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Method for sensitizing microporous smokeless firework explosive

A technology of micropores and fireworks, which is applied to the composition of inorganic oxyhalogen salt explosives, explosives, nitrated explosive components, etc., and can solve problems such as low production efficiency, residual explosives, and gaps in ignition performance

Inactive Publication Date: 2012-06-06
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The main method of using the scrapped military smokeless powder as propellant for fireworks is to crush the waste powder. If the particle size of the crushed powder is too large, it is easy to produce residual powder, and the use effect is not ideal. However, the waste powder can be crushed to Under 100 mesh, it is relatively difficult and the production efficiency is also low. In addition, there are defects such as insufficient burning speed under normal pressure and low pressure conditions, which cannot completely replace black powder. In many cases, it is mixed with black powder, which cannot completely solve the problem of smoke. Thick question
[0003] Solvent method is used to completely dissolve the waste gunpowder and then reshape it to prepare smokeless fireworks with a micropore structure. The burning speed and fire transmission speed are greatly improved, but because there are almost no solid phase components in the combustion product, it is compatible with black powder. Compared with the ignition performance, there is still a certain gap

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]Single-base waste powder with a nitrocellulose content greater than 85% is used as the raw material drug. After preliminary crushing, the diameter of the particle is controlled to be no more than 3mm. The wet drug granules with water and water twice the mass of the granules are added to the molding equipment. Add ethyl acetate solvent 10 times the mass of the pellets under stirring, stir and dissolve at 45°C-50°C for 30-60min, then continuously add tap water to the system within 30min, and emulsify under stirring Soaking operation, the amount of water added is 6 times the mass of the drug granules, after adding water, continue to stir at a temperature of 50-60°C for 30 minutes, and when the temperature of the system is adjusted to 65°C-68°C, add 5 times the mass of the raw material drug containing The dispersant aqueous solution is added into the system to disperse into balls, gelatin is used as the dispersant, and the amount of gelatin added is 0.5% of the total mass of ...

Embodiment 2

[0029] Single-base waste powder with a nitrocellulose content greater than 85% is used as the raw material drug. After preliminary crushing, the diameter of the particle is controlled to be no more than 3mm. The wet drug granules with water and water twice the mass of the granules are added to the molding equipment. Add ethyl acetate solvent 10 times the mass of the pellets under stirring, stir and dissolve at 45°C-50°C for 30-60min, then continuously add tap water to the system within 30min, and emulsify under stirring Soaking operation, the amount of water added is 6 times the mass of the drug granules, after adding water, continue to stir at a temperature of 50-60°C for 30 minutes, and when the temperature of the system is adjusted to 65°C-68°C, add 5 times the mass of the raw material drug containing The dispersant aqueous solution is added into the system to disperse into balls, gelatin is used as the dispersant, and the amount of gelatin added is 0.5% of the total mass of...

Embodiment 3-9

[0031] Using the same process as in Example 1, using single-base waste gunpowder with a nitrocellulose content greater than 85% as a raw material for sample preparation, only reducing the amount of solvent added to 6 times the mass of the pellets, and adding The amount of water is reduced to 4 times the mass of the pellets. Use different sensitizers for sensitization treatment, the addition ratio is 5%, and the addition method is to make different sensitizers into aqueous solutions, compare the fire transmission speed of the obtained samples, and compare them with unsensitized samples, test The results are shown in the table below (test temperature 25°C). Finally, the bulk density of the obtained sample is 0.24g.cm -3 , the particle size is mainly concentrated in 300-2000um, and after drying, the 20-40 mesh part is screened out for burning rate test.

[0032] Sensitizer type

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Abstract

The invention discloses a method for sensitizing microporous smokeless firework explosive, which comprises the following steps of: dissolving scrapped military smokeless explosive containing nitrated cellulose into a solvent to form macromolecular sol, emulsifying and foaming the sol to form paint emulsion, dispersing the paint emulsion into a non-solvent medium under stirring action to form balls, then driving the solvent to obtain explosive particles suspended in the solution and provided with micropores, separating the explosive particles suspended in the solution and provided with micropores, sensitizing the explosive particles separated from the solution of the suspended explosive particles and provided with micropores, and drying the explosive particles to obtain an explosive particle finished product, wherein the sensitizing mode is to add a sensitizing agent into the explosive particles separated from the solution of the suspended explosive particles in a form of aqueous solution or solid. The sensitizing process improves the fire transfer speed of the explosive particles and improves the ignition performance thereof, and the fire transfer speed of the explosive particles is improved by 10 to 200 percent under a normal pressure condition.

Description

technical field [0001] The invention belongs to the technology of fireworks propellant and fireworks shell opening, in particular to a method for sensitizing micro-pore smokeless fireworks. Background technique [0002] The main method of using scrapped military smokeless powder as propellant for fireworks is to crush the waste powder. If the size of the powder after crushing is too large, it is easy to produce residual powder, and the use effect is not ideal. However, the waste powder can be crushed to Under 100 mesh, it is relatively difficult and the production efficiency is low. In addition, there are defects such as insufficient burning speed under normal pressure and low pressure conditions, which cannot completely replace black powder. In many cases, it is mixed with black powder, which cannot completely solve the problem of smoke. Thick question. [0003] Solvent method is used to completely dissolve the waste gunpowder and then reshape it to prepare smokeless firew...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B25/18C06B25/28C06B29/00C06B31/00
Inventor 潘仁明蔺向阳郑文芳李生有崔敬学钱涛
Owner NANJING UNIV OF SCI & TECH
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