Modified expanded ammonium nitrate explosive and preparation method thereof

A technology of expanded ammonium nitrate explosive and expanded ammonium nitrate, which is applied in the field of modified expanded ammonium nitrate explosive and its preparation, can solve the problems of high production cost, explosion resistance, and low charge density, and achieve low raw material cost and energy consumption for processing The effect of low and increased detonation velocity

Inactive Publication Date: 2011-06-15
广东南虹化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main defects of traditional expanded ammonium nitrate explosives are as follows: 1) the detonation sensitivity changes greatly, especially in high temperature and humid weather conditions, if measures are not taken in time, the expanded ammonium nitrate explosive produced will appear half-exploded or even fail to explode; 2 ) the charge density is small; 3) the explosive performance is reduced due to the small charge density; 4) the charge cost is high; 5) the drilling length increases, and the blasting cost increases; 6) the production process parameters are strict, such as water phase The temperature requirement is high, and the moisture content of the expansion nitrate should be small
The methods published in the above two patents

Method used

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  • Modified expanded ammonium nitrate explosive and preparation method thereof
  • Modified expanded ammonium nitrate explosive and preparation method thereof
  • Modified expanded ammonium nitrate explosive and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Water phase preparation: first, 10 parts of water was added to the container, and then 100 parts of crushed ammonium nitrate was slowly added, during which the heating was continued and heated to 70°C. Stir at a speed of 65 revolutions per minute during the ammonium nitrate dissolution process until the ammonium nitrate is completely dissolved.

[0035] Then, add 0.12 parts of expanding agent, and heat the solution to raise the temperature of the solution to 120°C. After the expanding agent is completely dissolved, add 2.5 parts of ammonium nitrate expanding crystal modifier. After miscibility, the aqueous phase forms a suspension, and the temperature of the suspension is kept at 120°C before use.

[0036] Expanded crystallization:

[0037] Firstly, the water phase obtained in the above steps is puffed and crystallized in a vacuum environment of -0.095MPa for 8 minutes, then the vacuum is broken and discharged to obtain the modified puffed ammonium nitrate, and the tem...

Embodiment 2

[0043] The steps of this embodiment are basically the same as those of Embodiment 1, the difference being the configuration of the water phase,

[0044] First, add 10 parts of water into the container and heat it to about 70°C, then slowly add 100 parts of crushed ammonium nitrate and heat to keep it warm. During the process of dissolving ammonium nitrate, stir at a speed of 65 rpm until the ammonium nitrate is completely dissolved. Then, 0.12 parts of swelling agent was added to raise the temperature of the solution to 115°C. After the puffing agent is completely dissolved, add 3 parts of ammonium nitrate puffing crystal modifier, the water phase will form a suspension after miscibility, and keep the temperature of the suspension at 115°C.

[0045] The crystallization expansion, the preparation of the oil phase, the mixing steps and the configuration ratio in the subsequent steps of this embodiment are the same as those in the first embodiment.

Embodiment 3

[0047] The steps of this embodiment are basically the same as those of Embodiment 1, the difference being the expanded crystallization:

[0048] First, add 10 parts of water into the container and heat it to about 70°C, then slowly add 100 parts of crushed ammonium nitrate and heat up, stirring at a speed of 65 revolutions per minute during the ammonium nitrate dissolution process until the ammonium nitrate is completely dissolved. Then, 0.12 parts of swelling agent was added to raise the temperature of the solution to 120°C. After the puffing agent is completely dissolved, add 2.5 parts of ammonium nitrate puffing crystal modifier, the water phase will form a suspension after miscibility, and keep the temperature of the suspension at 120°C.

[0049] Crystallization expansion: first expand and crystallize the water phase obtained in the above steps in a vacuum environment of -0.092MPa for 8 minutes, then break the vacuum and discharge to obtain modified expanded ammonium nitrate...

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Abstract

The invention relates to a modified expanded ammonium nitrate explosive and a preparation method thereof. The explosive comprises the following main components by weight percent: 85%-93% of ammonium nitrate, 3%-5% of composite oil phase, 0.05%-0.15% of expanding agent and 3%-5% of wood flour; and the explosive also contains 8.9% or less of ammonium nitrate expansion and crystallization modifier. In the production process, a defined amount of ammonium nitrate expansion and crystallization modifier is added to prepare the aqueous phase. Therefore, the aims of reducing the raw material cost and the processing energy consumption can be realized and the performances of the product are much higher than that of the prior art, especially the charge density and explosion velocity are obviously increased. the technical weaknesses of the prior art such as low charge density, poor explosion property and high charge cost can be solved.

Description

technical field [0001] The invention relates to a civil explosive and a preparation method thereof, in particular to a modified expanded ammonium nitrate explosive and a preparation method thereof. Background technique [0002] Expanded ammonium nitrate explosive is a powdery ammonium nitrate explosive. Due to its good explosive performance and no toxic and harmful components, TNT has become the main variety of powdered ammonium nitrate explosive in my country, accounting for more than 50%. The leading product of my country's industrial explosives. According to the actual production of the expanded explosive formula and process parameters announced in the book "Expanded Ammonium Nitrate Explosive" (ISBN 7-80132-865-5) edited by Lu Chunxu and others and the existing traditional expanded ammonium nitrate explosive, in its formula, except There are no other additives except ammonium nitrate, wood powder, oil phase and a small amount of ammonium nitrate expansion agent. The main...

Claims

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Application Information

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IPC IPC(8): C06B31/30
Inventor 陈靖宇郭列国宋强王万勇潘海雄罗坚赖健英王林
Owner 广东南虹化工有限公司
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