Modularized smokeless firework propellant and preparation method thereof

Abstract

The invention discloses a modularized smokeless firework propellant which contains nitrocotton, a large quantity of tiny holes are arranged in the propellant and have block shape, and the size and shape of the holes are determined according to the caliber and shape of a firework transmitting barrel. The preparation method of the modularized smokeless firework propellant comprises the following steps: firstly mixing organic bond with granular pore firework powder, secondly preparing block-shaped solid by using the mixed materials through mould pressing, and then expelling volatilizing components in the block-shaped medicine by stoving. Compared with the granular pore firework powder, the modularized smokeless firework propellant can thoroughly solve the problem of propellant residue of granular propellant feeding, and simplifies the operation of transmitting propellant feeding, so that the stability and consistency of an end firework product are better; and in addition, the modularizedsmokeless firework propellant also avoids the mechanical friction action among granules, and improves the safety of manufacture, transmission, and storage of the firework products.

Description

technical field

[0001] The invention belongs to the fireworks propellant technology, in particular to a modular smokeless fireworks propellant and a preparation method thereof. Background technique

[0002] Black powder is a traditional firework propellant that has been used for hundreds of years. Due to the large amount of smoke and polluting gases produced during the fireworks display process, research on environmentally friendly fireworks with less smoke has received attention in recent years. It is mainly developed in China. The current smokeless or micro-smoke propellants include powdered medicines prepared by pulverizing decommissioned single-base medicines and smokeless propellants with microporous structures obtained through spheroidization processes. Among them, the apparent burning rate of single base powder is quite different from that of black powder, and it is only used in some fireworks varieties that require lower burning speed. The smokeless propellant with ...

Examples

preparation example Construction

[0019] A method for preparing a modular smokeless fireworks propellant, which is to mix an organic binder with a granular micropore firework medicine, and then prepare the mixed material into a block solid by molding, and then use a drying method Drive off volatile components in bulk solids. Specifically include the following steps:

[0020] Step 1. Preparation of granular micro-pore fireworks medicine; dissolving, emulsifying and foaming the pre-prepared raw materials containing nitrocellulose, and forming into balls, followed by solvent removal, material separation, and finally drying to obtain granular micro-pores Fireworks medicine; when the material is dissolved and emulsified and foamed, an aqueous solution of an ignition performance enhancer is added; during the ball forming process, an aqueous solution containing an ignition performance enhancer and a dispersant is added as a dispersion medium; the ignition performance enhancement used in the above two processes The a...

Embodiment 1

[0034]Granular microporous fireworks were prepared from single-base waste propellant powder containing 97.0% nitrocellulose and 1.0% diphenylamine (stabilizer). The single-base waste gunpowder is preliminarily crushed, and the diameter of the particles is controlled to be no more than 3mm. The wet powder with water is added to the molding equipment, and ethyl acetate solvent 10 times the mass of the powder is added under stirring, and the temperature is 45°C-50°C Stir and dissolve under temperature for 30-60min, then continuously add the aqueous solution of 0.5% potassium nitrate (as ignition performance enhancer) to the system; Aqueous solution, the amount of potassium nitrate aqueous solution added is 6 times the mass of the drug granules, then continue to stir at a temperature of 50-60°C for 30min to 60min, and when the temperature of the system is adjusted to 65°C-68°C, add 6 times the mass of the raw drug The aqueous solution containing dispersant and 0.5% potassium nitra...

Embodiment 2

[0040] 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 as ignition performance Strengthening agent: carry out emulsification and foaming operation under agitation, 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 medicine grain, and then continue at a temperature of 50-60°C Stir for 30min to 60min, when the temperature of the system is adjusted to 65°C-68°C, add an aqueous solution containing dispersant and 0.5% potassium nitrate 6 times the mass of the raw material drug into the system to disperse into balls, gelatin is used as the dispersant, and the dispersant Th...

technical field

[0001] The invention belongs to the fireworks propellant technology, in particular to a modular smokeless fireworks propellant and a preparation method thereof. Background technique

[0002] Black powder is a traditional firework propellant that has been used for hundreds of years. Due to the large amount of smoke and polluting gases produced during the fireworks display process, research on environmentally friendly fireworks with less smoke has received attention in recent years. It is mainly developed in China. The current smokeless or micro-smoke propellants include powdered medicines prepared by pulverizing decommissioned single-base medicines and smokeless propellants with microporous structures obtained through spheroidization processes. Among them, the apparent burning rate of single base powder is quite different from that of black powder, and it is only used in some fireworks varieties that require lower burning speed. The smokeless propellant with ...

Examples

preparation example Construction

[0019] A method for preparing a modular smokeless fireworks propellant, which is to mix an organic binder with a granular micropore firework medicine, and then prepare the mixed material into a block solid by molding, and then use a drying method Drive off volatile components in bulk solids. Specifically include the following steps:

[0020] Step 1. Preparation of granular micro-pore fireworks medicine; dissolving, emulsifying and foaming the pre-prepared raw materials containing nitrocellulose, and forming into balls, followed by solvent removal, material separation, and finally drying to obtain granular micro-pores Fireworks medicine; when the material is dissolved and emulsified and foamed, an aqueous solution of an ignition performance enhancer is added; during the ball forming process, an aqueous solution containing an ignition performance enhancer and a dispersant is added as a dispersion medium; the ignition performance enhancement used in the above two processes The a...

Embodiment 1

[0034]Granular microporous fireworks were prepared from single-base waste propellant powder containing 97.0% nitrocellulose and 1.0% diphenylamine (stabilizer). The single-base waste gunpowder is preliminarily crushed, and the diameter of the particles is controlled to be no more than 3mm. The wet powder with water is added to the molding equipment, and ethyl acetate solvent 10 times the mass of the powder is added under stirring, and the temperature is 45°C-50°C Stir and dissolve under temperature for 30-60min, then continuously add the aqueous solution of 0.5% potassium nitrate (as ignition performance enhancer) to the system; Aqueous solution, the amount of potassium nitrate aqueous solution added is 6 times the mass of the drug granules, then continue to stir at a temperature of 50-60°C for 30min to 60min, and when the temperature of the system is adjusted to 65°C-68°C, add 6 times the mass of the raw drug The aqueous solution containing dispersant and 0.5% potassium nitra...

Embodiment 2

[0040] 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 as ignition performance Strengthening agent: carry out emulsification and foaming operation under agitation, 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 medicine grain, and then continue at a temperature of 50-60°C Stir for 30min to 60min, when the temperature of the system is adjusted to 65°C-68°C, add an aqueous solution containing dispersant and 0.5% potassium nitrate 6 times the mass of the raw material drug into the system to disperse into balls, gelatin is used as the dispersant, and the dispersant Th...

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