A kind of micro-smoke propellant compound composition and its application

Abstract

The invention discloses a micro-smoke gunpowder compound composition and its application. The low-smoke gunpowder has a raw material ratio of 1-25% of urea, 40-70% of oxidant, and 20-40% of combustibles in terms of mass percentage. , modified additive 1‑10%, disintegrant 1‑10%. The micro-smoke powder compound composition can be applied to the pyrotechnic powder for firecrackers, the pyrotechnic powder for fuses, and can also be used as bud opening powder and propellant powder for fireworks. It has the characteristics of less usage, simple chemical structure of raw materials, easy complete combustion, high ignition temperature, low explosion temperature, large gas production, and less solid residue. It can effectively reduce the pollution of atmospheric solid particles during discharge.

Description

technical field [0001] The invention belongs to the technical field of fireworks and firecrackers, and relates to a compound composition and application thereof, in particular to a compound composition of micro pyrotechnic powder and application thereof. Background technique [0002] In my country, fireworks and firecrackers have a development history of more than a thousand years. They are an important part of traditional cultural activities of various ethnic groups. Now they have gradually become a new business card for Chinese traditional culture to go to the world. As my country pays more and more attention to the protection of traditional culture involving fireworks and firecrackers, a number of projects have entered the national list of intangible cultural heritage in my country. The healthy and stable development of the fireworks and firecrackers industry is an important support for the rapid development of Chinese traditional culture to the world. [0003] The bigge...

AI Technical Summary

Problems solved by technology

[0006] 2. The aluminum powder in the traditional pyrotechnic powder is prone to redox reaction with air in a humid environment, generating hydrogen and generating heat, which can easily lead to spontaneous combustion of the pyrotechnic powder

[0007] 3. During the combustion and explosion of traditional pyrotechnics, the metal salts and incompletely burned reactants produced by the shock wave will produce a large amount of fine particles, causing PM2.5 and PM10 pollution

[0008] 4. Traditional pyrotechnics do not contain hydrogen or have low hydrogen content. Compared with substances with the same mass and high hydrogen content, they have lower detonation heat and less gas generation during combustion, and cannot effectively generate water molecules. Active Dust Suppression

[0009] 5. Charcoal is often used in traditional pyrotechnic formulations. Its burning speed is slow, its detonation heat is not high, and it is difficult to completely react during the combustion process. Therefore, a large amount of solid particles will be produced after combustion, and its main component is elemental carbon.

[0010] 6. The combustion of traditional pyrotechnics produces a large amount of sulfur dioxide and nitrogen oxides, which is one of the reasons for the formation of acid rain

[0014] 3. The existing micro-smoke gunpowder uses a large number of single-base powders, but the production and sales of single-base powders are strictly controlled, the price is high, and the output is small, and the supply is often in short supply.

[0015] 4. In the Chinese invention patent CN108586175A, the high-viscosity colloidal explosive made of water, sodium nitrate, urea, ammonium nitrate and other materials needs an electric detonator to detonate during use, and the water content is very high, so it cannot be used as gunpowder commonly used in fireworks and firecrackers. The fuse is ignited, and the discharge effect cannot reach the current level

[0016] 5. Too much ammonium nitrate is used as the oxidant in the pyrotechnic powder, and when it burns, it will produce a high concentration of toxic gas

[0017] 6. The synthesis of hydrazine nickel nitrate and other compounds as detonators requires strong professional chemical knowledge and synthesis equipment, and a large amount of use will greatly increase the production and safety costs of fireworks and firecracker enterprises

[0018] 7. More bulking agents, flame suppressants, etc. are added to the existing micro-smoke powder. They do not participate in combustion and explosion reactions, and most of them are water-insoluble metal salts. After being broken by shock waves, a large number of solid particles will also be formed.

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