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Calcium sulfate composite oxidant for fireworks and crackers and preparation method thereof

A composite oxidant, fireworks and firecracker technology, applied in the direction of explosives, etc., can solve the problems of reducing the combustion performance of gunpowder, large safety hazards, poor moisture-proof performance, etc., and achieve the effects of reduced friction sensitivity, high safety, and high firing rate

Inactive Publication Date: 2010-09-22
谢新佑
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are large safety hazards, and the cost price is high
[0004] 2. Poor ignition performance
These two factors make this oxidizer safer but less ignitable
[0005] 3. Poor moisture resistance
Since the moisture absorption point of potassium perchlorate is lower than that of potassium chlorate, and potassium nitrate is lower, it is easy to be affected by moisture. The solution in the plan is to add a moisture-proof agent, but the effect is not ideal
[0006] 4. High bulk density
Since perlite is a filler that does not participate in chemical reactions in the combustion and explosion of gunpowder, it is a flame retardant, and its addition reduces the combustion performance of gunpowder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Calcined 25 parts of calcium sulfate dihydrate at 400°C for 50 minutes, cooled to room temperature, and crushed to a fineness of 900 mesh.

[0032] (2) Dry 20 parts of ferric oxide until the water content is lower than 0.2%, pulverize to a fineness of 1100 mesh, then heat to 80°C, add 0.5% stearic acid, and stir for 30 minutes.

[0033] (3) Grinding 30 parts of barium nitrate to 700 mesh, adding ferric oxide treated in step (2), mixing evenly, and grinding for 30 minutes.

[0034] (4) Mix 5 parts of potassium permanganate and 20 parts of potassium perchlorate evenly, pulverize to 700 mesh, then mix with calcium sulfate treated in step (1), and grind for 40 minutes.

[0035] (5) Mix the powder treated in step (3) and step (4) evenly, and stir for 60 minutes to obtain a composite oxidant product.

Embodiment 2

[0037] (1) Calcined 20 parts of calcium sulfate dihydrate at 680°C for 30 minutes, cooled to room temperature, and crushed to a fineness of 850 mesh.

[0038] (2) Dry 28 parts of ferric oxide until the water content is lower than 0.2%, pulverize to a fineness of 1200 mesh, then heat to 90°C, add 0.8% stearic acid, and stir for 30 minutes.

[0039] (3) Grinding 40 parts of barium nitrate to 800 mesh, adding ferric oxide treated in step (2), mixing evenly, and grinding for 60 minutes.

[0040] (4) Grind 12 parts of potassium permanganate to 800 mesh, mix with the calcium sulfate treated in step (1), and grind for 50 minutes.

[0041] (5) Mix the powder treated in step (3) and step (4) evenly, and stir for 90 minutes to obtain a composite oxidant product.

Embodiment 3

[0043] (1) Calcined 55 parts of calcium sulfate dihydrate at 500°C for 40 minutes, cooled to room temperature, and crushed to a fineness of 1000 mesh.

[0044] (2) Dry 12 parts of ferric iron tetroxide until the water content is lower than 0.2%, pulverize to a fineness of 1000 mesh, then heat to 85°C, add 0.6% aluminate, and stir for 30 minutes.

[0045] (3) Grind 4 parts of barium nitrate to 750 mesh, add ferric oxide treated in step (2), mix evenly, and grind for 40 minutes.

[0046] (4) Mix 1 part of potassium permanganate and 28 parts of potassium perchlorate evenly, pulverize to 750 mesh, mix with calcium sulfate treated in step (1), and grind for 60 minutes.

[0047] (5) Mix the powder treated in step (3) and step (4) evenly, and stir for 120 minutes to obtain a composite oxidant product.

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Abstract

The invention relates to a calcium sulfate composite oxidant for fireworks and crackers and a preparation method thereof, belonging to the technical field of chemical raw materials of the industry of the fireworks and crackers. The oxidant takes calcium sulfate and iron oxide as a main body assisted by barium nitrate, takes potassium permanganate and potassium perchlorate as initiators, and is added a small amount of an active agent. The preparation method comprises the following steps: roasting gypsum (calcium sulfate dihydrate), smashing, adding a mixed powder body of potassium permanganate and potassium perchlorate, grinding, smashing iron oxide, adding the active agent into the iron oxide powder, and then adding barium nitrate and grinding; and uniformly mixing the two types of ground powder. One of main raw materials of the invention is calcium sulfate which is non-toxic and has low price, and after being roasted the calcium sulfate, the calcium sulfate is not only an oxidant but also a moisture-proof agent and a leavening agent and also is a mechanical sensitivity buffer which is fine and smooth and slippery. Since the composite oxidant of the invention is prepared into the fireworks and crackers according to the traditional method, the fireworks and crackers has the advantages that the burning property is good, the safety is strong, the friction sensitivity and impact sensitivity are zero, and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to a calcium sulfate composite oxidant for fireworks and firecrackers and a preparation method thereof, belonging to the technical field of chemical raw materials used in the fireworks and firecrackers industry. Background technique [0002] Fireworks and firecrackers are mainly composed of oxidizing agents and combustible agents, and different amounts of binders, coloring agents, speed regulators, etc. are added according to different needs of the product. Oxidizer is an important part that affects the safety, explosive force, ignitability, moisture resistance and other properties of gunpowder. In particular, safety is of particular concern to the majority of consumers. In 2002, my country banned the use of extremely unsafe potassium chlorate as an oxidant for fireworks and firecrackers. Potassium perchlorate is widely used in the market now. But potassium perchlorate has several problems. One is that its production cost is h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B31/08
Inventor 谢新佑吴华武
Owner 谢新佑
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