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Explosive

A technology of explosives and emulsified explosives, which is applied in the field of explosives and can solve the problems of explosive condensation and difficulty in use

Inactive Publication Date: 2005-04-13
가야꾸자팬가부시키가이샤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In addition, when explosives shaped into granules are stored for a long time, or when loaded by machinery, sometimes the explosives will condense, and the explosives will not disintegrate during use, making it difficult to handle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Add 90°C oxidant aqueous solution consisting of 75.0 parts of ammonium nitrate, 4.8 parts of sodium nitrate and 10.6 parts of water to 1.5 parts of microcrystalline wax, ethylene vinyl acetate copolymer resin (produced by DU PONT-MITSUI POLYCHEMICALS, trade name: EVAFLEX P-2807 , the number average molecular weight is 20000-30000, the melt flow rate is 15g / 10 minutes) in the mixture of 1.4 parts, sorbitan monooleate 2.9 parts, after fully stirring to obtain a water-in-oil emulsion. 3.8 parts of glass microspheres (specific gravity: 0.25 g / cc) were added thereto as fine hollow spheres, and stirred and mixed to obtain the water-in-oil emulsion explosive of the present invention. This water-in-oil emulsion explosive was molded by an extrusion molding machine having a die having a diameter of 8 mm, and cut into 10 mm lengths with a knife to obtain the explosive of the present invention. The specific gravity of the obtained explosive was 1.17.

Embodiment 2

[0056]Add 75.0 parts of ammonium nitrate, 4.8 parts of sodium nitrate and 10.6 parts of water to 1.5 parts of microcrystalline wax, ethylene vinyl acetate copolymer resin (produced by TOSOHCORPORATION, trade name: ULTRACEN, number average molecular weight: 37000, melt Volume flow rate is 150g / 10 minutes) in the mixture of 1.4 parts, sorbitan monooleate 2.9 parts, through fully stirring to obtain water-in-oil type emulsion. 3.8 parts of glass microspheres (specific gravity: 0.25 g / cc) were added thereto as fine hollow spheres, and stirred and mixed to obtain the water-in-oil type emulsion explosive in the present invention. This water-in-oil emulsion explosive was molded by an extrusion molding machine having a die having a diameter of 8 mm, and cut into 10 mm lengths with a knife to obtain the explosive of the present invention. The specific gravity of the obtained explosive was 1.17.

Embodiment 3

[0069] Add 90°C oxidant aqueous solution consisting of 75.0 parts of ammonium nitrate, 4.8 parts of sodium nitrate, and 10.6 parts of water to 2.0 parts of microcrystalline wax, ethylene vinyl acetate copolymer resin (produced by TOSOHCORPORATION, trade name: ULTRACEN722, melt flow rate: 400g / 10 minutes) in a mixture of 0.9 parts and sorbitan monooleate 2.9 parts, and fully stirred to obtain a water-in-oil emulsion. 3.8 parts of glass microspheres (specific gravity: 0.25 g / cc) were added thereto as fine hollow spheres, and stirred and mixed to obtain the water-in-oil emulsion explosive of the present invention. This water-in-oil emulsion explosive was molded by an extrusion molding machine having an extrusion die having a diameter of 8 mm, and cut into 10 mm lengths with a knife to obtain the explosive of the present invention. The specific gravity of the obtained explosive was 1.17.

[0070] The obtained explosives were subjected to the same detonation velocity, solidificat...

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Abstract

The invention relates to a water-in-oil emulsion explosive, which is characterized in that the explosive contains ethylene vinyl acetate copolymer, has good storage stability, and is not easy to produce explosives even if it is stored under a load for a long period of one year. Phenomenon of performance degradation and curing, only slight, easily disintegrating curing occurs partially, and is also very suitable for water since it can be filled with a filling machine even after long-term storage and has good water resistance hole blasting.

Description

technical field [0001] The present invention relates to an explosive. Specifically, it relates to a water-in-oil emulsion explosive used in industrial blasting operations such as tunnel excavation, quarrying, and mining. Background technique [0002] As industrial explosives used in blasting work etc., nitroglycerin explosives, aqueous explosives, ammonium nitrate explosives, ammonium oil explosives (hereinafter referred to as ANFO explosives) and the like are generally known. Among these explosives, aqueous explosives are widely used in industrial explosives because they do not contain gunpowder in their composition and are safer than conventional nitroglycerin explosives. Aqueous explosives can be classified into slurry explosives and emulsion explosives, among which emulsion explosives are characterized by good formability and weather resistance. Emulsion explosives have been variously improved since they were disclosed as water-in-oil emulsion explosives in US Pat. No....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B23/00C06B45/00C06B47/14
CPCC06B47/145C06B45/10
Inventor 绪方智博谷口弘幸佐藤善政
Owner 가야꾸자팬가부시키가이샤
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