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Oil-in-water powdery emulsion explosive, preparation method and application thereof

A technology of powdery emulsion explosives and oil-in-water type, which is applied to explosives processing equipment, explosives, offensive equipment, etc., and can solve the problems of large consumption of compressed air and dry air, high viscosity of water-in-oil type emulsions, and increased investment costs. , to achieve the effect of improving intrinsic safety, excellent caking resistance, and reducing the cost of explosives

Inactive Publication Date: 2010-07-28
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The explosive has good explosive performance, but the linear velocity of the emulsifier is high, and the viscosity of the water-in-oil emulsion is relatively high. It is necessary to configure a special screw pump to transport the explosive emulsion under high pressure. The stage needs to consume

Method used

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  • Oil-in-water powdery emulsion explosive, preparation method and application thereof
  • Oil-in-water powdery emulsion explosive, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Example 1 Taking the preparation of 500 kg of oil-in-water powdery emulsion explosive as an example, the mass percentages of the selected components are: ammonium nitrate 87.6, emulsifier (surfactant BS-12) 0.01, water 7.99, composite wax 4.4 . Accurately weigh 438 kg of ammonium nitrate, 0.05 kg of emulsifier, 39.95 kg of water, and 22 kg of composite wax according to the above proportioning ratio.

[0017] Operation steps: the first step is to heat and dissolve ammonium nitrate, emulsifier and water and raise the temperature to 113°C; the second step is to heat and melt the composite wax and raise the temperature to 125°C; the third step is to mix the oxidant solution and combustible solution into a uniform The oil-in-water emulsion mixture; the fourth step is to dehydrate and dry the mixture obtained in the third step to form an oil-in-water powder emulsion explosive; the fifth step is to prepare the oil-in-water powder emulsion explosive in the fourth step After be...

Embodiment 2

[0018] Example 2 Taking the preparation of 500 kg of oil-in-water powdery emulsion explosive as an example, the mass percentages of each component are selected as: ammonium nitrate 81.9, emulsifier (ligninsulfonate quaternary ammonium salt) 0.1, water 12.6, composite wax 5.4. Accurately weigh 409.5 kg of ammonium nitrate, 0.5 kg of emulsifier, 63 kg of water, and 27 kg of composite wax according to the above proportioning ratio.

[0019] Operation steps: the first step is to heat and dissolve ammonium nitrate, emulsifier and water and raise the temperature to 100°C; the second step is to heat and melt the composite wax and raise the temperature to 105°C; the third step is to mix the oxidant solution and combustible solution The oil-in-water emulsion mixture; the fourth step is to dehydrate and dry the mixture obtained in the third step to form an oil-in-water powder emulsion explosive; the fifth step is to prepare the oil-in-water powder emulsion explosive in the fourth step ...

Embodiment 3

[0020] Example 3 Taking the preparation of 500 kilograms of oil-in-water powdery emulsion explosives as an example, the mass percentages of the selected components are: ammonium nitrate 81.9, emulsifier (surfactant BS-12) 0.3, water 12.6, composite wax 5.2 . Accurately weigh 409.5 kilograms of ammonium nitrate, 1.5 kilograms of emulsifier, 63 kilograms of water, and 26 kilograms of composite wax according to the above proportioning ratio.

[0021] Operation steps: the first step is to heat and dissolve ammonium nitrate, emulsifier and water and raise the temperature to 100°C; the second step is to heat and melt the composite wax and raise the temperature to 105°C; the third step is to mix the oxidant solution and combustible solution The oil-in-water emulsion mixture; the fourth step is to dehydrate and dry the mixture obtained in the third step to form an oil-in-water powder emulsion explosive; the fifth step is to prepare the oil-in-water powder emulsion explosive in the fou...

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Abstract

The invention discloses an oil-in-water powdery emulsion explosive, which contains the following components in percentage by mass: 84 to 95 percent of ammonium nitrate, 0 to 11.5 percent of flame inhibitor, 4 to 6 percent of organic oil-phase material, 0.01 to 0.5 percent of emulsifier and 0.1 to 0.5 percent of water, wherein the ammonium nitrate, the flame inhibitor, the emulsifier and the water form oxidant aqueous-phase solution, and the organic oil-phase material forms combustible oil-phase solution. The invention also discloses a preparation method and application of the explosive. The preparation method comprises: heating and dissolving a mixture consisting of the ammonium nitrate, the flame inhibitor, the emulsifier and the water and raising temperature to form the oxidant aqueous-phase solution; heating and melting the organic oil-phase material and raising temperature to form oil-phase combustible agent solution; adding the oil-phase combustible agent solution to the stirred oxidant aqueous-phase solution; emulsifying the obtained product into oil-in-water latex and then preparing the obtained product into the oil-in-water powdery emulsion explosive through negative-pressure drying; and loading the obtained explosive cooled by cold air. The explosive has the advantages of excellent performance, low moisture content, simple preparation method, high yield and good market prospects.

Description

technical field [0001] The invention relates to an explosive and its production method and application, in particular to a powdery emulsion explosive with an oil-in-water emulsion structure, its production method and application. Background technique [0002] Common emulsion explosives are water-in-oil emulsions in which the oxidant phase is the dispersed phase and the organic fuel is the continuous phase, and generally have a very high viscosity. The key emulsification process of this emulsion explosive is an emulsifier that rotates at a high speed in a small gap There are serious security risks. Making emulsion explosives into powdery products is an effective way to improve their explosive performance. For example, Chinese patent ZL 03 1 3 1 865.7 proposes a powdery emulsion explosive and its preparation method. In this method, the water phase and the oil phase are first prepared. Viscous water-in-oil latex, and then use the spray drying method to make the latex into rock...

Claims

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Application Information

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IPC IPC(8): C06B31/28C06B21/00
Inventor 倪欧琪唐双凌张凯铭俞珍权
Owner NANJING UNIV OF SCI & TECH
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