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Method for safely preparing fireworks chemical by boiling granulating process

A pyrotechnic agent and process safety technology, applied in the direction of non-explosive/non-thermal agent components, explosives, offensive equipment, etc., can solve the problems of low efficiency, prone to explosion accidents, etc., and achieve no dust, simple addition and granulation process , Uniform effect of drug particles

Inactive Publication Date: 2011-10-05
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of traditional pyrotechnic agent granulation process, which is mainly manual operation, low efficiency, prone to explosion accidents, etc., to apply the boiling granulation method to the production of sensitive pyrotechnic agent, and to select suitable additives and viscose caking agent to reduce the temperature of the agent in the granulation process and realize a safe pyrotechnic agent boiling granulation process

Method used

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  • Method for safely preparing fireworks chemical by boiling granulating process
  • Method for safely preparing fireworks chemical by boiling granulating process
  • Method for safely preparing fireworks chemical by boiling granulating process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The formula of the pyrotechnic agent used is:

[0014]

[0015] (1) Weigh fine powdered sulfur powder, aluminum powder, magnesium-aluminum alloy powder, potassium nitrate, barium nitrate, potassium dichromate and cooked glutinous rice flour to 3.32kg, 0.676kg, 1.576kg, 0.732kg, 1.688kg respectively , 0.12kg and 0.2kg, and cooked glutinous rice flour is made into an aqueous solution with a mass fraction of 5%, and it is cooled to room temperature after heating and boiling;

[0016] (2) the original composition of the medicament weighed in 1) and potassium dichromate are mixed homogeneously by the airflow of 1m / s with velocity in the boiling granulator;

[0017] (3) Atomize the solution prepared in 1) at a rate of 100ml / min under a pressure of 0.2MPa and spray it into the granulator in 2), and at the same time, use an airflow rate of 1m / s and a temperature of 40°C to spray the atomized solution Prepare granular medicaments with fine powder medicaments, and obtain the ...

Embodiment 2

[0020] The formula of the pyrotechnic agent used is:

[0021]

[0022] (1) Weigh fine powdered sulfur powder, aluminum powder, magnesium-aluminum alloy powder, potassium nitrate, barium nitrate, potassium dichromate and cooked glutinous rice flour to 3.32kg, 0.676kg, 1.576kg, 0.732kg, 1.688kg respectively , 0.16kg and 0.24kg, and cooked glutinous rice flour is made into an aqueous solution with a mass fraction of 6%, which is cooled to room temperature after heating and boiling;

[0023] (2) the original composition of the medicament weighed in 1) and Potassium Dichromate are uniformly mixed with a velocity of 1.5m / s in the fluidized granulator;

[0024] (3) Atomize the solution prepared in 1) at a rate of 150ml / min under a pressure of 0.4MPa and spray it into the granulator in 2), and at the same time atomize the solution with a rate of 1.5m / s and a temperature of 50°C The solution and the fine powder medicine are prepared into granular medicine, and the target product is...

Embodiment 3

[0027] The formula of the pyrotechnic agent used is:

[0028]

[0029] (1) Weigh 1kg, 1kg, 1kg, 2.5kg, 2.5kg, 0.24kg of fine powdered sulfur powder, aluminum powder, magnesium aluminum alloy powder, potassium perchlorate, barium nitrate, potassium dichromate and cooked glutinous rice flour respectively and 0.32kg, and cooked glutinous rice flour is made into a mass fraction of 7% aqueous solution, heated and boiled and down to room temperature;

[0030] (2) the original composition of the medicament weighed in 1) and potassium dichromate are mixed homogeneously by the air flow of 2m / s in the boiling granulator;

[0031] (3) Atomize the solution prepared in 1) at a rate of 200ml / min under a pressure of 0.6MPa and spray it into the granulator in 2), and at the same time, use an airflow rate of 2m / s and a temperature of 60°C to spray the atomized solution Prepare granular medicaments with fine powder medicaments, and obtain the target product after drying.

[0032] There is ...

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Abstract

The invention relates to a method for safely preparing fireworks chemical by a boiling granulating process and belongs to the field of fireworks. The method disclosed by the invention comprises: placing raw materials weighed in a firework chemical mixing ratio in a closed container, adding potassium bichromate with a particle size of less than 80 meshes in an amount which is 1 to 3 percent based on the total mass of the chemical; mixing by an air flow at a rate of 1 to 2m / s till uniformness; atomizing and spraying aqueous solution of cooked sticky rice powder into the closed container, and preparing the atomized solution of adhesive and the chemical in the closed container into granular chemicals by using an air flow at a rate of 1 to 2m / s and at a temperature ranging from room temperature to 60 DEG C, and drying to obtain the firework product. In the invention, the dose of the additive is small, the addition and granulation processes are simple, and the blast accidents caused by heat accumulation is avoided. Meanwhile, the prepared chemical particles are uniform, the freerunning property is high, dust is prevented, and the explosion stability of the firework products made by the chemical particles is higher.

Description

technical field [0001] The invention relates to a method for safely preparing pyrotechnic agents by using a boiling granulation process, belonging to the field of fireworks and firecrackers. Background technique [0002] In order to improve the fluidity of the pyrotechnic agent and reduce the dust in the process of sieving and charging, it is necessary to granulate the fine powder agent. The traditional method is to manually sieve and mix the fine powder raw materials, and then add the binder to force the sieving method to complete the granulation. Explosion accidents are often caused by factors such as human misoperation and static electricity. As a kind of wet granulation, boiling granulation is a dry granulation technology obtained by effectively combining spray drying technology and fluidized bed technology. It is also called fluidized spray granulation and one-step granulation. The processes of granulation, granulation and drying are completed once in the same airtigh...

Claims

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Application Information

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IPC IPC(8): C06B23/00C06B33/14
Inventor 钱新明刘海营黄平刘振翼
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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