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Powdery expanded ammonium nitrate explosive and preparation method for same

A technology of expanded ammonium nitrate explosive and expanded ammonium nitrate, which is applied in the field of low-cost, high-performance, environmentally friendly powder expanded ammonium urea explosive and its preparation, and can solve problems such as unfavorable cleaning and safe production, difficulty in mixing uniformly, and high cost of raw materials , to achieve the effect of clean and safe production process, small workshop area and few production personnel

Inactive Publication Date: 2014-11-26
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of diesel oil, engine oil and composite wax in the composite oil phase has high cost of raw materials, difficulty in mixing the oil phase material and ammonium nitrate / ammonium nitrate solution uniformly, oil phase preparation and quantitative devices are required in the production process, and oily substances are present in the production process. Wastewater and waste gas generation
The existence of these deficiencies is not conducive to clean and safe production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Taking industrial production of 100kg powdered ammonium urea explosive as an example, the selected components and mass ratio are: 85% ammonium nitrate, 10% urea, 4% wood flour, 1% anti-caking and water-repellent agent, of which anti-caking and The components and mass ratio of the water repellent are: paraffin 35%, stearic acid 35%, and stearylamine acetate 30%.

[0028] According to the above components and ratio, the implementation steps are as follows:

[0029] The first step: weigh 85.0kg of ammonium nitrate, 10.0kg of urea, add 8.0kg of water, heat to make the solution, and raise the temperature to 120°C.

[0030] Step 2: Weigh 0.35kg of paraffin wax, 0.35kg of stearic acid and 0.3kg of octadecylamine acetate, and add these anti-caking and water-repellent agents to the ammonium nitrate-urea mixed solution for melting.

[0031] The third step: Disperse the anti-caking and water-repellent agent in the ammonium nitrate aqueous solution to form an oil-in-water dispersion system...

Embodiment 2

[0036] Taking the industrial production of 100kg powdered ammonium urea explosive as an example, the selected components and mass ratio are: ammonium nitrate 86%, urea 12%, anti-caking and water-repellent agent 2%, of which anti-caking and water-repellent agent The components and the mass ratio are: paraffin 20%, stearic acid 20%, and stearylamine acetate 60%.

[0037] The product can be obtained by following the implementation steps described in Example 1. After testing, the performance of the product is: when the charge diameter is 32mm, the charge density is 0.92~0.95g / cm 3 When the detonation speed is 3870m / s, the intensity is 16.3mm, and the detonation distance is 9cm.

Embodiment 3

[0039] Still taking the industrial production of 100kg powdered ammonium urea explosive as an example, the selected components and mass ratio (%) are: 85% ammonium nitrate, 12% urea, 2% wood flour, 1% anti-caking and water-repellent agent, The composition and mass ratio of the anti-caking and water-repellent agent are: paraffin 40%, stearic acid 20%, and octadecylamine 40%.

[0040] The product can be obtained by following the implementation steps described in Example 1. The performance of the tested product is: when the charge diameter is 32mm, the charge density is 0.93~0.96g / cm 3 , Detonation distance is 9cm, detonation velocity is 4937m / s, fierceness is 16.7mm.

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Abstract

The invention discloses a powdery expanded ammonium nitrate explosive and a preparation method for the same. The explosive is prepared by mixing the following constituents in percentage by mass: 80-88% of ammonium nitrate, 5-20% of urea, 0-7% of wood flour, and 0-2% of anti-caking and anti-water agent. In the method, urea is used as a combustible agent for replacing an oil-phase material, so that the cost of the explosive is reduced, and the production process is clean and safe; and the oxidant ammonium nitrate is mixed with the combustible agent urea, and the anti-caking and anti-water agent in a liquid-state molecular state, so that the obtained explosive is excellent in explosion performance, wherein the explosion speed is 3500-4000 m / s (32 mm cartridge), the brisance is 14-18 mm, and the gap distance is 5-10 cm.

Description

Technical field [0001] The invention relates to an ammonium nitrate explosive and a preparation method thereof, in particular a low-cost, high-performance, environmentally-friendly powdered expanded ammonium urea explosive and a preparation method thereof. Background technique [0002] Ammonium nitrate explosive is a powdery explosive mechanical mixture. It is one of the most widely used industrial explosives, with medium power and certain sensitivity. It has hygroscopicity and caking properties, its sensitivity and power will be significantly reduced after being damp, and it will produce poisonous gas. Under the action of relatively weak external excitation energy (such as machinery, heat, electricity, light), the detonator can burn and can be quickly transformed into a detonation sensitive explosive. Pure ammonium nitrate is stable at room temperature and is not sensitive to impact, collision or friction. However, it will explode under high temperature, high pressure and the ...

Claims

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Application Information

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IPC IPC(8): C06B31/30C06B21/00
Inventor 陆明周新利
Owner NANJING UNIV OF SCI & TECH
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