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A low detonation velocity emulsion explosive and its application

A technology of emulsion explosives and low detonation velocity, applied in the directions of explosives, non-explosive stabilizers, non-explosive/non-thermal components, etc., to achieve the effect of reducing price, improving cost performance and reducing pollution

Active Publication Date: 2019-04-05
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the formulation design of low detonation velocity explosives has its limitations. For example, 20% to 25% of industrial salt is used in the above invention formulation, which has a non-negligible impact on the environment after long-term use.

Method used

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  • A low detonation velocity emulsion explosive and its application
  • A low detonation velocity emulsion explosive and its application
  • A low detonation velocity emulsion explosive and its application

Examples

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Effect test

preparation example Construction

[0049] In the preparation process of the explosive, an appropriate amount of common clay, an inert substance, is added and mixed to obtain the low detonation velocity emulsified explosive. Specifically, the embodiment of the present invention also provides a method for preparing the above-mentioned cheap new low detonation velocity emulsion explosive, which includes the following steps:

[0050] Weigh the raw materials according to the following mass percentages: 70% to 95% of the basic emulsion explosive; 5% to 30% of ordinary clay;

[0051] Put the basic emulsion explosive in a constant temperature box with a temperature of 60-80°C, keep it warm for 8 minutes to 12 minutes, take it out, mix it with ordinary clay according to the above ratio, and mix it evenly to obtain a low-detonation-velocity emulsion explosive that can be used for explosive welding. Packaging spare.

[0052] Correspondingly, the present invention also provides the application of the above-mentioned low d...

Embodiment 1

[0060] Prepare explosive welding low detonation velocity industrial explosive of the present invention as follows:

[0061] (1) Remove obvious stones and rubble from ordinary clay, then mix it in water according to the mass ratio of 1:12, stir it into mud and let it stand for 2 to 3 days;

[0062] (2) Remove impurities on the water surface, remove the water and take out the fully settled clay at the bottom of the water, pass through a 30-mesh sieve, and then dry until the moisture is not higher than 0.5wt%, and set aside.

[0063] Wherein, by scanning electron microscope (SEM) analysis, the appearance of the ordinary clay that has not been screened sees figure 1 , figure 1 The left side of the center is the SEM photo of common impurities at 100 μm, and the right side is the SEM photo of unsieved ordinary clay at 200 μm. Morphology of sieved common clay see figure 2 , figure 2 It is the SEM photo of the common clay that has been sieved in Example 1.

[0064] Carry out X-...

Embodiment 2

[0073] Prepare explosive welding low detonation velocity industrial explosive of the present invention as follows:

[0074] Get 80kg of basic emulsion explosive (prepared by the method in this manual, physically sensitized by expanded perlite), place it in a thermostat at 70°C, take it out after 10 minutes of heat preservation, and add 20kg of dried clay (same as Example 1), Mix evenly, obtain the low detonation velocity emulsion explosive (recorded as experimental group) of the present invention for explosive welding; Its density is 1.10g / m 3 , the detonation velocity is 2450m / s, and the intensity is 9.7mm, which is in line with special fields requiring low detonation velocity such as explosive welding. The explosives of the experimental group were applied to the explosion welding experiment of aluminum plate-stainless steel plate. When the thickness of the explosive was 10mm and the explosion height was 5.0mm, the composite effect of the two plates was good, and a typical wa...

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Abstract

The invention belongs to the technical field of industrial explosive and provides low-detonation-velocity emulsified explosive. The low-detonation-velocity emulsified explosive is prepared from basic emulsified explosive and clay, wherein the mass percent of the basic emulsified explosive is greater than 70 percent and is less than or equal to 95 percent; the mass percent of the clay is greater than or equal to 5 percent and is less than 30 percent; the basic emulsified explosive is obtained by sensitizing an emulsified matrix through a sensitizing agent; the clay is mainly prepared from main components including silicon dioxide and oxides of aluminum. Moreover, the invention further provides application of the low-detonation-velocity emulsified explosive to metal explosive welding. The low-detonation-velocity emulsified explosive provided by the invention has the advantages of low price and can be used for carrying out explosive welding on different metal materials, so that the detonation velocity and explosive grading of the emulsified explosive are easily adjusted by enterprises according to own requirements; the price of the compound special explosive for detonation is reduced and pollution to the environment is reduced to the greatest extent.

Description

technical field [0001] The invention belongs to the technical field of industrial explosives, in particular to a low-detonation velocity emulsion explosive and its application, which can be used for explosive welding between different metal materials, and in particular to the formula design and preparation process of cheap explosives. Background technique [0002] Explosive welding technology uses energetic materials as energy sources. Through the detonation process of energetic materials, cladding materials collide with base materials at high speed to realize metallurgical bonding between various metals. [0003] In the existing composite material production process, explosive composite has the advantages of high efficiency, reliability and economy. However, in order to make the composite material have a sufficiently high speed, the traditional explosive composite process often requires a large amount of charge, which leads to a direct result that the composite material is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B31/28C06B23/00B23K20/08
CPCB23K20/08C06B23/006C06B23/007C06B31/28C06B31/285
Inventor 马宏昊周国安沈兆武杨明
Owner UNIV OF SCI & TECH OF CHINA
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