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Waterproof type rock swelling ammonium nitrate explosive and preparation technique thereof

A technology of rock-expanded ammonium nitrate and waterproof type, which is applied in the direction of explosives, etc. It can solve the problems of inability to apply waterproof expanded ammonium nitrate explosive formula and technology, poor coating effect of waterproof materials, and water-proof discount, so as to improve charge efficiency. , easy to charge and pack, and reduce labor costs

Inactive Publication Date: 2009-01-21
ZHEJIANG YONGLIAN CIVIL EXPLOSIVE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some units also proposed to add part of the waterproof material to the water phase, and cooperate with the expanding agent to form expanded ammonium nitrate with better coating properties during the expansion process. This expanded ammonium nitrate has certain water resistance, but it is formed after crushing. A large number of new sections and the waterproof materials added in the later period have poor coating effects, and their waterproofness is greatly reduced. At the same time, this process has caused new safety problems. Therefore, there is currently no waterproof expanded ammonium nitrate explosive formula that can be applied to production in China. technology

Method used

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  • Waterproof type rock swelling ammonium nitrate explosive and preparation technique thereof

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Effect test

Embodiment 1

[0024] Add 9.6% hot water to the water phase melting tank, then add 90.4% ammonium nitrate, heat up to make it fully dissolve and reach the process temperature of 125°C to 135°C, expand and crystallize the prepared solution to obtain expanded ammonium nitrate for use . Dry the wood powder for later use. Take 62.5% special grease for explosives and 32.5% vaseline, heat and fully melt and mix, when the temperature reaches 80°C, add 5% stearylamine, melt and mix, and heat to 120°C to obtain a composite oil phase. According to the ratio of 92% expanded ammonium nitrate, 4% wood flour and 4% composite oil phase, the three components are measured separately, and then the three materials are mixed continuously. The mixing temperature is 50 ° C, and the waterproof rock expanded ammonium nitrate explosive is produced continuously. . Explosive performance and waterproof performance: the detonation distance is 4cm3 / 3, the detonation velocity is 3571m / s, and the intensity is 15.62mm. A...

Embodiment 2

[0026] Add 9.6% hot water to the water phase melting tank, then add 90.4% ammonium nitrate, heat up to make it fully dissolve and reach the process temperature of 125°C to 135°C, expand and crystallize the prepared solution to obtain expanded ammonium nitrate for use . Dry the coal powder for later use. Take 10% special grease for explosives and 85% vaseline, heat and fully melt and mix, when the temperature reaches 80°C, add 5% polyacrylamide, melt and mix, and heat up to 110°C to obtain a composite oil phase. According to the ratio of 94% expanded ammonium nitrate, 3% wood flour and 3% composite oil phase, the three components are measured separately, and then the three materials are mixed continuously. The mixing temperature is 90°C, and the waterproof rock expanded ammonium nitrate explosive is produced continuously. . Explosive performance and waterproof performance: the detonation distance is 5cm3 / 3, the detonation velocity is 3906m / s, and the intensity is 15.34mm. Af...

Embodiment 3

[0028] Add 9.6% hot water to the water phase melting tank, then add 90.4% ammonium nitrate, heat up to make it fully dissolve and reach the process temperature of 125°C to 135°C, expand and crystallize the prepared solution to obtain expanded ammonium nitrate for use . Dry the wood powder for later use. Take 62.5% special grease for explosives, 7.5% engine oil and 25% petrolatum and heat to fully melt and mix. When the temperature reaches 100°C, add 5% stearylamine to melt and mix and heat to 120°C to obtain a composite oil phase. The three components of 91% expanded ammonium nitrate, 4.5% wood powder and 4.5% composite oil phase are mixed continuously, the mixing temperature is 80°C, and the waterproof rock expanded ammonium nitrate explosive is obtained by continuous discharge. Explosive performance and waterproof performance: the detonation distance is 4cm3 / 3, the detonation velocity is 3401m / s, and the intensity is 14.4mm. After the drug roll is immersed in water for 30c...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B31/28
Inventor 黄河新严水金谢建畏陈庆军诸葛斌何勇
Owner ZHEJIANG YONGLIAN CIVIL EXPLOSIVE MATERIALS
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