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A high-energy chemical ignition powder coated with elastic hollow microspheres and its preparation method

A technology of elastic microspheres and ignition powder, which is used in explosive processing equipment, explosives, offensive equipment, etc., can solve the problem of dust explosion experiment data accuracy and repeatability that have great influence, poor repeatability of chemical ignition tool experiment results, friction sensitivity, mechanical The problem of high sensitivity can improve storage stability, improve accuracy and repeatability, and reduce sensitivity.

Active Publication Date: 2019-11-26
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical ignition powder composed of zirconium powder, barium nitrate and barium peroxide has the advantages of fast burning speed and strong ignition ability, but there are safety problems such as high friction sensitivity and mechanical sensitivity.
More importantly, the use of chemical ignition powder in the dust explosion experiment has disadvantages such as the ignition powder is not easy to shape, the flame spreads unevenly, and the charge is difficult. The performance of the ignition device is very important to obtain accurate dust explosion experiment parameters.
At the same time, through previous experiments, it was found that the chemical igniters made by traditional methods have the problem of poor repeatability of experimental results
[0003] Patent CN201510317031.4 reduces the sensitivity and molding of the ignition powder by adding a binder. Although the sensitivity is reduced, it does not consider the increase in the particle size of the ignition powder and the reduction in the burning speed of the ignition powder due to the coating of the ignition powder and the addition of the binder. and other issues, and the ignition powder combustion rate has a great influence on the accuracy and repeatability of the dust explosion experimental data
Therefore, this invention can not well solve the problem that chemical igniter exists in dust explosion experiment

Method used

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  • A high-energy chemical ignition powder coated with elastic hollow microspheres and its preparation method
  • A high-energy chemical ignition powder coated with elastic hollow microspheres and its preparation method
  • A high-energy chemical ignition powder coated with elastic hollow microspheres and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0029] Large-energy chemical igniting powder coated with elastic hollow microspheres: the mass ratio of zirconium powder in the igniter is 36%, the mass ratio of barium nitrate is 27%, the mass ratio of barium peroxide is 27%, and the mass ratio of paraffin wax 6%, and the mass ratio of polyvinyl acetate is 4%.

[0030] A method for preparing a high-energy chemical ignition charge coated with elastic hollow microspheres, the specific method steps are as follows:

[0031] St1: After mixing the basic components of the ignition powder, zirconium powder, barium nitrate, and barium peroxide at a mass ratio of 4:3:3, add paraffin wax as a desensitizing agent according to the mass ratio of the ignition powder at 90%:6%, and then add it Stir in petroleum ether until the paraffin wax is completely dissolved, and then put it in a vacuum drying oven to dry for 40 minutes. The temperature of the drying oven is controlled at 35° C. to prepare a paraffin-coated ignition powder.

[0032] St...

Embodiment 2

[0036] Large-energy chemical igniting powder coated with elastic hollow microspheres: the mass ratio of zirconium powder in the igniter is 36%, the mass ratio of barium nitrate is 27%, the mass ratio of barium peroxide is 27%, and the mass ratio of stearic acid The mass ratio is 7%, and the mass ratio of polyvinyl alcohol is 3%.

[0037] A method for preparing a high-energy chemical ignition charge coated with elastic hollow microspheres, the specific method steps are as follows:

[0038] St1: After mixing zirconium powder, barium nitrate, and barium peroxide, the basic components of ignition powder, in a mass ratio of 4:3:3, add stearic acid, a desensitizing agent, and then add it to alcohol and stir until the stearic acid is completely dissolved , and then put it into a vacuum oven for drying for 45 minutes, and the temperature of the oven was controlled at 30° C. to prepare the ignition powder coated with stearic acid.

[0039] St2: Add volatile alcohol to the ignition pow...

Embodiment 3

[0043] High-energy chemical igniting powder coated with elastic hollow microspheres: the mass ratio of zirconium powder in the igniter is 36%, the mass ratio of barium nitrate is 27%, the mass ratio of barium peroxide is 27%, the mass ratio of fluororubber is The ratio is 5%, and the mass ratio of gum arabic is 5%.

[0044] A method for preparing a high-energy chemical ignition charge coated with elastic hollow microspheres, the specific method steps are as follows:

[0045] St1: After mixing zirconium powder, barium nitrate, and barium peroxide, the basic components of the ignition powder, in a mass ratio of 4:3:3, add the insensitive agent fluororubber, then add it to tetrahydrofuran and stir until the fluororubber is completely dissolved, then Put it into a vacuum drying oven and dry it for 55 minutes, and the temperature of the drying oven is controlled at 35° C. to prepare the fluorine rubber-coated ignition powder.

[0046] St2: Add volatile ether to the fluorine rubber...

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Abstract

The invention relates to an ignition powder head, more specifically relates to a macro-energy chemical ignition powder head, particularly relates to an elastic hollow microsphere coated macro-energy chemical ignition powder head and a preparation method thereof and belongs to the field of energetic materials. The elastic hollow microsphere coated macro-energy chemical ignition powder head is mainly prepared from the following ingredients in parts by weight: 30 to 50 parts of zirconium powder, 20 to 40 parts of barium nitrate, 20 to 40 parts of barium peroxide, 2 to 10 parts of deterrent and 2to 10 parts of elastic microsphere material. The elastic hollow microsphere coated macro-energy chemical ignition powder head disclosed by the invention is prepared by a four-step method; by means ofthe hollow microspheres, the ignition powder can be in a spherical shape, isotropic propagation of suspension dust flame is ensured, and accuracy and repeatability of experiment data are improved; theignition powder prepared by the method is in a bulk shape, an ignition process can be finished instantly, and the problems of ignition failure, experiment errors and the like caused by too slow combustion speed of traditional ignition powder shaped by an adhesive are solved; the elastic hollow microspheres outside the ignition powder have the waterproof and antioxidant functions, so that storagestability of the ignition powder is remarkably improved.

Description

technical field [0001] The invention relates to an ignition charge, more specifically a high-energy chemical ignition charge, in particular to a high-energy chemical ignition charge coated with elastic hollow microspheres and a preparation method thereof, belonging to the field of energetic materials. Background technique [0002] The International Organization for Standardization stipulates that all solid particle suspensions with a particle size of less than 75 μm are commonly referred to as dust. Combustible dust suspended in the air is explosive, and the shock wave from the explosion can lift the dust on the ground and may cause a more powerful secondary explosion. Dust explosion test experiments can be used to explore and understand the occurrence, development and DDT mechanism of dust explosions, so as to provide theoretical basis, basic data and corresponding suggestions for dust explosion control, fire protection and accident investigation. In the dust explosion tes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B33/14C06B45/32C06B21/00C06B23/00
CPCC06B21/0066C06B21/0083C06B23/009C06B33/14C06B45/32
Inventor 刘蓉刘文近程扬帆宋诗祥方华陆松来
Owner ANHUI UNIV OF SCI & TECH
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