Method for preparing thinned potassium chlorate used for fireworks and crackers

A technology of fireworks and potassium chlorate, applied in the direction of alkali metal composition, etc., can solve the problems of reducing mechanical sensitivity

Inactive Publication Date: 2009-12-16
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of literatures have shown that the introduction of ultrafine particles into the formulation of energetic materials can significantly reduce their mechanical sensitivity

Method used

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  • Method for preparing thinned potassium chlorate used for fireworks and crackers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 0.08mol / L potassium chlorate solution into the separatory funnel, and add non-solvent absolute ethanol into the water tank. Pressure pump 1 and pressure pump 2 (see figure 1 ) are connected to the separatory funnel and the water tank respectively. Adjust the flow of pressure pump 1 to 5L / h, and adjust the flow of pressure pump 2 to 40L / h. The potassium chlorate solution and the non-solvent absolute ethanol are respectively pressed into the nozzle by the pressure pump 1 and the pressure pump 2, and a buffer device is used to collect the suspension of fine potassium chlorate particles under the nozzle. The suspension flows out of the buffer device and then flows into the filter device. It is vacuum filtered by a vacuum pump, and then the filter cake is vacuum freeze-dried to obtain fine potassium chlorate with an average particle size of 800nm.

[0015] Fine potassium chlorate particles are used as an oxidant to prepare pyrotechnic agents with sulfur, nanometer alum...

Embodiment 2

[0018] Add 0.08mol / L potassium chlorate solution into the separatory funnel, and add non-solvent absolute ethanol into the water tank. Pressure pump 1 and pressure pump 2 ( figure 1 ) are connected to the separatory funnel and the water tank respectively. Adjust the flow of pressure pump 1 to 3L / h, and adjust the flow of pressure pump 2 to 40L / h. The potassium chlorate solution and the non-solvent absolute ethanol are respectively pressed into the nozzle by the pressure pump 1 and the pressure pump 2, and a buffer device is used to collect the suspension of fine potassium chlorate particles under the nozzle. The suspension flows out of the buffer device and then flows into the filter device. It is vacuum filtered by a vacuum pump, and then the filter cake is subjected to vacuum freeze-drying to obtain refined potassium chlorate with an average particle size of 350nm.

[0019] Fine potassium chlorate particles are used as an oxidant to prepare pyrotechnic agents with sulfur, ...

Embodiment 3

[0022] Add 0.08mol / L potassium chlorate solution into the separatory funnel, and add non-solvent absolute ethanol into the water tank. Pressure pump 1 and pressure pump 2 ( figure 1 ) are connected to the separatory funnel and the water tank respectively. Adjust the flow of pressure pump 1 to 2.5L / h, and adjust the flow of pressure pump 2 to 40L / h. The potassium chlorate solution and the non-solvent absolute ethanol are respectively pressed into the nozzle by the pressure pump 1 and the pressure pump 2, and a buffer device is used to collect the suspension of fine potassium chlorate particles under the nozzle. The suspension flows out of the buffer device and then flows into the filter device. It is vacuum filtered by a vacuum pump, and then the filter cake is vacuum freeze-dried to obtain fine potassium chlorate with an average particle size of 300nm.

[0023] Fine potassium chlorate particles are used as an oxidant to prepare pyrotechnic agents with sulfur, nanometer alumi...

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Abstract

The invention relates to a method for preparing thinned potassium chlorate used for fireworks and crackers, and belongs to the field of fireworks and crackers. The method comprises the following steps: adding potassium chlorate solution into a separating funnel, adding a non solvent into a water tank, and controlling the volume ratio of the potassium chlorate solution and the non solvent by adjusting the volume flow rate of a pressure pump 1 and a pressure pump 2; mixing the potassium chlorate solution and the non solvent through a nozzle, and then separating out potassium chlorate particles from the water solution; forming suspension of the thinned potassium chlorate particles by the separated potassium chlorate particles under the dispersion action of jet flow; and then after the suspension flows out from a buffering device and then enters a filter device, filtering the suspension, and freeze-drying filter cakes to obtain the thinned potassium chlorate particles. The thinned potassium chlorate, sulfur, nano aluminum powder and perlite powder are prepared into pyrotechnic compositions to form crackers. Through test, both the impact sensitivity of the pyrotechnic compositions and the sound-level value of the crackers conform to national standard requirements.

Description

technical field [0001] The invention relates to a preparation method of refined potassium chlorate used for fireworks and firecrackers, belonging to the field of fireworks and firecrackers. Background technique [0002] Fireworks and firecrackers, as the main component of civil ornamental fireworks, are an entertainment product that uses pyrotechnic powder to explode to emit sound and light. It is loved by people for its colorful sound, light, audio-visual effects. However, the fireworks and firecrackers industry is a high-risk industry, and vicious explosion accidents that cause mass death and mass injury occur from time to time. The direct cause of many accidents is that potassium chlorate is used as the oxidizing agent in the raw material of the agent and the operator lacks understanding of the thermal stability of the pyrotechnic agent containing potassium chlorate. Zhuo Nan and other scholars pointed out in their article "Development of Modified Potassium Chlorate" tha...

Claims

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Application Information

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IPC IPC(8): C06B29/02
Inventor 钱新明张凤汪佩兰邓楠
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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