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Modularized bud-opening powder for display shell and preparation method thereof

A modular and firework bomb technology, applied in the direction of nitration explosive components, explosives, offensive equipment, etc., can solve the safety hazards of fireworks charging, affect the budding shape or ornamental effect of fireworks shells, and charge difficulties, etc., to solve the problem of burning Insufficient or drug residue problem, improvement of ornamental effect and environmental performance, improvement of process safety effect

Active Publication Date: 2011-10-19
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of budding medicine has been used for hundreds of years. Due to the wide source of raw materials, it is relatively easy to make, but it also brings about the problem of unstable material properties.
In addition, during the budding process of the fireworks shells, when the filling materials such as black powder and rice husk are burned, a large amount of smoke will be generated, which will affect the shape or ornamental effect of the shells.
[0003] Using smokeless fireworks with a micro-pore structure as the bud-opening drug, the bud-opening effect is not ideal. The main problem is that its ignition performance is not ideal. When the charging conditions are not suitable, the firing rate of bright beads is low.
In the preparation process of granular microporous fireworks, the above problems cannot be completely solved by adding sensitizers or ignition performance enhancers.
In addition, when directly using granular microporous smokeless fireworks medicine as the budding medicine to make fireworks bombs, each round needs to be weighed in advance, and the particles are prone to static electricity and adhere to the surroundings of the fireworks shells, which brings great pressure to the charges. These problems have brought about safety hazards in the production process of fireworks charges
In addition, when the charging conditions of granular microporous smokeless fireworks are not suitable, there will be a problem of residues in the firing process, which is unfavorable to the safety and environmental protection of the firing process.

Method used

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  • Modularized bud-opening powder for display shell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Granular microporous fireworks medicine is prepared by using single-base waste powder containing 97.0% nitrocellulose and 1.0% diphenylamine (stabilizer). After preliminary crushing, the particle diameter is controlled to be no more than 3mm, and the wet powder with water is added to the molding equipment. In the state of stirring, add ethyl acetate solvent 10 times the mass of the pellets, stir and dissolve at 45°C-50°C for 30-60min, and then continuously add 0.5% potassium nitrate aqueous solution to the system, potassium nitrate as a sensitive Carry out emulsification and foaming operation under stirring state, continue to add the aqueous solution of 0.5% potassium nitrate in this step, the amount of the potassium nitrate aqueous solution that adds is 6 times of grain quality, then in 50- Continue to stir at 60°C for 30min to 60min. When the system temperature is adjusted to 65°C-68°C, add an aqueous solution containing dispersant and 0.5% potassium nitrate 6 times th...

Embodiment 2

[0037] Granular micro-pore fireworks were prepared from raw materials with nitrocellulose content of 99% and diphenylamine (stabilizer) content of 0.5%. 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 0.5% potassium nitrate aqueous solution to the system, potassium nitrate is used as a sensitizer Or ignition performance enhancer; carry out emulsification and foaming operation under stirring state, continue to add 0.5% potassium nitrate aqueous solution in this step, the amount of potassium nitrate aqueous solution added is 6 times of the mass of the pellets, and then in 50-60 ℃ Continue to stir at high temperature for 30min to 60min. When the system temperature is adjusted to 65°C-68°C, add 6 times the mass of the raw material drug containing dispersant and 0.5% potassium nitrate aqueous solution into the system to disperse into balls, gelatin as dispersant , the amount of dispersant ...

Embodiment 3

[0042] Granular microporous fireworks were prepared by using retired double-base drug containing 65% nitrocellulose, 30% nitroglycerin (plasticizer), and 2.0% 2-nitrodiphenylamine (stabilizer). Add ethyl acetate solvent 8 times the mass of the pellets under stirring, stir and dissolve at 45°C-50°C for 30-60min, then continuously add 0.1% potassium nitrate aqueous solution to the system, potassium nitrate as ignition performance Strengthening agent: carry out emulsification and foaming operation under agitation, continue to add 0.1% potassium nitrate aqueous solution in this step, the amount of potassium nitrate aqueous solution added is 6 times of the mass of the medicine grain, and then continue at a temperature of 50-60°C Stir for 30min to 60min, adjust the system temperature to 65°C-68°C, add 6 times the mass of the raw material drug containing dispersant and 0.1% potassium nitrate aqueous solution into the system to disperse into balls, use bone glue as dispersant, disperse...

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Abstract

The invention discloses modularized bud-opening powder for a display shell. The bud-opening powder includes a nitro-cotton component. The internal part of the bud-opening powder has a large number of micropores which are blocky in shapes. The sizes and the shapes of the micropores are determined according to the diameter and the shape of the display shell and a setting shape needing to be reached. The method for preparing the modularized bud-opening powder for the display shell comprises the following steps of: preparing firework powder with granular micropores firstly; and then, bonding and forming the firework powder with the granular micropores to prepare a powder block matched with the display shell, wherein the process of bonding and forming the modularized powder comprises the following steps of: mixing a binder for forming, an ignitability reinforcing agent and the firework powder with the granular micropores; then, preparing the powder block in a specific shape from the mixed materials; and finally, drying the powder block. According to the modularized bud-opening powder, the problem of insufficient combustion of the bud-opening powder or powder residuals can be solved; the firing rate of bright beads is improved; the smoke generated in the bud-opening process is greatly reduced; and the process safety of firework products in the production process can be improved.

Description

technical field [0001] The invention belongs to the bud-opening technology of fireworks bombs, in particular to a modular bud-opening medicine for fireworks bombs and a preparation method thereof. Background technique [0002] The traditional fireworks popping explosives are made of black powder as the main explosive material. Usually, black powder is mixed with a small amount of binder, and a large amount of low-density filling materials such as rice husk or cottonseed husk are added. The black powder sticks to the surface of the granulated filler and dries to become a granulated budding agent. This kind of budding medicine has been used for hundreds of years. Due to the wide source of raw materials, it is relatively easy to make, but it also brings about the problem of unstable material properties. In addition, during the bud opening process of the fireworks shells, when the filling materials such as black powder and rice husk burn, a large amount of smoke will be produce...

Claims

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Application Information

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IPC IPC(8): C06B25/20
Inventor 潘仁明蔺向阳李生有
Owner NANJING UNIV OF SCI & TECH
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