Anti-freezing water gel explosive and preparation method thereof

A technology of freezing water and explosives, applied in explosives, non-explosive/non-thermal agent components, offensive equipment, etc., can solve the problems of affecting the plasticity of water-gel explosives, inability to detonate and propagate, and restrictions, and achieve enhanced initiation and propagation The effect of performance, low manufacturing cost, and cheap price

Active Publication Date: 2016-12-21
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since the water-gel explosive is a hydrogel system, as the temperature decreases, the free water in the system will freeze into ice, the solubility of ammonium nitrate will decrease sharply, and a large number of ammonium nitrate crystals will precipitate out, which not only affects the plasticity of the water-gel explosive, but also More importantly, it will affect the explosive performance of water-gel explosives, making it impossible to detonate and detonate
This restricts the use of water-gel explosives in blasting operations in northern regions and in some low-temperature environments.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The formula of antifreeze water gel explosive is as follows: 45% ammonium nitrate, 30% methylamine nitrate, 10.2% sodium nitrate, 10% water, 1% safflower powder, 0.07% sodium nitrite, 0.1% crosslinking agent, 0.5% urea, Antifreeze 3%, crystal modifier 0.13%. Wherein the antifreeze agent is composed of dimethyl sulfoxide and ethylene glycol with a mass ratio of 1:1, and the crystal form modifier is composed of sodium lauryl sulfate and cetyltrimethylammonium bromide with a mass ratio of 3:1 Than composition. All the above are percentages by mass.

[0024] Add ammonium nitrate, methylamine nitrate, sodium nitrate, squid powder and crystal form modifier into water, stir and dissolve at 80°C; adjust the temperature to 45°C, add urea, antifreeze and density regulator in turn; adjust the temperature to 40°C , add the cross-linking agent mixed by sodium tetraborate and potassium dichromate, keep it warm for 20 minutes, and get the antifreeze water gel explosive after being f...

Embodiment 2

[0027] The antifreeze water gel explosive formula is as follows: 48% ammonium nitrate, 30% methylamine nitrate, 10.2% sodium nitrate, 8% water, 1% scallop powder, 0.09% sodium nitrite, a mixture of sodium tetraborate and potassium dichromate 0.1%, 0.5% urea, 2% antifreeze, 0.11% crystal modifier. Wherein the antifreeze agent is composed of dimethyl sulfoxide and ethylene glycol with a mass ratio of 1:1, and the crystal form modifier is composed of sodium lauryl sulfate and cetyltrimethylammonium bromide with a mass ratio of 3:1 Than composition. All the above are percentages by mass.

[0028] The preparation method is the same as in Example 1. The antifreeze water-gel explosive density prepared by the present embodiment is 1.17g / cm 3 , put it in a 35mm-diameter PVC film charge roll to test its detonation velocity, the detonation velocity is 3248m / s at room temperature, the working capacity is 280mL, the detonation velocity is 3275m / s at -20°C, and the working capacity is 27...

Embodiment 3

[0030] The antifreeze water gel explosive formula is as follows: 48% ammonium nitrate, 30% methylamine nitrate, 10% sodium nitrate, 7% water, 1.2% kale powder, 0.1% sodium nitrite, a mixture of sodium tetraborate and potassium dichromate 0.1%, 0.5% urea, 3% antifreeze, 0.1% crystal modifier. Wherein the antifreeze agent is composed of dimethyl sulfoxide and ethylene glycol with a mass ratio of 1:1, and the crystal form modifier is composed of sodium lauryl sulfate and cetyltrimethylammonium bromide with a mass ratio of 3:1 Than composition. All the above are percentages by mass.

[0031] The preparation method is the same as in Example 1. The antifreeze water-gel explosive density prepared by the present embodiment is 1.08g / cm 3 , filled it in a 35mm-diameter PVC film charge roll to test its detonation velocity, the detonation velocity was 3165m / s at room temperature, the working capacity was 267mL, the detonation velocity was 3175m / s at -20°C, and the working capacity was ...

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Abstract

The invention discloses an anti-freezing water gel explosive, which is a gel-like substance maintaining good plasticity and good fluidity at a temperature as low as -20 DEG C, wherein ammonium nitrate, methylamine nitrate, sodium nitrate, water, sesbania powder and a cross-linking agent are adopted as raw materials and a density regulator, an anti-freezing agent and a crystal form modifier are added to obtain the gel-like substance, the anti-freezing agent comprises dimethyl sulfoxide and ethylene glycol, the crystal form modifier comprises sodium lauryl sulfate and hexadecane trimethylammonium bromide, and the density regulator is sodium nitrite. According to the present invention, the explosive performance of the anti-freezing water gel explosive is not affected at the ambient temperature as low as -20 DEG C, can normally perform the blasting operation, and is suitable for the blasting operation under the cold temperature condition in the north of China in winter.

Description

technical field [0001] The invention belongs to the technical field of energetic materials, and relates to a water gel explosive with antifreeze effect and a preparation method of the explosive. The water-gel explosive of the invention can be used in blasting operations in a low-temperature environment of -20°C to 0°C. Background technique [0002] The water-gel explosive is mainly composed of an aqueous solution of inorganic salts such as methylamine nitrate, ammonium nitrate, and sodium nitrate. Polysaccharides such as guer gum and squash gum are added to the aqueous solution as gelling agents, and the water-gel explosive is made by cross-linking technology. It is an industrial explosive whose components are uniformly and stably distributed in the gel system. This explosive has a uniform dispersion system in the molecular state, so the explosive reaction is complete, the blasting effect is excellent, the risk sensitivity is low, the safety is high, the stability is good, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B31/32C06B31/28C06B23/00
CPCC06B23/009C06B31/28C06B31/32
Inventor 王金英袁俊明刘玉存秦胜东王俊
Owner ZHONGBEI UNIV
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