Sulfur-free and pearlite-free firecracker reagent and preparation method thereof

A technology of perlite and firecrackers, which is applied in the direction of explosives, etc., can solve the problems of storage stability defects and high production costs, and achieve the effects of being beneficial to environmental protection, reducing the decomposition temperature, and increasing the rate of oxygen release

Inactive Publication Date: 2010-12-22
HUNAN VOCATIONAL INST OF SAFETY TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used oxidant is basically potassium perchlorate. However, its production cost is relatively high, and a few companies have developed composite oxidants and lattice combination oxidants that utilize potassium perchlorate, potassium nitrate, ammonium nitrate, barium nitrate and other raw materials. However, it has certain defects in the discharge effect and storage stability.

Method used

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  • Sulfur-free and pearlite-free firecracker reagent and preparation method thereof
  • Sulfur-free and pearlite-free firecracker reagent and preparation method thereof
  • Sulfur-free and pearlite-free firecracker reagent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Make the potion according to the following ratio

[0035] Component A: Potassium perchlorate 40%, potassium nitrate 30%, barium nitrate 30% to form a mixture, tartaric acid accounting for 3% of the mixture;

[0036] Component B: aluminum silver powder 65%, charcoal powder 10%, organic foaming powder 25%.

[0037] Produce firecrackers by the firecracker medicine that 60% A component and 40% B component are formed again. The test results are as follows:

[0038] Sound level: 108.5dB ≤ sound level value should be ≤ 122.2dB;

[0039] The time for the gas product pressure to rise from 0.69MP to 2.07MP is 1.74ms,

[0040] The pH value of the pyrotechnic powder is in the range of 5 to 9;

[0041] Moisture content of pyrotechnic powder ≤ 1.5%;

[0042] The moisture absorption rate of pyrotechnic powder is ≤2.0%;

[0043] The thermal stability of the pyrotechnic powder is that there is no decomposition phenomenon at 75°C±2°C for 48 hours;

[0044] The friction sensitivity...

Embodiment 2

[0048] Component A: Potassium perchlorate 20%, potassium nitrate 30%, barium nitrate 50% to form a mixture, tartaric acid accounting for 1% of the mixture;

[0049] Component B: Aluminum silver powder 75%, charcoal powder 20%, organic foaming powder 15%.

[0050] Produce firecrackers by the firecracker medicine that 50% A component and 50% B component are formed again. The test results are as follows:

[0051] The explosion rate is over 95%;

[0052] The firing rate reaches over 98%;

[0053] Sound level: 105.5dB ≤ sound level value should be ≤ 120.2dB;

[0054] The time for the gas product pressure to rise from 0.69MP to 2.07MP is 1.75ms;

[0055] The pH value of the pyrotechnic powder is in the range of 5 to 9;

[0056] Moisture content of pyrotechnic powder ≤1.02%;

[0057] The moisture absorption rate of pyrotechnic powder is ≤2.0%;

[0058] The thermal stability of the pyrotechnic powder is that there is no decomposition phenomenon at 75°C±2°C for 48 hours;

[005...

Embodiment 3

[0062] Component A: a mixture of potassium perchlorate 50%, potassium nitrate 10%, barium nitrate 40%, tartaric acid accounting for 5% of the mixture;

[0063] Component B: Aluminum silver powder 60%, charcoal powder 25%, organic foaming powder 15%.

[0064] Component A is 50%, and component B is 50%. The test results are as follows:

[0065] The explosion rate is over 95%;

[0066] The firing rate reaches over 98%;

[0067] Sound level: 107.5dB ≤ sound level value should be ≤ 125.2dB;

[0068] The time for the gas product pressure to rise from 0.69MP to 2.07MP is 1.8ms;

[0069] The pH value of the pyrotechnic powder is in the range of 5 to 9;

[0070] Moisture content of pyrotechnic powder ≤1.10%;

[0071] The moisture absorption rate of pyrotechnic powder is ≤2.0%;

[0072] The thermal stability of the pyrotechnic powder is that there is no decomposition phenomenon at 75°C±2°C for 48 hours;

[0073] The friction sensitivity of pyrotechnic powder is ≤35%;

[0074] Th...

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Abstract

The invention discloses a sulfur-free and pearlite-free firecracker reagent and a preparation method thereof. The reagent comprises the following mass components: 35-65 percent of A component and 35-65 percent of B component, wherein the A component comprises the mass compositions: a mixture formed by 20-50 percent of potassium perchlorate, 0-30 percent of potassium nitrate and 30-50 percent of barium nitrate and a complexing agent occupying 1-5 percent of the mixture, and the B component comprises the mass compositions: 50-80 percent of aluminum powder, 10-25 percent of charcoal powder and 10-25 percent of organic foaming powder. The burning rate of a firecracker prepared from the reagent is more than 98 percent, the sound level value is no less than 100dB and is no more than 140dB, the time the gas product pressure rises from 0.69MPa to 2.07MPa is 1.74ms, a pH value of the pyrotechnic composition is 5-9, the moisture is no more than 1.5 percent, the hygroscopicity is no more than 2.0 percent, the thermal stability is 75 DEG C plus / minus 2 DEG C, the firecracker has no decomposition phenomenon under the condition of 48h, the friction sensitivity is no more than 40 percent, and the impact sensitivity of the pyrotechnic composition is no more than 0 percent. The key is that the reagent reduces the environmental pollution without harm to human bodies and has great application prospect.

Description

technical field [0001] The invention belongs to the field of fireworks and firecrackers preparation, and in particular relates to a sulfur-free and perlite-free firecracker medicament and a preparation method thereof. Background technique [0002] Fireworks and firecrackers firecrackers are now used in the formula composition of the used explosives comprising combustibles, oxidizing agents and coloring agents. Combustible agents generally include: sulfur and aluminum powder, aluminum silver powder, aluminum-magnesium alloy powder, charcoal powder, titanium powder, coal powder, etc., in which the sulfur content is as high as about 20%; in order to reduce the charge, 10% perlite is often added ; When firecrackers explode, often produce a large amount of sulfur dioxide and perlite dust (being silicon dioxide), pollute the air and damage the environment. Especially during the Spring Festival, it has caused physical and mental harm to urban residents and consumers. The currentl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B33/14
Inventor 杨吉明
Owner HUNAN VOCATIONAL INST OF SAFETY TECH
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