Bulked ammonium nitrate explosive with low explosion speed and its prepaing process

A technology of expanded ammonium nitrate explosives and low detonation velocity, which is applied in the direction of explosives, non-explosive/non-thermal agent components, offensive equipment, etc., and can solve problems such as high product cost, increased unsafety, and environmental pollution, and is beneficial to Safe production, excellent explosive performance, and good uniformity of explosion transmission

Inactive Publication Date: 2002-12-25
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low detonation velocity explosives of above-mentioned document report, there is following defect: (1) all contain strong explosives RDX, TNT, PETN etc., not only make product cost remain high, and have increased production, storage, transportation, unsafe in the use process (2) Using heavy metal oxides as diluents will cause environmental pollution after explosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1. Taking the industrial production of 100kg low detonation velocity expanded ammonium nitrate explosive as an example, the selected components and mass ratio are 82% ammonium nitrate, 3.5% compound oil, 3.5% wood flour, 11% perlite, and 0.15% stearylamine acetate (extra), wherein the components and mass proportioning of compound oil are: diesel oil 50%, paraffin 50%. According to the above-mentioned components and formula, the implementation steps are as follows: the first step: take 82kg of ammonium nitrate, add 8.2kg of water, 0.123kg of octadecylamine acetate, heat to dissolve and raise the temperature to 130°C; the second step: Inhale the solution in the first step into a vacuum dryer with a vacuum degree of -0.085MPa~-0.098MPa at a suction speed of 100kg / min, carry out vacuum drying, remove water, and obtain expanded ammonium nitrate; the third step: the expanded ammonium nitrate Mix ammonium nitrate with compound oil, wood flour, and perlite in a wheel m...

Embodiment 2

[0009] Example 2. Still taking the industrial production of 100kg low detonation velocity expanded ammonium nitrate explosive as an example, the selected components and mass proportioning are: 83% of ammonium nitrate, 0.1% of sodium lauryl sulfate (additional), 4% of wood powder, 3% of compound oil, 10% of hollow glass microspheres, wherein the composite oil phase material is 60% of diesel oil and 40% of paraffin. The product can be obtained by operating according to the implementation steps described in Example 1. After testing, the performance of the product is: charge diameter 32mm, charge density 0.65k / cm 3 ~0.68k / cm 3 , the detonation velocity is 2650m / s, the intensity is 11.8mm, and the detonation distance is 4cm.

Embodiment 3

[0010] Example 3. Still taking the industrial production of 100kg low detonation velocity expanded ammonium nitrate explosive as an example, the selected components and mass ratio are: 82% ammonium nitrate, 0.12% stearyl ammonium nitrate, 3.5% compound oil, 1% wood flour, perlite 13.5%. The product can be obtained by operating according to the implementation steps described in Example 1. The performance of the tested product is: when the charge diameter is 32mm, the charge density is 0.65k / cm 3 ~0.68g / cm 3 , the detonation velocity is 2300m / s, the intensity is 11.1mm, and the detonation distance is 4cm.

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Abstract

A puffed ammonium nitrate explosive with low exploding speed is prepared from ammonium nitrate, surfactant, composite oil, wood powder, and diluent through dissolving ammonium nitrate and surfactant in water, vacuum drying at 110-140 deg.C and -0.085--0.098 MPa vacuity for 5-20 min, mixing with others and cooling. Its advantages are high safety and performance, uniform explosion transmission and low cost.

Description

1. Technical field [0001] The invention relates to a low detonation velocity explosive and a preparation method thereof, in particular to a low detonation velocity expanded ammonium nitrate explosive and a preparation method thereof. 2. Background technology [0002] Low detonation velocity explosives refer to a class of explosives with a lower limit detonation velocity, which are widely used in the fields of metal explosion welding (composite), coupling charges for smooth blasting, etc. The preparation method of relevant low detonation velocity explosives has been reported both at home and abroad, such as document 1, Ricard.Low Detonation Velocity Explosive Composition.USP, 4490196,1984; Polymer plastics are used as a binder. During the manufacturing process, bubbles are generated by air blowing or chemical foaming. After curing, foam explosives with low detonation velocity are obtained. Document 2, Lu Chunxu etc. Industrial low detonation velocity mixed explosives. Chines...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B23/00C06B31/28C06B31/30
Inventor 吕春绪叶志文刘祖亮陆明陈天云王依林
Owner NANJING UNIV OF SCI & TECH
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