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Preparation method of hollow polymer microsphere sensitized emulsion explosive for explosive welding

A technique of emulsified explosives and explosive welding, applied to explosives, non-explosive/non-thermal agent components, offensive equipment, etc., can solve problems such as the uniform distribution of sensitizers and clay, destruction of surrounding vegetation, and soil pollution, etc., to achieve Good market prospects, promotion of technology development, and simple preparation process

Inactive Publication Date: 2021-12-31
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can achieve the effect of reducing the detonation velocity very well, it is difficult to ensure that the sensitizer and clay are evenly distributed in the emulsified matrix when the sensitizer and clay are added to the emulsified matrix at the same time.
Common low detonation velocity emulsion explosives are usually prepared by adding industrial salt to the emulsion explosive, but industrial salt does not participate in the explosion reaction, and the residual industrial salt after explosion welding will pollute the local soil and seriously damage the surrounding vegetation

Method used

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  • Preparation method of hollow polymer microsphere sensitized emulsion explosive for explosive welding

Examples

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Effect test

Embodiment 1

[0028] Polymethyl methacrylate microsphere sensitized emulsion explosive, the mass percentage of the emulsified matrix is ​​80%, the mass percentage of the microsphere is 20%, and the detonation velocity of the prepared emulsion explosive is 2500m·s -1 , with a density of 0.8g cm -3 .

[0029] St1: Water phase preparation: Add raw material water (8%-12%) and sodium nitrate (8%-12%) into the water phase dissolving tank, heat and stir under the steam pressure of 0.4MPa, and mix the crushed ammonium nitrate (75%-85%) is added into the water phase melting tank according to the set ratio by lifting the screw conveying hopper, and after being completely melted, it is kept at 105-110°C for standby, or put into the water phase storage tank for heat preservation for standby.

[0030] St2: Oil phase preparation: Add the composite oil phase (3%-5%) and emulsifier (1%-3%) into the oil phase melting tank, stir under the condition of indirect steam heating, until all melted and reach 90-10...

Embodiment 2

[0034] Polystyrene and polysiloxane microsphere mixed sensitized emulsion explosive, the mass percentage of the emulsified matrix is ​​70%, the mass percentage of the microsphere is 30%, and the detonation velocity of the prepared emulsion explosive is 2200m·s -1 , with a density of 0.65g cm -3 .

[0035] St1: Water phase preparation: Add raw material water (8%-12%) and sodium nitrate (8%-12%) into the water phase dissolving tank, heat and stir under the steam pressure of 0.4MPa, and mix the crushed ammonium nitrate (75%-85%) is added into the water phase melting tank according to the set ratio by lifting the screw conveying hopper, and after being completely melted, it is kept at 105-110°C for standby, or put into the water phase storage tank for heat preservation for standby.

[0036] St2: Oil phase preparation: Add the composite oil phase (3%-5%) and emulsifier (1%-3%) into the oil phase melting tank, stir under the condition of indirect steam heating, until all melted and...

Embodiment 3

[0040] Polyamide microsphere sensitized emulsion explosive, the mass percentage of the emulsified matrix is ​​60%, the mass percentage of the microsphere is 40%, and the detonation velocity of the prepared emulsion explosive is 1900m·s -1 , with a density of 0.5 g cm -3 .

[0041] St1: Preparation of water phase: Add raw material water (8%-12%) and sodium nitrate (8%-12%) into the water phase melting tank, heat and stir under the steam pressure of 0.4MPa, and mix the crushed ammonium nitrate (75%-85%) is added into the water phase melting tank according to the set ratio by lifting the screw conveying hopper, and after being completely melted, it is kept at 105-110°C for standby, or put into the water phase storage tank for heat preservation for standby.

[0042] St2: Oil phase preparation: Add the composite oil phase (3%-5%) and emulsifier (1%-3%) into the oil phase melting tank, stir under the condition of indirect steam heating, until all melted and reach 90-100 ℃ for later ...

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Abstract

The invention discloses a preparation method of a hollow polymer microsphere sensitized emulsion explosive for explosive welding, the emulsion explosive for explosive welding is composed of an emulsion matrix and hollow polymer microspheres, the mass fraction of the emulsion matrix is 60%-80%; the mass fraction of the hollow polymer microspheres is 20%-40%; the emulsion matrix consists of ammonium nitrate, sodium nitrate, water, an emulsifier and a compound oil phase; the hollow polymer microspheres are formed by combining one or more of polymethyl methacrylate, polystyrene, polysiloxane and polyamide microspheres. In addition, the invention provides a preparation method of the emulsion explosive for explosive welding sensitized by the hollow polymer microspheres, the hollow polymer microspheres integrate the functions of a diluent and a sensitizer, and the raw materials of the emulsion explosive are low in cost and free of pollution to the environment. Meanwhile, enterprises can adjust the proportion and content of the hollow polymer microspheres according to the requirements of different composite materials, so that emulsion explosives for explosive welding with different detonation velocities and brisance are prepared.

Description

technical field [0001] The invention relates to a polymer sensitizer, more specifically a hollow polymer microsphere sensitizer, in particular to a method for preparing an emulsion explosive for explosive welding sensitized by a hollow polymer microsphere. Background technique [0002] Explosive welding is an explosive processing technology that uses explosives as the energy source to cause high-speed collisions between two or more metal bodies, thereby producing solid-phase metallurgical bonding between the metal bodies. [0003] With the rapid development of modern industry and science and technology, in chemical equipment, automobile shipbuilding, power machinery, metallurgy, medical equipment, building bridges and other manufacturing industries, due to the requirements for the comprehensive performance of materials, the performance of single metals and their alloys can reach Therefore, composite materials have been favored by people because of their superior performance....

Claims

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Application Information

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IPC IPC(8): C06B31/28C06B23/00
CPCC06B31/28C06B23/003
Inventor 王浩王瑞李子涵王文涛李世周
Owner ANHUI UNIV OF SCI & TECH
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