitrate and liquid oil phase. This mixing method is difficult to disperse the oxidizer and combustible agent evenly and fully contact them. Therefore, the prepared The detonation reaction of explosives is completely limited, and it is difficult to improve the explosive performance

[0004] Chinese patent CN91107051.6 discloses an expanded ammonium nitrate explosive. This explosive has the disadvantages of low density, low power per unit volume and poor water resistance. Its production process consists of an expanding process and a mixing process. It is a mixture of expanded ammonium nitrate and composite oil phase, solid phase and liquid phase of wood powder, and the detonation performance is still not high

For this reason, Chinese patent CN1517325A discloses a kind of improved expanded ammonium nitrate again, and its process method is to first mix ammonium nitrate aqueous solution and composite oil phase and expand again, make oxidizer and combustible agent mix between liquid phase and liquid phase, improve contact area, thereby improving the detonation performance, but this method has several shortcomings: first, the water phase and the oil phase require high-speed stirring, and second, the oil phase and the water phase are quickly separated during the puffing process, and finally the oxidizer and the combustible agent are not dispersed. Uniformity, also affects detonation performance